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Accession number:20201708572736

Title:Neural-Adaptive Finite-Time Formation Tracking Control of Multiple Nonholonomic Agents with a Time-Varying Target????(Open Access)

Authors:Zhou, Kai-Bo (1); Wu, Xiao-Kang (1); Ge, Ming-Feng (2); Liang, Chang-Duo (2); Hu, Bing-Liang (3)

Author affiliation:(1) MOE Key Laboratory of Image Processing and Intelligence Control, School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan, China; (2) School of Mechanical Engineering and Electronic Information, China University of Geosciences, Wuhan, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China

Corresponding author:Hu, Bing-Liang(hbl@opt.ac.cn)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:62943-62953

Article number:9036939

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:This paper investigates the leader-following formation tracking problem (FTP) for multiple nonholonomic agent systems (MNASs) in the presence of external disturbances and parametric uncertainties, where both the kinematics and dynamics of the agents are taken into consideration. A novel finite-time distributed controller-estimator algorithm (DCEA) is designed to handle such a challenging problem. Based on Lyapunov stability method, the sufficient conditions for finite-time stability of the closed-loop system are derived. Finally, the simulation results are presented to demonstrate the effectiveness and the robustness of the proposed DCEA.

© 2013 IEEE.

Number of references:45

Main heading:Target tracking

Controlled terms:Closed loop systems

Uncontrolled terms:Distributed controller - Estimator algorithms - External disturbances - Finite time stability - Formation tracking - Kinematics and dynamics - Lyapunov stability - Parametric uncertainties

Classification code:961 Systems Science

DOI:10.1109/ACCESS.2020.2980894

Funding details: Number: 61703374, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China under Grant 61703374.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20203809183223

Title:Space Debris Detection Using Feature Learning of Candidate Regions in Optical Image Sequences????(Open Access)

Authors:Xi, Jiangbo (1); Y., Xiang; O.K., Ersoy; M., Cong; X., Wei; J., Gu

Author affiliation:(1) School of Geology Engineering and Geomatics, Chang'An University, Xi'an, China; (2) School of Geography, Nanjing Normal University, Nanjing, China; (3) School of Electrical and Computer Engineering, Purdue University, West Lafayette; IN, United States; (4) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an, China; (5) School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing; 10039, China

Corresponding author:Gu, Junkai(dcgjk@chd.edu.cnemailxijiangbo@chd.edu.cn)Xi, Jiangbo(xijiangbo@chd.edu.cn)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:150864-150877

Article number:9167211

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Space debris detection is important in space situation awareness and space asset protection. In this article, we propose a method to detect space debris using feature learning of candidate regions. The acquired optical image sequences are first processed to remove hot pixels and flicker noise, and the nonuniform background information is removed by the proposed one dimensional mean iteration method. Then, the feature learning of candidate regions (FLCR) method is proposed to extract the candidate regions and to detect space debris. The candidate regions of space debris are precisely extracted, and then classified by a trained deep learning network. The feature learning model is trained using a large number of simulated space debris with different signal to noise ratios (SNRs) and motion parameters, instead of using real space debris, which make it difficult to extract a sufficient number of real space debris with diverse parameters in optical image sequences. Finally, the candidate regions are precisely placed in the optical image sequences. The experiment is performed using the simulated data and acquired image sequences. The results show that the proposed method has good performance when estimating and removing background, and it can detect low SNR space debris with high detection probability.

© 2013 IEEE.

Number of references:52

Main heading:Space debris

Controlled terms:Deep learning - Feature extraction - Geometrical optics - Image acquisition - Iterative methods - Learning systems - Signal to noise ratio

Uncontrolled terms:Background information - Feature learning - High detection probability - Image sequence - Iteration method - Learning network - Motion parameters - Space situation awareness

Classification code:656.1 Space Flight - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 741.1 Light/Optics - 921.6 Numerical Methods

DOI:10.1109/ACCESS.2020.3016761

Funding details: Number: 2018ZZ02, Acronym: -, Sponsor: -;Number: 2018JQ4037, Acronym: -, Sponsor: -;Number: 61806022, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 300102269103,300102269205,300102269304, Acronym: CHD, Sponsor: Chang'an University;Number: SKLGIE2018-M-3-4, Acronym: SKLGIE, Sponsor: State Key Laboratory of Geo-Information Engineering;Number: 300102269402, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61806022; in part by the Fund Project of Shaanxi Key Laboratory of Land Consolidation under Grant 2018ZZ02; in part by the State Key Laboratory of Geo-Information Engineering under Grant SKLGIE2018-M-3-4; in part by the Fundamental Research Funds for the Central Universities, CHD, under Grant 300102269103, Grant 300102269304, and Grant 300102269205; in part by the Fundamental Research Funds for Innovation Team Project of the Central Universities, under Grant 300102269402; and in part by the Natural Science Basic Research Plan in Shaanxi Province of China under Grant 2018JQ4037.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20202008647539

Title:Suppression of substrate mode in GaN-based green laser diodes????(Open Access)

Authors:Jiang, Lingrong (1, 2, 3); Liu, Jianping (1, 2, 3); Zhang, Liqun (1, 3); Qiu, Bocang (4); Tian, Aiqin (1, 3); Hu, Lei (1, 2, 3); Li, Deyao (1, 3); Huang, Siyi (1, 3); Zhou, Wei (1, 3); Ikeda, Masao (1, 3); Yang, Hui (1, 2, 3)

Author affiliation:(1) Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou; 215123, China; (2) School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei; 230026, China; (3) Key Laboratory of Nanodevices and Applications, Chinese of Academy of Sciences, Suzhou; 215123, China; (4) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710000, China

Corresponding author:Liu, Jianping(jpliu2010@sinano.ac.cn)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:28

Issue:10

Issue date:May 11, 2020

Publication year:2020

Pages:15497-15504

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:Parasitic substrate mode readily appears in GaN-based laser diodes (LDs) because of insufficient optical confinement, especially for green LDs. Substrate modes affect the behavior of a LD severely, including the laser beam quality, the optical output power, the longitudinal mode stability, and the maximum modulation speed. In this article, systematic studies on the n-cladding layer (CL) design to suppress the substrate mode of GaN-based green LDs were carried out. We established a contour map to describe the relationship between the optical confinement (determined by the thickness and the refractive index) of n-CL and the substrate mode intensity by simulating the near-field pattern and the far-field pattern. We found that it was difficult to obtain the Gaussian-shape far-field pattern using AlGaN as a cladding layer due to the appearance of cracks induced by tensile strain. However, this can be realized by introducing quaternary AlInGaN as a cladding layer since refractive index and strain can be tuned separately for quaternary alloy.

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Number of references:21

Main heading:Gallium nitride

Controlled terms:Aluminum gallium nitride - Cladding (coating) - III-V semiconductors - Laser beams - Refractive index - Semiconductor alloys - Tensile strain

Uncontrolled terms:Far-field patterns - GaN based laser diodes - Longitudinal modes - Near field patterns - Optical confinement - Optical output power - Quaternary AlInGaN - Quaternary alloys

Classification code:741.1 Light/Optics - 744.8 Laser Beam Interactions - 804.2 Inorganic Compounds - 931.1 Mechanics

DOI:10.1364/OE.389880

Funding details: Number: 61574160,61704184,61804164,61834008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018M630619, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: BK20180254, Acronym: -, Sponsor: Natural Science Foundation of Jiangsu Province;Number: 2016YFB0401803,2017YFB0405000,2017YFE0131500, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);

Funding text:National Key Research and Development Program of China (2016YFB0401803, 2017YFB0405000, 2017YFE0131500); National Natural Science Foundation of China (61574160, 61704184, 61804164, 61834008); Natural Science Foundation of Jiangsu Province (BK20180254); China Postdoctoral Science Foundation (2018M630619).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20200508115914

Title:Squared peak-to-peak algorithm for the spectral interrogation of short-cavity fiber-optic Fabry–Perot sensors

Authors:Chen, Haibin (1, 2); Zhang, Yao (1, 4); Li, Yang (2, 3); Jing, Xin (2, 3); Yuan, Suzhe (2, 3); Zhang, Xiongxing (1, 4); Wang, Wei (1, 4); Liu, Rong (1, 4); Guo, Quanmin (5)

Author affiliation:(1) School of Optoelectronic Engineering, Xi’an Technological University, Xi’an; 710021, China; (2) Shaanxi Key Laboratory of Integrated and Intelligent Navigation, Xi’an; 710068, China; (3) Xi’an Research Institute of Navigation Technology, Xi’an; 710068, China; (4) Shaanxi Province Key Laboratory of Photoelectric Measurement and Instrument Technology, Xi’an Technological University, Xi’an; 710021, China; (5) School of Electronic Information Engineering, Xi’an Technological University, Xi’an; 710021, China

Corresponding author:Wang, Wei(wangwei@xatu.edu.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:4

Issue date:February 1, 2020

Publication year:2020

Pages:1198-1205

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:The cavity length of short-cavity Fabry–Perot (FP) sensors cannot be effectively interrogated using the conventional peak-to-peak method if the spectrum of the exciting source is not wide enough. In this paper, we propose a squared peak-to-peak algorithm for interrogation of short-cavity fiber-optic FP sensors. By squaring the DC-filtered reflection spectrum of an FP sensor in the frequency domain, we produce an additional peak, with which the cavity length of a sensor can be estimated using the same calculations as performed with the conventional peak-to-peak method. For investigation of the feasibility of this technique, we conducted simulations and practical experiments analyzing fiber-optic FP sensors with cavity lengths in the range of 15–25 µm. The maximum error in cavity length estimated using the proposed algorithm in experiments was 0.030 µm.

© 2020 Optical Society of America.

Number of references:26

Main heading:Fiber optic sensors

Controlled terms:Fiber optics - Frequency domain analysis

Uncontrolled terms:Cavity length - Frequency domains - Maximum error - Peak-to-peak - Reflection spectra - Short cavity

Classification code:741.1.2 Fiber Optics - 921.3 Mathematical Transformations

DOI:10.1364/AO.382169

Funding details: Number: 201805061ZD12CG45, Acronym: -, Sponsor: -;Number: 2019GY-094, Acronym: -, Sponsor: -;Number: SKLIIN-20180210, Acronym: -, Sponsor: -;Number: 61905187, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. National Natural Science Foundation of China (61905187); The Foundation of Shaanxi Key Laboratory of Integrated and Intelligent Navigation (SKLIIN-20180210); Key Research and Development Program of Shaanxi (2019GY-094); Xi’an Key Laboratory of Intelligent Detection and Perception (201805061ZD12CG45); Program for Fostering Talents of Xi’an Association for Science and Technology (6).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20191506769185

Title:Fabrication of hollow polymer microstructures using dielectric and capillary forces????(Open Access)

Authors:Tonry, Catherine E. H. (1); Patel, Mayur K. (1); Yu, Weixing (2); Desmulliez, Marc P. Y. (3); Bailey, Christopher (1)

Author affiliation:(1) Computational Mechanics and Reliability Group (CMRG), Centre for Numerical Modelling and Process Analysis, University of Greenwich, 30 Park Row, London; SE10 9LS, United Kingdom; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; Shaanxi, China; (3) Microsystems Engineering Centre (MISEC), School of Engineering and Physical Sciences, Heriot-Watt University, Earl Mountbatten Building, Edinburgh; EH14 4AS, United Kingdom

Corresponding author:Tonry, Catherine E. H.(C.Tonry@greenwich.ac.uk)

Source title:Microsystem Technologies

Abbreviated source title:Microsyst Technol

Volume:26

Issue:2

Issue date:February 1, 2020

Publication year:2020

Pages:301-308

Language:English

ISSN:09467076

E-ISSN:14321858

Document type:Journal article (JA)

Publisher:Springer Science and Business Media Deutschland GmbH

Abstract:Electric Field Assisted Capillarity is a novel one-step process suitable for the fabrication of hollow polymer microstructures. The process, demonstrated to work experimentally on a microscale using Polydimethylsiloxane (PDMS), makes use of both the electrohydrodynamics of polymers subject to an applied voltage and the capillary force on the polymers caused by a low contact angle on a heavily wetted surface. Results of two-dimensional numerical simulations of the process are discussed in this paper for the special case of production of microfluidic channels. The paper investigates the effects of altering key parameters including the contact angle with the top mask, the polymer thickness and air gap, the permittivity of the polymer, the applied voltage and geometrical variations on the final morphology of the microstructure. The results from these simulations demonstrate that the capillary force caused by the contact angle has the greatest effect on the final shape of the polymer microstructures.

© 2019, The Author(s).

Number of references:8

Main heading:Contact angle

Controlled terms:Electrohydrodynamics - Fabrication - Microstructure - Morphology - Polydimethylsiloxane - Silicones

Uncontrolled terms:Applied voltages - Geometrical variations - Microfluidic channel - One-step process - Polydimethylsiloxane PDMS - Polymer microstructures - Polymer thickness - Two-dimensional numerical simulation

Classification code:815.1.1 Organic Polymers - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science

DOI:10.1007/s00542-019-04409-z

Funding details: Number: EP/C534212/1, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: University of Greenwich;Number: EP/F02553X/1, Acronym: EPSRC, Sponsor: Engineering and Physical Sciences Research Council;

Funding text:The authors would like to acknowledge the financial support from the UK Engineering and Physical Research Science Council (EPSRC) through the grants EP/F02553X/1 (Scottish Manufacturing Institute, SMI) and EP/C534212/1 (3D-Mintegration). Financial support from the University of Greenwich is also gratefully acknowledged.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Hybrid Gold, Green

Accession number:20205209687965

Title:Enhanced four-wave mixing in micro-ring resonators with integrated 2D layered graphene oxide films

Authors:Wu, Jiayang (1); Yang, Yunyi (1); Zhang, Yuning (1); Qu, Yang (1); Jia, Linnan (1); Xu, Xingyuan (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4); Jia, Baohua (1); Mossa, David J. (1)

Author affiliation:(1) Swinburne University of Technology, Optical Sciences Centre, Hawthorn; VIC; 3122, Australia; (2) City University of Hong Kong, Department of Physics, 83 Tat Chee Avenue, Hong Kong, Hong Kong; (3) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics, Chinese Academy of Science, Xi'an, China; (4) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada

Source title:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020 - Proceedings

Abbreviated source title:Conf. Lasers Electro-Opt. Pac. Rim, CLEO-PR - Proc.

Part number:1 of 1

Issue title:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020 - Proceedings

Issue date:August 2020

Publication year:2020

Article number:9255962

Language:English

ISBN-13:9780646825045

Document type:Conference article (CA)

Conference name:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020

Conference date:August 3, 2020 - August 5, 2020

Conference location:Sydney, NSW, Australia

Conference code:165122

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Two-dimensional layered graphene oxide films are integrated with micro-ring resonators to experimentally demonstrate enhanced four-wave mixing, achieving up to \sim7.6 - dB enhancement in conversion efficiency for a uniformly coated device and \sim10.3 - dB for a patterned device.

© 2020 IEEE.

Number of references:15

Main heading:Oxide films

Controlled terms:Four wave mixing - Graphene - Optical resonators

Uncontrolled terms:Coated devices - Microring resonator

Classification code:741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally

DOI:10.1364/CLEOPR.2020.C11E_4

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204009261488

Title:Enhanced Four-Wave Mixing in Micro-Ring Resonators Integrated with Layered Graphene Oxide Films

Authors:Wu, Jiayang (1); Yang, Yunyi (1); Zhang, Yuning (1); Qu, Yang (1); Jia, Linnan (1); Xu, Xingyuan (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4); Jia, Baohua (1); Moss, David J. (1)

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) Department of Physics, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, Hong Kong; (3) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics, Chinese Academy of Science, Xi'an, China; (4) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada

Source title:Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS

Abbreviated source title:Conf Proc Laser Electr Optic Soc Annu Meet CLEO

Volume:2020-May

Part number:1 of 1

Issue title:2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings

Issue date:May 2020

Publication year:2020

Article number:9192536

Language:English

ISSN:10928081

CODEN:CPLSE4

ISBN-13:9781943580767

Document type:Conference article (CA)

Conference name:2020 Conference on Lasers and Electro-Optics, CLEO 2020

Conference date:May 10, 2020 - May 15, 2020

Conference location:San Jose, CA, United states

Conference code:163003

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We experimentally demonstrate enhanced four-wave mixing in micro-ring resonators (MRRs) integrated with graphene oxide films. We achieve up to ∼7.6-dB enhancement in conversion efficiency for a uniformly coated MRR and ∼10.3-dB for a patterned device.

© 2020 OSA.

Number of references:15

Main heading:Oxide films

Controlled terms:Four wave mixing - Graphene - Optical resonators

Uncontrolled terms:Microring resonator

Classification code:741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200808199413

Title:Importance of the parallel polarization radiance for estimating inorganic particle concentrations in turbid waters based on radiative transfer simulations

Authors:Liu, Jia (1); Hu, Bingliang (1); He, Xianqiang (2, 3); Bai, Yan (2, 3); Tian, Liqiao (4); Chen, Tieqiao (1); Wang, Yihao (1); Pan, Delu (2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of CAS, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) School of oceanography, Shanghai Jiao Tong University, Shanghai, China; (4) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China

Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)

Source title:International Journal of Remote Sensing

Abbreviated source title:Int. J. Remote Sens.

Volume:41

Issue:13

Issue date:July 2, 2020

Publication year:2020

Pages:4923-4946

Language:English

ISSN:01431161

E-ISSN:13665901

CODEN:IJSEDK

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd.

Abstract:Contemporary ocean colour radiometers and inversion algorithms to derive optical properties and oceanic constituents rely only on the scalar treatment of water-leaving radiance (Lw). However, Lw polarization components, which contain embedded hydrosol information, have been largely neglected. Here, we examine Lw polarization characteristics, based on vector radiative transfer (RT) simulation, for determining suspended particulate matter in highly turbid waters. The RT simulations show that parallel polarization radiance (PPR) can improve the retrieval of Lw, with a higher relative fraction of ocean colour signal to total radiance (Ioc/It) than the total intensity (I). Moreover, the reflectance for PPR (ρp), compared with that for I, is more sensitive to inorganic particle concentration (IPC) variations, particularly those in the red and NIR bands. Additionally, ρp displays significant directional and spectral variations with respect to geometrical conditions, and the maximum ρp (~10%) is highly peaked at 555 nm in the solar plane. Furthermore, the superiority of PPR to retrieve IPCs, based on the back propagation neural network, was discussed with a very high determination coefficient. Significant improvements in inversion accuracy were observed for PPR with a lower relative deviation (0.901%) than I (3.740%). This study highlights that PPR might be used as an alternative approach to retrieve Lw and thus to derive biogeochemical parameters, particularly in turbid coastal waters.

© 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.

Number of references:67

Main heading:Polarization

Controlled terms:Backpropagation - Biogeochemistry - Optical properties - Radiative transfer - Water treatment

Uncontrolled terms:Back propagation neural networks - Determination coefficients - Polarization characteristics - Polarization components - Radiative transfer simulations - Suspended particulate matters - Vector radiative transfer - Water-leaving radiances

Classification code:445.1 Water Treatment Techniques - 481.2 Geochemistry - 701 Electricity and Magnetism - 723.4 Artificial Intelligence - 741.1 Light/Optics

Numerical data indexing:Percentage 3.74e+00%, Percentage 9.01e-01%

DOI:10.1080/01431161.2020.1727059

Funding details: Number: 2017YFA0603003, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 17R02, Acronym: WHU, Sponsor: Wuhan University;Number: -, Acronym: LIESMARS, Sponsor: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing;Number: -, Acronym: SOED, Sponsor: State Key Laboratory of Satellite Ocean Environment Dynamics;Number: 201505003, Acronym: -, Sponsor: -;Number: 2019JQ-929, Acronym: -, Sponsor: -;Number: 2017C03037, Acronym: -, Sponsor: Primary Research and Development Plan of Zhejiang Province;Number: 41706207, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QNHX1932, Acronym: -, Sponsor: -;

Funding text:This work was supported by the National Key Research and Development Program of China under Grant 2017YFA0603003, the National Natural Science Foundation of China under Grants 41706207, 41676170, 41676172, 41825014 and 41621064, the National Science Basic Research Foundation of Shaanxi Province (Grant #2019JQ-929), the Key Research and Development Plan of Zhejiang Province (Grant #2017C03037), the Public Science and Technology Research Funds Projects for Ocean Research (Grant #201505003), the public fund of State Key Laboratory of Satellite Ocean Environment Dynamics, the Second Institute of Oceanography, Ministry of Natural Resources under Grants QNHX1932 and SOEDZZ1801, and the Open Research Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University under Grant 17R02.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201608478914

Title:Integrated polarizers based on graphene oxide in waveguides and ring resonators????(Open Access)

Authors:Wu, Jiayang (1); Y., Yang; Y., Zhang; Y., Qu; X., Xu; L., Jia; Y., Liang; S.T., Chu; B.E., Little; R., Morandotti; B., Jia; D., Moss

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (3) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi'an, China; (4) INRS -Énergie, Matériaux et Télécommunications, Varennes; QC, Canada; (5) ITMO University, St. Petersburg, Russia; (6) University of Electronic Science and Technology of China, Chengdu, China

Corresponding author:Moss, David(dmoss@swin.edu.au)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11282

Part number:1 of 1

Issue title:2D Photonic Materials and Devices III

Issue date:2020

Publication year:2020

Article number:112820U

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510633278

Document type:Conference article (CA)

Conference name:2D Photonic Materials and Devices III 2020

Conference date:February 5, 2020 - February 6, 2020

Conference location:San Francisco, CA, United states

Conference code:159101

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Polarization selective devices, such as polarizers and polarization selective resonant cavities (e.g., gratings and ring resonators), are core components for polarization control in optical systems and find wide applications in polarizationdivision- multiplexing, coherent optical detection, photography, liquid crystal display, and optical sensing. In this paper, we demonstrate integrated waveguide polarizers and polarization-selective micro-ring resonators (MRRs) incorporated with graphene oxide (GO). We achieve highly precise control of the placement, thickness, and length of the GO films coated on integrated photonic devices by using a solution-based, transfer-free, and layer-by-layer GO coating method followed by photolithography and lift-off processes. The latter overcomes the layer transfer fabrication limitations of 2D materials and represent a significant advance towards manufacturing integrated photonic devices incorporated with 2D materials. We measure the performance of the waveguide polarizer for different GO film thicknesses and lengths versus polarization, wavelength, and power, achieving a very high polarization dependent loss (PDL) of ∼ 53.8 dB. For GOcoated integrated MRRs, we achieve an 8.3-dB polarization extinction ratio between the TE and TM resonances, with the extracted propagation loss showing good agreement with the waveguide results. Furthermore, we present layer-by-layer characterization of the linear optical properties of 2D layered GO films, including detailed measurements that conclusively determine the material loss anisotropy of the GO films as well as the relative contribution of film loss anisotropy versus polarization-dependent mode overlap, to the device performance. These results offer interesting physical insights and trends of the layered GO films from monolayer to quasi bulk like behavior and confirm the high-performance of integrated polarization selective devices incorporated with GO films.

© 2020 SPIE.

Number of references:40

Main heading:Optical films

Controlled terms:Anisotropy - Graphene - Liquid crystal displays - Liquid crystals - Monolayers - Optical instruments - Optical properties - Optical resonators - Photonic devices - Polarization - Waveguides

Uncontrolled terms:Coherent optical detection - Integrated photonic devices - Integrated waveguides - Linear optical properties - Polarization dependent loss - Polarization extinction ratio - Polarization-selective devices - Relative contribution

Classification code:714.3 Waveguides - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally - 931.2 Physical Properties of Gases, Liquids and Solids - 941.3 Optical Instruments

Numerical data indexing:Decibel 5.38e+01dB, Decibel 8.30e+00dB

DOI:10.1117/12.2544584

Funding details: Number: DP150102972,DP150104327, Acronym: -, Sponsor: -;Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: -, Acronym: -, Sponsor: Canada Research Chairs;Number: 074-U 01, Acronym: -, Sponsor: Government Council on Grants, Russian Federation;

Funding text:This work was supported by the Australian Research Council Discovery Projects Programs (No. DP150102972 and DP150104327) and the Swinburne ECR-SUPRA program. We also acknowledge the Swinburne Nano Lab for the support in device fabrication and characterization. RM acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec, and by the Canada Research Chair Program. He also acknowledges additional support by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program (grant 074-U 01) and by the 1000 Talents Sichuan Program in China.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20203509117978

Title:Overcoming low-power limitations on optical frequency combs using a micro-ring resonator

Authors:Corcoran, Bill (1); Prayoonyong, Chawaphon (1); Boes, Andreas (2); Xu, Xingyuan (3); Tan, Mengxi (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6, 7); Mitchell, Arnan (2); Moss, David J. (3)

Author affiliation:(1) Dept. Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3001, Australia; (3) Centre for Micro-Photonics, Swinburne University Hawthorne, VIC; 3122, Australia; (4) Dept. Physcis and Material Science, City University of Hong Kong, Tat Chee Ave, Hong Kong; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (6) INRS, EMT, Varennes; QC; J3X 1S2, Canada; (7) ITMO University, St. Petersburg, Russia

Corresponding author:Corcoran, Bill(bill.corcoran@monash.edu)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Volume:Part F174-OFC 2020

Part number:1 of 1

Issue title:Optical Fiber Communication Conference, OFC 2020

Issue date:2020

Publication year:2020

Report number:OFC-2020-T4G.5

Language:English

ISBN-13:9781943580712

Document type:Conference article (CA)

Conference name:Optical Fiber Communication Conference, OFC 2020

Conference date:March 8, 2017 - March 12, 2017

Conference location:San Diego, CA, United states

Conference code:142578

Publisher:OSA - The Optical Society

Abstract:We show that filtering of an optical frequency comb with a high quality-factor ring resonator enables the use of amplified low power combs as a multi-wavelength source. This approach improves effective source OSNR by 10 dB.

OFC 2020 © OSA 2020 © 2020 The Author(s)

Number of references:10

Main heading:Optical fiber communication

Controlled terms:Natural frequencies - Optical fibers - Optical materials - Optical resonators

Uncontrolled terms:High quality factors - Low Power - Microring resonator - Multi-wavelength source - Optical frequency combs - Ring resonator

Classification code:717.1 Optical Communication Systems - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Decibel 1.00e+01dB

DOI:10.1364/OFC.2020.T4G.5

Funding details: Number: DP190100992, Acronym: ARC, Sponsor: Australian Research Council;

Funding text:We thank Keysight for the loan of the UXR scope. Funding: ARC through DP190102773 & DP190100992.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205209669508

Title:Laser Cavity Solitons and Turing Patterns in Microresonator Filtered Lasers

Authors:Pasquazi, Alessia (1); Rowley, Maxwell (1); Hazard, Pierre-Henry (1); Bao, Hualong (1); Olivieri, Luana (1); Cutrona, Antonio (1); Gongora, Juan Sebastian Totero (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4); Moss, David J. (5); Oppo, Gian-Luca (6); Peccianti, Marco (1)

Author affiliation:(1) University of Sussex, Emergent Photonics (EPic) Lab, Dept. of Physics and Astronomy, Brighton; BN1 9QH, United Kingdom; (2) City University of Hong Kong, Hong Kong, Hong Kong; (3) Chinese Academy of Science, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (4) INRS-EMT, Varennes; QC, Canada; (5) Swinburne University of Technology, Centre for Microphotonics, Hawthorn, Australia; (6) University of Strathclyde, Supa and Department of Physics, Glasgow, United Kingdom

Source title:2020 IEEE Photonics Conference, IPC 2020 - Proceedings

Abbreviated source title:IEEE Photonics Conf., IPC - Proc.

Part number:1 of 1

Issue title:2020 IEEE Photonics Conference, IPC 2020 - Proceedings

Issue date:September 2020

Publication year:2020

Article number:9252327

Language:English

ISBN-13:9781728158914

Document type:Conference article (CA)

Conference name:2020 IEEE Photonics Conference, IPC 2020

Conference date:September 28, 2020 - October 1, 2020

Conference location:Virtual, Vancouver, BC, Canada

Conference code:164977

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We summarise our results on the generation of temporal laser cavity-solitons and Turing patterns in a system comprising an optical micro-cavity nested in a fibre laser. We will discuss the experiments at the light of out theoretical model, commenting on their potential.

© 2020 IEEE.

Number of references:5

DOI:10.1109/IPC47351.2020.9252327

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205209685521

Title:An Automatic Emergency Braking Model considering Driver's Intention Recognition of the Front Vehicle????(Open Access)

Authors:Yang, Wei (1); Liu, Jiajun (1); Zhou, Kaixia (1); Zhang, Zhiwei (1); Qu, Xiaolei (2, 3)

Author affiliation:(1) School of Automobile, Chang'an University, Xi'an; 710064, China; (2) School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing; 100083, China; (3) Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing; 100083, China

Corresponding author:Yang, Wei(yw@chd.edu.cn)

Source title:Journal of Advanced Transportation

Abbreviated source title:J Adv Transp

Volume:2020

Issue date:2020

Publication year:2020

Article number:5172305

Language:English

ISSN:01976729

E-ISSN:20423195

CODEN:JATRDC

Document type:Journal article (JA)

Publisher:Hindawi Limited

Abstract:Driver's intention of the front vehicle plays an important role in the automatic emergency braking (AEB) system. If the front vehicle brakes suddenly, there is potential collision risk for following vehicle. Therefore, we propose a driver's intention recognition model for the front vehicle, which is based on the backpropagation (BP) neural network and hidden Markov model (HMM). The brake pedal, accelerator pedal, and vehicle speed data are used as the input of the proposed BP-HMM model to recognize the driver's intention, which includes uniform driving, normal braking, and emergency braking. According to the recognized driver's intention transmitted by Internet of vehicles, an AEB model for the following vehicle is proposed, which can dynamically change the critical braking distance under different driving conditions to avoid rear-end collision. In order to verify the performance of the proposed models, we conducted driver's intention recognition and AEB simulation tests in the cosimulation environment of Simulink and PreScan. The simulation test results show that the average recognition accuracy of the proposed BP-HMM model was 98%, which was better than that of the BP and HMM models. In the Car to Car Rear moving (CCRm) and Car to Car Rear braking (CCRb) tests, the minimum relative distance between the following vehicle and the front vehicle was within the range of 1.5 m-2.7 m and 2.63 m-5.28 m, respectively. The proposed AEB model has better collision avoidance performance than the traditional AEB model and can adapt to individual drivers.

© 2020 Wei Yang et al.

Number of references:43

Main heading:Vehicles

Controlled terms:Backpropagation - Brakes - Hidden Markov models - Rubidium compounds - Vehicle to vehicle communications

Uncontrolled terms:Accelerator pedals - Back-propagation neural networks - Driving conditions - Following vehicle - Intention recognition - Rear-end collisions - Recognition accuracy - Relative distances

Classification code:602 Mechanical Drives and Transmissions - 716 Telecommunication; Radar, Radio and Television - 723.4 Artificial Intelligence - 922 Statistical Methods

Numerical data indexing:Percentage 9.80e+01%, Size 1.50e+00m to 2.70e+00m, Size 2.63e+00m to 5.28e+00m

DOI:10.1155/2020/5172305

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20205209687877

Title:On the efficacy of soliton crystal micro-combs as highlyparallel local oscillators for high-bandwidth systems

Authors:Prayoonyong, Chawaphon (1); Tan, Mengxi (2); Xu, Xingyuan (2); Boes, Andreas (3); Nguyen, Thach (3); S.T., Chu; B., Little; R., Morandotti; D.J., Moss; B., Corcoran

Author affiliation:(1) Monash University, Electro-Photonics Laboratory, Dept. Electrical and Computer Systems Engineering, Clayton; VIC; 3800, Australia; (2) Centre for Micro-Photonics, Swinburne University, Hawthorne; VIC; 3122, Australia; (3) Rmit University, School of Engineering, Melbourne; VIC; 3001, Australia; (4) Dept. Physcis and Material Science, City University of Hong Kong, Tat Chee Ave., Hong Kong, China; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (6) Inrs - Emt, Varennes; QC; J3X 1S2, Canada

Source title:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020 - Proceedings

Abbreviated source title:Conf. Lasers Electro-Opt. Pac. Rim, CLEO-PR - Proc.

Part number:1 of 1

Issue title:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020 - Proceedings

Issue date:August 2020

Publication year:2020

Article number:9256124

Language:English

ISBN-13:9780646825045

Document type:Conference article (CA)

Conference name:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020

Conference date:August 3, 2020 - August 5, 2020

Conference location:Sydney, NSW, Australia

Conference code:165122

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We investigate the performance of soliton crystal micro-comb lines as local oscillators, by emulating degradation through noise loading. We show a 0.3 b/symbol penalty for the minimum comb OSNR on a 64QAM signal.

© 2020 IEEE.

Number of references:10

Main heading:Crystal oscillators

Controlled terms:Crystals - Solitons

Uncontrolled terms:High bandwidth - Local oscillators

Classification code:713.2 Oscillators - 933.1 Crystalline Solids

DOI:10.1364/CLEOPR.2020.C6F_1

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204009262054

Title:Time-of-Flight Depth-Resolved Imaging with Heralded Photon Source Illumination

Authors:Ren, Ximing (1, 3); Frick, Stefan (2, 4); McMillan, Alex (2); Chen, Songmao (1, 5); Halimi, Abderrahim (1); Connolly, Peter W. R. (1); Joshi, Siddarth K. (2); McLaughlin, Stephen (1); Rarity, John G. (2); Matthews, Jonathan C. F. (2); Buller, Gerald S. (1)

Author affiliation:(1) School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh; EH14 4AS, United Kingdom; (2) Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory and Department of Electrical and Electronic Engineering, University of Bristol, Bristol; BS8 1FD, United Kingdom; (3) Micron School of Materials Science and Engineering, Boise State University, Boise, United States; (4) Department of Experimental Physics, University of Innsbruck, Innsbruck, Austria; (5) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, China

Source title:Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS

Abbreviated source title:Conf Proc Laser Electr Optic Soc Annu Meet CLEO

Volume:2020-May

Part number:1 of 1

Issue title:2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings

Issue date:May 2020

Publication year:2020

Article number:9193152

Language:English

ISSN:10928081

CODEN:CPLSE4

ISBN-13:9781943580767

Document type:Conference article (CA)

Conference name:2020 Conference on Lasers and Electro-Optics, CLEO 2020

Conference date:May 10, 2020 - May 15, 2020

Conference location:San Jose, CA, United states

Conference code:163003

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We demonstrate 3D time-of-flight imaging from a scattering target illuminated with a heralded single photon source. Our image reconstruction algorithm achieves millimeter depth resolution with only 0.3 average detected photons per image pixel.

© 2020 OSA.

Number of references:4

Main heading:Image reconstruction

Controlled terms:Elementary particle sources - Light - Particle beams - Photons

Uncontrolled terms:Depth resolution - Depth resolved imaging - Detected photons - Heralded photon sources - Heralded single photon sources - Image reconstruction algorithm - Time of flight - Time-of-flight imaging

Classification code:741.1 Light/Optics - 931.3 Atomic and Molecular Physics - 932.1 High Energy Physics

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210609881374

Title:Ultra-high bandwidth optical data transmission with a microcomb

Authors:Tan, Mengxi (1); Corcoran, Bill (2); Xu, Xingyuan (1, 2); Wu, Jiayang (1); Boes, Andreas (3); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6); Mitchell, Arnan (3); Moss, David J. (1)

Author affiliation:(1) Swinburne University of Technology, Optical Sciences Centre, Hawthorn; VIC; 3122, Australia; (2) Monash University, Dept. of Electrical and Computer Systems Engineering, Clayton; VIC; 3800, Australia; (3) Rmit University, School of Engineering, Melbourne; VIC; 3001, Australia; (4) City University of Hong Kong, Department of Physics and Material Science, Hong Kong, Hong Kong; (5) Precision Mechanics of Cas, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (6) Matériaux et Télécommunications, INRS-Énergie, Varennes; QC; J3X 1S2, Canada

Source title:2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings

Abbreviated source title:Int. Top. Meet. Microw. Photonics, MWP - Proc.

Part number:1 of 1

Issue title:2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings

Issue date:November 24, 2020

Publication year:2020

Pages:78-82

Article number:9314476

Language:English

ISBN-13:9784885523311

Document type:Conference article (CA)

Conference name:2020 International Topical Meeting on Microwave Photonics, MWP 2020

Conference date:November 24, 2020 - November 26, 2020

Conference location:Virtual, Matsue, Japan

Conference code:166501

Sponsor:Support Center for Advanced Telecommunications Technology Research, Foundation (SCAT); The Electronics Society of The Institute of Electronics, Information and Communication Engineers (IEICE); The Murata Science Foundation

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We report record data transmission over standard optical fibre using a single integrated chip source. We demonstrate a line rate of 44.2 Terabits per second (Tb/s) using the telecommunications C-band at 1550nm with a spectral efficiency - a critically important performance metric - of 10.4 bits/s/Hz. We use a new and powerful class of micro-comb called soliton crystals that exhibit robust operation and stable generation as well as a high intrinsic efficiency that, together with an extremely low spacing of 48.9 GHz enables a very high coherent data modulation format of 64 QAM. We demonstrate error free transmission over 75 km of standard optical fibre in the laboratory and a field trial over an installed metropolitan optical fiber network. This work demonstrates the capability of optical micro-combs to out-perform other approaches in demanding and practical optical communications networks.

© 2020 IEICE.

Number of references:81

Main heading:Light transmission

Controlled terms:Data transfer - Efficiency - Optical communication - Optical fibers

Uncontrolled terms:Communications networks - Error free transmission - Intrinsic efficiency - Optical data transmission - Optical fiber networks - Performance metrices - Spectral efficiencies - Ultra-high bandwidth

Classification code:717.1 Optical Communication Systems - 741.1 Light/Optics - 741.1.2 Fiber Optics - 913.1 Production Engineering

Numerical data indexing:Frequency 4.89e+10Hz, Size 1.55e-06m, Size 7.50e+04m, Spectral_Efficiency 1.04e+01bit/s/Hz

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202208712412

Title:Overcoming Low-Power Limitations on Optical Frequency Combs using a Micro-Ring Resonator

Authors:Corcoran, Bill (1); Prayoonyong, Chawaphon (1); Boes, Andreas (2); Xu, Xingyuan (3); Tan, Mengxi (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6); Mitchell, Arnan (2); Moss, David J. (3)

Author affiliation:(1) Dept. Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3001, Australia; (3) Centre for Micro-Photonics, Swinburne University, Hawthorne; VIC; 3122, Australia; (4) Dept. Physcis and Material Science, City University of Hong Kong, Tat Chee Ave, Hong Kong, Hong Kong; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (6) INRS - EMT, Varennes; QC; J3X 1S2, Canada

Source title:2020 Optical Fiber Communications Conference and Exhibition, OFC 2020 - Proceedings

Abbreviated source title:Opt. Fiber Commun. Conf. Exhib., OFC - Proc.

Part number:1 of 1

Issue title:2020 Optical Fiber Communications Conference and Exhibition, OFC 2020 - Proceedings

Issue date:March 2020

Publication year:2020

Article number:9083014

Language:English

ISBN-13:9781943580712

Document type:Conference article (CA)

Conference name:2020 Optical Fiber Communications Conference and Exhibition, OFC 2020

Conference date:March 8, 2020 - March 12, 2020

Conference location:San Diego, CA, United states

Conference code:159660

Sponsor:Acacia; Acphotonics; Alibaba Group; Ciena; Cisco; et al.

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We show that filtering of an optical frequency comb with a high quality-factor ring resonator enables the use of amplified low power combs as a multi-wavelength source. This approach improves effective source OSNR by 10 dB.

© 2020 OSA.

Number of references:10

Main heading:Optical fiber communication

Controlled terms:Natural frequencies - Optical fibers - Optical materials - Optical resonators

Uncontrolled terms:High quality factors - Low Power - Microring resonator - Multi-wavelength source - Optical frequency combs - Ring resonator

Classification code:717.1 Optical Communication Systems - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Decibel 1.00e+01dB

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204809536297

Title:BCG signal processing based on advanced LMS filter for optical fiber monitor

Authors:Liu, Yifan (1); Xu, Wei (2, 3); Yu, Changyuan (1)

Author affiliation:(1) Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong; (2) University of Chinese Academy of Science, China; (3) Xi'an Institute of Optical and Precision Mechanics, Chinese Academy of Science, China

Corresponding author:Yu, Changyuan

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11547

Part number:1 of 1

Issue title:Optoelectronic Devices and Integration IX

Issue date:2020

Publication year:2020

Article number:115471P

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639096

Document type:Conference article (CA)

Conference name:Optoelectronic Devices and Integration IX 2020

Conference date:October 12, 2020 - October 16, 2020

Conference location:Virtual, Online, China

Conference code:164667

Sponsor:Chinese Optical Society (COS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Heart Rate Variability (HRV) analysis is an important tool for health monitoring. A non-invasive smart health monitoring system based on optical fiber interferometer can get HRV information from the Ballistocardiogram (BCG) signal. For some patients, the HRV can hardly be calculated due to the interferences from breath and other vibrations. In this research, we obtain a stable and high-sensitive BCG signal by a Mach-Zehnder interferometer (MZI) based sensor. In order to reduce the noise in signal, we introduce an advanced least mean squares (LMS) adaptive filter into the procedure. We use the signal processed by a bandpass filter as the adesired signal' to deal with the raw data and obtain a preferable output for HRV calculation.

© 2020 SPIE.

Number of references:15

Main heading:Bandpass filters

Controlled terms:Adaptive filtering - Adaptive filters - Integrated optoelectronics - Interferometers - Optical fibers - Optical signal processing

Uncontrolled terms:A-stable - Health monitoring - Health monitoring system - Heart rate variability - Least mean square (LMS) - Machzehnder interferometers (MZI) - Optical fiber interferometers

Classification code:703.2 Electric Filters - 741.1.2 Fiber Optics - 941.3 Optical Instruments

DOI:10.1117/12.2575310

Funding details: Number: 1-ZVHA, Acronym: -, Sponsor: -;

Funding text:Compared (a) to (b), the output is disordered and the baseline is not return to zero. Therefore, ‘desired respond’ chosen can influenceetahcpacitfoy rf.T hielwrtiaesngalro cpessedybaH2z toH7zabndpass filter ismorepreferable. 4.Conclusion This research uses an LMS filter to process the BCG signal. A raw signal collected from MZI sensor preprocessed by a 2Hz to 7Hz bandpass filter is chosen to be the ‘desired respond’. By the processing of LMS filter,t ehsmall body vibration can be limited and strong vibration will be enlarged compared with the signal processed by a 2Hz to 7Hz bandpass filter only.Meanwhile,the signalprocessed by a 2Hz to 7Hz bandpassfilteris aebtr ‘tdeseired respond’ fortheLMSfilter. 5.Acknowledgement This work was supported by Grant 15211317 from HK RGC GRF and 1-ZVHA from HK PolyU.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204509465754

Title:Enhanced four-wave mixing in micro-ring resonators integrated with layered graphene oxide films

Authors:Wu, Jiayang (1); Yang, Yunyi (1); Zhang, Yuning (1); Qu, Yang (1); Jia, Linnan (1); Xu, Xingyuan (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4, 5); Jia, Baohua (1); Moss, David J. (1)

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) Department of Physics, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong; (3) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics, Chinese Academy of Science, Xi'an, China; (4) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (5) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Corresponding author:Moss, David J.(dmoss@swin.edu.au)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Volume:Part F183-CLEO-SI 2020

Part number:1 of 1

Issue title:CLEO: Science and Innovations, CLEO_SI 2020

Issue date:2020

Publication year:2020

Article number:SM4L.5

Language:English

ISBN-13:9781943580767

Document type:Conference article (CA)

Conference name:CLEO: Science and Innovations, CLEO_SI 2020

Conference date:May 10, 2020 - May 15, 2020

Conference location:Washington, DC, United states

Conference code:143838

Publisher:OSA - The Optical Society

Abstract:We experimentally demonstrate enhanced four-wave mixing in micro-ring resonators (MRRs) integrated with graphene oxide films. We achieve up to ~7.6-dB enhancement in conversion efficiency for a uniformly coated MRR and ~10.3-dB for a patterned device.

© OSA 2020 © 2020 The Author (s)

Number of references:15

Main heading:Oxide films

Controlled terms:Four wave mixing - Graphene - Optical resonators

Uncontrolled terms:Microring resonator

Classification code:741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally

DOI:10.1364/CLEO_SI.2020.SM4L.5

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203008977096

Title:A moving vehicle tracking algorithm based on deep learning

Authors:Qiu, Shi (1, 2, 3); Cheng, Keyang (4); Cui, Lei (5); Zhou, Dongmei (6); Guo, Qiang (7)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China; (2) Shandong University, Jinan, China; (3) Shandong Aipu Electric Equipment Co., Ltd., Jinan, China; (4) School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang, China; (5) School of Information Science and Technology, Northwest University, Xi’an, China; (6) College of Information Science and Technology, Chengdu University of Technology, Chengdu, China; (7) School of Computer Science and Technology, Shandong University of Finance and Economics, Jinan, China

Corresponding author:Cheng, Keyang(kycheng@ujs.edu.cn)

Source title:Journal of Ambient Intelligence and Humanized Computing

Abbreviated source title:J. Ambient Intell. Humanized Comput.

Issue date:2020

Publication year:2020

Language:English

ISSN:18685137

E-ISSN:18685145

Document type:Article in Press

Publisher:Springer

Abstract:It is difficult to track the moving vehicle due to various factors including complex environment, changes of illumination and scale. A moving vehicle tracking algorithm based on deep learning is proposed in this paper. First of all, traditional GMM algorithm is improved to reduce the error judgment probability of pixel state. Then, a sparse DAE neural network feature learning framework is proposed to ensure efficient extraction of vehicle features and reduce feature redundancy. Finally, the vehicle is tracked in its area. The experimental results show that the CM of proposed algorithm achieves 0.85 and has strong robustness.

© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

Number of references:38

Main heading:Deep learning

Controlled terms:Learning algorithms - Tracking (position) - Vehicles

Uncontrolled terms:Complex environments - Feature redundancy - Moving vehicle tracking - Moving vehicles - Neural network features - Strong robustness

DOI:10.1007/s12652-020-02352-w

Funding details: Number: 61873145, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019KJN045, Acronym: -, Sponsor: Excellent Young Talents Fund Program of Higher Education Institutions of Anhui Province;Number: ZR2017JL029, Acronym: -, Sponsor: Natural Science Foundation of Shandong Province;Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;

Funding text:This work is supported by the Open Project Program of the State Key Lab of CAD&CG (Grant No. A2026), Zhejiang University. National Natural Science Foundation of China (Grant No. 61873145), Natural Science Foundation of Shandong Province (Grant No. ZR2017JL029), and Science and Technology Innovation Program for Distributed Young Talents of Shandong Province Higher Education Institutions (Grant No. 2019KJN045).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203108991289

Title:New Insight Into Lunar Regolith-Forming Processes by the Lunar Rover Yutu-2

Authors:Lin, Honglei (1); Lin, Yangting (1); Yang, Wei (1); He, Zhiping (2); Hu, Sen (1); Wei, Yong (1); Xu, Rui (2); Zhang, Jinhai (1); Liu, Xiaohui (3); Yang, Jianfeng (4); Xing, Yan (5); Yu, Chengwu (5); Zou, Yongliao (6)

Author affiliation:(1) Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; (2) Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, China; (3) Beijing Aerospace Control Center, Beijing, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (5) Beijing institute of control engineering, Beijing, China; (6) State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China

Corresponding author:Lin, Yangting(linyt@mail.iggcas.ac.cn)

Source title:Geophysical Research Letters

Abbreviated source title:Geophys. Res. Lett.

Volume:47

Issue:14

Issue date:July 28, 2020

Publication year:2020

Article number:e2020GL087949

Language:English

ISSN:00948276

E-ISSN:19448007

CODEN:GPRLAJ

Document type:Journal article (JA)

Publisher:Blackwell Publishing Ltd

Abstract:The Yutu-2 rover of the Chang'E-4 spacecraft observed many meter-sized shallow pits fully covered with small fragments, distinct from the typical rock-free impact craters with comparable sizes in the landing area. The unique morphology of the pits and the visible and near-infrared spectra of the fragments suggest that the fragments are broken pieces of impact melt-conglutinated regolith breccia projectiles, which were excavated from preexisting craters. The rareness of rock on the landing area surface suggests that the preexisting craters were probably small in size (e.g., <60 m in diameter), not large enough to penetrate the thick regolith (~12 m) and to excavate the beneath rock breccia and/or bedrock. The presence of the impact melts was confirmed by the glass-like spectra of some fragments with unusually high albedo and blue-green tint in the centers of the pits. These observations reveal the gardening and consolidating processes on the Moon.

©2020. American Geophysical Union. All Rights Reserved.

Number of references:42

Main heading:Spacecraft landing

Controlled terms:Infrared devices - Lunar surface analysis - Morphology - Near infrared spectroscopy - Rocks

Uncontrolled terms:Free impact - Impact melt - Landing area - Lunar regolith - Lunar rovers - Unique morphologies - Visible and near infrared

Classification code:655.1 Spacecraft, General - 951 Materials Science

DOI:10.1029/2020GL087949

Funding details: Number: Z181100002918003, Acronym: -, Sponsor: Beijing Municipal Science and Technology Commission;Number: QYZDJ-SSW-DQC001, Acronym: -, Sponsor: -;Number: IGGCAS-201905, Acronym: -, Sponsor: -;Number: 41430105,41525016,41902318,41490631, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:The Chang'E-4 mission was carried out by the Chinese Lunar Exploration Program, and the scientific data are provided by China National Space Administration. The authors are grateful to the Editor and James Head and Katherine Joy and an anonymous reviewer for their constructive reviews. This work was supported by NSFC (41902318, 41430105, 41490631, 41525016), the Beijing Municipal Science and Technology Commission (Z181100002918003) and Key Research Program of Frontier Sciences, CAS (QYZDJ-SSW-DQC001). Honglei Lin and Sen Hu also acknowledge the support of the Key Research Program of the Institute of Geology and Geophysics, CAS (IGGCAS-201905).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204509460510

Title:Time-of-flight depth-resolved imaging with heralded photon source illumination????(Open Access)

Authors:Ren, Ximing (1, 3); Frick, Stefan (2, 4); McMillan, Alex (2); Chen, Songmao (1, 5); Halimi, Abderrahim (1); Connolly, Peter W.R. (1); Joshi, Siddarth K. (2); McLaughlin, Stephen (1); Rarity, John G. (2); Matthews, Jonathan C.F. (2); Buller, Gerald S. (1)

Author affiliation:(1) School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh; EH14 4AS, United Kingdom; (2) Quantum Engineering Technology Labs, H. H. Wills Physics Laboratory, Department of Electrical and Electronic Engineering, University of Bristol, Bristol; BS8 1FD, United Kingdom; (3) Micron School of Materials Science and Engineering, Boise State University, Boise, United States; (4) Department of Experimental Physics, University of Innsbruck, Innsbruck, Austria; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, China

Corresponding author:Ren, Ximing(Ximing.Ren@outlook.com)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Volume:Part F181-CLEO-AT 2020

Part number:1 of 1

Issue title:CLEO: Applications and Technology, CLEO_AT 2020

Issue date:2020

Publication year:2020

Article number:AM3K.6

Language:English

ISBN-13:9781557528209

Document type:Conference article (CA)

Conference name:CLEO: Applications and Technology, CLEO_AT 2020

Conference date:May 10, 2020 - May 15, 2020

Conference location:Washington, DC, United states

Conference code:143818

Publisher:OSA - The Optical Society

Abstract:We demonstrate 3D time-of-flight imaging from a scattering target illuminated with a heralded single photon source. Our image reconstruction algorithm achieves millimeter depth resolution with only 0.3 average detected photons per image pixel.

CLEO 2020 © OSA 2020 © 2020 The Author(s).

Number of references:4

Main heading:Image reconstruction

Controlled terms:Elementary particle sources - Particle beams - Photons

Uncontrolled terms:Depth resolution - Depth resolved imaging - Detected photons - Heralded photon sources - Heralded single photon sources - Image reconstruction algorithm - Time of flight - Time-of-flight imaging

Classification code:931.3 Atomic and Molecular Physics - 932.1 High Energy Physics

DOI:10.1364/CLEO_AT.2020.AM3K.6

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20210309778768

Title:Status of the follow-up X-ray telescope onboard the Einstein probe satellite

Authors:Chen, Yong (1); Cui, WeiWei (1); Han, DaWei (1); Wang, Juan (1); Yang, YangJi (1); Wang, YuSa (1); Li, Wei (1); Ma, Jia (1); Xu, Yupeng (1); Lu, FangJun (1); Chen, HouLei (2); Tang, QingJun (2); Yuan, Weimin (3); Friedrich, Peter (4); Meidinger, Norbert (4); Keil, Isabell (4); Burwitz, Vadim (4); Eder, Josef (4); Hartmann, Katinka (4); Nandra, Kirpal (4); Keereman, Arnoud (5); Santovincenzo, Andrea (5); Vernani, Dervis (6); Bianucci, Giovanni (6); Valsecchi, Giuseppe (6); Wang, Bo (7); Wang, LangPing (7); Wang, DianLong (7); Li, Duo (7); Sheng, LiZhi (8); Qiang, PengFei (8); Shi, RongRong (9); Chao, XiangYu (9); Song, ZeYu (1); Zhang, Ziliang (1); Huo, Jia (1); Wang, Hao (1); Cong, Min (1); Yang, XiongTao (1); Hou, Dongjie (1); Zhao, XiaoFan (1); Zhao, ZiJian (1); Chen, TianXiang (1); Li, MaoShun (1); Zhang, Tong (1); Luo, LaiDan (1); Xu, JingJing (1); Li, Gang (1); Zhang, Qian (1); Bi, XiYan (1); Zhu, YuXuan (1, 10); Yu, Nian (1); Chen, Can (1); Lv, ZhongHua (1); Lu, Bing (1); Zhang, JiaWei (1)

Author affiliation:(1) Institute of High Energy Physics, CAS, Beijing, China; (2) Technical Institute of Physics and Chemistry, CAS, Beijing, China; (3) National Astronomical Observatories, CAS, Beijing, China; (4) Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse 1, Garching; 85748, Germany; (5) European Space Agency, ESTEC, Keplerlaan 1, Noordwijk; NL-2200 AG, Netherlands; (6) Media Lario S.r.l., LocalitàPascolo, Bosisio Parini (LC); 23842, Italy; (7) Harbin Institute of Technology, Harbin, China; (8) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (9) Innovation Academy for Microsatellites, Shanghai, China; (10) Jilin University, Changchun, China

Corresponding author:Chen, Yong

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11444

Part number:1 of 1

Issue title:Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

Issue date:2020

Publication year:2020

Article number:114445B

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636750

Document type:Conference article (CA)

Conference name:Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

Conference date:December 14, 2020 - December 18, 2020

Conference location:Virtual, Online, CA, United states

Conference code:166330

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:The Einstein Probe (EP) is an X-ray astronomical mission mainly devoting to time-domain astronomy. There are two main scientific payloads onboard EP, the Wide Field X-ray Telescope (WXT) based on the lobster eye optics and the Follow-up X-ray Telescope (FXT). FXT contains two Wolter-1 mirrors with a pnCCD detector on each focus. The total effective area is about 600 cm2 and the energy range is 0.3-10 keV. The pnCCD detector cooled by a pulse tube cooler enables high-resolution spectroscopy and imaging combined with excellent time resolution. It will also have several working modes with time resolution ranging from tens of microseconds to 50 milliseconds. Currently, the FXT is in its qualification model phase. The mirror assemblies (STM and TCM) as well as the pnCCD EM module have been manufactured and tested.

© 2020 SPIE

Number of references:7

Main heading:Gamma rays

Controlled terms:Cooling systems - Mirrors - Probes - Space telescopes - Spacecraft equipment - Spectroscopic analysis - X rays

Uncontrolled terms:Astronomical mission - High-resolution spectroscopy - Lobster-eye optics - pnCCD detectors - Pulse tube coolers - Qualification model - Scientific payloads - X ray telescope

Classification code:655.1 Spacecraft, General - 741.3 Optical Devices and Systems - 801 Chemistry - 932.1 High Energy Physics

Numerical data indexing:Area 6.00e-02m2, Electron_Volt 3.00e+02eV to 1.00e+04eV, Time 5.00e-02s

DOI:10.1117/12.2562311

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203209011122

Title:Atmospheric correction of geostationary satellite ocean color data under high solar zenith angles in open oceans

Authors:Li, Hao (1, 2, 3); He, Xianqiang (1, 2, 3); Bai, Yan (1, 2, 3); Shanmugam, Palanisamy (4); Park, Young-Je (5); Liu, Jia (6); Zhu, Qiankun (1, 2); Gong, Fang (1, 2); Wang, Difeng (1, 2); Huang, Haiqing (1, 2)

Author affiliation:(1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) Ocean College, Zhejiang University, Zhoushan, China; (4) Department of Ocean Engineering, IIT Madras, Chennai, India; (5) Korea Ocean Satellite Center, Korea Institute of Ocean Science&Technology, Busan, Korea, Republic of; (6) Key Laboratory of Spectral Imaging Technology of CAS, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China

Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)

Source title:Remote Sensing of Environment

Abbreviated source title:Remote Sens. Environ.

Volume:249

Issue date:November 2020

Publication year:2020

Article number:112022

Language:English

ISSN:00344257

CODEN:RSEEA7

Document type:Journal article (JA)

Publisher:Elsevier Inc.

Abstract:With a revisit time of 1 h, spatial resolution of 500 m, and high radiometric sensitivity, the Geostationary Ocean Color Imager (GOCI) is widely used to monitor diurnal dynamics of oceanic phenomena. However, atmospheric correction (AC) of GOCI data with high solar zenith angle (>70°) is still a challenge for traditional algorithms. Here, we propose a novel neural network (NN) AC algorithm for GOCI data under high solar zenith angles. Unlike traditional NN AC algorithms trained by radiative transfer-simulated dataset, our new AC algorithm was trained by a large number of matchups between GOCI-observed Rayleigh-corrected radiance in the morning and evening and GOCI-retrieved high-quality noontime remote-sensing reflectance (Rrs). When validated using hourly GOCI data, the new NN AC algorithm yielded diurnally stable Rrs in open ocean waters from the morning to evening. Furthermore, when validated by in-situ data from three Aerosol Robotic Network-Ocean Color (AERONET-OC) stations (Socheongcho, Gageocho and Ieodo), the GOCI-retrieved Rrs at visible bands obtained using the new AC algorithm agreed well with the in-situ values, even under high solar zenith angles. Practical application of the new algorithm was further examined using diurnal GOCI observation data acquired in clear open ocean waters. Results showed that the new algorithm successfully retrieved Rrs for the morning and evening GOCI data. Moreover, the amount of Rrs data retrieved by the new algorithm was much higher than that retrieved by the standard AC algorithm in SeaDAS. Our proposed NN AC algorithm can not only be applied to process GOCI data acquired in the morning and evening, but also has the potential to be applied to process polar-orbiting satellite ocean color data at high-latitude ocean that also include satellite observation with high solar zenith angles.

© 2020 Elsevier Inc.

Number of references:42

Main heading:Oceanography

Controlled terms:Color - Geostationary satellites - Large dataset - Open Data - Orbits - Remote sensing

Uncontrolled terms:Aerosol robotic networks - Atmospheric corrections - Novel neural network - Polar-orbiting satellites - Radiometric sensitivity - Remote-sensing reflectance - Satellite observations - Solar zenith angle

Classification code:471.1 Oceanography, General - 655.2 Satellites - 741.1 Light/Optics

Numerical data indexing:Size 5.00e+02m, Time 3.60e+03s

DOI:10.1016/j.rse.2020.112022

Funding details: Number: QNHX1932, Acronym: SOED, Sponsor: State Key Laboratory of Satellite Ocean Environment Dynamics;Number: 2017YFA0603003, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: GASI-02-PAC-YGST2-01, Acronym: -, Sponsor: National Program on Global Change and Air-Sea Interaction;Number: GML2019ZD0602, Acronym: -, Sponsor: -;Number: 41706207, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:We thank the KIOST/KOSC for providing the GOCI data. We also thank Prof. Knut Stamnes and Dr. Yongzheng Fan from the Stevens Institute of Technology, USA for their comments on this work. We thank Prof. Young-Je Park, Prof. Jae-Seol Shim, Prof. Joo-Hyung Ryu, Prof. Hak-Yeol You and their staff for collecting the in situ Rrs data at three AERONET-OC sites (Ieodo, Socheongchoused and Gageocho), and the Aeronet-OC data used in this study was acquired from the project titled "Construction of Ocean Research Station and their Application Studies" funded by the Ministry of Oceans and Fisheries, Korea. This research was funded by the National Key Research and Development Program of China (Grant # 2017YFA0603003 ), the National Natural Science Foundation of China (Grants # 41825014 , # 41676172 , # 41676170 , # 41706207 and # 41621064 ), the Global Change and Air-Sea Interaction Project of China (Grants # GASI-02-SCS-YGST2-01 , # GASI-02-PAC-YGST2-01 and # GASI-02-IND-YGST2-01 ), the Project of State Key Laboratory of Satellite Ocean Environment Dynamics (Grant # QNHX1932 ), and the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ( GML2019ZD0602 ). We thank anonymous reviewers for their constructive comments.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210609881344

Title:Broadband photonic RF channelizer based on a Kerr soliton crystal microcomb

Authors:Tan, Mengxi (1); Xu, Xingyuan (1, 2); Wu, Jiayang (1); Boes, Andreas (3); Corcoran, Bill (2); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6); Mitchell, Arnan (3); Moss, David J. (1)

Author affiliation:(1) Swinburne University of Technology, Optical Sciences Centre, Hawthorn; VIC; 3122, Australia; (2) Dept. of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia; (3) School of Engineering, Rmit University, Melbourne; VIC; 3001, Australia; (4) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (5) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics of Cas, Xi'an, China; (6) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada

Source title:2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings

Abbreviated source title:Int. Top. Meet. Microw. Photonics, MWP - Proc.

Part number:1 of 1

Issue title:2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings

Issue date:November 24, 2020

Publication year:2020

Pages:9-13

Article number:9314605

Language:English

ISBN-13:9784885523311

Document type:Conference article (CA)

Conference name:2020 International Topical Meeting on Microwave Photonics, MWP 2020

Conference date:November 24, 2020 - November 26, 2020

Conference location:Virtual, Matsue, Japan

Conference code:166501

Sponsor:Support Center for Advanced Telecommunications Technology Research, Foundation (SCAT); The Electronics Society of The Institute of Electronics, Information and Communication Engineers (IEICE); The Murata Science Foundation

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We report a broadband RF channelizer with 92 channels using a 49 GHz soliton crystal microcomb with another high-Q MRR as a passive periodic filter with a resolution of 121.4 MHz. We achieve an instantaneous RF bandwidth of 8.08 GHz and 17.55 GHz via thermal tuning. Our approach is a significant step towards monolithically integrated photonic RF receivers with reduced complexity, size, and high performance for broadband analog signal processing and digital-compatible signal detection.

© 2020 IEICE.

Number of references:57

Main heading:Signal receivers

Controlled terms:Crystals - Signal processing - Solitons

Uncontrolled terms:Analog signal processing - Kerr solitons - Monolithically integrated - Periodic filters - Photonic RF channelizer - Reduced complexity - RF bandwidths - Thermal tuning

Classification code:716.1 Information Theory and Signal Processing - 933.1 Crystalline Solids

Numerical data indexing:Frequency 1.21e+08Hz, Frequency 1.76e+10Hz, Frequency 4.90e+10Hz, Frequency 8.08e+09Hz

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201008270542

Title:Geant4 simulation for the responses to X-rays and charged particles through the eXTP focusing mirrors

Authors:Qi, L.Q. (1); Li, G. (1); Xu, Y.P. (1); Zhang, J. (1); Yang, Y.J. (1); Sheng, L.Z. (5); Basso, S. (2); Campana, R. (3); Chen, Y. (1); De Rosa, A. (4); Pareschi, G. (2); Qiang, P.F. (5); Santangelo, A. (6); Sironi, G. (2); Song, L.M. (1); Spiga, D. (2); Tagliaferri, G. (2); Wang, J. (1); Wilms, J. (7); Zhang, Y. (1); Lu, F.J. (1)

Author affiliation:(1) Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China; (2) INAF-Brera Astronomical Observatory, Via E. Bianchi 46, Merate; 23807, Italy; (3) INAF/OAS, Via Gobetti 101, Bologna; I-40129, Italy; (4) INAF/IAPS, Institute for Space Astrophysics and Planetology, via Fosso del Cavaliere 100, Rome; 00133, Italy; (5) XIOPM, Xi'an Institute of Optics and Precision Mechanics, CAS, NO. 17 Xinxi Road, Xi'an, Shanxi, China; (6) Institut für Astronomie und Astrophysik Tübingen, Sand 1, Tübingen; 72076, Germany; (7) Remeis Observatory & ECAP, Universität Erlangen-Nürnberg, Sternwartstr. 7, Bamberg; 96049, Germany

Corresponding author:Qi, L.Q.(qilq@ihep.ac.cn)

Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abbreviated source title:Nucl Instrum Methods Phys Res Sect A

Volume:963

Issue date:21 May 2020

Publication year:2020

Article number:163702

Language:English

ISSN:01689002

CODEN:NIMAER

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:A geometrical and physical model of Wolter-I type mirrors has been implemented in Geant4 for the design of the enhanced X-ray Timing and Polarimetry observatory (eXTP). It can simultaneously simulate the mirror responses to X-rays and charged particles. A new geometry class G4Hyperboloid is created and verified, which allows an exact surface profile description of Wolter-I optics. A physics model for the interaction of X-rays and matter is implemented to effectively estimate the focusing performances with reasonable accuracy, including the effective area and the point spread function. Scattering models of charged particles at grazing incidence are discussed. The multiple scattering model provided by the latest Geant4 release can be used instead of the single scattering model with reasonable accuracy and CPU cost when the step size is properly constrained.

© 2020 Elsevier B.V.

Number of references:34

Main heading:X rays

Controlled terms:Charged particles - Mirrors - Optical transfer function

Uncontrolled terms:eXTP - Focusing performance - Geant4 - Grazing incidence - Multiple scattering models - Reasonable accuracy - Single-scattering model - X ray telescope

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 932.1 High Energy Physics

DOI:10.1016/j.nima.2020.163702

Funding details: Number: 2017-14-H, Acronym: -, Sponsor: -;Number: XDA15020501, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:We would like to thank the eXTP collaboration. We also acknowledge the support from the Strategic Priority Program on Space Science, China , the Chinese Academy of Sciences , Grant No. XDA15020501 and No. XDA15020503 , and the financial contribution from the agreement ASI-INAF, Italy no. 2017-14-H.O .

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200508112741

Title:A Forward Collision Warning System Using Driving Intention Recognition of the Front Vehicle and V2V Communication????(Open Access)

Authors:Yang, Wei (1); Wan, Bo (2); Qu, Xiaolei (3, 4)

Author affiliation:(1) School of Automobile, Chang'an University, Xi'an; 710064, China; (2) Cicada Canada Inc., Toronto; ON; L5V 1T7, Canada; (3) School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing; 100083, China; (4) Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing; 100083, China

Corresponding author:Qu, Xiaolei(quxiaolei@buaa.edu.cn)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:11268-11278

Article number:8949500

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:A forward collision warning (FCW) system is important for avoiding rear-end collisions. When the front vehicle slows down or the risk of rear-end collision increases, the FCW system sends a warning. However, if the warning is provided too late, the following vehicle may not have enough time to stop or slow down smoothly. Here, we propose a new FCW system that detects the driving intention of the front vehicle to provide earlier warning than previously used systems. The proposed FCW system consists of three steps. First, the driving intention of the front vehicle is determined by the driving intention recognition module. Second, the driving intention and other driving parameters of the front vehicle are transmitted to the following vehicle using vehicle-to-vehicle (V2V) communication. Finally, this information and the driving parameters of the following vehicle are used to determine the potential collision risk by the FCW module located in the second vehicle. To evaluate the proposed system, we conducted a simulation test based on PreScan (commercial software provided by TASS international) and actual road tests in various driving scenarios. The simulation test results demonstrated that the correct warning rate of the proposed system was 97.67%, which was 6.34% higher than that of the system with a fixed time-to-collision (TTC) threshold. The real vehicle test results showed that the proposed system was able to provide earlier warnings than the TTC-based system. The timely warning rate, i.e., the ratio of the number of warnings at the beginning of braking to the total number of warnings was 93.33%. The proposed system proved effective for providing early warning to the following vehicle under different driving conditions of the front vehicle.

© 2013 IEEE.

Number of references:41

Main heading:Vehicles

Controlled terms:Hidden Markov models - Software testing - Vehicle to vehicle communications

Uncontrolled terms:Collision warning - Commercial software - driving intention - Driving intention recognition - Forward collision warning system - Forward collision warnings - Rear-end collisions - V2V communications

Classification code:716 Telecommunication; Radar, Radio and Television - 723.5 Computer Applications - 922 Statistical Methods

Numerical data indexing:Percentage 6.34e+00%, Percentage 9.33e+01%, Percentage 9.77e+01%

DOI:10.1109/ACCESS.2020.2963854

Funding details: Number: 51278062, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017JQ6045, Acronym: -, Sponsor: Shanxi Province Science Foundation for Youths;Number: 300102229112, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work was supported in part by the National Natural Science Foundation under Grant 51278062, in part by the Shaanxi Province Science Foundation for Youths under Grant 2017JQ6045, and in part by the Fundamental Research Funds for the Central Universities under Grant 300102229112.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20192907194300

Title:Retrieval of marine inorganic particle concentrations in turbid waters using polarization signals

Authors:Liu, Jia (1); Liu, Jiahang (1, 5); He, Xianqiang (2, 3); Tian, Liqiao (4); Bai, Yan (2, 3); Chen, Tieqiao (1); Wang, Yihao (1); Zhu, Feng (1); Pan, Delu (2, 3)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technique of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) Institute of Oceanography, Shanghai Jiao Tong University, Shanghai; Shanghai, China; (4) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China; (5) College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, China

Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)

Source title:International Journal of Remote Sensing

Abbreviated source title:Int. J. Remote Sens.

Volume:41

Issue:13

Issue date:July 2, 2020

Publication year:2020

Pages:4901-4922

Language:English

ISSN:01431161

E-ISSN:13665901

CODEN:IJSEDK

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd.

Abstract:The polarization properties of water-leaving radiance (Lw) contains rich information about hydrosols, which has great potential to improve the retrieval accuracy of oceanic constituents. However, current ocean colour inversion algorithms are only based on the water-leaving radiation intensity, and the polarization properties have been ignored. Here, based on the radiative transfer simulations, the possibility of retrieving suspended particulate matter in turbid waters based on the polarization properties was investigated. The results showed that the degree of polarization (DOP) of the upward radiation just beneath the water surface has significant angular and spectral variations with respect to the observational geometries, inorganic particle concentrations, solar zenith angles and aerosol optical thicknesses (AOTs). The directional variations in DOP along with viewing zenith angles are typically characterized by a double peak feature with a maximum of 0.5 in the principal plane. In addition, the DOP in the visible bands is highly sensitive to inorganic particle concentrations. The DOP gradually decreases from 412 nm to 555 nm and increases with wavelengths beyond 555 nm, particularly for wavelengths larger than 620 nm. An empirical relationship between the DOP at 670 nm and the inorganic particle concentration was established for different viewing geometries with determination coefficient (R2) up to 0.9996. Overall, our simulation results indicate that the polarization property of underwater upward radiance has great potential for suspended particulate matter retrieval in coastal waters.

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.

Number of references:64

Main heading:Polarization

Controlled terms:Biogeochemistry - Particles (particulate matter)

Uncontrolled terms:Degree of polarization - Determination coefficients - Directional variation - Empirical relationships - Polarization properties - Radiative transfer simulations - Suspended particulate matters - Water-leaving radiances

Classification code:481.2 Geochemistry - 951 Materials Science

DOI:10.1080/01431161.2019.1641248

Funding details: Number: 2017YFA0603003, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: XAB2015A07, Acronym: -, Sponsor: -;Number: 2015CB954002,2016YFF0103604, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: -, Acronym: LIESMARS, Sponsor: State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing;Number: 17R02, Acronym: WHU, Sponsor: Wuhan University;Number: -, Acronym: SOED, Sponsor: State Key Laboratory of Satellite Ocean Environment Dynamics;Number: 201505003, Acronym: -, Sponsor: -;Number: 41706207,41676170,41621064,41676172,41825014, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QNHX1932,SOEDZZ1801, Acronym: -, Sponsor: -;

Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFA0603003, by the National Basic Research Program (??973?? Program) of China (Grant 2015CB954002), the National Key Research and Development Program of China under Grant 2016YFF0103604, by the National Natural Science Foundation of China under Grants 41706207, 41676170, 41676172, 41825014 and 41621064, the Public Science and Technology Research Funds Projects for Ocean Research (Grant 201505003), by the public fund of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources under Grants QNHX1932 and SOEDZZ1801, by the Western Young Scientist Program of CSA under Grant XAB2015A07, by the Open Research Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University under Grant 17R02.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508413144

Title:Determination of Lysinoalanine in Milk Products by Q-Orbitrap High Resolution Mass Spectrometry and Variation in Its Content with Temperature

Title of translation:Q-Orbitrap高分辨质谱法测定牛奶中赖丙氨酸及其含量随温度变化的规律

Authors:Nie, Xuemei (1, 2); Wang, Han (2, 3); Xu, Xiuli (2); Zhang, Feng (2); Chen, Da (1)

Author affiliation:(1) School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin; 300072, China; (2) Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing; 100176, China; (3) School of Food and Biological Engineering, Shaanxi University of Science & Technology, Xi'an; 710021, China

Corresponding author:Zhang, Feng(fengzhang@126.com)

Source title:Shipin Kexue/Food Science

Abbreviated source title:Shipin Kexue/Food Sc.

Volume:41

Issue:4

Issue date:February 25, 2020

Publication year:2020

Pages:280-286

Language:Chinese

ISSN:10026630

Document type:Journal article (JA)

Publisher:Chinese Chamber of Commerce

Abstract:A rapid method for the determination of lysinoalanine in milk products by ultra-high performance liquid chromatography-quadrupole/electrostatic field orbitrap high resolution mass spectrometry (UPLC-Q-Exactive Orbitrap HRMS) was developed. Samples were hydrolyzed with hydrochloric acid to remove impurities such as proteins and then separated on an Ascentis C8 column (100 mm × 4.6 mm, 3 μm) by gradient elution using a binary solvent system composed of acetonitrile and 0.1% formic acid in water. The analytes were detected by quadrupole-orbitrap high resolution mass spectrometry in full-MS and data dependent scan (ddMS2) mode. The results showed that the deviation between the theoretical and measured accurate mass to charge ratio of lysinoalanine was lower than 1.0 × 10-6, and a good linear relationship was observed in the concentration range of 1-200 μg/L with a correlation coefficient higher than 0.999. The limit of detection (LOD) was 0.01 mg/kg and the limit of quantitation (LOQ) was 0.025 mg/kg. Recoveries of the method were in the range of 78.7%-117.1% at spiked concentration levels of 0.025, 0.1, and 0.25 mg/kg, and the relative standard deviation (RSD) for precision was 3.64%. The method had high accurate, repeatability and sensitivity, and consequently was suitable for the qualitative and quantitative screening of lysinoalanine in milk products. Furthermore, the pattern of variation in lysinoalanine content of liquid milk processed using small-scale simulated processing equipment at different temperatures was studied.

© 2020, China Food Publishing Company. All right reserved.

Number of references:30

Main heading:Dairies

Controlled terms:Dairy products - High performance liquid chromatography - Mass spectrometry - Organic solvents - Removal

Uncontrolled terms:Binary solvent systems - Correlation coefficient - High resolution mass spectrometry - Limit of quantitations - Processing equipment - Quantitative screening - Relative standard deviations - Ultra-high performance liquid chromatographies

Classification code:801 Chemistry - 803 Chemical Agents and Basic Industrial Chemicals - 822.1 Food Products Plants and Equipment - 822.3 Food Products

Numerical data indexing:Mass_Density 1.00e-06kg/m3 to 2.00e-04kg/m3, Percentage 1.00e-01%, Percentage 3.64e+00%, Percentage 7.87e+01% to 1.17e+02%, Size 3.00e-06m, Size 4.60e-03m

DOI:10.7506/spkx1002-6630-20190328-350

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200908213767

Title:GaSe saturable absorber for mode-locked Yb-doped fiber laser at 1.04 µm

Authors:Ma, Q. (1); Ge, S.L. (2); Li, M.X. (3); Jia, Q. (3); Wen, C.L. (4)

Author affiliation:(1) School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin; 300072, China; (2) Department of Criminal Technology, Jilin Police College, Changchun; 130117, China; (3) School of Science, Changchun University of Science and Technology, Changchun; 130022, China; (4) Troops, 32035, PLA, Xi'an; 710000, China

Corresponding author:Li, M.X.(15754374309@163.com)

Source title:Infrared Physics and Technology

Abbreviated source title:Infrared Phys Technol

Volume:105

Issue date:March 2020

Publication year:2020

Article number:103251

Language:English

ISSN:13504495

CODEN:IPTEEY

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:Transition-metal dichalcogenides, such as tungsten disulfide (WS2) and molybdenium disulfide (MoS2), are highly anisotropic layered materials and have attracted growing interest from basic research to practical applications due to their exotic physical property that may complement graphene and other semiconductor materials. GaSe nanosheets are found to exhibit broadband nonlinear saturable absorption property, and saturable absorbers are fabricated by depositing GaSe nanosheets on side-polished fibers. Attributing to the weak evanescent field and long interaction length, the GaSe nanosheets are not exposed to large optical intensity, which allows the saturable absorber to work at the high-power regime. The saturable absorbers are used to mode locked dispersion-managed soliton fiber lasers.

© 2020 Elsevier B.V.

Number of references:24

Main heading:Mode-locked fiber lasers

Controlled terms:Evanescent fields - Fiber lasers - Fibers - Layered semiconductors - Molybdenum compounds - Nanosheets - Saturable absorbers - Selenium compounds - Semiconducting gallium compounds - Semiconducting selenium compounds - Semiconductor lasers - Semiconductor quantum wells - Solitons - Sulfur compounds - Transition metals - Tungsten compounds - Ytterbium compounds

Uncontrolled terms:Dispersion managed solitons - GaSe - Mode-locked - Optical intensities - Saturable absorption - Side-polished fiber - Transition metal dichalcogenides - Yb doped fiber laser

Classification code:531 Metallurgy and Metallography - 701 Electricity and Magnetism - 712.1.2 Compound Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 744 Lasers - 761 Nanotechnology - 933 Solid State Physics

DOI:10.1016/j.infrared.2020.103251

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210609881364

Title:Photonic perceptron based on a Kerr microcomb for high-speed, scalable, optical neural networks

Authors:Xu, Xingyuan (1, 2); Tan, Mengxi (1); Wu, Jiayang (1); Boes, Andreas (3); Corcoran, Bill (2); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6); Mitchell, Arnan (3); Hicks, Damien G. (1, 7); Moss, David J. (1)

Author affiliation:(1) Swinburne University of Technology, Optical Sciences Centre, Hawthorn; VIC; 3122, Australia; (2) Dept. of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia; (3) School of Engineering, Rmit University, Melbourne; VIC; 3001, Australia; (4) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (5) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics, Cas, Xi'an, China; (6) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (7) Bioinformatics Division, Walter and Eliza Hall Institute of Medical Research, Parkville; VIC; 3052, Australia

Source title:2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings

Abbreviated source title:Int. Top. Meet. Microw. Photonics, MWP - Proc.

Part number:1 of 1

Issue title:2020 International Topical Meeting on Microwave Photonics, MWP 2020 - Proceedings

Issue date:November 24, 2020

Publication year:2020

Pages:220-224

Article number:9314409

Language:English

ISBN-13:9784885523311

Document type:Conference article (CA)

Conference name:2020 International Topical Meeting on Microwave Photonics, MWP 2020

Conference date:November 24, 2020 - November 26, 2020

Conference location:Virtual, Matsue, Japan

Conference code:166501

Sponsor:Support Center for Advanced Telecommunications Technology Research, Foundation (SCAT); The Electronics Society of The Institute of Electronics, Information and Communication Engineers (IEICE); The Murata Science Foundation

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Optical artificial neural networks (ONNs) have significant potential for ultra-high computing speed and energy efficiency. We report a new approach to ONNs based on integrated Kerr micro-combs that is programmable, highly scalable and capable of reaching ultra-high speeds, demonstrating the building block of the ONN - a single neuron perceptron - by mapping synapses onto 49 wavelengths to achieve a single-unit throughput of 11.9 Giga-OPS at 8 bits per OP, or 95.2 Gbps. We test the perceptron on handwritten-digit recognition and cancer-cell detection - achieving over 90% and 85% accuracy, respectively. By scaling the perceptron to a deep learning network using off-the-shelf telecom technology we can achieve high throughput operation for matrix multiplication for real-time massive data processing.

© 2020 IEICE.

Number of references:75

Main heading:Neural networks

Controlled terms:Character recognition - Data handling - Deep learning - Energy efficiency - Green computing

Uncontrolled terms:Building blockes - Cancer cell detection - Handwritten digit recognition - High-throughput operation - Learning network - MAtrix multiplication - Optical neural networks - Ultra high speed

Classification code:525.2 Energy Conservation - 723.2 Data Processing and Image Processing

Numerical data indexing:Bit_Rate 9.52e+10bit/s, Percentage 8.50e+01%, Percentage 9.00e+01%

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200908228845

Title:Construction and investigation of a planar waveguide in photo-thermal-refractive glass by proton implantation

Authors:Chen, Jing-Yi (1); Xie, Zhong-Hu (1); Li, Wei-Nan (2); Lin, She-Bao (3); Zhang, Liao-Lin (4); Liu, Chun-Xiao (1)

Author affiliation:(1) College of Electronic and Optical Engineering, Nanjing University of Post and Telecommunications, Nanjing; 210023, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi′an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi′an; 710119, China; (3) Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji; 721007, China; (4) School of Material Science and Engineering, Jiangxi University of Science and Technology, Ganzhou; 341000, China

Corresponding author:Liu, Chun-Xiao(cxliu0816@sina.com)

Source title:Optik

Abbreviated source title:Optik

Volume:207

Issue date:April 2020

Publication year:2020

Article number:164461

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:In this paper, the fabrication of optical planar waveguide in PTR glass by proton implantation is reported for the first time to our knowledge. The planar waveguide with a width of approximately 3.4 μm was generated under the condition of 400 keV H+ ion implantation with a dose of 8.0 × 1016 ions ‧ cm−2 at room temperature. The formation mechanism of PTR glass waveguide was illustrated with the aid of the SRIM program. The optical characteristics of the PTR waveguide, such as refractive index profile and near-field intensity distribution, were investigated in detail. The fabricated PTR waveguide presents a structure of both index-well and optical barrier according to the reconstructed refractive index profile. The finite-difference beam propagation method was carried out to simulate guiding modal distribution. Besides, in order to study the thermal stability of the H+-implanted PTR waveguide, annealing treatment was conducted at different temperatures.

© 2020 Elsevier GmbH

Number of references:30

Main heading:Optical waveguides

Controlled terms:Beam propagation method - Birefringence - Glass - Ion implantation - Ions - Planar waveguides - Refractive index - Thermodynamic stability

Uncontrolled terms:Annealing treatments - Finite difference beam propagation method - Formation mechanism - Near-field intensity - Optical characteristics - Optical planar waveguides - Proton implantation - Refractive index profiles

Classification code:641.1 Thermodynamics - 711 Electromagnetic Waves - 714.3 Waveguides - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 812.3 Glass - 921 Mathematics

Numerical data indexing:Size 3.40e-06m

DOI:10.1016/j.ijleo.2020.164461

Funding details: Number: -, Acronym: NUPT, Sponsor: Nanjing University of Posts and Telecommunications;Number: SJCX19_0269, Acronym: -, Sponsor: -;Number: 11405041, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:The authors acknowledge the support from the Postgraduate Research and Practice Innovation Program of Jiangsu Province (Grant No. SJCX19_0269 ), the National Natural Science Foundation of China (Grant No. 11405041 ) and the Nanjing University of Posts and Telecommunications Scientific Foundation (NUPTSF) (Grant No. NY219101 ).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204709516246

Title:A highly sensitive piezoresistive sensor based on MXenes and polyvinyl butyral with a wide detection limit and low power consumption????(Open Access)

Authors:Qin, Ruzhan (1); Hu, Mingjun (2); Li, Xin (1); Yan, Li (2); Wu, Chuanguang (2); Liu, Jinzhang (2); Gao, Haibin (3); Shan, Guangcun (1); Huang, Wei (4)

Author affiliation:(1) School of Instrumentation Science and Opto-electronics Engineering, Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Beihang University, Beijing; 100191, China; (2) School of Materials Science and Engineering, Beihang University, Beijing; 100191, China; (3) Institute of Experimental Physics, Saarland University, Saarbrücken; 66123, Germany; (4) Shaanxi Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an; 710072, China

Source title:Nanoscale

Abbreviated source title:Nanoscale

Volume:12

Issue:34

Issue date:September 14, 2020

Publication year:2020

Pages:17715-17724

Language:English

ISSN:20403364

E-ISSN:20403372

Document type:Journal article (JA)

Publisher:Royal Society of Chemistry

Abstract:As a new class of two-dimensional transition-metal carbides and carbonitrides, MXenes have been widely used in energy storage, sensing, catalysis, electromagnetic interference shielding and other fields. It is a challenge to simultaneously realize a sensor with extremely high sensitivity, wide detection limits, low power consumption and good mechanical stability. In this work, taking advantage of the high conductivity of MXenes and the porous structure of polyvinyl butyral, a highly sensitive piezoresistive sensor was fabricated. The fabricated MXene/PVB-based sensor exhibits high sensitivity and reliability with a factor of ∼11.9 kPa-1, ∼1.15 kPa-1 and ∼0.20 kPa-1 in the ranges of 31.2 Pa-312 Pa, 312 Pa-62.4 kPa and 62.4 kPa-1248.4 kPa, respectively. The sensor has a wide detection range (∼31.2 Pa to ∼2.205 MPa), low detection limit (6.8 Pa), low detection voltage (0.1 mV), low power consumption (∼3.6 × 10-10 W), fast response time (∼110 ms) and good mechanical stability (over 10 000 maximum-pressure cycles). Moreover, it is demonstrated that the sensor can detect subtle bending and release activities of humans, including arterial pulses and voice signals, which makes it potentially suitable to be used as a wide detection range, highly sensitive and low power consumption piezoresistive sensor. This work provides a new avenue to expand the application of MXene-based flexible pressure sensors with a wide sensing range and ultra-low power consumption.

© The Royal Society of Chemistry.

Number of references:47

Main heading:Electric power utilization

Controlled terms:Carbides - Carbon nitride - Electromagnetic pulse - Electromagnetic shielding - Energy storage - Mechanical stability - Transition metals

Uncontrolled terms:Electromagnetic interference shielding - Fast response time - Flexible pressure sensors - Low detection limit - Low-power consumption - Piezo-resistive sensors - Transition metal carbide - Ultra-low power consumption

Classification code:525.7 Energy Storage - 531 Metallurgy and Metallography - 701 Electricity and Magnetism - 706.1 Electric Power Systems - 804.2 Inorganic Compounds

Numerical data indexing:Power 1.00e+01W, Pressure 3.12e+01Pa to 3.12e+02Pa, Pressure 3.12e+02Pa to 6.24e+04Pa, Pressure 6.24e+04Pa to 1.25e+06Pa, Pressure 6.80e+00Pa, Voltage 1.00e-04V

DOI:10.1039/d0nr02012e

Funding details: Number: 2016YFE0204200, Acronym: -, Sponsor: -;Number: 51702009, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:The authors acknowledge the funding support from the National Key R&D Program of China (Grant No. 2016YFE0204200) and the National Natural Science Foundation of China (NSFC Grant No. 51702009).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20204909563437

Title:Tunable Dual-Band Ultrasensitive Stereo Metamaterial Terahertz Sensor????(Open Access)

Authors:Cao, Pengfei (1); Wu, Yuyao (1); Wang, Zelong (1, 2); Li, Yuan (1); Zhang, Jing (1); Liu, Qiang (3, 4); Cheng, Lin (1); Niu, Tiaoming (1)

Author affiliation:(1) School of Information Science and Engineering, Lanzhou University, Lanzhou, China; (2) School of Precision Instruments and Optoelectronics Engineering, Institute of Laser and Optoelectronics, Tianjin University, Tianjin; 300072, China; (3) School of Energy and Power Engineering, Nanjing University of Technology, Nanjing, China; (4) Northwest Industries Group Company, Ltd., Xi'an; 710043, China

Corresponding author:Cao, Pengfei(caopf@lzu.edu.cnemailchenglin@lzu.edu.cn)Cheng, Lin(chenglin@lzu.edu.cn)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:219525-219533

Article number:9265179

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:To overcome the effect of analyte thickness and limitation of single wavelength sensing, we propose an ultra-sensitive stereo metamaterial biosensor with double resonance frequencies based on coupling electric resonance and magnetic resonance. The electromagnetic analysis demonstrates that the double resonance coupling, induced by the stereo double-layer structure, can significantly improve sensitive biosensing at the terahertz frequency. The results show that by changing the size of the structure, each resonance frequency can be independently tuned in the range of 0.5-1.8 THz and the maximum refractive index sensitivity is 930.4 GHz/RIU. These results have significant implications for the detection of samples with different frequency points. The proposed ultra-sensitive stereo metamaterial structure has excellent potential for application in biomolecule detection and differentiation.

© 2013 IEEE.

Number of references:55

Main heading:Metamaterials

Controlled terms:Magnetic resonance - Natural frequencies - Refractive index

Uncontrolled terms:Biomolecule detection - Different frequency - Electric resonance - Electromagnetic analysis - Metamaterial structures - Refractive index sensitivity - Resonance frequencies - Terahertz frequencies

Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 741.1 Light/Optics - 951 Materials Science

Numerical data indexing:Frequency 5.00e+11Hz to 1.80e+12Hz

DOI:10.1109/ACCESS.2020.3039503

Funding details: Number: 201406185011, Acronym: -, Sponsor: -;Number: 61205204,61701207,61804071, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 1606RJZA068,17JR5RA119,18JR3RA297, Acronym: -, Sponsor: Natural Science Foundation of Gansu Province;Number: K201717, Acronym: -, Sponsor: State Key Laboratory of Millimeter Waves;Number: lzujbky-2018-127,lzujbky-2018-129, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: -, Acronym: -, Sponsor: Scientific Research Foundation for Returned Scholars of Ministry of Education;

Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61205204, Grant 61701207, and Grant 61804071; in part by the China Scholarship Council Foundation under Grant 201406185011; in part by the Natural Science Foundation of Gansu Province under Grant 1606RJZA068, Grant 17JR5RA119, and Grant 18JR3RA297; in part by the State Key Laboratory of Millimeter Waves of Southeast University under Grant K201717; in part by the Fundamental Research Funds for the Central Universities of China under Grant lzujbky-2018-129 and Grant lzujbky-2018-127; and in part by the Scientific Research Foundation for the Returned Overseas Chinese Scholars.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20202308781690

Title:On-chip trans-dimensional plasmonic router????(Open Access)

Authors:Dong, Shaohua (1, 2); Zhang, Qing (2); Cao, Guangtao (2); Ni, Jincheng (2); Shi, Ting (2); Li, Shiqing (3); Duan, Jingwen (3); Wang, Jiafu (5); Li, Ying (1); Sun, Shulin (3); Zhou, Lei (4); Hu, Guangwei (2); Qiu, Cheng-Wei (2)

Author affiliation:(1) SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, International Collaborative Laboratory of 2D Materials for Optoelectronics Science, Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen; 518060, China; (2) Department of Electrical and Computer Engineering, National University of Singapore, Kent Ridge, Singapore; 117583, Singapore; (3) Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Green Photonics, Department of Optical Science and Engineering, Fudan University, Shanghai; 200433, China; (4) State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai; 200433, China; (5) Department of Basic Sciences, Airforce Engineering University, Xian; 710051, China

Corresponding author:Zhang, Qing(elezqing@nus.edu.sgemailchengwei.qiu@nus.edu.sgemailqueenly@vip.sina.com)Qiu, Cheng-Wei(chengwei.qiu@nus.edu.sgemailqueenly@vip.sina.com)Li, Ying(queenly@vip.sina.com)

Source title:Nanophotonics

Abbreviated source title:Nanophotonics

Volume:9

Issue:10

Issue date:September 1, 2020

Publication year:2020

Pages:3357-3365

Language:English

E-ISSN:21928614

Document type:Journal article (JA)

Publisher:De Gruyter Open Ltd

Abstract:Plasmons, as emerging optical diffraction-unlimited information carriers, promise the high-capacity, high-speed, and integrated photonic chips. The on-chip precise manipulations of plasmon in an arbitrary platform, whether two-dimensional (2D) or one-dimensional (1D), appears demanding but non-trivial. Here, we proposed a meta-wall, consisting of specifically designed meta-atoms, that allows the high-efficiency transformation of propagating plasmon polaritons from 2D platforms to 1D plasmonic waveguides, forming the trans-dimensional plasmonic routers. The mechanism to compensate the momentum transformation in the router can be traced via a local dynamic phase gradient of the meta-atom and reciprocal lattice vector. To demonstrate such a scheme, a directional router based on phase-gradient meta-wall is designed to couple 2D SPP to a 1D plasmonic waveguide, while a unidirectional router based on grating metawall is designed to route 2D SPP to the arbitrarily desired direction along the 1D plasmonic waveguide by changing the incident angle of 2D SPP. The on-chip routers of trans-dimensional SPP demonstrated here provide a flexible tool to manipulate propagation of surface plasmon polaritons (SPPs) and may pave the way for designing integrated plasmonic network and devices.

© 2020 Shaohua Dong et al., published by De Gruyter. 2020.

Number of references:43

Main heading:Surface plasmons

Controlled terms:Electromagnetic wave polarization - Metamaterials - Phonons - Photons - Surface plasmon resonance - Waveguides

Uncontrolled terms:High efficiency transformation - Information carriers - Integrated photonics - Optical diffractions - Plasmonic waveguides - Reciprocal lattice vectors - Surface plasmon polaritons - Two Dimensional (2 D)

Classification code:711 Electromagnetic Waves - 714.3 Waveguides - 931.3 Atomic and Molecular Physics - 951 Materials Science

DOI:10.1515/nanoph-2020-0078

Funding details: Number: 15270 00014,R-263-000-B91-305, Acronym: A*STAR, Sponsor: Agency for Science, Technology and Research;Number: NRFCRP 15-2015-03, Acronym: NRF, Sponsor: National Research Foundation Singapore;Number: 11564014,61865006, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by A*STAR Pharos Program (grant number 15270 00014, with project number R-263-000-B91-305), the National Research Foundation, Prime Minister’s Office, Singapore, under its Competitive Research Program (CRP award number NRFCRP 15-2015-03), and the National Natural Science Foundation of China (grant no. 61865006 and 11564014).This work was supported by A?STAR Pharos Program (grant number 15270 00014, with project number R-263-000-B91-305), the National Research Foundation, Prime Minister's Office, Singapore, under its Competitive Research Program (CRP award number NRFCRP 15-2015-03), and the National Natural Science Foundation of China (grant no. 61865006 and 11564014).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20204009262759

Title:Photonic RF Fractional Hilbert Transformers and Filters Based on Integrated Soliton Crystal Microcombs

Authors:Xu, Xingyuan (1); Tan, Mengxi (1); Wu, Jiayang (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Science, Xi'an, China; (5) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) ITMO University, St. Petersburg, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Source title:Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS

Abbreviated source title:Conf Proc Laser Electr Optic Soc Annu Meet CLEO

Volume:2020-May

Part number:1 of 1

Issue title:2020 Conference on Lasers and Electro-Optics, CLEO 2020 - Proceedings

Issue date:May 2020

Publication year:2020

Article number:9192904

Language:English

ISSN:10928081

CODEN:CPLSE4

ISBN-13:9781943580767

Document type:Conference article (CA)

Conference name:2020 Conference on Lasers and Electro-Optics, CLEO 2020

Conference date:May 10, 2020 - May 15, 2020

Conference location:San Jose, CA, United states

Conference code:163003

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We report photonic RF fractional Hilbert transformers and filters based on a 49GHz soliton crystal micro-comb source. By employing up to 80 wavelengths and controlling the channel weights, diverse transfer functions are achieved.

© 2020 OSA.

Number of references:11

Main heading:Crystal filters

Controlled terms:Crystals - Solitons

Uncontrolled terms:And filters - Comb source - Hilbert transformers - Microcombs

Classification code:703.2 Electric Filters - 933.1 Crystalline Solids

Numerical data indexing:Frequency 4.90e+10Hz

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204509465677

Title:Photonic RF fractional hilbert transformers and filters based on integrated soliton crystal microcombs

Authors:Xu, Xingyuan (1); Tan, Mengxi (1); Wu, Jiayang (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) ARC Centre of Excellence for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS), RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Science, Xi'an, China; (5) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (6) ITMO University, St. Petersburg, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Corresponding author:Moss, David J.(dmoss@swin.edu.au)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Volume:Part F183-CLEO-SI 2020

Part number:1 of 1

Issue title:CLEO: Science and Innovations, CLEO_SI 2020

Issue date:2020

Publication year:2020

Article number:SW4J.7

Language:English

ISBN-13:9781943580767

Document type:Conference article (CA)

Conference name:CLEO: Science and Innovations, CLEO_SI 2020

Conference date:May 10, 2020 - May 15, 2020

Conference location:Washington, DC, United states

Conference code:143838

Publisher:OSA - The Optical Society

Abstract:We report photonic RF fractional Hilbert transformers and filters based on a 49GHz soliton crystal micro-comb source. By employing up to 80 wavelengths and controlling the channel weights, diverse transfer functions are achieved.

© OSA 2020 © 2020 The Author(s)

Number of references:11

Main heading:Crystal filters

Controlled terms:Crystals - Solitons

Uncontrolled terms:And filters - Comb source - Hilbert transformers - Microcombs

Classification code:703.2 Electric Filters - 933.1 Crystalline Solids

Numerical data indexing:Frequency 4.90e+10Hz

DOI:10.1364/CLEO_SI.2020.SW4J.7

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204809547144

Title:Efficient temperature-feedback liposome for 19F MRI signal enhancement

Authors:Ren, Lili (1, 2); Chen, Shizhen (1); Jiang, Weiping (1); Zeng, Qingbin (1); Zhang, Xu (1); Xiao, Long (1); McMahon, Michael T. (3); Xin, Lou (4); Zhou, Xin (1)

Author affiliation:(1) Key Laboratory of Magnetic Resonance in Biological Systems, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics, Wuhan; 430071, China; (2) Department of Pulmonary and Critical Care Medicine, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China; (3) Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore; MD; 21287, United States; (4) Department of Radiology, Chinese Pla General Hospital, Beijing, China

Corresponding author:Chen, Shizhen(chenshizhen@wipm.ac.cnemailxinzhou@wipm.ac.cn)Zhou, Xin(xinzhou@wipm.ac.cn)

Source title:Chemical Communications

Abbreviated source title:Chem. Commun.

Volume:56

Issue:92

Issue date:November 28, 2020

Publication year:2020

Pages:14427-14430

Language:English

ISSN:13597345

E-ISSN:1364548X

CODEN:CHCOFS

Document type:Journal article (JA)

Publisher:Royal Society of Chemistry

Abstract:A new non-encapsulated fluorinated liposome (TSL) was developed, which showed instantaneous temperature-induced 19F MR signal enhancement and excellent stability under reversible signal transition at different conditions.

© 2020 The Royal Society of Chemistry.

Number of references:43

Main heading:Feedback

Controlled terms:Signal systems

Uncontrolled terms:MR signals - Signal enhancement - Signal transition - Temperature feedback - Temperature-induced

Classification code:731.1 Control Systems

DOI:10.1039/d0cc05809b

Funding details: Number: 2017 CFA013,2018ACA143, Acronym: -, Sponsor: -;Number: QYZDY-SSW-SLH018,ZDBS-LY-JSC004, Acronym: -, Sponsor: -;Number: 2018YFA0704000, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: Tencent;Number: 21874150,81625011,81730048,81801690,81825012,91859206, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:We are thankful for financial support from National Key R&D Program of China (2018YFA0704000), National Natural Science Foundation of China (81801690, 81625011, 91859206, 21874150, 81730048, 81825012), Key Research Program of Frontier Sciences, CAS (ZDBS-LY-JSC004, QYZDY-SSW-SLH018) and Hubei Provincial Natural Science Foundation of China (2017 CFA013, 2018ACA143). Xin Zhou acknowledges the support from the Tencent Foundation through the XPLORER PRIZE. Human lung adenocarcinoma cell line A549 cell line was obtained from the Cell Bank of Chinese Academy of Sciences (Shanghai, China).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210309778675

Title:Mapping diffuse emission in lyman UV band

Authors:Ji, Li (1, 12); Lou, Zheng (1); Zhang, Jinlong (2); Qiu, Keqiang (3); Li, Shuangying (2); Sun, Wei (1, 12); Yan, Shuping (1, 12); Shuinai, Zhang (1, 12); Qian, Yuan (1); Wang, Sen (4); Werner, Klaus (5); Fang, Taotao (6); Wang, Tinggui (7); Barnstedt, Jürgen (5); Buntrock, Sebastian (5); Cai, Mingsheng (1, 12); Chen, Wen (8); Conti, Lauro (5); Deng, Lei (8); Diebold, Sebastian (5); Fu, Shaojun (3); Guo, Jianhua (1, 12); Hanke, Lars (5); Hong, Yilin (3); Kalkuhl, Christoph (5); Kappelmann, Norbert (5); Kaufmann, Thomas (5); Lei, Shijun (1, 12); Li, Fu (9); Li, Xinfeng (10); Liu, Wei (1); Meyer, Kevin (11); Rauch, Thomas (5); Ruan, Ping (9); Schaadt, Daniel M. (11); Schanz, Thomas (5); Song, Qian (4); Stelzer, Beate (5); Wang, Zhanshan (2); Yang, Jianfeng (9); Zhang, Wei (1)

Author affiliation:(1) Purple Mountain Observatory, CAS, Nanjing, China; (2) Institute of Precision Optical Engineering, School of Physics Science and Engineering, Tongji University, Shanghai, China; (3) National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, China; (4) National Astronomical Observatories, CAS, Beijing, China; (5) Institute for Astronomy and Astrophysics, Universität Tübingen, Tübingen, Germany; (6) Department of Astronomy, Xiamen University, Xiamen, China; (7) Department of Astronomy, University of Science and Technology of China, Hefei, China; (8) Innovation of Academy for Microsatellites, CAS, Shanghai, China; (9) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (10) Technology and Engineering Center for Space Utilization, CAS, Beijing, China; (11) Institute of Energy Research and Physical Technologies, Clausthal University of Technology, Clausthal, Germany; (12) Key Laboratory of Dark Matter and Space Astronomy, CAS, Nanjing, China

Corresponding author:Ji, Li(ji@pmo.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11444

Part number:1 of 1

Issue title:Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

Issue date:2020

Publication year:2020

Article number:1144407

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636750

Document type:Conference article (CA)

Conference name:Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

Conference date:December 14, 2020 - December 18, 2020

Conference location:Virtual, Online, CA, United states

Conference code:166330

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:The CAFE (Census of warm-hot intergalactic medium, Accretion, and Feedback Explorer) and LyRIC (Lyman UV Radiation from Interstellar medium and Circum-galactic medium) have been proposed to the space agencies in China respectively. CAFE was first proposed in 2015 as a joint scientific CAS-ESA small space mission. LyRIC was proposed in 2019 as an independent external payload operating on the Chinese Space Station. Both missions are dedicated to mapping the Lyman UV emission (ionized oxygen (O vi) resonance lines at 103.2 and 103.8 nm, and Lyman series) for the diffuse sources in our Galaxy and the circum-galactic mediums of the nearby galaxies. We present the primary science objectives, mission concepts, the enabling technologies, as well as the current status.

© 2020 SPIE

Number of references:42

Main heading:Gamma rays

Controlled terms:Galaxies - Mapping - Space flight - Space stations - Space telescopes

Uncontrolled terms:Diffuse emission - Diffuse sources - Enabling technologies - Interstellar mediums - Mission concepts - Resonance line - Science objectives - Warm-hot intergalactic mediums

Classification code:405.3 Surveying - 656.1 Space Flight - 741.3 Optical Devices and Systems - 931.3 Atomic and Molecular Physics

Numerical data indexing:Size 1.03e-07m, Size 1.04e-07m

DOI:10.1117/12.2561839

Funding details: Number: 114332KYSB20180013, Acronym: -, Sponsor: -;Number: -, Acronym: KIAA, Sponsor: Kangaroo Industry Association of Australia;Number: -, Acronym: CAFE, Sponsor: Center for Agriculture, Food and the Environment, University of Massachusetts Amherst;Number: U1531248, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: UP, Sponsor: Universität Potsdam;Number: -, Acronym: INAF, Sponsor: Istituto Nazionale di Astrofisica;Number: -, Acronym: USTC, Sponsor: University of Science and Technology of China;Number: -, Acronym: NAOC, Sponsor: National Astronomical Observatories, Chinese Academy of Sciences;

Funding text:L. Ji acknowledges support from NSFC grant U1531248 and CAS International grant 114332KYSB20180013.The scientific program described here was originally developed by members of CAFE and LyRIC teams including: Q.S. Gu, P. Zhou, Y. Chen, Z. Li, J. Zhou, X. Hou, X. Luo (NJU), Y. Gao, X.Z. Zheng, X. Kang, L. Feng, X.J. Jiang, C. Ge, J. Ji, S. Wang, G. Chen, S. Jin, X. Zhou, Y. Zhang, X. Long, W. Shan (PMO), F. Cheng, X. Kong, G. Liu (USTC), J. Wang, F. Zhang (Xiamen U.), L. Ho (KIAA), X. Fang, L. Gao, J. Liu (NAOC), Z. Cai (Tsinghua U.), H.G. Xu, J. Shen (Shanghai Jiaotong U.), L. Hao (SHAO), J.R. Mao (YNOC) from China, and our international collaborators: M. Baes (U. Gent, Belgium), M. A. Barstow (U. Leicester, UK), R. de Grijs (Macquarie U., Australia), M. Hayes, R. Lallement (GEPI, France), F. Nicastro (Istituto Nazionale di Astrofisica, Italy), P. Richter (University of Potsdam, Germany), D. Valls-Gabaud (GEPI, France), J. Bregman, J. Li, Z. Qu (U. Michigan, USA), Q. D. Wang (UMASS, USA), Kinwah Wu (MSSL, UK), and J. Wilms (FAU Erlangen-N?rnberg, Germany). L. Ji acknowledges support from NSFC grant U1531248 and CAS International Cooperation Key Project grant 114332KYSB20180013.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202208763121

Title:Full-frequency correction of spatial impulse response in back-projection scheme using space-variant filtering for optoacoustic mesoscopy????(Open Access)

Authors:Lu, Tong (1); Wang, Yihan (3); Li, Jiao (1, 2); Prakash, Jaya (4); Gao, Feng (1, 2); Ntziachristos, Vasilis (5)

Author affiliation:(1) College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin; 300072, China; (2) Tianjin Key Laboratory of Biomedical Detecting Techniques and Instruments, Tianjin; 300072, China; (3) School of Life Science and Technology, Xidian University, Xi'an; 710071, China; (4) Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangaluru; 60012, India; (5) Institute for Biological and Medical Imaging, Technical University of Munich and Helmholtz Center Munich, Neuherberg; 85764, Germany

Corresponding author:Li, Jiao(jiaoli@tju.edu.cn)

Source title:Photoacoustics

Abbreviated source title:Photoacoustics

Volume:19

Issue date:September 2020

Publication year:2020

Article number:100193

Language:English

ISSN:22135979

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:The fidelity and quality of reconstructed images in optoacoustic mesoscopy (OPAM) can be significantly improved by considering the spatial impulse response (SIR) of the employed focused transducer into reconstruction. However, the traditional method fully taking the SIR into account can hardly meet the data-intensive requirements of high resolution OPAM because of excessive memory and time consumption. Herein, a modified back-projection method using a space-variant filter for full-frequency correction of the SIR is presented, and applied to the OPAM system with a sphere-focused transducer. The proposed method can readily manage the large datasets of the OPAM and effectively reduce the extra time consumption. The performance of the proposed method is showcased by simulations and experiments of phantoms and biological tissue. The results demonstrate that the modified back-projection method exhibits better image fidelity, resolution and contrast compared to the common and weighted back-projection methods that are not or not fully accounting for the SIR.

© 2020 The Authors

Number of references:43

Main heading:Image enhancement

Controlled terms:Bioinformatics - Impulse response - Large dataset - Transducers

Uncontrolled terms:Back-projection methods - Biological tissues - Focused transducer - Frequency correction - Quality of reconstructed images - Space-variant filtering - Spatial impulse response - Time consumption

Classification code:461.8.2 Bioinformatics

DOI:10.1016/j.pacs.2020.100193

Funding details: Number: 19JCQNJC12800, Acronym: -, Sponsor: -;Number: 61901342,81401453,81671728,81771880,81871393,81971656, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:The authors gratefully acknowledge the following grants support: National Natural Science Foundation of China (NSFC) grants 81771880 , 81401453 , 61901342 , 81671728 , 81871393 , 81971656 ; Tianjin Municipal Government of China grant 19JCQNJC12800 .

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

Accession number:20202408811961

Title:Distributed consensus of heterogeneous multi-agent systems subject to switching topologies and delays

Authors:Meng, Min (1); Xiao, Gaoxi (1); Zhai, Chao (2); Li, Guoqi (3); Wang, Zhen (4)

Author affiliation:(1) School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore; (2) School of Automation, China University of Geosciences, and Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems, Wuhan; 430074, China; (3) Department of Precision Instrument, Center for Brain Inspired Computing Research, Tsinghua University, Beijing; 100084, China; (4) School of Mechanical Engineering and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China

Corresponding author:Xiao, Gaoxi(egxxiao@ntu.edu.sg)

Source title:Journal of the Franklin Institute

Abbreviated source title:J Franklin Inst

Volume:357

Issue:11

Issue date:July 2020

Publication year:2020

Pages:6899-6917

Language:English

ISSN:00160032

CODEN:JFINAB

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:In this paper, the problem of distributed output consensus is investigated for heterogeneous multi-agent systems subject to a class of uncertainties in communication channels. The studied uncertainties, leading to a time-varying communication topology modeled as a Markovian switching communication topology and delayed transit information, may happen discontinuously and affect the consensus behavior of multi-agent systems. To mitigate the effects of such uncertainties on output consensus, a novel switching distributed control protocol is proposed, aiming to guarantee output consensus of the studied networks in the mean square sense. Moreover, an algorithm is given to select the required controller gains based on the solutions to a Lyapunov inequality and a group of regulator equations. Along this framework, a simulation example on the IEEE 24 Bus System is presented to demonstrate the effectiveness of the algorithm and the theoretical results.

© 2020 The Franklin Institute

Number of references:34

Main heading:Multi agent systems

Controlled terms:Distributed parameter control systems - Topology

Uncontrolled terms:Communication topologies - Distributed consensus - Distributed control protocols - Heterogeneous multi-agent systems - Lyapunov inequality - Markovian switching - Regulator equations - Simulation example

Classification code:731.1 Control Systems - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1016/j.jfranklin.2020.04.045

Funding details: Number: MOE2016-T2-1-119, Acronym: -, Sponsor: -;

Funding text:This work was partially supported by Ministry of Education, Singapore, under contract of MOE2016-T2-1-119.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20212110391728

Title:Broadband terahertz generation from an epsilon-near-zero thin film

Authors:Jia, Wenhe (1); Liu, Meng (2); Lu, Yongchang (2); Feng, Xi (2); Wang, Qingwei (2); Zhang, Xueqian (2); Ni, Yibo (1); Hu, Futai (1); Gong, Mali (1); Xu, Xinlong (3); Huang, Yuanyuan (3); Zhang, Weili (4); Yang, Yuanmu (1); Han, Jiaguang (2)

Author affiliation:(1) Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing; 100084, China; (2) Center for THz Waves, College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin; 300072, China; (3) Shaanxi Joint Lab of Graphene, State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics and Photon-Technology, Northwest University, Xi'an; 710069, China; (4) Oklahoma State University, School of Electrical and Computer Engineering, Stillwater; OK, United States

Corresponding author:Jia, Wenhe(jwh19@mails.tsinghua.edu.cn)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Part number:1 of 1

Issue title:Frontiers in Optics - Proceedings Frontiers in Optics / Laser Science, Part of Frontiers in Optics + Laser Science APS/DLS, FiO 2020

Issue date:September 14, 2020

Publication year:2020

Article number:FM1B.6

Language:English

ISBN-13:9781557528209

Document type:Conference article (CA)

Conference name:2020 Frontiers in Optics Conference, FiO 2020

Conference date:September 14, 2020 - September 17, 2020

Conference location:Washington, DC, United states

Conference code:168840

Publisher:The Optical Society

Abstract: We experimentally demonstrate broadband THz emission, both in transmission and reflection configurations, from a commercially available indium tin oxide thin film, leveraging its unique epsilon-near-zero effect.

© OSA 2020 © 2020 The Author(s)

Number of references:8

DOI:10.1364/FIO.2020.FM1B.6

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205209677756

Title:Single-photon Counting Laser Ranging with Optical Frequency Combs

Authors:Ren, Xinyi (1); Xu, Bo (2); Fei, Qilai (3); Liang, Yan (2); Ge, Jinman (4); Wang, Xiaoyue (1); Huang, Kun (5); Yan, Ming (6); Zeng, Heping (5)

Author affiliation:(1) State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.; (2) Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China.; (3) Chongqing Institute of East China Normal University, No. 2 Huizhu Road, Chongqing 401147, China.; (4) National Key Laboratory of Science and Technology on Space Microwave, CAST Xi’an, 710100, China.; (5) State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China and Chongqing Institute of East China Normal University, No. 2 Huizhu Road, Chongqing 401147, China.; (6) State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China and Chongqing Institute of East China Normal University, No. 2 Huizhu Road, Chongqing 401147, China. (e-mail: myan@lps.ecnu.edu.cn)

Source title:IEEE Photonics Technology Letters

Abbreviated source title:IEEE Photonics Technol Lett

Issue date:2020

Publication year:2020

Language:English

ISSN:10411135

E-ISSN:19410174

CODEN:IPTLEL

Document type:Article in Press

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Time-of-flight single-photon counting laser ranging offers an important tool for remote sensing and imaging. However, limited by the temporal properties of a single-photon detection and counting system, it encounters a challenge for high-resolution and high-precision distance metrology. Here, we incorporated dual-comb based laser ranging, an enabling technique for rapid distance measurements with high precision and large range ambiguity, with time-correlated single-photon counting (TCSPC) technology and demonstrated its feasibility for precise laser ranging under a photon-starved condition. Based on interferometric measurements of two asynchronous 2.8-pW, 25-GHz electro-optic laser combs with TCSPC, micrometer-level ranging precision was achieved for consistent distance measurements (a stand-off distance of 15.6 m) over several days. New opportunities might open up for high-resolution and high-precision single-photon counting laser ranging.

IEEE

Main heading:Particle beams

Controlled terms:Photons - Remote sensing

Uncontrolled terms:Distance metrology - Enabling techniques - Interferometric measurement - Optical frequency combs - Single photon counting - Single photon detection - Stand-off distance (SoD) - Time-correlated single-photon counting

Classification code:931.3 Atomic and Molecular Physics - 932.1 High Energy Physics

Numerical data indexing:Frequency 2.50e+10Hz, Power 2.80e-12W, Size 1.56e+01m

DOI:10.1109/LPT.2020.3042499

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909585839

Title:Medical Additive Manufacturing: From a Frontier Technology to the Research and Development of Products????(Open Access)

Authors:Qiu, Guixing (1); Ding, Wenjiang (2, 3); Tian, Wei (4); Qin, Ling (5, 6, 7); Zhao, Yu (1); Zhang, Lianmeng (8); Lu, Jian (9, 10, 11); Chen, Daijie (12, 13); Yuan, Guangyin (2, 14); Wu, Chengtie (15, 16); Lu, Bingheng (17); Du, Ruxu (18); Chen, Jimin (19, 20, 21, 22); Elbestawi, Mo (23); Gu, Zhongwei (24); Li, Dichen (25); Sun, Wei (26, 27, 28, 29, 30); Zhao, Yuanjin (31); He, Jie (32); Jin, Dadi (33); Liu, Bin (34); Zhang, Kai (35); Li, Jianmo (36); Leong, Kam W. (37); Zhao, Dewei (38); Hao, Dingjun (39); Ao, Yingfang (40); Deng, Xuliang (41); Yang, Huilin (42); Hsu, ShaoKeh (43); Chen, Yingqi (5, 6); Li, Long (5, 6); Fan, Jianping (5); Nie, Guohui (44); Chen, Yun (45); Zeng, Hui (45); Chen, Wei (46); Lai, Yuxiao (5, 6)

Author affiliation:(1) Department of Orthopedics, Peking Union Medical College Hospital, Chinese Academy of Medical Science & Peking Union Medical College, Beijing; 100730, China; (2) National Engineering Research Center of Light Alloys Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai; 200240, China; (3) National Engineering Research Center of Mg Materials and Applications and School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (4) Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing; 100035, China; (5) Center for Translational Medicine Research and Development, Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen; 518055, China; (6) Guangdong Engineering Laboratory of Biomaterials Additive Manufacturing, Guangdong; 518055, China; (7) Musculoskeletal Research Laboratory of the Department of Orthopedics & Traumatology and Innovative Orthopedic Biomaterial and Drug Translational Research Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong; 999077, Hong Kong; (8) State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan; 430070, China; (9) Center for Advanced Structural Materials, City University of Hong Kong Shenzhen Research Institute, Shenzhen; 518057, China; (10) Hong Kong Branch of National Precious Metals Material Engineering Research Center, Department of Material Science and Engineering, City University of Hong Kong, Hong Kong; 999077, Hong Kong; (11) Department of Mechanical Engineering, City University of Hong Kong, Hong Kong; 999077, Hong Kong; (12) School of Pharmacy, Shanghai Jiao Tong University, Shanghai; 200240, China; (13) China State Institute of Pharmaceutical Industry, Shanghai Institute of Pharmaceutical Industry, Shanghai; 201203, China; (14) Shanghai Innovation Institute for Materials, Shanghai; 200444, China; (15) State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China; (16) Center of Materials Science and Optoelectronics Engineering, University of the Chinese Academy of Science, Beijing; 100049, China; (17) Micro- and Nano-Technology Research Center, State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (18) Shien-Ming Wu School of Intelligent Engineering, Guangzhou International Campus, South China University of Technology, Guangzhou; 510641, China; (19) Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing; 100124, China; (20) Beijing Engineering Research Center of Laser Technology, Beijing University of Technology, Beijing; 100124, China; (21) Key Laboratory of Trans-Scale Laser Manufacturing Technology (Beijing University of Technology), Ministry of Education, Beijing; 100124, China; (22) Institute of Laser Engineering, Beijing University of Technology, Beijing; 100124, China; (23) Department of Mechanical Engineering, McMaster University, Hamilton; ON; L8S 4L7, Canada; (24) College of Materials Science and Engineering, Nanjing Tech University, Nanjing; 210009, China; (25) State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an; 710054, China; (26) Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Tsinghua University, Beijing; 100084, China; (27) Biomanufacturing Center, Department of Mechanical Engineering, Tsinghua University, Beijing; 100084, China; (28) 111 "Biomanufacturing and Engineering Living Systems" Innovation International Talents Base, Tsinghua University, Beijing; 100084, China; (29) Key Laboratory of Advanced Forming and Manufacturing, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing; 100084, China; (30) Department of Mechanical Engineering, Drexel University, Philadelphia; PA; 19104, United States; (31) State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing; 210096, China; (32) Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Science & Peking Union Medical College, Beijing; 100730, China; (33) Department of Spine Surgery, The Third Affiliated Hospital, Southern Medical University, Guangzhou; 510515, China; (34) Fourth Bureau of the Center for Medical Device Evolution of the National Medical Products Administration, Beijing; 100044, China; (35) National Engineering Research Center for Biomaterials, Sichuan University, Chengdu; 610064, China; (36) Kangxi Biomedical (Shenzhen) Co., Ltd. (KONEE), Shenzhen; 518040, China; (37) Department of Biomedical Engineering, Columbia University, New York; NY; 10027, United States; (38) Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, Dalian; 116001, China; (39) Department of Spine Surgery, Honghui Hospital, Health Science Centre, Xi'an Jiaotong University, Xi'an; 710054, China; (40) Institute of Sports Medicine, Beijing Key Laboratory of Sports Injuries, Peking University, Beijing; 100191, China; (41) Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing; 100081, China; (42) Department of Orthopedic Surgery, The First Affiliated Hospital of Soochow University, Suzhou; 215006, China; (43) Department of Orthopedic Surgery, Tungs' Taichung Metroharbor Hospital, Taichung; 406, China; (44) Shenzhen Second People's Hospital, Shenzhen; 518006, China; (45) Peking University Shenzhen Hospital, Shenzhen; 518033, China; (46) Chinese Academy of Engineering Shenzhen Academician Consultation Center, Shenzhen; 518046, China

Source title:Engineering

Abbreviated source title:Engineering

Volume:6

Issue:11

Issue date:November 2020

Publication year:2020

Pages:1217-1221

Language:English

ISSN:20958099

Document type:Journal article (JA)

Publisher:Elsevier Ltd

DOI:10.1016/j.eng.2020.10.002

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20204509469344

Title:Ultrafast formation of a transient two-dimensional diamondlike structure in twisted bilayer graphene????(Open Access)

Authors:Luo, Duan (1, 2, 3); Hui, Dandan (2, 3); Wen, Bin (4); Li, Renkai (5); Yang, Jie (5); Shen, Xiaozhe (5); Reid, Alexander Hume (5); Weathersby, Stephen (5); Kozina, Michael E. (5); Park, Suji (5); Ren, Yang (6); Loeffler, Troy D. (1); Sankaranarayanan, S.K.R.S. (1); Chan, Maria K. Y. (1); Wang, Xing (2); Tian, Jinshou (2, 7); Arslan, Ilke (1); Wang, Xijie (5); Rajh, Tijana (1); Wen, Jianguo (1)

Author affiliation:(1) Center for Nanoscale Materials, Argonne National Laboratory, Lemont; IL; 60439, United States; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao; 066004, China; (5) SLAC National Accelerator Laboratory, Menlo Park; CA; 94025, United States; (6) X-ray Science Division, Argonne National Laboratory, Lemont; IL; 60439, United States; (7) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China

Corresponding author:Rajh, Tijana(rajh@anl.govemailjwen@anl.govemaillrk@slac.stanford.edu)Wen, Jianguo(jwen@anl.govemaillrk@slac.stanford.edu)Li, Renkai(lrk@slac.stanford.edu)

Source title:Physical Review B

Abbreviated source title:Phys. Rev. B

Volume:102

Issue:15

Issue date:October 29, 2020

Publication year:2020

Article number:155431

Language:English

ISSN:24699950

E-ISSN:24699969

Document type:Journal article (JA)

Publisher:American Physical Society

Abstract:Due to the absence of matching carbon atoms at honeycomb centers with carbon atoms in adjacent graphene sheets, theorists predicted that a sliding process is needed to form AA, AB′, or ABC stacking when directly converting graphite into sp3 bonded diamond. Here, using twisted bilayer graphene, which naturally provides AA and AB′ stacking configurations, we report the ultrafast formation of a transient two-dimensional diamondlike structure (which is not observed in aligned graphene) under femtosecond laser irradiation. This photoinduced phase transition is evidenced by the appearance of bond lengths of 1.94 and 3.14 Å in the time-dependent differential pair distribution function using MeV ultrafast electron diffraction. Molecular dynamics and first-principles calculation indicate that sp3 bonds nucleate at AA and AB′ stacked areas in a moiré pattern. This work sheds light on the direct graphite-to-diamond transformation mechanism, which has not been fully understood for more than 60 years.

© 2020 American Physical Society.

Number of references:59

Main heading:Graphene

Controlled terms:Calculations - Distribution functions - Femtosecond lasers - Graphite - Molecular dynamics

Uncontrolled terms:Diamondlike structures - Differential pairs - First-principles calculation - Photo-induced phase transitions - Stacking configurations - Transformation mechanisms - Twisted bilayers - Ultrafast electron diffraction

Classification code:761 Nanotechnology - 801.4 Physical Chemistry - 804 Chemical Products Generally - 921 Mathematics - 922.1 Probability Theory

Numerical data indexing:Size 3.14e-10m, Age 6.00e+01yr, Size 1.94e-10m

DOI:10.1103/PhysRevB.102.155431

Funding details: Number: -, Acronym: USDOE, Sponsor: U.S. Department of Energy;Number: DE-AC02-06CH11357, Acronym: SC, Sponsor: Office of Science;Number: DE-AC02-76SF00515, Acronym: BES, Sponsor: Basic Energy Sciences;Number: 11805267,51771165,51925105, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: YS2018YFA070119, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:We thank Dr. J. A. Jaszczak for providing single-crystal bulk graphite samples, Dr. M. Harb and Dr. M. Mo for helpful discussion, and S. Yu for assistance in MD simulations. D.L. thanks the China Scholarships Council (CSC) Joint PhD Training Program for the financial support of studying abroad. This work was performed at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the US Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. The MeV-UED experiments were carried out at SLAC MeV-UED, U.S. Department of Energy Office of Science User Facilities, operated as part of the Linac Coherent Light Source at the SLAC National Accelerator Laboratory, supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. This work was also supported by the National Natural Science Foundation of China (NSFC, Grants No. 51925105, No. 51771165, and No. 11805267), and the National Key R&D Program of China (Grant No. YS2018YFA070119).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20200708178905

Title:Iterative local Fourier transform-based high-accuracy wavelength calibration for Fourier transform imaging spectrometer????(Open Access)

Authors:Xu, Yixuan (1); Li, Jianxin (1, 2); Bai, Caixun (3); Wei, Ming (1); Liu, Jie (1); Wang, Yubo (1); Ji, Yiqun (4, 5)

Author affiliation:(1) School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing; 210094, China; (2) MIIT Key Laboratory of Advanced Solid Laser, Nanjing University of Science and Technology, Nanjing; 210094, China; (3) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (4) School of Optoelectronic Science and Engineering, Soochow University, Suzhou; 215006, China; (5) Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province, Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou; 215006, China

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:28

Issue:4

Issue date:February 17, 2020

Publication year:2020

Pages:5768-5786

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:An iterative local Fourier transform (ILFT)-based high-accuracy wavelength calibration for Fourier transform imaging spectrometer (FTIS) is proposed. The wavelength calibration for FTIS is to determine the relation between the wavelength and the wavenumber position. However, the wavenumber position solved by conventional method is only accurate up to integers restricted by the picket-fence effect of discrete Fourier transform. While the proposed ILFT can increase the accuracy of calculating the wavenumber position by combining the local Fourier transform and a few iterations. In this paper, the method is investigated in theory and then by simulations and experiments. The simulations show that the accuracy of the wavenumber position calculated by the ILFT is increased by 100 times than conventional method with noise, phase error, and non-uniform sampling of optical path difference. And the experimental results indicate that the ILFT decreases the absolute error of wavelength calibration from about 2.03 nm to 0.16 nm. Therefore, the method provides theoretical and technical support for FTIS and promotes the development of superior resolutions therein.

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Number of references:34

Main heading:Iterative methods

Controlled terms:Calibration - Discrete Fourier transforms - Phase noise - Spectrometers

Uncontrolled terms:Conventional methods - Fourier transform imaging spectrometers - Nonuniform sampling - Optical path difference - Picket fence effects - Superior resolution - Wavelength calibration - Wavenumber position

Classification code:701.2 - 741.3 - 921.3 - 921.6

Numerical data indexing:Size 2.03e-09m to 1.60e-10m

DOI:10.1364/OE.384058

Funding details: Number: 61340007,61405134,61475072,61975079, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: PAPD, Sponsor: Priority Academic Program Development of Jiangsu Higher Education Institutions;

Funding text:National Natural Science Foundation of China (61975079, 61475072, 61405134, 61340007); Priority Academic Program Development of Jiangsu Higher Education Institutions.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:5894083

Title:Spectral-Spatial Attention Network for Hyperspectral Image Classification

Authors:Sun, Hao (1); Zheng, Xiangtao (1); Lu, Xiaoqiang (1); Wu, Siyuan (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:5

Issue date:May 2020

Publication year:2020

Pages:3232-3245

Article number:8909379

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Hyperspectral image (HSI) classification aims to assign each hyperspectral pixel with a proper land-cover label. Recently, convolutional neural networks (CNNs) have shown superior performance. To identify the land-cover label, CNN-based methods exploit the adjacent pixels as an input HSI cube, which simultaneously contains spectral signatures and spatial information. However, at the edge of each land-cover area, an HSI cube often contains several pixels whose land-cover labels are different from that of the center pixel. These pixels, named interfering pixels, will weaken the discrimination of spectral-spatial features and reduce classification accuracy. In this article, a spectral-spatial attention network (SSAN) is proposed to capture discriminative spectral-spatial features from attention areas of HSI cubes. First, a simple spectral-spatial network (SSN) is built to extract spectral-spatial features from HSI cubes. The SSN is composed of a spectral module and a spatial module. Each module consists of only a few 3-D convolution and activation operations, which make the proposed method easy to converge with a small number of training samples. Second, an attention module is introduced to suppress the effects of interfering pixels. The attention module is embedded into the SSN to obtain the SSAN. The experiments on several public HSI databases demonstrate that the proposed SSAN outperforms several state-of-The-Art methods.

© 1980-2012 IEEE.

Number of references:54

Controlled terms:discriminant analysis - image classification - multispectral image - pixel - satellite imagery - spectral analysis - three-dimensional modeling

Classification code:71.8.5.4

DOI:10.1109/TGRS.2019.2951160

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5974538

Title:Diverse rock types detected in the lunar south pole-aitken basin by the Chang'E-4 lunar mission

Authors:Huang, Jun (1, 2); Xiao, Zhiyong (2, 3, 4); Xiao, Long (1, 2, 4); Horgan, Briony (5); Hu, Xiaoyi (1); Lucey, Paul (6); Xiao, Xiao (1); Zhao, Siyuan (1); Qian, Yuqi (1); Zhang, Hao (1); Li, Chunlai (7); Xu, Rui (7); He, Zhiping (7); Yang, Jianfeng (8); Xue, Bin (8); He, Qi (1); Zhong, Jie (9); Lin, Hongyu (10); Huang, Changning (10); Xie, Jianfeng (11)

Author affiliation:(1) State Key Laboratory of Geological Processes and Mineral Resources, Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, Hubei; 430074, China; (2) Chinese Academy of Sciences (CAS) Center for Excellence in Comparative Planetology, Hefei, Anhui; 230026, China; (3) Planetary Environmental and Astrobiological Laboratory, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong; 519000, China; (4) State Key Laboratory of Lunar and Planetary Sciences, Space Science Institute, Macau University of Science and Technology, Macau; 999078, China; (5) Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette; IN; 47907, United States; (6) Hawai'i Institute of Geophysics and Planetology, University of Hawai'i at Manoa, Honolulu; HI; 96822, United States; (7) Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China; (8) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (9) Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China; (10) Institute of Space Mechanics and Electricity, China Academy of Space Technology, Beijing; 100086, China; (11) Beijing Aerospace Flight Control Center, Beijing; 100094, China

Corresponding author:Huang, Jun(junhuang@cug.edu.cn)

Source title:Geology

Abbreviated source title:Geology

Volume:48

Issue:7

Issue date:2020

Publication year:2020

Pages:723-727

Language:English

ISSN:00917613

E-ISSN:19432682

CODEN:GLGYBA

Document type:Journal article (JA)

Publisher:Geological Society of America

Abstract:The South Pole-Aitken (SPA) basin, located between the South Pole and Aitken crater on the far side of the Moon, is the largest confirmed lunar impact structure. The pre-Nectarian SPA basin is a 2400 x 2050 km elliptical structure centered at 53°S, 191°E, which should have exposed lower crust and upper mantle due to the enormous excavation depth. Olivine, the dominant mineral in Earth's mantle, has only been identified in small and localized exposures in the margins of the SPA basin, and the dominant mafic component is, instead, pyroxene. These mineralogical characteristics could be explained by the recent hypothesis that the lunar upper mantle is dominated by low-calcium pyroxene, not olivine. Here, we present observations from imaging and spectral data from China's Chang'E-4 (CE-4) lunar mission in the first 4 synodic days, especially the first in situ visible/near-infrared spectrometer observations of an exposed boulder. We identified a variety of rock types, but not the recently reported olivine-rich materials in the landing region. The results are consistent with orbital observations. The obtained mineralogical information provides a better understanding of the nature and origin of SPA materials.

© 2020 Geological Society of America.

Number of references:34

Controlled terms:boulder - Chang'e - crater - lower crust - Moon - upper mantle

Geographic terms:Antarctica - East Antarctica - South Pole

Classification code:72.17.1

DOI:10.1130/G47280.1

Funding details: Number: 41772050, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41773061, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41773063, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41830214, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (grant XDA17010403), the Natural Science Foundation of China (grants 41773061, 41772050, 41830214, 41773063), the China National Space Administration (CNSA) Pre-research Project on Civil Aerospace Technologies (grant D020101), and the Science and Technology Development Fund of Macau (grants 121/2017/A3, 0042/2018/A2). We thank editor Mark Quigley for editorial handling, and Daniel Moriarty, Hap McSween, and an anonymous reviewer for their constructive comments. CNSA Lunar Exploration and Space Program Center and the Chinese Academy of Sciences Lunar and Deep Space Exploration General Department coordinated data access.

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.ErratuFlg:632822386

 

 

 

Accession number:20203209022824

Title:Photonic Perceptron Based on a Kerr Microcomb for High-Speed, Scalable, Optical Neural Networks????(Open Access)

Authors:Xu, Xingyuan (1, 8); Tan, Mengxi (1); Corcoran, Bill (2); Wu, Jiayang (1); Nguyen, Thach G. (3); Boes, Andreas (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6); Mitchell, Arnan (3); Hicks, Damien G. (1, 7); Moss, David J. (1)

Author affiliation:(1) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC 3122, Australia; (2) Department of Electrical and Computer Systems Engineering, Monash University, Clayton; 3800 VIC, Australia; (3) Integrated Photonics and Applications Centre (InPAC), School of Engineering, RMIT University, Melbourne; VIC 3001, Australia; (4) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong; 999077, China; (5) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi'an; 710119, China; (6) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Québec; J3 × 1S2, Canada; (7) Bioinformatics Division, Walter & Eliza Hall Institute of Medical Research, Parkville, Victoria; 3052, Australia; (8) Electro-Photonics Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC 3800, Australia

Corresponding author:Moss, David J.(dmoss@swin.edu.au)

Source title:Laser and Photonics Reviews

Abbreviated source title:Laser Photon. Rev.

Volume:14

Issue:10

Issue date:October 1, 2020

Publication year:2020

Article number:2000070

Language:English

ISSN:18638880

E-ISSN:18638899

Document type:Journal article (JA)

Publisher:Wiley-VCH Verlag

Abstract:Optical artificial neural networks (ONNs)—analog computing hardware tailored for machine learning—have significant potential for achieving ultra-high computing speed and energy efficiency. A new approach to architectures for ONNs based on integrated Kerr microcomb sources that is programmable, highly scalable, and capable of reaching ultra-high speeds is proposed here. The building block of the ONN—a single neuron perceptron—is experimentally demonstrated that reaches a high single-unit throughput speed of 11.9 Giga-FLOPS at 8 bits per FLOP, corresponding to 95.2 Gbps, achieved by mapping synapses onto 49 wavelengths of a microcomb. The perceptron is tested on simple standard benchmark datasets—handwritten-digit recognition and cancer-cell detection—achieving over 90% and 85% accuracy, respectively. This performance is a direct result of the record low wavelength spacing (49GHz) for a coherent integrated microcomb source, which results in an unprecedented number of wavelengths for neuromorphic optics. Finally, an approach to scaling the perceptron to a deep learning network is proposed using the same single microcomb device and standard off-the-shelf telecommunications technology, for high-throughput operation involving full matrix multiplication for applications such as real-time massive data processing for unmanned vehicles and aircraft tracking.

© 2020 Wiley-VCH GmbH

Number of references:64

Main heading:Neural networks

Controlled terms:Aircraft detection - Character recognition - Data handling - Deep learning - Energy efficiency - Green computing - Learning systems - Unmanned vehicles

Uncontrolled terms:Aircraft tracking - Benchmark datasets - Cancer cell detection - Handwritten digit recognition - High-throughput operation - Optical neural networks - Telecommunications technologies - Wavelength spacing

Classification code:525.2 Energy Conservation - 716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing

Numerical data indexing:Bit_Rate 9.52e+10bit/s, Percentage 8.50e+01%, Percentage 9.00e+01%

DOI:10.1002/lpor.202000070

Funding details: Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: DP150104327, Acronym: ARC, Sponsor: Australian Research Council;Number: -, Acronym: -, Sponsor: Canada Research Chairs;Number: FT104101104,XDB24030000, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported by the Australian Research Council Discovery Projects Program (No. DP150104327). R.M. acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery and Acceleration Grants Schemes, by the MESI PSR‐SIIRI Initiative in Quebec, and by the Canada Research Chair Program. B.E.L. was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, Grant No. XDB24030000. D.G.H was supported in part by Australian Research Council grant FT104101104.This work was supported by the Australian Research Council Discovery Projects Program (No. DP150104327). R.M. acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec, and by the Canada Research Chair Program. B.E.L. was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, Grant No. XDB24030000. D.G.H was supported in part by Australian Research Council grant FT104101104.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze, Green

Accession number:20212110389290

Title:Distinct laser dynamics from a single figure-eight laser with an integrated nonlinear waveguide

Authors:Aadhi, A. (1); Roztocki, Piotr (1); Kovalev, Anton V. (2); Kues, Michael (3); Fischer, Bennet (1); Reimer, Christian (4); Zhang, Yanbing (1); Wang, Tao (1, 5); Little, Brent E. (6); Chu, Sai T. (7); Wang, Zhiming (5); Moss, David J. (8); Viktorov, Evgeny A. (2); Morandotti, Roberto (1, 5)

Author affiliation:(1) Institut National de la Recherche Scientifique - Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (2) ITMO University, Birhzevaya Liniya 14, St. Petersburg; 199034, Russia; (3) Hannover Center for Optical Technologies, Leibniz University Hannover, Nienburger Str. 1, Hannover; 30167, Germany; (4) HyperLight Corporation, 501 Massachusetts Avenue, Cambridge; MA; 02139, United States; (5) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan; 610054, China; (6) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (7) City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (8) Centre for Micro Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia

Corresponding author:Morandotti, Roberto(morandotti@emt.inrs.ca)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Part number:1 of 1

Issue date:2020

Publication year:2020

Language:English

ISBN-13:9781557528209

Document type:Conference article (CA)

Conference name:Nonlinear Photonics, NP 2020

Conference date:July 13, 2020 - July 16, 2020

Conference location:Washington, DC, United states

Conference code:143878

Publisher:The Optical Society

Abstract: We report a passive mode-locked laser system using a nonlinear amplifying loop mirror configuration with an integrated waveguide, capable of delivering different temporal pulse profiles with adjustable features from a single compact architecture.

© 2020 The Author (s).

Number of references:9

Main heading:Laser mirrors

Controlled terms:Waveguides

Uncontrolled terms:Compact architecture - Integrated waveguides - Laser dynamics - Nonlinear amplifying loop mirrors - Nonlinear waveguides - Passive mode-locked - Pulse profile

Classification code:714.3 Waveguides - 741.3 Optical Devices and Systems

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200508114891

Title:Broadband Microwave Frequency Conversion Based on an Integrated Optical Micro-Comb Source????(Open Access)

Authors:Xu, Xingyuan (1); Wu, Jiayang (1); Tan, Mengxi (1); Nguyen, Thach G. (2); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5, 6, 7); Mitchell, Arnan (2); Moss, David J. (1)

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Physics and Material Science, City University of Hong Kong, Hong Kong, Hong Kong; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Beijing; 100190, China; (5) INSR-Énergie, Matériaux et Télécommunications, Varennes; QC; J3X 1S2, Canada; (6) ITMO University, Saint Petersburg; 197101, Russia; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Corresponding author:Moss, David J.(dmoss@swin.edu.au)

Source title:Journal of Lightwave Technology

Abbreviated source title:J Lightwave Technol

Volume:38

Issue:2

Issue date:January 15, 2020

Publication year:2020

Pages:332-338

Article number:8769870

Language:English

ISSN:07338724

E-ISSN:15582213

CODEN:JLTEDG

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We report a broadband microwave frequency converter based on a coherent Kerr optical micro-comb generated by an integrated micro-ring resonator. The coherent micro-comb displays features that are consistent with soliton crystal dynamics with a free spectral range of 48.9 GHz. We use this to demonstrate a high-performance millimeter-wave local oscillator for microwave frequency conversion. We experimentally verify the microwave performance up to 40 GHz, achieving a ratio of-6.8 dB between output radio frequency power and intermediate frequency power and a spurious suppression ratio of >43.5 dB. The experimental results show good agreement with theory and verify the effectiveness of microwave frequency converters based on coherent optical micro-combs, with the ability to achieve reduced size, complexity, and potential cost.

© 1983-2012 IEEE.

Number of references:49

Main heading:Microwave resonators

Controlled terms:Frequency converter circuits - Microwave frequencies - Microwave oscillators - Millimeter waves - Optical frequency conversion - Optical resonators

Uncontrolled terms:Free spectral range - High performance millimeter wave - Intermediate frequencies - Microwave performance - Microwave Photonics - Optical combs - Radio frequency power - Spurious suppressions

Classification code:711 Electromagnetic Waves - 713.2 Oscillators - 713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 714 Electronic Components and Tubes - 741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Frequency 4.00e+10Hz, Frequency 4.89e+10Hz

DOI:10.1109/JLT.2019.2930466

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:5894098

Title:Subspace Clustering Constrained Sparse NMF for Hyperspectral Unmixing

Authors:Lu, Xiaoqiang (1); Dong, Le (1); Yuan, Yuan (2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Computer Science, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:5

Issue date:May 2020

Publication year:2020

Pages:3007-3019

Article number:8891771

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:As one of the most important information of hyperspectral images (HSI), spatial information is usually simulated with the similarity among pixels to enhance the unmixing performance of nonnegative matrix factorization (NMF). Nevertheless, the similarity is generally calculated based on the Euclidean distance between pairwise pixels, which is sensitive to noise and fails in capturing subspace information of hyperspectral data. In addition, it is independent of the NMF framework. In this article, we propose a novel unmixing method called subspace clustering constrained sparse NMF (SC-NMF) for hyperspectral unmixing to more accurately extract endmembers and correspond abundances. First, the nonnegative subspace clustering is embedded into the NMF framework to learn a similar graph, which takes full advantage of the characteristics of the reconstructed data itself to extract the spatial correlation of pixels for unmixing. It is noteworthy that the similar graph and NMF will be simultaneously updated. Second, to mitigate the influence of noise in HSI, only the k largest values are retained in each self-expression vector. Finally, we use the idea of subspace clustering to extract endmembers by linearly combining of all pixels in spectral subspace, aiming at giving a reasonable physical significance to the endmembers. We evaluate the proposed SC-NMF on both synthetic and real hyperspectral data, and experimental results demonstrate that the proposed method is effective and superior by comparing with the state-of-The-Art methods.

© 1980-2012 IEEE.

Number of references:66

Controlled terms:cluster analysis - image analysis - numerical method - pixel - spectral analysis

Classification code:71.8.5.4 Remote sensing: numerical and image analysis

DOI:10.1109/TGRS.2019.2946751

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109714362

Title:Long-distance underwater optical wireless communication with PPLN wavelength conversion

Authors:Yang, Yi (1); Fan, Lirong (1); He, Fengtao (1); Song, Yuqin (1); Duan, Zuoliang (1); Zhu, Yunzhou (2); Li, Bili (2)

Author affiliation:(1) Xi'An University of Posts and Telecommunications, School of Electronic Engineering, Department of Optoelectronic Technology, Xi'an; 710121, China; (2) Xi'An Institute of Precision Machinery Key Laboratory, Xi'an; 710076, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11717

Part number:1 of 1

Issue title:24th National Laser Conference and Fifteenth National Conference on Laser Technology and Optoelectronics

Issue date:2020

Publication year:2020

Article number:117172J

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510642690

Document type:Conference article (CA)

Conference name:24th National Laser Conference and 15th National Conference on Laser Technology and Optoelectronics

Conference date:October 17, 2020 - October 20, 2020

Conference location:Shanghai, China

Conference code:165963

Publisher:SPIE

Abstract:In this thesis, we designed and experimentally demonstrated a high-power high-speed underwater optical wireless communication (UOWC) system with wavelength conversion construction. External modulation based on 1064nm laser is used for high-speed information communication, as well as the optical amplifier is used to obtain enough optical power of 1064nm laser. After that, according to the quasi-phase-matching (QPM) conditions, the PPLN optical structure is designed to improve the wavelength conversion efficiency for achieving higher 532nm laser output power in 24.5â., ~40°C. Compared to the 532nm LD modulation system, this system can output 1.4W 532nm laser power in 100Mbps. This system experiments in single link 100m water tap of the attenuation coefficient 0.73dB/m equivalent to the clear ocean, and the measured bit error rate (BER) is 6.2×10-6 in 100Mbps pseudo-random binary sequence (PRBS) data without the forward error correction (FEC). Based on receiver sensitivity and the seawater channel optical transmission model, the transmission performance was predicted to be 340m@100Mbps and 100m@2Gbps in the attenuation coefficient equivalent to pure seawater.

© 2020 SPIE.

Number of references:22

Main heading:Optical signal processing

Controlled terms:Binary sequences - Bit error rate - Error correction - Light transmission - Marine communication - Modulation - Optical communication - Optoelectronic devices - Phase matching - Seawater

Uncontrolled terms:Attenuation coefficient - External modulation - Optical transmission model - Optical wireless communications - Pseudo-random binary sequences - Quasi-phase-matching - Receiver sensitivity - Transmission performance

Classification code:471.4 Seawater, Tides and Waves - 713 Electronic Circuits - 717.1 Optical Communication Systems - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723.1 Computer Programming - 741.1 Light/Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Bit_Rate 1.00e+08bit/s, Size 1.00e+02m, Size 1.06e-06m, Size 5.32e-07m

DOI:10.1117/12.2587316

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109724500

Title:Visual Tracking Via Temporally-Regularized Context-Aware Correlation Filters????(Open Access)

Authors:Liao, Jiawen (1); Qi, Chun (2); Cao, Jianzhong (1); Bian, He (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) Xi'an Jiaotong University, School of Electronics and Information Engineering, Xi'an, China

Source title:Proceedings - International Conference on Image Processing, ICIP

Abbreviated source title:Proc. Int. Conf. Image Process. ICIP

Volume:2020-October

Part number:1 of 1

Issue title:2020 IEEE International Conference on Image Processing, ICIP 2020 - Proceedings

Issue date:October 2020

Publication year:2020

Pages:2051-2055

Article number:9191027

Language:English

ISSN:15224880

ISBN-13:9781728163956

Document type:Conference article (CA)

Conference name:2020 IEEE International Conference on Image Processing, ICIP 2020

Conference date:September 25, 2020 - September 28, 2020

Conference location:Virtual, Abu Dhabi, United arab emirates

Conference code:165772

Sponsor:The Institute of Electrical and Electronics Engineers Signal Processing Society

Publisher:IEEE Computer Society

Abstract:Classical discriminative correlation filter (DCF) model suffers from boundary effects, several modified discriminative correlation filter models have been proposed to mitigate this drawback using enlarged search region, and remarkable performance improvement has been reported by related papers. However, model deterioration is still not well addressed when facing occlusion and other challenging scenarios. In this work, we propose a novel Temporally-regularized Context-aware Correlation Filters (TCCF) model to model the target appearance more robustly. We take advantage of the enlarged search region to obtain more negative samples to make the filter sufficiently trained, and a temporal regularizer, which restricting variation in filter models between frames, is seamlessly integrated into the original formulation. Our model is derived from the new discriminative learning loss formulation, a closed form solution for multidimensional features is provided, which is solved efficiently using Alternating Direction Method of Multipliers (ADMM). Extensive experiments on standard OTB-2015, TempleColor-128 and VOT-2016 benchmarks show that the proposed approach performs favorably against many state-of-the-art methods with real-time performance of 28fps on single CPU.

© 2020 IEEE.

Number of references:22

Main heading:Image processing

Controlled terms:Benchmarking - Deterioration

Uncontrolled terms:Alternating direction method of multipliers - Boundary effects - Closed form solutions - Correlation filters - Discriminative learning - Negative samples - Real time performance - State-of-the-art methods

Classification code:951 Materials Science

DOI:10.1109/ICIP40778.2020.9191027

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:5815828

Title:Gated and Axis-Concentrated Localization Network for Remote Sensing Object Detection

Authors:Lu, Xiaoqiang (1); Zhang, Yuanlin (1, 2); Yuan, Yuan (3); Feng, Yachuang (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Optical Imagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:1

Issue date:January 2020

Publication year:2020

Pages:179-192

Article number:8827601

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In the multicategory object detection task of high-resolution remote sensing images, small objects are always difficult to detect. This happens because the influence of location deviation on small object detection is greater than on large object detection. The reason is that, with the same intersection decrease between a predicted box and a true box, Intersection over Union (IoU) of small objects drops more than those of large objects. In order to address this challenge, we propose a new localization model to improve the location accuracy of small objects. This model is composed of two parts. First, a global feature gating process is proposed to implement a channel attention mechanism on local feature learning. This process takes full advantages of global features' abundant semantics and local features' spatial details. In this case, more effective information is selected for small object detection. Second, an axis-concentrated prediction (ACP) process is adopted to project convolutional feature maps into different spatial directions, so as to avoid interference between coordinate axes and improve the location accuracy. Then, coordinate prediction is implemented with a regression layer using the learned object representation. In our experiments, we explore the relationship between the detection accuracy and the object scale, and the results show that the performance improvements of small objects are distinct using our method. Compared with the classical deep learning detection models, the proposed gated axis-concentrated localization network (GACL Net) has the characteristic of focusing on small objects.

© 2019 IEEE.

Number of references:46

Controlled terms:accuracy assessment - algorithm - detection method - image analysis - regression analysis - remote sensing

Classification code:71.8.5.4 Remote sensing: numerical and image analysis

DOI:10.1109/TGRS.2019.2935177

Funding details: Number: -, Acronym: -, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61472413, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61702498, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61761130079, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61772510, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61806193, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: QYZDB-SSWJSC015, Acronym: -, Sponsor: Chinese Academy of Sciences;Number: SKLST2017010, Acronym: -, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFB0502900, in part by the National Natural Science Foundation of China under Grant 61806193, Grant 61702498, Grant 61772510, Grant 61761130079, and Grant 61472413, in part by the National Natural Science Foundation for Distinguished Young Scholars under Grant 61825603, in part by the State Key Program of National Natural Science of China under Grant 61632018, in part by the Key Research Program of Frontier Sciences, CAS, under Grant QYZDY-SSW-JSC044, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSWJSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, under Grant SKLST2017010, in part by the CAS Light of West China Program under Grant XAB2017B26 and Grant XAB2017B15, and in part by the Xi'an Postdoctoral Innovation Base Scientific Research Project.

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:6075628

Title:Physical and Mechanical Characteristics of Lunar Soil at the Chang'E-4 Landing Site

Authors:Tang, Zhencheng (1, 2); Liu, Jianjun (1, 2); Wang, Xing (1, 2); Ren, Xin (1); Chen, Wangli (1); Yan, Wei (1); Zhang, Xiaoxia (1); Tan, Xu (1); Zeng, Xingguo (1); Liu, Dawei (1); Zhang, Hongbo (1, 2); Wen, Weibin (1); Zuo, Wei (1, 2); Su, Yan (1, 2); Yang, Jianfeng (3); Li, Chunlai (1, 2)

Author affiliation:(1) Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China; (2) School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Liu, Jianjun(liujj@nao.cas.cnemaillicl@nao.cas.cnemailliujj@nao.cas.cnemaillicl@nao.cas.cn)Li, Chunlai(licl@nao.cas.cnemailliujj@nao.cas.cnemaillicl@nao.cas.cn)Liu, Jianjun(liujj@nao.cas.cnemaillicl@nao.cas.cn)Li, Chunlai(licl@nao.cas.cn)

Source title:Geophysical Research Letters

Abbreviated source title:Geophys. Res. Lett.

Volume:47

Issue:22

Issue date:November 28, 2020

Publication year:2020

Article number:e2020GL089499

Language:English

ISSN:00948276

E-ISSN:19448007

CODEN:GPRLAJ

Document type:Journal article (JA)

Publisher:Blackwell Publishing Ltd

Abstract:Chang'E-4, with the Yutu-2 rover, is the first lunar probe to successfully land and conduct a tour on the far side of the Moon from early 2019. We analyze the physical and mechanical characteristics of lunar soil through the in situ terrain data collected by the panoramic camera onboard the Yutu-2 rover. With the slip ratio and wheel sinkage obtained by the derived Digital Orthophoto Map (DOM) and Digital Elevation Model (DEM), the mechanical parameters of lunar soil are derived from the slip-sinkage model. These mechanical parameters and wheel size of the rover are used to obtain the pressure-sinkage curves, which can estimate the lunar soil strength. The experimental results indicate that the soil strength at the Chang'E-4 landing site is much higher than that at the Chang'E-3 landing site. The discrepancies in lunar soil strength between the two landing sites may be related to the local surface topography and degree of space weathering.

©2020. American Geophysical Union. All Rights Reserved.

Number of references:34

Controlled terms:digital elevation model - instrumentation - lunar soil - mechanical property - parameter estimation - soil strength - spatiotemporal analysis

Classification code:71.2.8 Landforms of other planets - 72.17.1 Moon

DOI:10.1029/2020GL089499

Funding details: Number: 11941002, Acronym: NSFC;NNSF;NNSFC, Sponsor: National Natural Science Foundation of China;Number: Z191100004319001, Acronym: -, Sponsor: Beijing Municipal Science and Technology Commission;

Funding text:This work was funded by the CE-4 mission of Chinese Lunar Exploration Program (CLEP), National Natural Science Foundation of China (Grant No.11941002), and Beijing Municipal Science and Technology Commission (No. Z191100004319001). We are grateful to the team members of the Ground Research and Application System, who have contributed to data receiving and release.

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109718870

Title:Detection method and evaluation of zoom CAM curve based on linear displacement

Authors:Zhao, Yue (1); Kang, Shifa (1); Qin, Xing (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanicsn of Cas, Xi'an, ShaanXi, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11617

Part number:1 of 1

Issue title:International Conference on Optoelectronic and Microelectronic Technology and Application

Issue date:2020

Publication year:2020

Article number:1161718

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510640696

Document type:Conference article (CA)

Conference name:2020 International Conference on Optoelectronic and Microelectronic Technology and Application

Conference date:October 20, 2020 - October 22, 2020

Conference location:Nanjing, China

Conference code:165962

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Zoom CAM curve is an important part of the optical system imaging. The processing accuracy of the curve directly affects the image clarity and consistency of the optical system. In this paper, a high precision measuring device for zoom CAM curve is designed, and an optimization method of testing results is adopted. According to the curve of the CAM rotation Angle and the number of teeth on the surface of the cylindrical, with mesh number as the sample size, relative to the CAM follower parts through the grating ruler curve of linear displacement measurement and corresponding data fitting. The regression analysis method is adopted to analyze the measurement results of the grating ruler based on the detection of the altimeter, and the regression equation is obtained and modified to optimize the measurement fitting data, so as to finally improve the detection accuracy of the zoom CAM curve. The confidence interval of machining accuracy based on grating ruler CAM curve is analyzed and evaluated by an example. The results show that the zoom CAM curve detection device and result optimization method proposed in this paper have the characteristics of high accuracy, high stability and easy realization.

© 2020 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:11

Main heading:Curve fitting

Controlled terms:Machining - Microelectronics - Optical systems

Uncontrolled terms:Confidence interval - Detection accuracy - Linear displacements - Machining Accuracy - Optimization method - Processing accuracies - Regression analysis methods - Regression equation

Classification code:604.2 Machining Operations - 741.3 Optical Devices and Systems - 921.6 Numerical Methods

DOI:10.1117/12.2585040

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109723758

Title:Design of near Infrared Continuous Zoom Optical System

Authors:Ma, Zi-Xuan (1); Li, Xu-Yang (1); Ren, Zhi-Guang (1); Chu, Nan-Qing (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xiopm, Xi'an, China

Source title:2020 5th Optoelectronics Global Conference, OGC 2020

Abbreviated source title:Optoelectron. Glob. Conf., OGC

Part number:1 of 1

Issue title:2020 5th Optoelectronics Global Conference, OGC 2020

Issue date:September 7, 2020

Publication year:2020

Pages:52-56

Article number:9260417

Language:English

ISBN-13:9781728198606

Document type:Conference article (CA)

Conference name:5th Optoelectronics Global Conference, OGC 2020

Conference date:September 7, 2020 - September 11, 2020

Conference location:Shenzhen, China

Conference code:165333

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In order to achieve continuous fine recognition of targets with limited distance, a large zoom ratio near infrared continuous zoom optical system has been designed. Based on the zoom system and its automatic design principle of aberrations, reasonable technical indicators were formulated, the initial structure of the system was determined, and the optical design software CodeV was used to optimize it to achieve a continuous zoom optical system with good imaging quality. The system uses a detector of 4.5-micron × 4.5-micron pixels, and the field of view is 2.7-degree × 2.7-degree ~ 12.7-degree × 12.7-degree, F number is 4.8, using mechanical positive group compensation method, composed of front group, zoom group, compensation group and rear group, including 14 spherical lenses. The design results were evaluated for image quality and the cam curve was solved. The design and analysis results show that the system achieves a continuous zoom of 70-mm350-mm in the 750-nano ~ 900-nano band. The optical modulation transfer function of the system is better than 0.3 at Ill-lp/mm, the maximum distortion is less than 2%, the image quality is good, and the processing cost is low. The system has the characteristics of large zoom ratio, high resolution, compact structure and smooth zoom curve, and can be used for fine recognition of limited distance targets.

© 2020 IEEE.

Number of references:12

DOI:10.1109/OGC50007.2020.9260417

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508383659

Title:Dynamics of the spatial mode competition process in a dual-cavity solid-state vortex laser

Authors:Lian, Tianhong (1); Wang, Shiyu (2); Kou, Ke (1); Jiao, Mingxing (1)

Author affiliation:(1) Department of Precision Instrument, Xi'an University of Technology, Xi'an; 710048, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China

Corresponding author:Lian, Tianhong(tianhongl@126.com)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11437

Part number:1 of 1

Issue title:2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications

Issue date:2020

Publication year:2020

Article number:114370D

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636521

Document type:Conference article (CA)

Conference name:2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications

Conference date:October 26, 2019 - October 28, 2019

Conference location:Beijing, China

Conference code:158574

Sponsor:China Instrument and Control Society (CIS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:A multiple mode rate equations model of the dual-cavity solid-state vortex laser has been established and used to investigate the dynamic process of the Laguerre-Gaussian (LG) modes competition. We calculated the dynamic processes of the modes LG01, LG02 and LG03. The results show that the laser exhibits a complex cross-spiking and cross-relaxation characteristic during the early stage of mode competition. The later start of a mode would cause the cross-spiking and cross-relaxation process, and ultimately the mode started firstly may even not be the one that can be sustained at steady state. To ensure the successful mode selection, the reflectivity of the secondary cavity should be larger than that of the primary cavity, but a too large one would decrease the stable output power of the mode LG01, even to its suppression. The pumping beam distribution has a great influence on the dynamic process and the stable output power of the modes, so the radius and the order of the pumping beam should be optimized. In our case, the optimized beam radius is 0.4 mm, slightly larger than the beam radius of the mode LG00, i.e.0.3 mm, and the optimized order is 4. Moreover, if the laser do not have proper reflectivities of output couplers and pumping beam distribution, the mode selection may not be demonstrated only by optimization of the aperture radius, which would only delay the crossspiking.

© 2020 SPIE.

Number of references:9

Main heading:Laser applications

Controlled terms:Dynamics - Gaussian beams - Optical instruments - Optimization - Pumping (laser) - Reflection - Vortex flow

Uncontrolled terms:Beam distribution - Cross relaxation - Cross-relaxation process - Dual cavity - Laguerre-Gaussian modes - Mode competition - Proper reflectivity - Rate equations model

Classification code:631.1 Fluid Flow, General - 711 Electromagnetic Waves - 744.1 Lasers, General - 744.9 Laser Applications - 921.5 Optimization Techniques - 941.3 Optical Instruments

Numerical data indexing:Size 4.00e-04m

DOI:10.1117/12.2543648

Funding details: Number: 2018JQ6097, Acronym: -, Sponsor: -;Number: 17JK0559, Acronym: -, Sponsor: Scientific Research Plan Projects of Shaanxi Education Department;Number: 61805196, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work is supported by National Natural Science Foundation of China (No.61805196 and No.61803302), Natural Science Basic Research Plan in Shaanxi Province of China (No.2018JQ6097) and Research Plan in Education Department of Shaanxi Province of China ( No.17JK0559).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203209010019

Title:Non-Local Sparse Representation Method for Demosaicing of Single DoFP Polarimetric Image

Authors:Wang, Ruinan (1); Gao, Wei (1); Wang, Fengtao (1); Shen, Chao (1)

Author affiliation:(1) Xi'an Institute of Optics Precision Mechanics of Cas, Space Optics Laboratry, Xi'an, China

Source title:2020 12th International Conference on Communication Software and Networks, ICCSN 2020

Abbreviated source title:Int. Conf. Commun. Softw. Networks, ICCSN

Part number:1 of 1

Issue title:2020 12th International Conference on Communication Software and Networks, ICCSN 2020

Issue date:June 2020

Publication year:2020

Pages:259-263

Article number:9139054

Language:English

ISBN-13:9781728198156

Document type:Conference article (CA)

Conference name:12th International Conference on Communication Software and Networks, ICCSN 2020

Conference date:June 12, 2020 - June 15, 2020

Conference location:Chongqing, China

Conference code:161826

Sponsor:54th Institute; CETC; Chongqing Institute of Electronics; Chongqing University of Posts and Telecommunications; Science and Technology on Communication Networks Laboratory; Sichuan Institue of Electronics

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:The images in different polarization directions collected from division-of-focal-plane (DoFP) imaging system are under-sampled. To solve the demosaicing problem of DoFP imaging, this paper presents a learning model based on sparse representation to optimize the interpolation result of DoFP images. Firstly, image blocks rich in edge or texture information are selected according to the local gradient, and these blocks are clustered based on non-local similarity to learn a sub-dictionary from each class adaptively. The model uses local similarity and sparsity of coding coefficients as regularization terms to minimize coding errors, and then the algorithm iteratively optimizes dictionary atoms and coding coefficients alternately to obtain enhanced images. The experiment takes 8 composed DoFP images as reference and compares the interpolation results of the proposed algorithm with different methods. The proposed method obtains smaller interpolation error than other methods at every image in the experiment.

© 2020 IEEE.

Number of references:19

Main heading:Image enhancement

Controlled terms:Coding errors - Image coding - Interpolation - Iterative methods - Textures

Uncontrolled terms:Interpolation error - Local similarity - Non-local similarities - Polarimetric image - Polarization direction - Regularization terms - Sparse representation - Texture information

Classification code:723.2 Data Processing and Image Processing - 921.6 Numerical Methods

DOI:10.1109/ICCSN49894.2020.9139054

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202308786472

Title:Research on High-Definition and High-Speed Video Transmission Technology Based on Double SDI

Authors:Zhang, Hai Feng (1); Xie, Qing Sheng (1); Wang, Hua (1); Bian, He (1); Feng, Jia (1)

Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; Shannxi, China

Corresponding author:Zhang, Hai Feng(zhanghf99@163.com)

Source title:Advances in Intelligent Systems and Computing

Abbreviated source title:Adv. Intell. Sys. Comput.

Volume:1142

Part number:1 of 1

Issue title:Recent Trends in Decision Science and Management - Proceedings of ICDSM 2019

Issue date:2020

Publication year:2020

Pages:319-325

Language:English

ISSN:21945357

E-ISSN:21945365

ISBN-13:9789811535871

Document type:Conference article (CA)

Conference name:2nd International Conference on Decision Science and Management, ICDSM 2019

Conference date:September 20, 2019 - September 21, 2019

Conference location:Changsha, China

Conference code:240109

Publisher:Springer Science and Business Media Deutschland GmbH

Abstract:High-definition and high-speed raw video data are large, so the traditional GigE and USB 3.0 transmission cannot meet the requirements. Double SDI is used to transmit high-speed video images from front-end high-definition and high-speed camera to back-end receiving equipment for processing. It has the characteristics of low cost, simple interface circuit and private protocol. The key idea and implementation method are to convert a non-standard 2048 * 2025@100fps high-definition and high-speed monochrome image video format into a standard high-definition video format, and use double 3G-SDI interface and coaxial cable for high-speed video transmission. In the whole process, high-speed images in non-standard format can not only maintain the integrity of the original video but also complete correctly. The monochrome 2048 * 2025@100fps raw data are recorded and outputted, which realize the long-distance lossless transmission. The technical route of lossless image transmission in this paper can be effectively applied to other high-definition and high-speed real-time transmission systems.

© Springer Nature Singapore Pte Ltd. 2020.

Number of references:4

Main heading:High speed cameras

Controlled terms:Decision making - Image communication systems - Image processing - Real time systems - Speed - Transmissions

Uncontrolled terms:High definition video - High speed image - High-speed video - High-speed video images - Interface circuits - Monochrome images - Private protocols - Real-time transmissions

Classification code:602.2 Mechanical Transmissions - 722.4 Digital Computers and Systems - 742.2 Photographic Equipment - 912.2 Management

DOI:10.1007/978-981-15-3588-8_39

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580551

Title:Sub-aperture optical system testing by using of a modified simulateous fit method

Authors:Kewei, E. (1); Zhao, Jianke (1); Wang, Tao (1); Wang, Zhengfeng (1); Liu, Kai (1); Chang, Ming (1); Zhou, Yan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 10119, China

Corresponding author:Kewei, E.(ekewei@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11568

Part number:1 of 1

Issue title:AOPC 2020: Optics Ultra Precision Manufacturing and Testing

Issue date:2020

Publication year:2020

Article number:115681C

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639577

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optics Ultra Precision Manufacturing and Testing, AOPC 2020

Conference date:June 29, 2020 - June 30, 2020

Conference location:Shanghai, China

Conference code:165075

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Sub-aperture stitching interferometry can be used for measurement of wavefront of large aperture optical system. A variety of sub-aperture stitching algorithms have been studied to reconstruct the sub-aperture data to obtain full aperture wavefront. The simultaneous fitting method plays an important role among those stitching algorithms which uses a series of global polynomials to accomplish the fitting of the test wavefronts, however, it can only be applied in the case of there have no overlap between each sub-apertures. Therefore, a modified simultaneous fitting method is proposed and is applied to measure the wavefront of large aperture optical system. The proposed algorithm is applicable whether there exists overlap between each sub-aperture or not. The numerical simulation is carried out to evaluate the accuracy of the algorithm. Further, a practical stitching experiment that test an optical system with a diameter of 850mm was implemented to demonstrate the modified algorithm.

© 2020 SPIE. All rights reserved.

Number of references:10

Main heading:Optical systems

Controlled terms:Manufacture - Wavefronts

Uncontrolled terms:Full apertures - Large aperture - Modified algorithms - Simultaneous fitting - Sub-aperture stitching - Sub-aperture stitching interferometries - Sub-apertures

Classification code:537.1 Heat Treatment Processes - 741.3 Optical Devices and Systems

Numerical data indexing:Size 8.50e-01m

DOI:10.1117/12.2579949

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109723777

Title:Remote Sensing Image Color Correction Method Based on Automatic Piecewise Polynomial Method

Authors:Chu, Nan-Qing (1); Li, Xu-Yang (1); Yi, Hong-Wei (1); Ren, Zhi-Guang (1); Ma, Zi-Xuan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xiopm, Xi'an, China

Source title:2020 5th Optoelectronics Global Conference, OGC 2020

Abbreviated source title:Optoelectron. Glob. Conf., OGC

Part number:1 of 1

Issue title:2020 5th Optoelectronics Global Conference, OGC 2020

Issue date:September 7, 2020

Publication year:2020

Pages:161-165

Article number:9260437

Language:English

ISBN-13:9781728198606

Document type:Conference article (CA)

Conference name:5th Optoelectronics Global Conference, OGC 2020

Conference date:September 7, 2020 - September 11, 2020

Conference location:Shenzhen, China

Conference code:165333

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In the process of remote sensing image restoration, color correction is very important. The polynomial algorithmcolor correction method based on standard color card is the most commonly used method. However, the traditional polynomial fitting method needs to determine the most appropriate combination of polynomials, and only one polynomial function fitting method is used. So it is difficult to guarantee high accuracy and good generalization performance at the same time. In order to solve the above problems effectively, this paper proposes an automatic piecewise polynomial fitting method. This study established the mapping between collected RGB value and standard RGB value through the calibration of the X-rite Color Checker, and represented the color difference by computing ?E in CIELab color space. This improved algorithm adopts the idea of segmentation to select the most suitable function in different intervals, and the interval of segmentation is automatically determined by the chromatic aberration standard. The experimental results show that this algorithm has high correction accuracy and this algorithm is more adaptable to photos under different lighting conditions.

© 2020 IEEE.

Number of references:12

DOI:10.1109/OGC50007.2020.9260437

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201108296235

Title:Catalyst-free growth of dense γ-In2Se3 nanosheet arrays and their application in photoelectric detectors

Authors:Kou, Yumeng (1); Chen, Lida (1); Mu, Jianglong (1); Miao, Hui (1); Wang, Yishan (2); Hu, Xiaoyun (1); Teng, Feng (1)

Author affiliation:(1) School of Physics, Northwest University, Xi'an; 710069, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China

Source title:Nanotechnology

Abbreviated source title:Nanotechnology

Volume:31

Issue:19

Issue date:February 20, 2020

Publication year:2020

Article number:195601

Language:English

ISSN:09574484

E-ISSN:13616528

CODEN:NNOTER

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:In this work, a dense γ-In2Se3 nanosheet array has been fabricated using the chemical vapor deposition method under atmospheric pressure. Compared with crystal silicon, the photodetector based on the γ-In2Se3/p-Si heterojunction exhibits a high responsivity (96.7 mA W-1) at the near-infrared region, a presentable current on/off ratio (∼1000) and excellent detectivity (2.03 1012 jones). Simultaneously, the obtained photodetector demonstrated a fast response speed (0.15 ms/0.5 ms) and a broadband sensitive wavelength from ultraviolet (340 nm) to near-infrared (1020 nm). The photoelectric experimental data of the device shows that its high performance is attributed to the high-light absorption capacity of the material, the rational energy band structures of γ-In2Se3 and p-Si, and the effective separation of photo-generated carriers caused by the formed type-II heterojunction. Our work provides the primary experimental basis for the photodetection application of the γ-In2Se3 nanostructure.

© 2020 IOP Publishing Ltd.

Number of references:58

Main heading:Infrared devices

Controlled terms:Atmospheric pressure - Band structure - Chemical vapor deposition - Heterojunctions - Light absorption - Nanosheets - Photodetectors - Photoelectricity - Photons - Silicon

Uncontrolled terms:Absorption capacity - Catalyst-free growth - Chemical vapor deposition methods - Near infrared region - Photoelectric detectors - Photogenerated carriers - Sensitive wavelengths - Type II hetero junctions

Classification code:443.1 Atmospheric Properties - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 802.2 Chemical Reactions - 931.3 Atomic and Molecular Physics - 933 Solid State Physics

Numerical data indexing:Size 1.02e-06m, Size 3.40e-07m

DOI:10.1088/1361-6528/ab674a

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20194307566178

Title:In-situ oxidation fabrication of 0D/2D SnO2/SnS2 novel Step-scheme heterojunctions with enhanced photoelectrochemical activity for water splitting

Authors:Mu, Jianglong (1); Teng, Feng (1); Miao, Hui (1); Wang, Yishan (2); Hu, Xiaoyun (1)

Author affiliation:(1) School of Physics, Northwest University, Xi'an; Shaanxi; 710069, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Hu, Xiaoyun(hxy3275@nwu.edu.cn)

Source title:Applied Surface Science

Abbreviated source title:Appl Surf Sci

Volume:501

Issue date:31 January 2020

Publication year:2020

Article number:143974

Language:English

ISSN:01694332

CODEN:ASUSEE

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:The transfer/separation of interfacial charge carriers relies heavily on the appropriate interfacial contact of heterojunction. In-situ heterojunction will be an effective way for enhancing charge transfer rate since the tight interface, which is conductive to promote the photoelectrochemical or photochemical activity. Herein, 0D/2D SnO2/SnS2 novel Step-scheme (S-scheme) heterojunctions have been successfully constructed by solvothermal method and in-situ oxidation technique through controlling the annealed temperature in N2/H2 atmosphere. The SnS2 nanosheets annealed at 400 °C (SS-400) reveals the highest photocurrent density (0.33 mA cm−2) at 1.23 V vs. RHE under AM 1.5G, that is approximately of 1.9 and 1.2 times than SS-300 (0.17 mA cm−2) and SS-500 (0.27 mA cm−2), respectively. The SS-400 shows the hydrogen and oxygen evolution of 5.5 and 2.7 μmol cm−2h−1, and the corresponding faradaic efficiencies are about 89.4% and 87.7%, respectively. The mainly enhanced reason of SS-400 is that appropriate amount of 0D SnO2 nanoparticles generated on the surfaces and edges of 2D SnS2 nanosheets fabricate the in-situ of S-scheme heterojunctions, which are accelerating the recombination of carriers with relatively weaker redox capacity and promoting the separation of carriers with relatively stronger redox capacity. Meantime, the barrier factor, internal electric field, coulomb interaction, and applied bias factors can also promote the recombination of carriers with weak redox capacity (electrons of SnO2 and holes of SnS2). This work will provide a novel thought for designing and constructing the mechanism of S-scheme heterojunctions for photoelectrochemical water splitting.

© 2019 Elsevier B.V.

Number of references:54

Main heading:Heterojunctions

Controlled terms:Carrier mobility - Charge transfer - Electric fields - Electrochemistry - Fabrication - IV-VI semiconductors - Nanosheets - Oxidation - Semiconducting tin compounds

Uncontrolled terms:0D/2D SnO2/SnS2 - Charge-transfer rate - Faradaic efficiencies - In-situ oxidation - Internal electric fields - Photochemical activity - Photoelectrochemical water splitting - Photoelectrochemicals

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 712.1 Semiconducting Materials - 712.1.2 Compound Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 761 Nanotechnology - 801.4.1 Electrochemistry - 802.2 Chemical Reactions - 933 Solid State Physics

Numerical data indexing:Percentage 8.77e+01%, Percentage 8.94e+01%

DOI:10.1016/j.apsusc.2019.143974

Funding details: Number: 18JK0775, Acronym: -, Sponsor: Scientific Research Foundation of Hunan Provincial Education Department;Number: 2018JM5020,2018JQ2020, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Provincial Department of Education;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: -, Acronym: -, Sponsor: Open Research Fund of State Key Laboratory of Bioelectronics;Number: 21676213,11804274, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China (Grant Nos. 21676213 , 11804274 ). Graduate Innovative and Creativity Fund of Northwest University (Grant No. YZZ17089 ). Natural Science Foundation of Shaanxi Provincial (Grant Nos. 2018JM5020 , 2018JQ2020 ). Education Department of Shaanxi Provincial Government of Scientific Research Foundation China (Grant No. 18JK0775 ). Open Research Fund of State Key Laboratory of Transient Optics and Photonics , Chinese Academy of Sciences (Grant No. SKLST201703 ).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204509451722

Title:A Denoising Method of Remote Sensing Images Based on Improved BM3D

Authors:Chen, Junyu (1); Li, Haiwei (2); Chen, Tieqiao (2); Hu, Bingliang (2); Zhang, Geng (2); Wang, Shuang (2); Liu, Song (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas Xi'an, China and University of Chinese Academy of Sciences, Beijing, China; (2) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China

Source title:ACM International Conference Proceeding Series

Abbreviated source title:ACM Int. Conf. Proc. Ser.

Part number:1 of 1

Issue title:Proceedings of the 4th International Conference on Computer Science and Application Engineering, CSAE 2020

Issue date:October 20, 2020

Publication year:2020

Article number:3425125

Language:English

ISBN-13:9781450377720

Document type:Conference article (CA)

Conference name:4th International Conference on Computer Science and Application Engineering, CSAE 2020

Conference date:October 20, 2020 - October 22, 2020

Conference location:Virtual, Online, China

Conference code:163982

Sponsor:Association for Science and Engineering (ASciE)

Publisher:Association for Computing Machinery, 2 Penn Plaza, Suite 701, New York, NY 10121-0701, United States

Abstract:Denoising of remote sensing images is always one of the hotspots in the field of digital image processing. The quality of denoising determines the precision of subsequent processing directly. The BM3D algorithm takes the high similarity of image neighborhoods into consideration, which shows good stability and accuracy in the field of image denoising. However, in the case of strong noise, BM3D can't match the image-block precisely, which reduces the denoising effect for the remote sensing image. Therefore, in order to solve the problem of BM3D algorithm during the remote sensing image processing, we propose a local block-matching algorithm based on edge search strategy and residual filtering, according to the high similarity at the edge of the remote sensing image. We compare the proposed algorithm with the classic denoising method, and the experimental results show that the proposed algorithm not only protects the information of edge and detail, but also improves the value of PSNR. A better denoising effect was obtained on remote sensing images.

© 2020 ACM.

Number of references:11

Main heading:Image denoising

Controlled terms:Edge detection - Image enhancement - Remote sensing

Uncontrolled terms:Bm3d algorithms - Denoising methods - Edge searches - Good stability - Image blocks - Local block matching - Remote sensing image processing - Remote sensing images

Classification code:716.1 Information Theory and Signal Processing

DOI:10.1145/3424978.3425125

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203409067382

Title:Optimization thermal design method for space cameras based on thermo-optical analysis and Taguchi method

Authors:Zhang, Gaopeng (1, 2); Zhao, Hong (1); Chen, Yaohong (2); Zhang, Guangdong (2); Zhang, Zhi (2); Peng, Jianwei (2); Zhao, Zixin (1); Yan, Aqi (2)

Author affiliation:(1) Xi'an Jiaotong University, State Key Laboratory for Manufacturing Systems Engineering, Xi'an, China; (2) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China

Corresponding author:Zhao, Hong(zhaohong@mail.xjtu.edu.cn)

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:59

Issue:7

Issue date:July 1, 2020

Publication year:2020

Article number:075101

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE

Abstract:Thermal design is highly related to the performance of space cameras as temperature changes cause thermal displacements of the cameras' optical and mechanical systems, consequently affecting imaging quality. However, most existing thermal design methods for space cameras focus on several thermal design parameters without a comprehensive and quantitative analysis. Therefore, we proposed an optimization thermal design method for space cameras based on thermo-optical analysis and the Taguchi method. We first established the thermal balance equations of space cameras, and by analyzing the thermal design parameters in the equations, we identified the key parameters that affect the temperature field, thermal displacements, and imaging quality of the camera. Furthermore, we evaluated the influence of each thermal design parameter on imaging quality based on the integrated thermo-optical analysis. Thereafter, we applied the Taguchi method to quantitatively calculate the effect of each thermal design parameter on imaging quality. Finally, we implemented an optimal thermal control scheme for space cameras based on the results of the Taguchi method. The experimental results demonstrated that the proposed method is reliable and efficient and would be beneficial to researchers working on the thermal design of optical instruments.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).

Number of references:37

Main heading:Temperature indicating cameras

Controlled terms:Machine design - Quality control - Taguchi methods

Uncontrolled terms:Imaging quality - Mechanical systems - Temperature changes - Thermal balance - Thermal control - Thermal design methods - Thermal displacements - Thermo-optical analysis

Classification code:601 Mechanical Design - 742.2 Photographic Equipment - 913.3 Quality Assurance and Control

DOI:10.1117/1.OE.59.7.075101

Funding details: Number: 201906280414, Acronym: CSC, Sponsor: China Scholarship Council;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019JQ-295, Acronym: -, Sponsor: -;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XJJ2018190, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (Nos. 51905529 and 61975161), the Natural Science Basic Research Program of Shaanxi Province (No. 2019JQ-295), the Fundamental Research Funds for the Central Universities (No. XJJ2018190), and the China Scholarship Council Foundation (No. 201906280414). The authors are highly grateful to the editor and the anonymous reviewers for their valuable comments, which improved the presentation of this work.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200908236553

Title:Fault prediction of gas-insulated system with hypersensitive optical monitoring and spectral information

Authors:Ren, Ming (1); Zhang, Chongxing (1); Dong, Ming (1); He, Zhengquan (2)

Author affiliation:(1) State Key Lab of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049; Shaanxi Province, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710049; Shaanxi Province, China

Corresponding author:Ren, Ming(renming@xjtu.edu.cn)

Source title:International Journal of Electrical Power and Energy Systems

Abbreviated source title:Int J Electr Power Energy Syst

Volume:119

Issue date:July 2020

Publication year:2020

Article number:105945

Language:English

ISSN:01420615

CODEN:IEPSDC

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:Hazardous discharge is the primary threat to power apparatus. Utilizing the fact that discharge is companied by intrinsic light radiation in specific spectral bands, a micro ternary spectral hypersensitive sensor array is developed for condition monitoring and fault prediction. With this new concept, a multispectral diagnosis strategy is proposed and implemented on a gas-insulated system, demonstrating significant potential for fault classification as well as quantitative risk evaluation, circumventing the necessities of phase-resolved statistics and complex denoising algorithms which are the most challenging but necessary aspects for traditional discharge diagnosis. Thus, it is an intrinsic and stable approach for practical fault prediction, especially for HVDC gas-insulated system.

© 2020 Elsevier Ltd

Number of references:16

Main heading:Condition monitoring

Controlled terms:Computer aided diagnosis - Forecasting - HVDC power transmission - Insulating materials - Petroleum reservoir evaluation

Uncontrolled terms:De-noising algorithm - Diagnosis strategies - Fault classification - Fault prediction - Gas insulated systems - HVDC - Quantitative risk evaluations - Spectral information

Classification code:413 Insulating Materials - 461.1 Biomedical Engineering - 512.1.2 Petroleum Deposits : Development Operations - 706.1.1 Electric Power Transmission

DOI:10.1016/j.ijepes.2020.105945

Funding details: Number: 2018YFB0904400, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 51877171, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Key Research and Development Program of China , China (Grant Nos. 2018YFB0904400 ) and the National Natural Science Foundation of China , China (Grant Nos. 51877171 ).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201308334270

Title:A Hybrid Demosaicking Algorithm for Area Scan Industrial Camera Based on Fuzzy Edge Strength and Residual Interpolation

Authors:Sun, Bangyong (1, 2); Yuan, Nianzeng (1); Zhao, Zhe (1)

Author affiliation:(1) School of Printing, Packaging and Digital Media, Xi'an University of Technology, Xi'an; 10048, China; (2) Key Laboratory of Spectral Imaging Technology of China Academy of Science, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 7119, China

Corresponding author:Sun, Bangyong(sunbangyong@xaut.edu.cn)

Source title:IEEE Transactions on Industrial Informatics

Abbreviated source title:IEEE Trans. Ind. Inf.

Volume:16

Issue:6

Issue date:June 2020

Publication year:2020

Pages:4038-4048

Article number:8930999

Language:English

ISSN:15513203

E-ISSN:19410050

Document type:Journal article (JA)

Publisher:IEEE Computer Society

Abstract:Area scan cameras are widely used in industrial manufacturing for quality controlling, production monitoring, or defect inspection. The area scan cameras are normally integrated in a single sensor covered by the Bayer color filter array for RGB signal capturing, and the raw image with one channel for each pixel is obtained in one exposure. Therefore, it is significant to reconstruct the other two channels at each pixel which is called demosaicking. In this article, one hybrid demosaicking algorithm is proposed based on fuzzy edge strength and residual interpolation (RI) method. We first demosaic the G channel with one edge-directed filter and refine the high textured details by using fuzzy edge strength interpolation. Then, the RI is employed to calculate R and B channels, where G is used as the guide image for computing residuals. In the experiment, we evaluate our proposed method with nine prevalent interpolation-based algorithms on the IMAX and Kodak image datasets. The experimental results demonstrate that the proposed algorithm outperform the others by synthesizing the performance in peak signal-to-noise ratio, structural similarity, visual comparison, and computational time.

© 2005-2012 IEEE.

Number of references:30

Main heading:Fuzzy filters

Controlled terms:Cameras - Image coding - Interpolation - Pixels - Quality control - Signal to noise ratio - Textures

Uncontrolled terms:Bayer color filter array - Demosaicking - edge strength - Fuzzy membership - residual interpolation (RI)

Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 742.2 Photographic Equipment - 913.3 Quality Assurance and Control - 921.6 Numerical Methods

DOI:10.1109/TII.2019.2959069

Funding details: Number: 2019M653784, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 18JS068, Acronym: -, Sponsor: -;Number: 201805037YD15CG21-8, Acronym: -, Sponsor: -;

Funding text:Manuscript received July 8, 2019; revised September 17, 2019 and November 6, 2019; accepted December 2, 2019. Date of publication December 11, 2019; date of current version February 28, 2020. This work was supported in part by China Postdoctoral Science Foundation under Grant 2019M653784, in part by the Xi’an Science and Technology Research Plan under Grant 201805037YD15CG21-8, and in part by the Key Laboratory of Printing and Packaging of Shaan’Xi Province under Grant 18JS068. Paper no. TII-19-3074. (Corresponding author: Bangyong Sun.) B. Sun is with the School of Printing, Packaging and Digital Media, Xi’an University of Technology, Xi’an 710048, China, and also with the Key Laboratory of Spectral Imaging Technology of China Academy of Science, Xi’an Institute of Optics and Precision Mechanics, Xi’an 7119, China (e-mail: sunbangyong@xaut.edu.cn).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203108996646

Title:Off-axis pumped Hermite-Gaussian mode solid-state laser????(Open Access)

Title of translation:离轴抽运厄米-高斯模固体激光器????(Open Access)

Authors:Lian, Tian-Hong (1); Wang, Shi-Yu (2); Kou, Ke (1); Liu, Yun (1)

Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China

Corresponding author:Lian, Tian-Hong(thlian@xaut.edu.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:69

Issue:11

Issue date:June 5, 2020

Publication year:2020

Article number:114202

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences

Abstract:To study the modes' pattern and the modes' competition behavior of an off-axis pumped solid-state laser, a small signal approximation method is derived, which simplifies the multiple-mode differential equations into liner algebraic equations. When the pump beam radius is small, the higher-order Hermite-Gaussian modes emerge successively with the off-axis displacement increasing, while the pattern evolution shows some complexity when the pump radius is larger. The percentage of the modes with a small pump power near the threshold, calculated with the small signal method, is close to that calculated at a higher pump power by directly solving the rate equations numerically. This indicates that we can estimate the modes' pattern of an actual high power laser by using the small signal method. For a multiple Hermite-Gaussian modes off-axis pumped solid state laser, as the pump power increases, the photon number of the mode increases linearly as its net gain becomes positive, while that of the second mode with a smaller net gain does not increase immediately as it becomes positive successively. Larger pump power is required until the photon number begins to increase. The increasing slope of first mode decreases as the second mode begins to grow. The dynamics of the modes' competition presents cross spiking and cross relaxation process before they become stable. Moreover, the outputs of the modes HG00-HG50 are experimentally demonstrated, and the spot evolution with the off-axis displacement agrees very well with the calculated result.

© 2020 Chinese Physical Society.

Number of references:21

Main heading:Pumping (laser)

Controlled terms:Algebra - Differential equations - Gaussian distribution - High power lasers - Photons - Solid state lasers

Uncontrolled terms:Algebraic equations - Competition behavior - Cross-relaxation process - Hermite Gaussian modes - Multiple modes - Pattern evolution - Rate equations - Small signal approximation

Classification code:744.1 Lasers, General - 744.4 Solid State Lasers - 921.1 Algebra - 921.2 Calculus - 922.1 Probability Theory - 931.3 Atomic and Molecular Physics

DOI:10.7498/aps.69.20200086

Funding details: Number: 61805195,61805196, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 17JK0559, Acronym: -, Sponsor: Education Department of Shaanxi Province;Number: 2018JQ6097, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;

Funding text:* Project supported by the National Natural Science Foundation of China (Grant Nos. 61805196, 61805195), the Natural Science Basic Research Plan of Shaanxi Province, China (Grant No. 2018JQ6097), and the Scientific Research Program Funded by Shaanxi Provincial Education Department, China (Grant No. 17JK0559). † Corresponding author. E-mail: thlian@xaut.edu.cnProject supported by the National Natural Science Foundation of China (Grant Nos. 61805196, 61805195), the Natural Science Basic Research Plan of Shaanxi Province, China (Grant No. 2018JQ6097), and the Scientific Research Program Funded by Shaanxi Provincial Education Department, China (Grant No. 17JK0559).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Hybrid Gold

Accession number:20202808913832

Title:A Method to Improve the Positioning Accuracy of the Intersection of two Planes

Authors:Lian, Xuezheng (1); Xie, Meilin (1)

Author affiliation:(1) Chinese Academy of Sciences, Photoelectric Tracking Xi'an, Institute of Optics and Precision Mechanics, Xi'an, China

Source title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Abbreviated source title:IEEE Int. Conf. Electron. Technol., ICET

Part number:1 of 1

Issue title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Issue date:May 2020

Publication year:2020

Pages:776-780

Article number:9119651

Language:English

ISBN-13:9781728162836

Document type:Conference article (CA)

Conference name:3rd IEEE International Conference on Electronics Technology, ICET 2020

Conference date:May 8, 2020 - May 12, 2020

Conference location:Chengdu, China

Conference code:161271

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:As the payload of the reconnaissance aircraft, the positioning accuracy of the airborne photoelectric platform is the key to whether the weapon can achieve accurate strike and whether the battlefield information can be obtained accurately. This paper introduces the structure of the photoelectric measurement pod, establishes the auxiliary coordinate system of the positioning model. According to the homogeneous coordinate transformation method, rotates and transforms the parallax vector of two machines into the unified coordinate system, and completes the solution of the target according to the principle of space intersection. Combined with the disadvantages of traditional rendezvous positioning algorithm, an improved algorithm is proposed. Based on the model, the error factors affecting the positioning accuracy are determined, which provides theoretical guidance for engineering application. The simulation results show that the improved algorithm is better than the traditional algorithm.

© 2020 IEEE.

Number of references:8

Main heading:Reconnaissance aircraft

Controlled terms:Aircraft accidents - Geometrical optics - Photoelectricity - Vector spaces

Uncontrolled terms:Battlefield information - Co-ordinate system - Engineering applications - Homogeneous coordinate transformations - Photo-electric platform - Photoelectric measurements - Positioning accuracy - Positioning algorithms

Classification code:652.1 Aircraft, General - 741.1 Light/Optics - 921 Mathematics

DOI:10.1109/ICET49382.2020.9119651

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204409407085

Title:Research on Double Closed-loop Trajectory Tracking Control Algorithm of Wheeled Mobile Robot Based on Global Stability

Authors:Su, Yunhao (1); Liang, Yanbing (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, University of Chinese Academy of Sciences, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China

Source title:Proceedings - 2020 12th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2020

Abbreviated source title:Proc. - Int. Conf. Intell. Human-Mac. Syst. Cybern., IHMSC

Volume:1

Part number:1 of 2

Issue title:Proceedings - 2020 12th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2020

Issue date:August 2020

Publication year:2020

Pages:180-183

Article number:9204281

Language:English

ISBN-13:9781728165165

Document type:Conference article (CA)

Conference name:12th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2020

Conference date:August 22, 2020 - August 23, 2020

Conference location:Virtual, Hangzhou, China

Conference code:163320

Sponsor:IEEE Nanjing Section CIS Chapter

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In this paper, a double closed-loop trajectory tracking control system with inner and outer loop structure is designed for a two-wheeled mobile robot, where the outer loop is the position subsystem and the inner loop is the attitude subsystem. Sliding mode control is adopted for attitude control design. This paper uses hyperbolic tangent function to design the position control, which can make position tracking system satisfy the Lipschitz condition, thus ensuring that the double-loop trajectory tracking control is globally stable. Through simulation, we prove that this method can improve that the effect of trajectory tracking control very well, especially in the initial stage of control.

© 2020 IEEE.

Number of references:8

Main heading:Mobile robots

Controlled terms:Attitude control - Hyperbolic functions - Man machine systems - Navigation - Sliding mode control - Tracking (position) - Trajectories

Uncontrolled terms:Double closed loop - Global stability - Hyperbolic tangent function - Lipschitz conditions - Position tracking system - Trajectory tracking control - Two wheeled mobile robot - Wheeled mobile robot

Classification code:731 Automatic Control Principles and Applications - 921 Mathematics

DOI:10.1109/IHMSC49165.2020.00048

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201608460698

Title:Hyperspectral imaging and analysis for sketch painting

Authors:Wu, Yinhua (1, 2); Wang, Pengchong (2); Wang, Shuang (2); Liu, Jun (1); Gao, Ming (1); Wei, Ruyi (2); Gao, Xiaohui (2)

Author affiliation:(1) School of Optoelectronics Engineering, Xi'an Technological University, Xi'an, China; (2) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Gao, Xiaohui(gaoxhui@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:212

Issue date:June 2020

Publication year:2020

Article number:164686

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:Spectral analysis is a practical analytical technique suitable for the study of painting. Especially hyperspectral imaging has gradually become a hot research topic in the scientific analysis of painting relics, due to its characteristics such as non-invasive, non-contact, fast imaging and high spectral resolution. It is mainly used to extract the intrinsic information that is difficult to observe in painting with naked eyes. In this study, two seemingly identical sketch paintings served as samples, one was painted with a 2B pencil, the other with a 4B pencil. A ground-based hyperspectral imager was used to obtain the hyperspectral data cube for the two sketch paintings in the range of 390 nm–1025 nm. And the two paintings were analyzed and compared in terms of spectral characteristics. Results indicated that hyperspectral imaging greatly facilitates the acquisition of the diagnostic spectral characteristics of different materials in painting. And the specific target in paintings can be effectively identified through hyperspectral analysis, which is of great help to painting identification. At the same time, DC characteristics and detail characteristics of the painting can be extracted, which are helpful for the researchers to analyze the painting style. In brief, it is further proved that the hyperspectral imaging has significant scientific and practical value in the protection and preservation of painting relics.

© 2020 Elsevier GmbH

Number of references:27

Main heading:Hyperspectral imaging

Controlled terms:Painting - Spectral resolution - Spectroscopy - Spectrum analysis

Uncontrolled terms:DC characteristics - High spectral resolution - Hot research topics - Hyperspectral analysis - Hyperspectral Data - Hyperspectral imagers - Scientific analysis - Spectral characteristics

Classification code:741.1 Light/Optics - 813.1 Coating Techniques

DOI:10.1016/j.ijleo.2020.164686

Funding details: Number: 11727806, Acronym: -, Sponsor: -;Number: LSIT201902W, Acronym: -, Sponsor: -;Number: 201701M9001, Acronym: -, Sponsor: -;Number: 61905275, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the Open Research Fund of Key Laboratory of Spectral Imaging Technology of the Chinese Academy of Sciences [grant number LSIT201902W , LSIT201802G ]; the National Natural Science Foundation of China [grant number 61905275 ]; the National Major Research and Development Program of Scientific Instruments of China [grant number 11727806 ]; and the Aeronautics Science Foundation [grant number 201701M9001 ].

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204609480816

Title:Research on control algorithm of flexible manipulator based on PD-Type distributed parameter boundary control

Authors:Su, Yunhao (1); Liang, Yanbing (2)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, University of Chinese Academy of Sciences, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China

Source title:Proceedings - International Conference on Artificial Intelligence and Electromechanical Automation, AIEA 2020

Abbreviated source title:Proc. - Int. Conf. Artif. Intell. Electromechanical Autom., AIEA

Part number:1 of 1

Issue title:Proceedings - International Conference on Artificial Intelligence and Electromechanical Automation, AIEA 2020

Issue date:June 2020

Publication year:2020

Pages:508-511

Article number:9221266

Language:English

ISBN-13:9781728182889

Document type:Conference article (CA)

Conference name:2020 International Conference on Artificial Intelligence and Electromechanical Automation, AIEA 2020

Conference date:June 26, 2020 - June 28, 2020

Conference location:Tianjin, China

Conference code:164003

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In this paper, the Hamilton method is used to establish a distributed parameter model for a single-link flexible robotic arm based on the form of partial differential equations. The distributed parameter system is used to control the model. The boundary control method is used to add a boundary control input to the end boundary of the manipulator. The PD boundary controller is designed, and the distributed parameter boundary control based on the exponential convergence method is performed on the end boundary of the manipulator to adjust the vibration of the robotic arm. The Lyapunov function is designed to prove the stability of the system through calculation.

© 2020 IEEE.

Number of references:8

Main heading:Distributed parameter control systems

Controlled terms:Industrial manipulators - Lyapunov functions - Manipulators - Robotic arms - Robotics - System stability

Uncontrolled terms:Boundary control methods - Boundary controls - Distributed parameter - Distributed parameter systems - Distributed-parameter model - Exponential convergence - Flexible robotics - Single link

Classification code:731 Automatic Control Principles and Applications - 921 Mathematics - 961 Systems Science

DOI:10.1109/AIEA51086.2020.00114

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210809954863

Title:Research on Adaptive Sliding Mode Robust Control Algorithm of Manipulator Based on RBF Neural Network

Authors:Tian, Hua (1); Liang, Yanbing (2)

Author affiliation:(1) University of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China

Source title:Proceedings - 2020 Chinese Automation Congress, CAC 2020

Abbreviated source title:Proc. - Chin. Autom. Congr., CAC

Part number:1 of 1

Issue title:Proceedings - 2020 Chinese Automation Congress, CAC 2020

Issue date:November 6, 2020

Publication year:2020

Pages:4625-4629

Article number:9327630

Language:English

ISBN-13:9781728176871

Document type:Conference article (CA)

Conference name:2020 Chinese Automation Congress, CAC 2020

Conference date:November 6, 2020 - November 8, 2020

Conference location:Shanghai, China

Conference code:166835

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:This paper proposes a new algorithm for manipulator system - an adaptive sliding mode robust control algorithm based on RBF neural network. Based on the traditional sliding mode control method, the RBF neural network is used to approximate the manipulator model information and external interference. We established the system model of the six-degree-of-freedom manipulator XIOPM developed by our research group. In order to verify the effectiveness and superiority of the algorithm in the simplest possible case, we took the models of the first two joints and performed it through MTALAB. The simulation results are consistent with our expectations. Compared with the movement of the manipulator under traditional sliding mode control, our method can not only make the actual output trajectory of the manipulator system converge to the desired trajectory at a relatively faster speed, but also reduce chattering to a large extent. The control algorithm reduce the disadvantages of traditional sliding mode control. Its good tracking performance and tracking accuracy make this manipulator system well controlled.

© 2020 IEEE.

Number of references:11

Main heading:Adaptive control systems

Controlled terms:Degrees of freedom (mechanics) - Manipulators - Radial basis function networks - Robust control - Sliding mode control

Uncontrolled terms:Adaptive sliding mode - Desired trajectories - External interference - Manipulator systems - Model informations - RBF Neural Network - Six degree-of-freedom - Tracking performance

Classification code:731 Automatic Control Principles and Applications - 731.1 Control Systems - 931.1 Mechanics

DOI:10.1109/CAC51589.2020.9327630

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210910006569

Title:Beyond Rectangle Boundingbox: Visual Tracking Using Characteristic Points

Authors:Zhang, Ximing (1); Fan, Xuewu (1); Luo, Shujuan (2)

Author affiliation:(1) Space Optical Research Lab, Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an, China; (2) Northwestern Polytechnical University, Xi'an, China

Source title:2020 IEEE 6th International Conference on Computer and Communications, ICCC 2020

Abbreviated source title:IEEE Int. Conf. Comput. Commun., ICCC

Part number:1 of 1

Issue title:2020 IEEE 6th International Conference on Computer and Communications, ICCC 2020

Issue date:December 11, 2020

Publication year:2020

Pages:1466-1470

Article number:9345078

Language:English

ISBN-13:9781728186351

Document type:Conference article (CA)

Conference name:6th IEEE International Conference on Computer and Communications, ICCC 2020

Conference date:December 11, 2020 - December 14, 2020

Conference location:Chengdu, China

Conference code:167151

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Visual Tracking plays a key role in computer vision application and artificial intelligent research. The main representation of tracking results come to rectangle boundingbox leading to inaccurate performance, which may not meet the requirements of computer vision application nowadays. We are more likely to obtain the pose estimation of tracking objects in order to achieve more complex computer vision mission including behavior detection and video analysis. While, rectangle boundingbox representation mostly dominates the output model when describing the target appearance in existing DNN-based trackers, leading to precision. We introduce the characteristic points(ChaPoints) to represent the both feature extraction and output model in order to accomplish pose estimation during training and tracking procedure. To this end, we build the mapping method between our proposed characteristic points and rectangle boundingbox. The multi-branches Siamese networks can further matching the candidates and the templates for final tracking results. We extensively prove the effectiveness of the proposed method through the ablation studies of the tracking benchmark, including OTB-2015 and UAV123.

© 2020 IEEE.

Number of references:21

Main heading:Object tracking

Controlled terms:Aircraft detection - Computer vision - Geometry

Uncontrolled terms:Artificial intelligent - Behavior detection - Characteristic point - Computer vision applications - Mapping method - Pose estimation - Tracking objects - Visual Tracking

Classification code:716.2 Radar Systems and Equipment - 723.5 Computer Applications - 921 Mathematics

DOI:10.1109/ICCC51575.2020.9345078

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20195207931183

Title:D-A type (dfppy)2Ir(pic-TPA) complex containing fluorinated pyridine-2-carboxylate ligand and triphenylamine: synthesis, photophysics and bioactivity

Authors:Bai, Dan (1, 2); Chen, Kai (3); Shi, Haitao (4); Peng, Xiao (5); Zhang, Xiaoxiao (6); Zheng, Xuyang (7); Ren, Hongtao (8); Qu, Junle (5)

Author affiliation:(1) Xi'an Institute of Flexible Electronics (IFE) & Xi'an Key Laboratory of Flexible Electronics (KLoFE), MIIT Key Laboratory of Flexible Electronics (KLoFE), Shaanxi Key Laboratory of Flexible Electronics (KLoFE), Northwestern Polytechnical University (NPU), Xi'an; Shaanxi; 710129, China; (2) Xi'an Institute of Biomedical Materials and Engineering (IBME) & Xi'an Key Laboratory of Biomedical Materials and Engineering (KLBME), Northwestern Polytechnical University (NPU), Xi'an; Shaanxi; 710129, China; (3) College of Pharmacy, Xi'an Jiaotong University, Xi'an; Shaanxi; 710061, China; (4) Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an; Shaanxi Province; 710004, China; (5) Institute of Optoelectronics, Shenzhen University, Guangzhou; 518060, China; (6) Department of Microbiology, School of Preclinical Medicine, the Fourth Military Medical University, Xi'an; 710032, China; (7) Department of Infectious Diseases, Tangdu Hospital, The Fourth Military Medical University, Xi' an; Shaanxi; 710038, China; (8) Department of Radiotherapy Oncology, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an; Shaanxi Province; 710061, China

Corresponding author:Bai, Dan(iamdbai@nwpu.edu.cn)

Source title:Applied Organometallic Chemistry

Abbreviated source title:Appl. Organomet. Chem.

Volume:34

Issue:2

Issue date:February 1, 2020

Publication year:2020

Article number:e5320

Language:English

ISSN:02682605

E-ISSN:10990739

CODEN:AOCHEX

Document type:Journal article (JA)

Publisher:John Wiley and Sons Ltd

Abstract:A novel Ir (III) complex (dfppy)2Ir(pic-TPA) containing fluorinated phenylpyridine and pyridine-2-carboxylate ancillary ligand was synthesized according to rational design, its photophysical properties and therapeutical activities examined. Radiosensitization SER values (1.63-1.65) were observed even in radio-resistant cell lines after treatment with this complex. Furthermore, the complexes have shown antiviral activity against HSV-2 DNA virus. Comply with sub-cellular distribution imaging results and molecular docking calculations and cell cytometry analysis, this Ir (III) complex demonstrated functions as promising microviscosiy and micropolarity imaging probe, also as a prodrug for combinatorial therapy of radiochemo and antiviral treatment.

© 2019 John Wiley & Sons, Ltd.

Number of references:29

Main heading:Iridium compounds

Controlled terms:Carboxylation - Cell culture - Chelation - Ligands - Photophysics - Pyridine - Synthesis (chemical) - Viruses

Uncontrolled terms:antiviral - Donor-acceptor pairs - Iridium complex - Molecular rotors - Radiosensitizers

Classification code:461.9 Biology - 801.4 Physical Chemistry - 802.2 Chemical Reactions - 804.1 Organic Compounds

DOI:10.1002/aoc.5320

Funding details: Number: LGF19H200005, Acronym: -, Sponsor: Natural Science Foundation of Zhejiang Province;Number: 国卫‐2018920, Acronym: -, Sponsor: -;Number: 81601553, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work is supported by the Natural Science Foundation of China (81601553), the Natural Science Foundation of Zhejiang Province (LGF19H200005), and the Japan China Medical Association (国卫‐2018920).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508383657

Title:An improved method for 3D reconstruction based on uniform point drift registration estimation

Authors:Zhang, Fan (1); Wang, Xin (1); Hu, Chao (1); Qu, YouShan (2)

Author affiliation:(1) China Academy of Launch Vehicle Technology, Beijing, China; (2) Xi'an Institute of Optics and Precision Mechanics, Xi'an, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11437

Part number:1 of 1

Issue title:2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications

Issue date:2020

Publication year:2020

Article number:114370B

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636521

Document type:Conference article (CA)

Conference name:2019 International Conference on Optical Instruments and Technology: Advanced Laser Technology and Applications

Conference date:October 26, 2019 - October 28, 2019

Conference location:Beijing, China

Conference code:158574

Sponsor:China Instrument and Control Society (CIS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:It is indispensable to obtain more information such as the 3D structure of the space target by detecting and identifying the target, when complete the on-orbit servicing and on-orbit control tasks. Both lidar and binocular stereo vision can provide three dimensional information of the environment. But it is very sensitive to the illuminance of environment and difficult to image registration at weak texture region, when we are using the binocular stereo vision in space. And lidar also has some defects such as the lidar data is sparse and the scanning frequency is low. So lidar and binocular stereo vision should be used together. The data of the lidar and binocular stereo vision are fused to make up for each others flaws. In this paper, uniform point drift registration method is used in the fusion of point cloud which is sampled by lidar and binocular stereo vision. In this method, the two groups of point cloud are considered as one which submit to mixed probability distribution and the other one which is sampled from the points submit to mixed probability distribution. The transformation estimation between the two groups of the point cloud is maximum likelihood estimation. The transformation is required to take overall smoothness. In other words, the point clouds should be uniformed. The uniform point drift method can solve the registration problem efficiently for 3D reconstruction. Usually the time can be compressed by 10%.

© 2020 SPIE.

Number of references:10

Main heading:Stereo vision

Controlled terms:Image reconstruction - Laser applications - Maximum likelihood estimation - Optical instruments - Optical radar - Orbits - Stereo image processing - Textures

Uncontrolled terms:3D reconstruction - Binocular stereo vision - Registration methods - Registration problems - Scanning frequency - Three-dimensional information - Transformation estimation - Uniform Point Drift

Classification code:716.2 Radar Systems and Equipment - 723.2 Data Processing and Image Processing - 723.5 Computer Applications - 744.9 Laser Applications - 922 Statistical Methods - 941.3 Optical Instruments

Numerical data indexing:Percentage 1.00e+01%

DOI:10.1117/12.2543198

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204809552585

Title:Calculation and analysis of flexibility matrix for v flexible spherical hinges with chamfer

Authors:Bao, Chaonan (1); Jiang, Bo (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, CAS University of Chinese Academy of Sciences, Xi'an, China

Corresponding author:Bao, Chaonan(baochaonan7@163.com)

Source title:Proceedings - 2020 5th International Conference on Electromechanical Control Technology and Transportation, ICECTT 2020

Abbreviated source title:Proc. - Int. Conf. Electromechanical Control Technol. Transp., ICECTT

Part number:1 of 1

Issue title:Proceedings - 2020 5th International Conference on Electromechanical Control Technology and Transportation, ICECTT 2020

Issue date:May 2020

Publication year:2020

Pages:97-101

Article number:9237585

Language:English

ISBN-13:9781728199283

Document type:Conference article (CA)

Conference name:5th International Conference on Electromechanical Control Technology and Transportation, ICECTT 2020

Conference date:May 15, 2020 - May 17, 2020

Conference location:Virtual, Nanchang, China

Conference code:164345

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:A new type of chamfering V flexible spherical hinge is designed. Based on the second theorem and calculus theory of material mechanics, the formula of flexibility matrix of chamfering flexible spherical hinge is deduced by energy method, and an example is used to verify the results in finite element method. The error between theoretical solution and finite element solution is less than 10%, which verifies its correctness. The structural parameters affecting the flexibility are analyzed, and it is concluded that the flexibility increases with the length of the flexible spherical hinge or the chamfer radius R, but decreases with the increase of the minimum thickness and the angle between V type and x axis. And the change of the minimum thickness has the most obvious influence on the flexibility.

© 2020 IEEE.

Number of references:9

Main heading:Spheres

Controlled terms:Calculations - Hinges

Uncontrolled terms:Calculus theories - Finite element solution - Flexibility matrices - Material mechanics - Minimum thickness - Spherical hinges - Structural parameter - Theoretical solutions

Classification code:921 Mathematics

Numerical data indexing:Percentage 1.00e+01%

DOI:10.1109/ICECTT50890.2020.00029

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508399354

Title:A novel S-scheme MoS2/CdIn2S4 flower-like heterojunctions with enhanced photocatalytic degradation and H2 evolution activity

Authors:Zhang, Bin (1); Shi, Huanxian (1); Hu, Xiaoyun (2); Wang, Yishan (3); Liu, Enzhou (1); Fan, Jun (1)

Author affiliation:(1) School of Chemical Engineering, Northwest University, Xi'an; 710069, China; (2) School of Physics, Northwest University, Xi'an; 710069, China; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China

Source title:Journal of Physics D: Applied Physics

Abbreviated source title:J Phys D

Volume:53

Issue:20

Issue date:May 13, 2020

Publication year:2020

Article number:205101

Language:English

ISSN:00223727

E-ISSN:13616463

CODEN:JPAPBE

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:A novel flower-like MoS2/CdIn2S4 composite was designed and synthesized via a simple in-situ hydrothermal method, for the first time. Under visible light irradiation, the 10% MoS2/CdIn2S4 hybrid exhibited the strongest photocatalytic activities for both degradation of dye (Rhodamine B) and hydrogen generation. The RhB (10 mg L-1) can be almost degraded in 30 min, and the degradation rate constant (k) of 10% MoS2/CdIn2S4 can up to 0.13595 min-1, which is about 2.6 and 73.1 times to CdIn2S4 (0.05311 min-1) and MoS2 (0.00186 min-1). Under simulated sunlight irradiation, the hydrogen evolution rate of 10% MS/CIS can reach to 1868.19 μmol•g-1•h-1, which is 2.26 and 6.2 times higher than that of the pure CdIn2S4 (827.09 μmol•g-1•h-1) and MoS2 (303.1 μmol•g-1•h-1), respectively. Additionally, the 10% MS/CIS exhibits a superior stability in the recycling experiment. The enhanced photocatalytic performance can be attributed to that the in-situ loading of MoS2 on the CdIn2S4 can provide the larger surface area, strengthen the visible-light response range and accelerate the charge separation. A conceivable S-scheme charge transfer mechanism was proposed to reveal the photocatalytic reaction process in this system.

© 2020 IOP Publishing Ltd.

Number of references:71

Main heading:Boron compounds

Controlled terms:Cadmium compounds - Charge transfer - Degradation - Heterojunctions - Hydrogen production - Indium compounds - Irradiation - Layered semiconductors - Light - Molybdenum compounds - Photocatalytic activity - Photodegradation - Rate constants - Rhodamine B - Rhodium compounds

Uncontrolled terms:Charge transfer mechanisms - Degradation rate constants - Hydrogen evolution rate - Photo catalytic degradation - Photocatalytic performance - Photocatalytic reactions - Situ hydrothermal methods - Visible-light irradiation

Classification code:522 Gas Fuels - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 802.2 Chemical Reactions

Numerical data indexing:Mass_Density 1.00e-02kg/m3, Time 1.80e+03s

DOI:10.1088/1361-6463/ab7563

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202908946747

Title:Design and analysis of a moving mirror supporting mechanism for fourier transform spectroscopy

Authors:Tian, Feifei (1, 2); Li, Siyuan (1)

Author affiliation:(1) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China

Corresponding author:Li, Siyuan(lsy@opt.ac.cn)

Source title:Proceedings - 2020 3rd International Conference on Electron Device and Mechanical Engineering, ICEDME 2020

Abbreviated source title:Proc. - Int. Conf. Electron Device Mech. Eng., ICEDME

Part number:1 of 1

Issue title:Proceedings - 2020 3rd International Conference on Electron Device and Mechanical Engineering, ICEDME 2020

Issue date:May 2020

Publication year:2020

Pages:540-544

Article number:9122097

Language:English

ISBN-13:9781728181455

Document type:Conference article (CA)

Conference name:3rd International Conference on Electron Device and Mechanical Engineering, ICEDME 2020

Conference date:May 1, 2020 - May 3, 2020

Conference location:Suzhou, China

Conference code:161422

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Moving mirror supporting mechanism is a key component of Fourier transform spectrometer(FTS), its motion precision and the maximum range of travel affect the performance of the instrument. Based on the double parallelogram structure, a symmetrical flexible moving mirror supporting mechanism is designed. Simulation results show the system permits ± 5 mm of mirror travel with the tilt value of less than ±4.8urad and the shear value of less than 3um. Excellent shear performance and tilt performance make it well suited for most FTS instruments.

© 2020 IEEE.

Number of references:9

Main heading:Spacecraft instruments

Controlled terms:Electron devices - Fourier transform infrared spectroscopy - Mirrors - Spectrometers

Uncontrolled terms:Design and analysis - Fourier transform spectrometers - Fourier transform spectroscopy - Maximum ranges - Motion precision - Moving mirrors - Shear performance - Supporting mechanisms

Classification code:655.1 Spacecraft, General - 741.3 Optical Devices and Systems - 801 Chemistry

DOI:10.1109/ICEDME50972.2020.00129

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109716240

Title:A wide-band interference spectrometer based on bandpass sampling technology

Authors:Tian, Feifei (1, 2); Li, Siyuan (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China

Corresponding author:Li, Siyuan(lsy@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11606

Part number:1 of 1

Issue title:ICOSM 2020: Optoelectronic Science and Materials

Issue date:2020

Publication year:2020

Article number:116060V

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510640429

Document type:Conference article (CA)

Conference name:2020 International Conference on Optoelectronic Science and Materials, ICOSM 2020

Conference date:September 25, 2020 - September 27, 2020

Conference location:Hefei, China

Conference code:165961

Sponsor:AEIC Academic Exchange Information Centre; National University of Defense Technology; University of Science and Technology of China

Publisher:SPIE

Abstract:In the process of wide-band spectrum detection, interferogram acquisition of the traditional Michelson interferometer needs to follow Nyquist sampling theorem, the static performance such as high resolution of moving mirror scanning and the dynamic performance such as transient response need to meet strict requirements, which usually make the spectrometer system structure complex. Meanwhile, the interference modulation efficiency of traditional Michelson interferometer will drop sharply with the increase of optical path difference(OPD). In this way, the interference data value at the long optical path difference will be submerged by noise, which will reduce the signal-to-noise ratio of reconstructed spectrum. In order to simultaneously achieve spectrum detection with wide-band spectrum, high resolution and high signal-to-noise ratio, this paper introduces a configuration of wide-band interference spectrometer based on band-pass sampling technology. The wide-band interference spectrometer includes dispersion unit and interference modulation unit. Firstly, the dispersion unit pre-disperses the wide spectrum into continuous spectrum distributed along wavelength and divides the interference modulation signal of continuous spectrum into several interference signals of narrow-band spectrum. Secondly, the interference modulation unit carries out interference modulation on the dispersed continuous spectrum and the interferograms of every narrow-band spectrum are sampled and obtain the interferogram sequence of every narrow-band spectrum according to the band-pass sampling theorem. Finally, the spectral distribution of the detection target can be obtained by data processing and spectral superposition. The interference spectrometer provides a new idea for the development of spectral detection with wide spectral range, high resolution and high signalto- noise ratio.

© 2020 SPIE.

Number of references:8

Main heading:Modulation

Controlled terms:Data handling - Dielectric losses - Dispersion (waves) - Interferometry - Michelson interferometers - Signal sampling - Signal to noise ratio - Spectrometers - Transient analysis

Uncontrolled terms:Dynamic performance - High signal-to-noise ratio - Interference modulation - Interference spectrometer - Nyquist sampling theorem - Optical path difference - Spectral distribution - Wide-band interference

Classification code:708.1 Dielectric Materials - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 741.3 Optical Devices and Systems - 941.3 Optical Instruments - 941.4 Optical Variables Measurements

DOI:10.1117/12.2585504

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202608877341

Title:Olivine-norite rock detected by the lunar rover Yutu-2 likely crystallized from the SPA-impact melt pool????(Open Access)

Authors:Lin, Honglei (1); He, Zhiping (2); Yang, Wei (1); Lin, Yangting (1); Xu, Rui (2); Zhang, Chi (1); Zhu, Meng-Hua (3); Chang, Rui (1); Zhang, Jinhai (1); Li, Chunlai (2); Lin, Hongyu (4); Liu, Yang (5); Gou, Sheng (6); Wei, Yong (1); Hu, Sen (1); Xue, Changbin (7); Yang, Jianfeng (8); Zhong, Jie (9); Fu, Xiaohui (10); Wan, Weixing (1); Zou, Yongliao (5)

Author affiliation:(1) Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing; 100029, China; (2) Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China; (3) State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, China; (4) Beijing Institute of Space Mechanics and Electricity, Beijing; 100076, China; (5) State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing; 100190, China; (6) State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing; 100101, China; (7) Key Laboratory of Electronics and Information Technology for Space System, National Space Science Center, Chinese Academy of Sciences, Beijing; 100190, China; (8) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (9) Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China; (10) Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai; 264209, China

Corresponding author:Lin, Yangting(linyt@mail.iggcas.ac.cn)

Source title:National Science Review

Abbreviated source title:Natl. Sci. Rev.

Volume:7

Issue:5

Issue date:April 17, 2020

Publication year:2020

Pages:913-920

Language:English

ISSN:20955138

E-ISSN:2053714X

Document type:Journal article (JA)

Publisher:Oxford University Press

Abstract:Chang'E-4 landed in the South Pole-Aitken (SPA) basin, providing a unique chance to probe the composition of the lunar interior. Its landing site is located on ejecta strips in Von Kármán crater that possibly originate from the neighboring Finsen crater. A surface rock and the lunar regolith at 10 sites along the rover Yutu-2 track were measured by the onboard Visible and Near-Infrared Imaging Spectrometer in the first three lunar days of mission operations. In situ spectra of the regolith have peak band positions at 1 and 2 μm, similar to the spectral data of Finsen ejecta from the Moon Mineralogy Mapper, which confirms that the regolith's composition of the landing area is mostly similar to that of Finsen ejecta. The rock spectrum shows similar band peak positions, but stronger absorptions, suggesting relatively fresh exposure. The rock may consist of 38.1 ± 5.4% low-Ca pyroxene, 13.9 ± 5.1% olivine and 48.0 ± 3.1% plagioclase, referred to as olivine-norite. The plagioclase-abundant and olivine-poor modal composition of the rock is inconsistent with the origin of the mantle, but representative of the lunar lower crust. Alternatively, the rock crystallized from the impact-derived melt pool formed by the SPA-impact event via mixing the lunar crust and mantle materials. This scenario is consistent with fast-cooling thermal conditions of a shallow melt pool, indicated by the fine to medium-sized texture (<3 mm) of the rock and the SPA-impact melting model [Icarus 2012; 220: 730-43].

© 2020 The Author(s) 2019. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.

Number of references:49

Main heading:Lunar missions

Controlled terms:Absorption spectroscopy - Feldspar - Infrared devices - Lakes - Lunar surface analysis - Olivine - Rocks - Structural geology - Textures - Thermography (imaging)

Uncontrolled terms:Band position - Lunar interior - Lunar regolith - Mission operations - Modal composition - South Pole-Aitken - Thermal condition - Visible and near infrared

Classification code:481.1 Geology - 482.2 Minerals - 742.1 Photography

Numerical data indexing:Size 1.00e-06m, Size 2.00e-06m

DOI:10.1093/nsr/nwz183

Funding details: Number: 11941001,41490631,41525016,41902318, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: QYZDJ-SSW-DQC001, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: Z181100002918003, Acronym: -, Sponsor: Beijing Municipal Science and Technology Commission;

Funding text:This work was supported by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (QYZDJ-SSW-DQC001), the National Natural Science Foundation of China (41902318, 41490631, 41525016, 11941001) and the Beijing Municipal Science and Technology Commission (Z181100002918003).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Hybrid Gold

Accession number:20210309786047

Title:Real Time Detection and Identification of UAV Abnormal Trajectory

Authors:Wang, Ziyuan (1, 2); Zhang, Geng (1); Hu, Bingliang (1); Feng, Xiangpeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China

Source title:ACM International Conference Proceeding Series

Abbreviated source title:ACM Int. Conf. Proc. Ser.

Part number:1 of 1

Issue title:Proceedings of the 2020 3rd International Conference on Artificial Intelligence and Pattern Recognition, AIPR 2020

Issue date:June 26, 2020

Publication year:2020

Pages:51-56

Language:English

ISBN-13:9781450375511

Document type:Conference article (CA)

Conference name:3rd International Conference on Artificial Intelligence and Pattern Recognition, AIPR 2020

Conference date:June 26, 2020 - June 28, 2020

Conference location:Virtual, Online, China

Conference code:165952

Publisher:Association for Computing Machinery

Abstract:Abnormal behavior detection based on video sequence is a hot field. At the same time, monitoring and tracking the UAV (Unmanned Aerial Vehicle) and identifying its abnormal behavior are great significance for the UAV defense. This paper focuses on the detection and recognition of the UAV abnormal trajectory based on real-time video sequence. By tracking and analyzing the characteristics of the UAV, the detection and recognition of abnormal trajectory are divided into two stages. First, by analyzing the UAV's abnormal trajectory satisfying the change conditions is extracted by the quantitative analysis of the UAV's directional angle change features. Second, the normalized polar path fourier spectrum feature of abnormal trajectory is established, and the feature is combined with window search length to accelerate the classification and identification of the UAV trajectory types. Through the contrast experiment, it shows that the method in this paper has good real-time performance and accuracy for trajectory recognition with scale and translation changes.

© 2020 ACM.

Number of references:16

Main heading:Aircraft detection

Controlled terms:Antennas - Artificial intelligence - Pattern recognition - Signal detection - Spectrum analysis - Trajectories - Unmanned aerial vehicles (UAV) - Video recording

Uncontrolled terms:Abnormal behavior detections - Change conditions - Classification and identifications - Contrast experiment - Monitoring and tracking - Real time performance - Real-time detection - UAV (unmanned aerial vehicle)

Classification code:652.1 Aircraft, General - 716 Telecommunication; Radar, Radio and Television - 723.4 Artificial Intelligence

DOI:10.1145/3430199.3430212

Funding details: Number: 2019392, Acronym: -, Sponsor: Youth Innovation Promotion Association;Number: J19-014, Acronym: -, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported in part by Youth Innovation Promotion Association, CAS(NO.2019392), and by Light in the west of Chinese Academy of Sciences(J19-014).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202508854619

Title:Asymmetric localization and symmetric diffraction-free transmission in synthetic photonic lattice with anti-parity-time symmetry

Authors:Dai, Yanan (1, 2); Wen, Zengrun (1, 2); Ji, Kaiwen (1, 2); Liu, Zhenjuan (1, 2); Wang, Haohao (1, 2); Zhang, Zhiqing (1, 2); Gao, Yuanmei (4); Lu, Baole (2); Wang, Yishan (3); Qi, Xinyuan (1, 2); Bai, Jintao (2)

Author affiliation:(1) School of Physics, Northwest University, Xi'an; 710127, China; (2) State Key Laboratory of Photoelectric Technology and Functional Materials, International Joint Research Center on Photoelectric Technology and Functional Nanomaterials, Northwest University, Xi'an; 710069, China; (3) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) College of Physics and Electronics, Shandong Normal University, Jinan; 250014, China

Corresponding author:Qi, Xinyuan(qixycn@nwu.edu.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:45

Issue:11

Issue date:June 1, 2020

Publication year:2020

Pages:3099-3102

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:We study, to the best of our knowledge, the first observations of light propagation in synthetic photonic lattice with anti-parity-time symmetry by tuning the gain or loss of two coupled fiber rings alternatively and corresponding phase distribution periodically. By tuning the phase &straightphi; and the wave number Q in the lattice, asymmetric transmission of the light field can be achieved for both long and short loops when &straightphi; 6= nπ/2 (n is an integer). Further investigations demonstrate that asymmetric localization of the light field in the long loop and symmetric diffraction-free transmission in two loops can both be realized by changing these two parameters. Our work provides a new method to obtain anti-parity-time symmetry in synthetic photonic lattice and paves a broad way to achieve novel optical manipulation in photonic devices.

© 2020 Optical Society of America

Number of references:24

Main heading:Optical lattices

Controlled terms:Diffraction - Light transmission - Photonic devices - Photonics - Transmissions

Uncontrolled terms:Asymmetric transmissions - Light fields - Optical manipulation - Parity-time symmetries - Phase distribution - Two parameter - Wave numbers

Classification code:602.2 Mechanical Transmissions - 741.1 Light/Optics - 744.8 Laser Beam Interactions

DOI:10.1364/OL.392436

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203809211625

Title:Research on High Precision Permanent Magnet Servo Control System of Airborne Stable Platform

Authors:Yu, Cao (1); Xiuqin, Su (2); Haitao, Wang (1); Meilin, Xie (1); Feng, Jing (1); Junfeng, Han (1); Peng, Liu (1)

Author affiliation:(1) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi; 030006, China; (2) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China

Source title:Proceedings of 2020 IEEE 5th Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Abbreviated source title:Proc. IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC

Part number:1 of 1

Issue title:Proceedings of 2020 IEEE 5th Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Issue date:June 2020

Publication year:2020

Pages:413-416

Article number:9141862

Language:English

ISBN-13:9781728143224

Document type:Conference article (CA)

Conference name:5th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Conference date:June 12, 2020 - June 14, 2020

Conference location:Chongqing, China

Conference code:161902

Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Harbin Section

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:At present, airborne optoelectronic pod system develops rapidly and is widely used in military and civil fields. The stable platform control system is the key part of the photoelectric pod, which is used to isolate the disturbance of the body and the external environment, maintain the stability of the LOS and ensure the clear imaging of the sensor. In general, the model of airborne electro-optical stabilization platform can not be obtained accurately, and the characteristics of the system itself are affected by the external environment. At the same time, the noise interference such as torque and sensor actuator is also uncertain. In order to solve the above-mentioned uncertainty and improve the stability accuracy of the system, this paper takes the servo system of a two axis airborne photoelectric stability platform as the research object, uses SVPWM technology to complete the hardware and software design with DSP + FPGA as the control core, uses FOG and POS as speed and position sensors. And it aims at mechanical resonance, to design a digital notch filter to restrain it. Finally, the experiment shows that when the swing amplitude is 8.5°, frequency is 0.3Hz, the stability accuracy reaches 0.005° (3\sigma). The experiment shows that the stable platform control system has the advantages of fast response speed and high stability accuracy.

© 2020 IEEE.

Number of references:6

Main heading:Control system stability

Controlled terms:Control systems - Notch filters - Permanent magnets - Photoelectricity - Software design - Stability

Uncontrolled terms:External environments - Hardware and software designs - Mechanical resonance - Noise interference - Position sensors - Sensor actuators - Servo control systems - Stable platform

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 703.2 Electric Filters - 704.1 Electric Components - 723.1 Computer Programming - 731.1 Control Systems - 731.4 System Stability

Numerical data indexing:Frequency 3.00e-01Hz

DOI:10.1109/ITOEC49072.2020.9141862

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201908611065

Title:Spectral-Spatial Attention Network for Hyperspectral Image Classification

Authors:Sun, Hao (1); Zheng, Xiangtao (1); Lu, Xiaoqiang (1); Wu, Siyuan (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:5

Issue date:May 2020

Publication year:2020

Pages:3232-3245

Article number:8909379

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:Hyperspectral image (HSI) classification aims to assign each hyperspectral pixel with a proper land-cover label. Recently, convolutional neural networks (CNNs) have shown superior performance. To identify the land-cover label, CNN-based methods exploit the adjacent pixels as an input HSI cube, which simultaneously contains spectral signatures and spatial information. However, at the edge of each land-cover area, an HSI cube often contains several pixels whose land-cover labels are different from that of the center pixel. These pixels, named interfering pixels, will weaken the discrimination of spectral-spatial features and reduce classification accuracy. In this article, a spectral-spatial attention network (SSAN) is proposed to capture discriminative spectral-spatial features from attention areas of HSI cubes. First, a simple spectral-spatial network (SSN) is built to extract spectral-spatial features from HSI cubes. The SSN is composed of a spectral module and a spatial module. Each module consists of only a few 3-D convolution and activation operations, which make the proposed method easy to converge with a small number of training samples. Second, an attention module is introduced to suppress the effects of interfering pixels. The attention module is embedded into the SSN to obtain the SSAN. The experiments on several public HSI databases demonstrate that the proposed SSAN outperforms several state-of-The-Art methods.

© 1980-2012 IEEE.

Number of references:54

Main heading:Pixels

Controlled terms:Convolution - Convolutional neural networks - Geometry - Image classification - Sanitary sewers - Spectroscopy

Uncontrolled terms:Adjacent pixels - Classification accuracy - Spatial attention - Spatial features - Spatial informations - Spectral signature - State-of-the-art methods - Training sample

Classification code:452.1 Sewage - 716.1 Information Theory and Signal Processing - 921 Mathematics

DOI:10.1109/TGRS.2019.2951160

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61806193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2017B26, Acronym: -, Sponsor: -;

Funding text:Manuscript received August 17, 2019; revised October 13, 2019; accepted October 22, 2019. Date of publication November 21, 2019; date of current version April 22, 2020. This work was supported in part by the National Key R&D Program of China under Grant 2017YFB0502900, in part by the National Natural Science Foundation of China under Grant 61806193 and Grant 61772510, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, under Grant SKLST2017010, in part by the CAS "Light of West China" Program under Grant XAB2017B26, and in part by the Xi’an Postdoctoral Innovation Base Scientific Research Project. (Corresponding author: Xiangtao Zheng.) H. Sun is with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China, and also with the University of Chinese Academy of Sciences, Beijing 100049, China.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201208319148

Title:A Joint Relationship Aware Neural Network for Single-Image 3D Human Pose Estimation

Authors:Zheng, Xiangtao (1); Chen, Xiumei (1); Lu, Xiaoqiang (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Image Processing

Abbreviated source title:IEEE Trans Image Process

Volume:29

Issue date:2020

Publication year:2020

Pages:4747-4758

Article number:8995784

Language:English

ISSN:10577149

E-ISSN:19410042

CODEN:IIPRE4

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:This paper studies the task of 3D human pose estimation from a single RGB image, which is challenging without depth information. Recently many deep learning methods are proposed and achieve great improvements due to their strong representation learning. However, most existing methods ignore the relationship between joint features. In this paper, a joint relationship aware neural network is proposed to take both global and local joint relationship into consideration. First, a whole feature block representing all human body joints is extracted by a convolutional neural network. A Dual Attention Module (DAM) is applied on the whole feature block to generate attention weights. By exploiting the attention module, the global relationship between the whole joints is encoded. Second, the weighted whole feature block is divided into some individual joint features. To capture salient joint feature, the individual joint features are refined by individual DAMs. Finally, a joint angle prediction constraint is proposed to consider local joint relationship. Quantitative and qualitative experiments on 3D human pose estimation benchmarks demonstrate the effectiveness of the proposed method.

© 1992-2012 IEEE.

Number of references:62

Main heading:Learning systems

Controlled terms:Convolutional neural networks - Deep learning

Uncontrolled terms:3D human pose estimation - Depth information - dual attention module - Human bodies - Joint angle - Learning methods - Qualitative experiments - Single images

DOI:10.1109/TIP.2020.2972104

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: XAB2017B26, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;

Funding text:Manuscript received August 18, 2019; revised January 8, 2020; accepted February 2, 2020. Date of publication February 12, 2020; date of current version March 4, 2020. This work was supported in part by the National Natural Science Found for Distinguished Young Scholars under Grant 61925112, in part by the National Key R&D Program of China under Grant 2017YFB0502900, in part by the National Natural Science Foundation of China under Grant 61806193, Grant 61702498, and Grant 61772510, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences (CAS) under Grant QYZDB-SSW-JSC015, and in part by the CAS "Light of West China" Program under Grant XAB2017B26 and Grant XAB2017B15. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Jiwen Lu. (Corresponding author: Xiaoqiang Lu.) Xiangtao Zheng and Xiaoqiang Lu are with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China (e-mail: luxq666666@gmail.com).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202808913838

Title:Single Space Object Image Super Resolution Reconstructing Using Convolutional Networks in Wavelet Transform Domain

Authors:Feng, Xubin (1); Su, Xiuqin (1); Xu, Zhengpu (2); Xie, Meilin (1); Liu, Peng (1); Lian, Xuezheng (1); Jing, Feng (1); Cao, Yu (1)

Author affiliation:(1) Chinese Academy of Sciences, Photoelectric Tracking Xi'an, Institute of Optics and Precision Mechanics, Xi'an, China; (2) Xidian University, Computer Science, Xi'an, China

Source title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Abbreviated source title:IEEE Int. Conf. Electron. Technol., ICET

Part number:1 of 1

Issue title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Issue date:May 2020

Publication year:2020

Pages:862-866

Article number:9119660

Language:English

ISBN-13:9781728162836

Document type:Conference article (CA)

Conference name:3rd IEEE International Conference on Electronics Technology, ICET 2020

Conference date:May 8, 2020 - May 12, 2020

Conference location:Chengdu, China

Conference code:161271

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:With the increasing importance of space exploration, the research of space object is becoming more and more important because high-quality space object images are meaning for space attack and defense confrontation. However, high-quality space object images are very difficult to obtain because of the large number of various rays in the space environment and the inadequacy of optical lenses and detectors on satellites to support high-resolution imaging. Image super resolution reconstruction methods are the most cost-effective way to solve the problem. In this paper, we propose a deep convolutional neural network based method to improve the resolution of space object image. The implementation of our method is in wavelet transform domain rather than spatial domain because wavelet transformation could decompose different frequencies of the image very effectively and this could further more enhance the performance. The experiment result shows that our method could achieve a very good performance.

© 2020 IEEE.

Number of references:16

Main heading:Image reconstruction

Controlled terms:Convolution - Convolutional neural networks - Cost effectiveness - Deep neural networks - Image compression - Image enhancement - Lenses - Optical resolving power - Space research - Wavelet transforms

Uncontrolled terms:Convolutional networks - Different frequency - High-resolution imaging - Image super resolutions - Image super-resolution reconstruction - Space explorations - Wavelet transformations - Wavelet-transform domain

Classification code:656.2 Space Research - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 911.2 Industrial Economics - 921.3 Mathematical Transformations

DOI:10.1109/ICET49382.2020.9119660

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203809211462

Title:Research on real-time distance measurement of mobile eye tracking system based on neural network

Authors:Hu, Ling (1, 2); Gao, Jiarui (1)

Author affiliation:(1) University of Chinese Academy of Sciences, Beijing, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Source title:Proceedings of 2020 IEEE 5th Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Abbreviated source title:Proc. IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC

Part number:1 of 1

Issue title:Proceedings of 2020 IEEE 5th Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Issue date:June 2020

Publication year:2020

Pages:1561-1565

Article number:9141800

Language:English

ISBN-13:9781728143224

Document type:Conference article (CA)

Conference name:5th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Conference date:June 12, 2020 - June 14, 2020

Conference location:Chongqing, China

Conference code:161902

Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Harbin Section

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:With the development and application of eye-tracking technology, mobile eye-tracking systems have become more widely used due to their safety and portability. We combine eye-tracking systems with real-time object detection using machine learning. We propose a method of wearing an eye tracker in daily life to obtain the distance between the eye tracking system and the gaze target in real time. During the visual interaction of the eye tracking system, in order to obtain the distance from the eyeball fixation target to the eyeball in real time, the world camera of the mobile eye tracking system pupil labs first collects the position and scale information of the detected target image in real time, and uses camera calibration principle, pinhole camera model and camera distortion model to establish a ranging equation, and then the feasibility of the real-time ranging equation is verified through a specified distance experiment. The total average relative error after de-distortion at the position of 50cm-75cm is reduced to 1.25%, and the highest accuracy-0.9182cm distance measurement can be achieved within the effective distance.

© 2020 IEEE.

Number of references:12

Main heading:Eye tracking

Controlled terms:Neural networks - Object detection - Object tracking - Pinhole cameras - Real time systems - Target tracking

Uncontrolled terms:Average relative error - Development and applications - Distance experiment - Eye tracking systems - Eye tracking technologies - Mobile eye-tracking - Pin-hole camera models - Visual interaction

Classification code:722.4 Digital Computers and Systems - 723.2 Data Processing and Image Processing - 742.2 Photographic Equipment

Numerical data indexing:Percentage 1.25e+00%, Size 5.00e-01m to 7.50e-01m

DOI:10.1109/ITOEC49072.2020.9141800

Funding details: Number: -, Acronym: -, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;

Funding text:This work was supported by the Youth Innovation Promotion Foundation of Chinese Academy of Sciences.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20194807737204

Title:Modified eigenvector-based feature extraction for hyperspectral image classification using limited samples

Authors:Wang, Wenning (1, 2, 3); Mou, Xuanqin (2); Liu, Xuebin (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an, China; (2) School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an, China; (3) School of Information Science and Engineering, Shandong Agricultural University, Tai’an; Shandong, China

Corresponding author:Wang, Wenning(wwn812@stu.xjtu.edu.cn)

Source title:Signal, Image and Video Processing

Abbreviated source title:Signal Image Video Process.

Volume:14

Issue:4

Issue date:June 1, 2020

Publication year:2020

Pages:711-717

Language:English

ISSN:18631703

E-ISSN:18631711

Document type:Journal article (JA)

Publisher:Springer Science and Business Media Deutschland GmbH

Abstract:Classical supervised feature extraction methods, such as linear discriminant analysis (LDA) and nonparametric weighted feature extraction (NWFE), and search for projection directions through which the ratio of a between-class scatter matrix to a within-class scatter matrix can be maximized. The two feature extraction methods can obtain good classification results when training samples are sufficient; however, the effect is nonideal when samples are insufficient. In this study, the eigenvector spectra of LDA and NWFE are modified using spectral distribution information, which is locally unstable under the condition of a few samples. Experiments demonstrate that the proposed method outperforms several conventional feature extraction methods.

© 2019, Springer-Verlag London Ltd., part of Springer Nature.

Number of references:16

Main heading:Extraction

Controlled terms:Discriminant analysis - Eigenvalues and eigenfunctions - Feature extraction - Image classification - Spectroscopy

Uncontrolled terms:Between class scatter - Classification results - Feature extraction methods - Linear discriminant analysis - Nonparametric weighted feature extractions - Spectral distribution - Supervised feature extractions - Within-class scatter matrix

Classification code:802.3 Chemical Operations - 922 Statistical Methods

DOI:10.1007/s11760-019-01604-3

Funding details: Number: 61501456, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding was provided by the National Natural Science Foundation of China (Grant No. 61501456). Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205209684136

Title:Electromagnetic Performance of the Novel Hybrid-Pole Permanent Magnet Machines for High Peak Torque Density????(Open Access)

Authors:Liu, Yu-Xi (1); Cao, Ji-Wei (2); Gao, Qin-He (1); Liu, Zhi-Hao (1); Lu, Ya-Chao (3); Sun, Zhi-Yin (2)

Author affiliation:(1) Institute of Armament Launch Theory and Technology, Xi'An Research Institute of High Technology, Xi'an, China; (2) Department of Electrical Engineering, Harbin Institute of Technology, Harbin, China; (3) Department of Electrical Engineering, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China

Corresponding author:Gao, Qin-He(849852677@qq.com)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:220384-220393

Article number:9288804

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:This paper proposes two novel hybrid rotors permanent magnet (PM) machines for the high torque density in short duration condition operation. In order to enhance the torque performance, the flux concentrated structure of spoke-type PM is employed to increase the air-gap flux density. Meanwhile, the non-magnetic connector of the rotor is employed to eliminate the magnetic flux leakage. The rotors of the conventional machines and the proposed machines are optimized by the finite element analysis (FEA). Furthermore, based on the comparisons of electromagnetic performances for the optimized machines, including the open-circuit flux density, torque, PM eddy current loss, overload capability, the characteristics of the proposed machines are analyzed. The results indicate that the proposed machine can improve the torque at rated and overload operation with growth rate 14.3% and 13.1%, respectively. Finally, a 12-slots/10-pole PM machine is prototyped and FEA is to be validated.

© 2013 IEEE.

Number of references:28

Main heading:Permanent magnets

Controlled terms:Electric machinery - Magnetic leakage - Torque

Uncontrolled terms:Air gap flux density - Conventional machines - Eddy current-loss - Electromagnetic performance - High torque density - Magnetic flux leakage - Overload capability - Permanent-magnet machine

Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 704.1 Electric Components - 931.2 Physical Properties of Gases, Liquids and Solids

Numerical data indexing:Percentage 1.31e+01%, Percentage 1.43e+01%

DOI:10.1109/ACCESS.2020.3043432

Funding details: Number: 51877053, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ487, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 20190412, Acronym: SUST, Sponsor: Shaanxi University of Science and Technology;Number: 51807039,51905541, Acronym: -, Sponsor: Young Scientists Fund;

Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 51877053, in part by the Young Scientists Fund of the National Natural Science Foundation of China under Grant 51807039, in part by the research supported by the National Natural Science Foundation of China under Grant 51905541, in part by the Natural Science Basic Research Plan in Shaanxi Province of China under Grant 2020JQ487, and in part by the Young Talent Fund of University Association for Science and Technology in Shaanxi under Grant 20190412.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20201608418587

Title:In-plane micro-displacement measurement based on secondary diffraction????(Open Access)

Authors:Liu, Shengrun (1, 2); Xue, Bin (1); Yu, Jirui (1, 2); Xu, Guangzhou (1); Lv, Juan (1); Cheng, Ying (1); Yang, Jianfeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China

Corresponding author:Yang, Jianfeng(1914147269@qq.com)

Source title:AIP Advances

Abbreviated source title:AIP Adv.

Volume:10

Issue:4

Issue date:April 1, 2020

Publication year:2020

Article number:045203

Language:English

E-ISSN:21583226

Document type:Journal article (JA)

Publisher:American Institute of Physics Inc.

Abstract:For precision machinery, the measurement of the relative in-plane displacement of two parallel planes that are separated by several meters is important. In this paper, a theoretical model for measuring the relative in-plane microdisplacement between two parallel planes was developed on the basis of secondary diffraction. Based on this method, we employed a pinhole and a circular-ring as the diffraction screens. The influence of the structural parameters of diffraction screens on the secondary diffraction pattern was analyzed in detail, and the obtained parameters were then used in the experimental measurements. For experimental investigation, a laser beam at 532 nm was used to irradiate a pinhole; the diffracted light was then further diffracted using a circular-ring, and the final diffraction pattern was recorded using a CCD camera. The circular-ring was mounted on the plane to be measured, while the pinhole and the CCD camera remained stationary; the space between the pinhole and the circular-ring was set at 1200 mm. The displacement of the circular-ring can be calculated by comparing the central position of the two diffraction patterns before and after shifting the circular-ring. Over a measurement range of 0-90 μm, the absolute error in the displacement measurement was less than 1.97 μm.

© 2020 Author(s).

Number of references:19

Main heading:Displacement measurement

Controlled terms:CCD cameras - Diffraction patterns - Interferometry - Laser beams - Machinery - Pinhole cameras

Uncontrolled terms:Experimental investigations - In-plane displacement - Measurement range - Micro displacement measurements - Precision machinery - Secondary diffraction patterns - Structural parameter - Theoretical modeling

Classification code:742.2 Photographic Equipment - 744.8 Laser Beam Interactions - 941.4 Optical Variables Measurements - 943.2 Mechanical Variables Measurements

Numerical data indexing:Size 0.00e+00m to 9.00e-05m, Size 1.20e+00m, Size 1.97e-06m, Size 5.32e-07m

DOI:10.1063/1.5143339

Funding details: Number: XAB2017A10, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;

Funding text:This work was supported by the Chinese Academy of Sciences "Light of West China" Program under Grant No. XAB2017A10.This work was supported by the Chinese Academy of Sciences Light of West China? Program under Grant No. XAB2017A10.*%blankline%*

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:5963775

Title:New Insight Into Lunar Regolith-Forming Processes by the Lunar Rover Yutu-2

Authors:Lin, Honglei (1); Lin, Yangting (1); Yang, Wei (1); He, Zhiping (2); Hu, Sen (1); Wei, Yong (1); Xu, Rui (2); Zhang, Jinhai (1); Liu, Xiaohui (3); Yang, Jianfeng (4); Xing, Yan (5); Yu, Chengwu (5); Zou, Yongliao (6)

Author affiliation:(1) Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; (2) Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, China; (3) Beijing Aerospace Control Center, Beijing, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (5) Beijing institute of control engineering, Beijing, China; (6) State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China

Corresponding author:Lin, Yangting(linyt@mail.iggcas.ac.cn)

Source title:Geophysical Research Letters

Abbreviated source title:Geophys. Res. Lett.

Volume:47

Issue:14

Issue date:July 28, 2020

Publication year:2020

Article number:e2020GL087949

Language:English

ISSN:00948276

E-ISSN:19448007

CODEN:GPRLAJ

Document type:Journal article (JA)

Publisher:Blackwell Publishing Ltd

Abstract:The Yutu-2 rover of the Chang'E-4 spacecraft observed many meter-sized shallow pits fully covered with small fragments, distinct from the typical rock-free impact craters with comparable sizes in the landing area. The unique morphology of the pits and the visible and near-infrared spectra of the fragments suggest that the fragments are broken pieces of impact melt-conglutinated regolith breccia projectiles, which were excavated from preexisting craters. The rareness of rock on the landing area surface suggests that the preexisting craters were probably small in size (e.g., <60 m in diameter), not large enough to penetrate the thick regolith (~12 m) and to excavate the beneath rock breccia and/or bedrock. The presence of the impact melts was confirmed by the glass-like spectra of some fragments with unusually high albedo and blue-green tint in the centers of the pits. These observations reveal the gardening and consolidating processes on the Moon.

©2020. American Geophysical Union. All Rights Reserved.

Number of references:42

Controlled terms:albedo - bedrock - breccia - crater - geomorphology - Moon - regolith - spacecraft

Classification code:71.2.8 Landforms of other planets - 72.17.1 Moon

DOI:10.1029/2020GL087949

Funding details: Number: 41430105, Acronym: NSFC;NNSF;NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41490631, Acronym: NSFC;NNSF;NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41525016, Acronym: NSFC;NNSF;NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41902318, Acronym: NSFC;NNSF;NNSFC, Sponsor: National Natural Science Foundation of China;

Funding text:The Chang'E-4 mission was carried out by the Chinese Lunar Exploration Program, and the scientific data are provided by China National Space Administration. The authors are grateful to the Editor and James Head and Katherine Joy and an anonymous reviewer for their constructive reviews. This work was supported by NSFC (41902318, 41430105, 41490631, 41525016), the Beijing Municipal Science and Technology Commission (Z181100002918003) and Key Research Program of Frontier Sciences, CAS (QYZDJ-SSW-DQC001). Honglei Lin and Sen Hu also acknowledge the support of the Key Research Program of the Institute of Geology and Geophysics, CAS (IGGCAS-201905).

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203309042055

Title:Diverse rock types detected in the lunar south pole-aitken basin by the Chang'E-4 lunar mission

Authors:Huang, Jun (1, 2); Xiao, Zhiyong (2, 3, 4); Xiao, Long (1, 2, 4); Horgan, Briony (5); Hu, Xiaoyi (1); Lucey, Paul (6); Xiao, Xiao (1); Zhao, Siyuan (1); Qian, Yuqi (1); Zhang, Hao (1); Li, Chunlai (7); Xu, Rui (7); He, Zhiping (7); Yang, Jianfeng (8); Xue, Bin (8); He, Qi (1); Zhong, Jie (9); Lin, Hongyu (10); Huang, Changning (10); Xie, Jianfeng (11)

Author affiliation:(1) State Key Laboratory of Geological Processes and Mineral Resources, Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, Hubei; 430074, China; (2) Chinese Academy of Sciences (CAS) Center for Excellence in Comparative Planetology, Hefei, Anhui; 230026, China; (3) Planetary Environmental and Astrobiological Laboratory, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong; 519000, China; (4) State Key Laboratory of Lunar and Planetary Sciences, Space Science Institute, Macau University of Science and Technology, Macau; 999078, China; (5) Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette; IN; 47907, United States; (6) Hawai'i Institute of Geophysics and Planetology, University of Hawai'i at Manoa, Honolulu; HI; 96822, United States; (7) Key Laboratory of Space Active Opto-Electronics Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China; (8) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (9) Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China; (10) Institute of Space Mechanics and Electricity, China Academy of Space Technology, Beijing; 100086, China; (11) Beijing Aerospace Flight Control Center, Beijing; 100094, China

Corresponding author:Huang, Jun(junhuang@cug.edu.cn)

Source title:Geology

Abbreviated source title:Geology

Volume:48

Issue:7

Issue date:2020

Publication year:2020

Pages:723-727

Language:English

ISSN:00917613

E-ISSN:19432682

CODEN:GLGYBA

Document type:Journal article (JA)

Publisher:Geological Society of America

Abstract:The South Pole-Aitken (SPA) basin, located between the South Pole and Aitken crater on the far side of the Moon, is the largest confirmed lunar impact structure. The pre-Nectarian SPA basin is a 2400 x 2050 km elliptical structure centered at 53°S, 191°E, which should have exposed lower crust and upper mantle due to the enormous excavation depth. Olivine, the dominant mineral in Earth's mantle, has only been identified in small and localized exposures in the margins of the SPA basin, and the dominant mafic component is, instead, pyroxene. These mineralogical characteristics could be explained by the recent hypothesis that the lunar upper mantle is dominated by low-calcium pyroxene, not olivine. Here, we present observations from imaging and spectral data from China's Chang'E-4 (CE-4) lunar mission in the first 4 synodic days, especially the first in situ visible/near-infrared spectrometer observations of an exposed boulder. We identified a variety of rock types, but not the recently reported olivine-rich materials in the landing region. The results are consistent with orbital observations. The obtained mineralogical information provides a better understanding of the nature and origin of SPA materials.

© 2020 Geological Society of America.

Number of references:34

Main heading:Lunar missions

Controlled terms:Olivine - Orbits - Poles - Structural geology

Uncontrolled terms:Earth's mantle - Elliptical structures - Impact structures - Low-calcium pyroxenes - Lunar south pole - Olivine-rich materials - South Pole-Aitken - Spectral data

Classification code:408.2 Structural Members and Shapes - 481.1 Geology - 482.2 Minerals

Numerical data indexing:Size 2.05e+06m

DOI:10.1130/G47280.1

Funding details: Number: XDA17010403, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: D020101, Acronym: -, Sponsor: -;Number: 41773063,41772050,41773061,41830214, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 0042/2018/A2,121/2017/A3, Acronym: -, Sponsor: -;

Funding text:This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (grant XDA17010403), the Natural Science Foundation of China (grants 41773061, 41772050, 41830214, 41773063), the China National Space Administration (CNSA) Pre-research Project on Civil Aerospace Technologies (grant D020101), and the Science and Technology Development Fund of Macau (grants 121/2017/A3, 0042/2018/A2). We thank editor Mark Quigley for editorial handling, and Daniel Mori-arty, Hap McSween, and an anonymous reviewer for their constructive comments. CNSA Lunar Exploration and Space Program Center and the Chinese Academy of Sciences Lunar and Deep Space Exploration General Department coordinated data access.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.ErratuFlg:632822386

 

 

 

Accession number:20194107505160

Title:Design and Analysis of Underwater Drag Reduction Property of Biomimetic Surface with Micro-nano Composite Structure

Authors:Ren, Xuezhuang (1); Yang, Lijun (1); Li, Chen (1); Cheng, Guanghua (2, 3); Liu, Nan (1)

Author affiliation:(1) School of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi’an; 710021, China; (2) Xi’an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Xi’an; 710021, China; (3) School of Electronics, Northwestern Polytechnical University, Xi’an; Shaanxi; 710072, China

Corresponding author:Li, Chen(782969713@qq.com)

Source title:Mechanisms and Machine Science

Abbreviated source title:Mech. Mach. Sci.

Volume:77

Issue date:2020

Publication year:2020

Pages:546-559

Language:English

ISSN:22110984

E-ISSN:22110992

Document type:Book chapter (CH)

Publisher:Springer Science and Business Media B.V.

Abstract:Underwater drag reduction has an important impact on the speed and energy consumption of underwater vehicles. This is directly related to whether it can improve the operating efficiency of the underwater vehicle and whether it plays a role in energy-conservation and emission-reduction. A new type of bionic surface with micro-nano composite structure, which is designed to achieve drag reduction of the underwater vehicle is presented. And it is applied to a fish dart. The design source of the structure comes from dolphins’ ridge skin and mosquitoes’ mouthparts. The design of the structure is based on the method of bionics. A fluid mechanics method is taken to simulate the drag reduction effect of the micro-nano composite structure. According to the results of simulation optimization, the drag reduction mechanism of the composite structure is analyzed. From the analysis, the optimal structural parameters can be obtained. The simulation results show that the underwater drag reduction rate can reach 89.49% in the optimal structural parameters.

© Springer Nature Singapore Pte Ltd. 2020.

Number of references:20

Main heading:Structural optimization

Controlled terms:Biomimetics - Bionics - Drag reduction - Emission control - Energy utilization - Fluid mechanics - Nanocomposites - Structure (composition) - Vehicles

Uncontrolled terms:Drag reduction mechanism - Energy conservation and emission reductions - Fluid mechanics methods - Micro-nano - Operating efficiency - Reduction properties - Simulation optimization - Structural parameter

Classification code:451.2 Air Pollution Control - 461 Bioengineering and Biology - 525.3 Energy Utilization - 761 Nanotechnology - 921.5 Optimization Techniques - 931.1 Mechanics - 933 Solid State Physics - 951 Materials Science

Numerical data indexing:Percentage 8.95e+01%

DOI:10.1007/978-981-32-9941-2_45

Funding details: Number: 2016BJ-78, Acronym: SUST, Sponsor: Shaanxi University of Science and Technology;Number: 18JK0101, Acronym: -, Sponsor: Education Department of Shaanxi Province;Number: SKLST201708, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 61705124, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This project is supported by (1) Special Research Project of Shaanxi Provincial Department of Education (18JK0101) (2) Open Foundation of Chinese key laboratory of transient optics and photonic technology (SKLST201708) (3) National Natural Science Foundation of China (61705124) (4) Doctoral Scientific Research Foundation of Shaanxi University of Science and Technology (2016BJ-78).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5968113

Title:Atmospheric correction of geostationary satellite ocean color data under high solar zenith angles in open oceans

Authors:Li, Hao (1, 2, 3); He, Xianqiang (1, 2, 3); Bai, Yan (1, 2, 3); Shanmugam, Palanisamy (4); Park, Young-Je (5); Liu, Jia (6); Zhu, Qiankun (1, 2); Gong, Fang (1, 2); Wang, Difeng (1, 2); Huang, Haiqing (1, 2)

Author affiliation:(1) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) Ocean College, Zhejiang University, Zhoushan, China; (4) Department of Ocean Engineering, IIT Madras, Chennai, India; (5) Korea Ocean Satellite Center, Korea Institute of Ocean Science&Technology, Busan, Korea, Republic of; (6) Key Laboratory of Spectral Imaging Technology of CAS, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China

Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)

Source title:Remote Sensing of Environment

Abbreviated source title:Remote Sens. Environ.

Volume:249

Issue date:November 2020

Publication year:2020

Article number:112022

Language:English

ISSN:00344257

CODEN:RSEEA7

Document type:Journal article (JA)

Publisher:Elsevier Inc.

Abstract:With a revisit time of 1 h, spatial resolution of 500 m, and high radiometric sensitivity, the Geostationary Ocean Color Imager (GOCI) is widely used to monitor diurnal dynamics of oceanic phenomena. However, atmospheric correction (AC) of GOCI data with high solar zenith angle (>70°) is still a challenge for traditional algorithms. Here, we propose a novel neural network (NN) AC algorithm for GOCI data under high solar zenith angles. Unlike traditional NN AC algorithms trained by radiative transfer-simulated dataset, our new AC algorithm was trained by a large number of matchups between GOCI-observed Rayleigh-corrected radiance in the morning and evening and GOCI-retrieved high-quality noontime remote-sensing reflectance (Rrs). When validated using hourly GOCI data, the new NN AC algorithm yielded diurnally stable Rrs in open ocean waters from the morning to evening. Furthermore, when validated by in-situ data from three Aerosol Robotic Network-Ocean Color (AERONET-OC) stations (Socheongcho, Gageocho and Ieodo), the GOCI-retrieved Rrs at visible bands obtained using the new AC algorithm agreed well with the in-situ values, even under high solar zenith angles. Practical application of the new algorithm was further examined using diurnal GOCI observation data acquired in clear open ocean waters. Results showed that the new algorithm successfully retrieved Rrs for the morning and evening GOCI data. Moreover, the amount of Rrs data retrieved by the new algorithm was much higher than that retrieved by the standard AC algorithm in SeaDAS. Our proposed NN AC algorithm can not only be applied to process GOCI data acquired in the morning and evening, but also has the potential to be applied to process polar-orbiting satellite ocean color data at high-latitude ocean that also include satellite observation with high solar zenith angles.

© 2020 Elsevier Inc.

Number of references:42

Controlled terms:AERONET - algorithm - atmospheric correction - GOCI - ocean color - open ocean - solar radiation - spatial resolution - spectral reflectance - zenith angle

Classification code:71.8.5.4 Remote sensing: numerical and image analysis - 76.14.3 Remote sensing

DOI:10.1016/j.rse.2020.112022

Funding details: Number: 2017YFA0603003, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 41621064, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41676170, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41676172, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41706207, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41825014, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:We thank the KIOST/KOSC for providing the GOCI data. We also thank Prof. Knut Stamnes and Dr. Yongzheng Fan from the Stevens Institute of Technology, USA for their comments on this work. We thank Prof. Young-Je Park, Prof. Jae-Seol Shim, Prof. Joo-Hyung Ryu, Prof. Hak-Yeol You and their staff for collecting the in situ Rrs data at three AERONET-OC sites (Ieodo, Socheongchoused and Gageocho), and the Aeronet-OC data used in this study was acquired from the project titled "Construction of Ocean Research Station and their Application Studies" funded by the Ministry of Oceans and Fisheries, Korea. This research was funded by the National Key Research and Development Program of China (Grant #2017YFA0603003), the National Natural Science Foundation of China (Grants #41825014, #41676172, #41676170, #41706207 and #41621064), the Global Change and Air-Sea Interaction Project of China (Grants #GASI-02-SCS-YGST2-01, #GASI-02-PAC-YGST2-01 and #GASI-02-IND-YGST2-01), the Project of State Key Laboratory of Satellite Ocean Environment Dynamics (Grant #QNHX1932), and the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (GML2019ZD0602). We thank anonymous reviewers for their constructive comments.

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5841013

Title:Importance of the parallel polarization radiance for estimating inorganic particle concentrations in turbid waters based on radiative transfer simulations

Authors:Liu, Jia (1); Hu, Bingliang (1); He, Xianqiang (2, 3); Bai, Yan (2, 3); Tian, Liqiao (4); Chen, Tieqiao (1); Wang, Yihao (1); Pan, Delu (2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of CAS, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) School of oceanography, Shanghai Jiao Tong University, Shanghai, China; (4) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China

Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)

Source title:International Journal of Remote Sensing

Abbreviated source title:Int. J. Remote Sens.

Volume:41

Issue:13

Issue date:July 2, 2020

Publication year:2020

Pages:4923-4946

Language:English

ISSN:01431161

E-ISSN:13665901

CODEN:IJSEDK

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd.

Abstract:Contemporary ocean colour radiometers and inversion algorithms to derive optical properties and oceanic constituents rely only on the scalar treatment of water-leaving radiance (Lw). However, Lw polarization components, which contain embedded hydrosol information, have been largely neglected. Here, we examine Lw polarization characteristics, based on vector radiative transfer (RT) simulation, for determining suspended particulate matter in highly turbid waters. The RT simulations show that parallel polarization radiance (PPR) can improve the retrieval of Lw, with a higher relative fraction of ocean colour signal to total radiance (Ioc/It) than the total intensity (I). Moreover, the reflectance for PPR (ρp), compared with that for I, is more sensitive to inorganic particle concentration (IPC) variations, particularly those in the red and NIR bands. Additionally, ρp displays significant directional and spectral variations with respect to geometrical conditions, and the maximum ρp (~10%) is highly peaked at 555 nm in the solar plane. Furthermore, the superiority of PPR to retrieve IPCs, based on the back propagation neural network, was discussed with a very high determination coefficient. Significant improvements in inversion accuracy were observed for PPR with a lower relative deviation (0.901%) than I (3.740%). This study highlights that PPR might be used as an alternative approach to retrieve Lw and thus to derive biogeochemical parameters, particularly in turbid coastal waters.

© 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.

Number of references:67

Controlled terms:back propagation - coastal water - computer simulation - concentration (composition) - ocean color - optical property - polarization - radiance - radiative transfer - suspended particulate matter

Classification code:76.1.11 Properties and processes

DOI:10.1080/01431161.2020.1727059

Funding details: Number: 2017YFA0603003, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 41621064, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;Number: 41676170, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;Number: 41676172, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;Number: 41706207, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;Number: 41825014, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;

Funding text:This work was supported by the National Key Research and Development Program of China under Grant 2017YFA0603003, the National Natural Science Foundation of China under Grants 41706207, 41676170, 41676172, 41825014 and 41621064, the National Science Basic Research Foundation of Shaanxi Province (Grant #2019JQ-929), the Key Research and Development Plan of Zhejiang Province (Grant #2017C03037), the Public Science and Technology Research Funds Projects for Ocean Research (Grant #201505003), the public fund of State Key Laboratory of Satellite Ocean Environment Dynamics, the Second Institute of Oceanography, Ministry of Natural Resources under Grants QNHX1932 and SOEDZZ1801, and the Open Research Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University under Grant 17R02.

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204309399694

Title:Closed-loop laser illumination algorithm using return photon counts

Authors:Li, Lanlan (1); Zhou, Lei (2); Ren, Ge (3)

Author affiliation:(1) School of Optoelectronic Engineering, Xi’an Technological University, Xi’an; 710021, China; (2) Xi’an Research Institute of Navigation Technology, Xi’an; 710068, China; (3) Institute Optics and Electronics, Chinese Academy of Sciences, Chengdu; 610209, China

Corresponding author:Zhou, Lei(zlandl3@163.com)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:30

Issue date:October 20, 2020

Publication year:2020

Pages:9292-9302

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:Boresight and jitter are two fundamental pointing errors of laser illumination systems. A triangular-scanning algorithm is proposed to estimate the direction of the boresight via a three-step maximum boresight estimation and laser beam deflection procedure. On this basis, the closed-loop laser illumination (CLLI) for non-cooperative targets is realized, and the Cramer–Rao lower bounds (CRLB) performance in the lower limit of the pointing error is analyzed. Additionally, a Monte Carlo simulation system is built, and the performance of the CLLI algorithm is analyzed. The simulation results demonstrate that the triangular-scanning algorithm has good performance and can accurately estimate the direction of the boresight to achieve CLLI. Further study shows that the simulation results agree well with theoretical estimations and approximate the CRLB at the lower limit.

© 2020 Optical Society of America

Number of references:17

Main heading:Monte Carlo methods

Controlled terms:Deflected boreholes - Laser beams

Uncontrolled terms:Closed loops - Laser beam deflection - Laser illumination - Non-cooperative target - Photon count - Pointing errors - Scanning algorithms - Theoretical estimation

Classification code:744.8 Laser Beam Interactions - 922.2 Mathematical Statistics

DOI:10.1364/AO.401524

Funding details: Number: 15GDYJY02, Acronym: -, Sponsor: -;Number: 61704134, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 15JS035, Acronym: -, Sponsor: -;

Funding text:Funding. National Natural Science Foundation of China (61704134); Key Laboratory of Shaanxi Provincial Department of Education (15JS035); Dean Fund of the School of Optoelectronic Engineering, Xi’an Technological University, China (15GDYJY02).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201008270095

Title:Hafnium sulfide nanosheets for large energy passively Q-switched fiber laser application

Authors:Pang, Lihui (1, 4, 5); Li, Lu (2); Liu, Wenjun (3); Wu, Rongqian (1, 4, 5); Lv, Yi (1, 4, 5)

Author affiliation:(1) Shaanxi Provincial Center for Regenerative Medicine and Surgical Engineering, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an; 710061, China; (2) School of Science, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (3) State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing; 100876, China; (4) Institute of Advanced Surgical Technology and Engineering, First Affiliated Hospital, Xi'an Jiaotong University, Xi'an; 710061, China; (5) National-Local Joint Engineering Research Center of Precise Surgery & Regenerative Medicine, Xi'an; 710061, China

Corresponding author:Pang, Lihui(lhpang@mail.xjtu.edu.cn)

Source title:Optical Materials

Abbreviated source title:Opt Mater

Volume:102

Issue date:April 2020

Publication year:2020

Article number:109784

Language:English

ISSN:09253467

CODEN:OMATET

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:We report the generation of 240 nJ, robust pulses at 1.5 μm by inserting the hafnium sulfide (HfS2) into the compact Er-doped fiber (EDF) laser. The multilayer HfS2 nanosheets prepared by liquid exfoliation was experimentally studied as a good performance saturable absorber (SA) with the modulation depth (ΔT) of 11.32%. The slope efficiency of fiber laser is as high as 8.9%. Compared with recent reported works, our experimental results show better comprehensive performance. This work demonstrates that HfS2 with prominent nonlinear saturable absorption property could be used as a promising candidate to advance the development of nonlinear optics.

© 2020 Elsevier B.V.

Number of references:49

Main heading:Hafnium compounds

Controlled terms:Erbium compounds - Fiber lasers - Nanosheets - Nonlinear optics - Q switching - Saturable absorbers - Semiconductor quantum wells - Sulfur compounds

Uncontrolled terms:Comprehensive performance - Hafnium sulfides - Liquid exfoliations - Modulation depth - Passively Q-switched - Q-switched - Saturable absorption - Slope efficiencies

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741.1.1 Nonlinear Optics - 744 Lasers - 761 Nanotechnology - 933 Solid State Physics

Numerical data indexing:Energy 2.40e-07J, Percentage 1.13e+01%, Percentage 8.90e+00%, Size 1.50e-06m

DOI:10.1016/j.optmat.2020.109784

Funding details: Number: 2019JQ446, Acronym: -, Sponsor: -;Number: 11875044, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 19JK0811, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Provincial Department of Education;Number: xjj2018268, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2018ZDXM-SF-080, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;

Funding text:National Natural Science Foundation of China (No. 11875044 ); Shaanxi Provincial Key Research and Development Project, China (No. 2018ZDXM-SF-080 ), Nature Science Foundation of Shaanxi Province, China (No. 2019JQ446 ), Natural Science Foundation of Shaanxi Provincial Department of Education (No. 19JK0811 ) and Fundamental Research Funds for the Central Universities, China (No. xjj2018268 ).National Natural Science Foundation of China (No.11875044); Shaanxi Provincial Key Research and Development Project, China (No. 2018ZDXM-SF-080), Nature Science Foundation of Shaanxi Province, China (No. 2019JQ446), Natural Science Foundation of Shaanxi Provincial Department of Education (No. 19JK0811) and Fundamental Research Funds for the Central Universities, China (No. xjj2018268).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201408379686

Title:Computational phase microscopy with modulated illumination

Authors:Gao, Peng (1, 2); Wen, Kai (1); Liu, Lixin (1); Zheng, Juanjuan (1)

Author affiliation:(1) School of Physics and Optoelectronic Engineering (SPOE), Xidian University, No.2 Taibai Road, Xi'an; 710071, China; (2) Joint Laboratory for Advanced Imaging of SPOE, Xidian University, State Key Laboratary of Transient Optics and Photonics, NO.17 Xinxi Road, Xi'an; 710119, China

Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11438

Part number:1 of 1

Issue title:2019 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology

Issue date:2020

Publication year:2020

Article number:1143813

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636545

Document type:Conference article (CA)

Conference name:2019 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology

Conference date:October 26, 2019 - October 28, 2019

Conference location:Beijing, China

Conference code:158575

Sponsor:China Instrument and Control Society (CIS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Conventional optical microscopy provides only intensity images, for which the contrast is induced by fluorescence or the absorption of the sample on the illumination light. Yet, the phase, polarization, and spectrum information of the sample is lost. Meanwhile, limited by design, conventional optical microscopy suffers from the conflict between spatial resolution and field of view (FOV). Modulated illuminations based computational microscopy (CM), which joints front-end optics and post-detection signal processing can, in general, extend the capability of conventional microscopy; for example, it allows the acquisition of the intensity, phase, polarization information, and enhance the spatial resolution within a large FOV. In this paper, modulated illumination based CM was exploited for implementation of phase imaging, resolution enhancement, dual-modality imaging. First, modulated illumination based CM provides quantitative amplitude and phase images, revealing the 3D shape and the inner structure of transparent or translucent samples in the absence of fluorescent labeling. Second, pupil-segmentation based CM measures the aberration of focus modulation microscopy (FMM). Hence, the resolution and SNR of FMM was enhanced after the aberration compensation. Third, phase and fluorescence dualmodality imaging was implemented in confocal laser scanning microscopy (CLSM) by extending the depth of field (DOF) of the CLSM system with a tunable acoustic gradient index of refraction (TAG) lens, providing complementary information (structural/functional) with pixel-to-pixel correspondence for the same sample. Furthermore, the combination of the two imaging modalities enables standalone determination of the refractive index of live cells.

© 2020 SPIE.

Number of references:48

Main heading:Aberrations

Controlled terms:Fluorescence imaging - Image resolution - Optical data storage - Optical instruments - Optical microscopy - Optical signal processing - Pixels - Polarization - Refractive index

Uncontrolled terms:Aberration compensation - Computational microscopies - Confocal laser scanning microscopy - Dual-modality imaging - Fluorescent labeling - Phase retrieval - Quantitative amplitude - Resolution enhancement

Classification code:722.1 Data Storage, Equipment and Techniques - 741.1 Light/Optics - 941.3 Optical Instruments

DOI:10.1117/12.2551362

Funding details: Number: 2017M610623, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 61475187, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Recruitment Program of Global Experts;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This research was partially supported by the National Natural Science Foundation of China (NSFC) (61605150, 61475187); the Recruitment Program of Global Experts (Thousand Talents Recruitment Plan); China Postdoctoral Science Foundation (2017M610623), the Fundamental Research Funds for the Central Universities under Grants No. JB160511, XJS16005 and JBG160502; and the Intelligence Invitation Program for Discipline Innovation in Institutions of Higher Learning (B17035). Part of the work was conducted at Institute of Applied Optics (ITO), University of Stuttgart. We thank sincerely the guidance and supervision from Prof. Wolfgang Osten and Dr. Giancarlo Pedrini from ITO, University Stuttgart.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202008666430

Title:Restoration Method of Hadamard Coding Spectral Imager

Authors:Tang, Xingjia (1, 2, 3); Xu, Zongben (1); Li, Libo (2, 3); Wang, Shuang (2, 3); Hu, Bingliang (2, 3); Wang, Feng (2, 3)

Author affiliation:(1) School of Mathematics and Statistics, Xi’an JiaoTong University, Xi’an, China; (2) Institute of Optics and Precision Mechanics of CAS, China; (3) Key Laboratory of Spectral Imaging Technology, CAS, Xi’an, China

Corresponding author:Xu, Zongben(zbxu@mail.xjtu.edu.cn)

Source title:Applied Spectroscopy

Abbreviated source title:Appl Spectrosc

Volume:74

Issue:5

Issue date:May 1, 2020

Publication year:2020

Pages:583-596

Language:English

ISSN:00037028

E-ISSN:19433530

CODEN:APSPA4

Document type:Journal article (JA)

Publisher:SAGE Publications Inc., United States

Abstract:Hadamard coding spectral imaging technology is a computational spectral imaging technology, which modulates the target’s spectral information and recovers the original spectrum by inverse transformation. Because it has the advantage of multichannel detection, it is being studied by more researchers. For the engineering realization of push-broom coding spectral imaging instrument, it will inevitably be subjected to push-broom error, template error and detection noise, the redundant sampling problem caused by detector. Therefore, three restoration methods are presented in this paper: firstly, the one is the least squares solution, the two is the zero-filling inverse solution by extending the coding matrix in the redundant coding state to a complete higher order Hadamard matrix, the three is sparse method. Secondly, the numerical and principle analysis shows that the inverse solution of zero-compensation has better robustness and is more suitable for engineering application; its conditional number, error expectation and covariance are better and more stable because it directly uses Hadamard matrix, which has good generalized orthogonality. Then, a real-time spectral reconstruction method is presented, which is based on inverse solution of zero-compensation. Finally, simulation analysis shows that spectral data could be destructed relative accuracy in the error condition; however, the effect of template noise and push error on reconstruction is much greater than that of detection error. Therefore, in addition to reducing the detection noise as much as possible, lower template noise and more accurate push controlling should be guaranteed specifically in engineering realization.

© The Author(s) 2020.

Number of references:18

Main heading:Inverse problems

Controlled terms:Covariance matrix - Error compensation - Error detection - Hadamard matrices - Image reconstruction - Imaging techniques - Least squares approximations - Restoration - Spectroscopy

Uncontrolled terms:Engineering applications - Engineering realizations - Generalized orthogonality - Inverse transformations - Least squares solutions - Multichannel detection - Spectral imaging technology - Spectral reconstruction

Classification code:746 Imaging Techniques - 921 Mathematics

DOI:10.1177/0003702819900381

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200608123648

Title:Sparse spectral signal reconstruction for one proposed nine-band multispectral imaging system

Authors:Sun, Bangyong (1, 3); Zhao, Zhe (1); Xie, Dehong (2); Yuan, Nianzeng (1); Yu, Zhe (1); Chen, Fuwei (1); Cao, Congjun (1); de Dravo, Vincent Whannou (1)

Author affiliation:(1) School of Printing, Packaging and Digital Media, Xi'an University of Technology, Xi'an, China; (2) College of Information Science and Technology, Nanjing Forestry University, Nanjing, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Sun, Bangyong(sunbangyong@xaut.edu.cn)

Source title:Mechanical Systems and Signal Processing

Abbreviated source title:Mech Syst Signal Process

Volume:141

Issue date:July 2020

Publication year:2020

Article number:106627

Language:English

ISSN:08883270

E-ISSN:10961216

CODEN:MSSPEP

Document type:Journal article (JA)

Publisher:Academic Press

Abstract:Multispectral filter array (MSFA) imaging with one single sensor is a portable and inexpensive means of acquiring spectral image which is widely used for object detection, material analysis and mechanical system diagnosis. The most challenging task for MSFA imaging is the multispectral demosaicking with the aim of reconstructing the captured raw/mosaic image, especially for the systems with many bands which result in higher sparseness of the raw data. In this paper, we present a 9-band MSFA imaging system in a repetitive 4 × 4 filter array on a single sensor, and propose a demosaicking algorithm for reconstructing the raw spectral image. Within the 4 × 4 MSFA pattern, the fifth spectral band takes up half of the total spatial position while the remaining eight bands occupy 1/16 respectively. To reconstruct the sparse raw data, we first recover the fifth band by propagating the neighboring sampled pixels to the unsampled position using the image gradients, and then employ the reconstructed fifth band as a guided image to demosaick the other bands with the guided filter and residual interpolation. Finally, we estimate the spectral reflectance values from the multispectral image and the characterization matrix. In the experiment, we evaluate the performance of the 9-band imaging system with the binary tree-based edge-sensing (BTES) algorithm, compressed sensing (CS) algorithm, and our proposed demosaicking algorithm. The experiment results demonstrate that our demosaicking algorithm not only outperforms BTES and CS algorithms in terms of objective image quality, e.g., PSNR values and spectral errors, but also reduces the demosaicking artifacts in terms of subjective evaluations.

© 2020 Elsevier Ltd

Number of references:31

Main heading:Image reconstruction

Controlled terms:Binary trees - Compressed sensing - Image quality - Imaging systems - Object detection - Quality control - Reflection - Spectroscopy - Trees (mathematics)

Uncontrolled terms:Demosaicking - Filter arrays - Guide filter - Multi-spectral filter arrays - Multi-spectral imaging systems - Objective image quality - Spectral reflectance value - Subjective evaluations

Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 746 Imaging Techniques - 913.3 Quality Assurance and Control - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1016/j.ymssp.2020.106627

Funding details: Number: 2019M653784, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2017JM1028, Acronym: -, Sponsor: -;Number: 201805037YD15CG21-8, Acronym: -, Sponsor: -;

Funding text:The authors would like to acknowledge the China Postdoctoral Science Foundation (No. 2019M653784 ), Xi’an Science and Technology Research Plan (No. 201805037YD15CG21-8 ), Natural Science Basic Research Plan in Shaanxi Province of China (No. 2017JM1028 ), and Nanjing Forestry University Youth Science and Technology Innovation Fund (No. CX2018024 ) for their support.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20211210116490

Title:Hemoglobin Detection Based on Excessively Tilted Fiber Grating by Non-covalent bonding

Authors:Sun, Yuezhen (1); Lu, Tean (1); Wang, Hushan (2); Sun, Qizhen (1); Yan, Zhijun (1); Liu, Deming (1)

Author affiliation:(1) Huazhong University of Science and Technology, The School of Optical and Electronic Information, Ngia, Wuhan, China; (2) Xi'an Institude of Optics and Precision Mechanics Chinese Academy of Sciences, Xi'an, China

Source title:2020 Asia Communications and Photonics Conference, ACP 2020 and International Conference on Information Photonics and Optical Communications, IPOC 2020 - Proceedings

Abbreviated source title:Asia Commun. Photonics Conf., ACP Int. Conf. Inf. Photonics Opt. Commun., IPOC - Proc.

Part number:1 of 1

Issue title:2020 Asia Communications and Photonics Conference, ACP 2020 and International Conference on Information Photonics and Optical Communications, IPOC 2020 - Proceedings

Issue date:October 2020

Publication year:2020

Article number:9365594

Language:English

ISBN-13:9781943580828

Document type:Conference article (CA)

Conference name:2020 Asia Communications and Photonics Conference, ACP 2020 and International Conference on Information Photonics and Optical Communications, IPOC 2020

Conference date:October 24, 2020 - October 27, 2020

Conference location:Beijing, China

Conference code:167705

Sponsor:CIC; COS; IEEE Photonics Society; OSA; SPIE

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We have demonstrated a novel hemoglobin sensor based on hydroxide bond functionalized excessively tilted fiber grating. Due to non-covalent bonding between hydroxide bond and hemoglobin, such sensor could achieve hemoglobin detection with sensitivity around 1.93nm/(mg/ml).

© 2020 The Author(s)

Number of references:7

Main heading:Photonics

Controlled terms:Fiber bonding - Hemoglobin - Optical communication

Uncontrolled terms:Functionalized - Hydroxide bond - Non-covalent bondings - Tilted fiber gratings

Classification code:461.1 Biomedical Engineering - 717.1 Optical Communication Systems - 741.1 Light/Optics - 804 Chemical Products Generally

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204709517083

Title:Method for Detecting Atmospheric Pressure Profile Using Rotational and Vibrational Raman Lidar

Title of translation:转动/振动拉曼激光雷达探测大气压力廓线的方法研究

Authors:Di, Huige (1); Wang, Jianyu (2); Zhao, Xuan (1); Han, Geng (1); Wen, Xiaonan (1); Zhang, Xingqi (1); Wang, Yufeng (1); Y., Song; D., Hua

Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (2) Key Laboratory of Active Opto-Electronics Technology, Chinese Academy of Sciences, Shanghai; 200083, China

Corresponding author:Hua, Dengxin(dengxinhua@xaut.edu.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:40

Issue:15

Issue date:August 10, 2020

Publication year:2020

Article number:1501001

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:Rotational and vibrational Raman signals are used to obtain profiles of atmospheric temperature and humidity, and the atmospheric pressure profile can be retrieved from these. A lidar system for detecting the atmospheric pressure and a method for inverting the data are presented in this paper. The feasibility of the given method and the factors that cause the pressure inversion error are analyzed. There are three main error sources: temperature deviation, reference point pressure deviation, and atmospheric specific humidity. Atmospheric detection and pressure inversion are carried out using a Raman lidar system at Xi'an University of Technology. The retrieved atmospheric pressure profile is compared with the pressure sounding data from the same day and a better inversion result is obtained, thus demonstrating the feasibility of the proposed research method. Finally, the performance requirements for achieving highly precise measurements of atmospheric pressure using a lidar system are analyzed from the perspective of specific applications.

© 2020, Chinese Lasers Press. All right reserved.

Number of references:17

Main heading:Atmospheric humidity

Controlled terms:Atmospheric pressure - Optical radar - Pressure - Raman spectroscopy

Uncontrolled terms:Main error sources - Performance requirements - Precise measurements - Raman lidar system - research methods - Specific humidity - Temperature and humidities - Temperature deviation

Classification code:443.1 Atmospheric Properties - 716.2 Radar Systems and Equipment - 931.1 Mechanics

DOI:10.3788/AOS202040.1501001

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20211010056176

Title:Data Association Based Fast Fault Detection for Low-Cost Micro/Nano-Satellite

Authors:Chen, Rongli (1); Wang, Xiaodong (2); Guo, Yangming (2); Qin, Weihua (3); Zhang, Ximing (1)

Author affiliation:(1) Space Optical Research Lab xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Northwestern Polytechnic University, College of Computer Science, Xi'an, China; (3) 20th Research Institute China Electronics Technology Group Corporation, Xi'an, China

Source title:Proceedings of 2020 International Conference on Sensing, Diagnostics, Prognostics, and Control, SDPC 2020

Abbreviated source title:Proc. Int. Conf. Sens., Diagn., Progn., Control, SDPC

Part number:1 of 1

Issue title:Proceedings of 2020 International Conference on Sensing, Diagnostics, Prognostics, and Control, SDPC 2020

Issue date:August 5, 2020

Publication year:2020

Pages:1-4

Article number:9353167

Language:English

ISBN-13:9781728170503

Document type:Conference article (CA)

Conference name:4th International Conference on Sensing, Diagnostics, Prognostics, and Control, SDPC 2020

Conference date:August 5, 2020 - August 7, 2020

Conference location:Virtual, Beijing, China

Conference code:167277

Sponsor:Beijing Institute of Technology; Beijing Jiaotong University; et al.; IEEE Beijing Section; Laboratory of Traction Power (TPL), Southwest Jiaotong University; Southwest Jiaotong University

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Under most circumstances, it is very important to achieve fast and real-Time low-cost micro/nano-satellite fault detection. Regarding of faults as dynamic modes which observe through the multi-sensors, with probabilistic data association based on multi-sensor, we obtain the fault detection results according to the association probability and the threshold values. Joint Probabilistic Data Association (JPDA) algorithm is one of the effective ways for multi-sensor and multi-Target tracking. We improve the JPDA algorithm as follows: At first, we propose an approximation method for constructing the confirmation matrix by removing the small probability events using the right threshold, and then, we present the mathematical division of the confirmation matrix according to the intersection area of the association gate of fault targets to be tracked; Finally, we compute the association probability of fault targets through attenuating the value of the public measurement. The simulation results show preliminarily that our improved JPDA algorithm saves the computational time greatly, and meet the requirements of fast and real-Time fault detection effectively.

© 2020 IEEE.

Number of references:8

Main heading:Fault detection

Controlled terms:Approximation algorithms - Costs - Matrix algebra - Probabilistic logics - Probability - Target tracking

Uncontrolled terms:Approximation methods - Association probability - Confirmation matrix - Joint probabilistic data association algorithms - Multi-target tracking - Probabilistic data association - Real time fault detection - Small probability events

Classification code:721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 911 Cost and Value Engineering; Industrial Economics - 921 Mathematics - 921.1 Algebra - 922.1 Probability Theory

DOI:10.1109/SDPC49476.2020.9353167

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210809970629

Title:Research on photoelectric signal preprocessing of four-quadrant detector in free space optical communication system

Authors:Wang, Xuan (1, 2, 3); Su, Xiuqin (1); Liu, Guizhong (2); Han, Junfeng (1); Wang, Rui (1, 3)

Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, China; (2) Department of Electronics and Information, Xi'an Jiaotong University, China; (3) University of Chinese Academy of Sciences, China

Source title:2020 IEEE 5th International Conference on Signal and Image Processing, ICSIP 2020

Abbreviated source title:IEEE Int. Conf. Signal Image Process., ICSIP

Part number:1 of 1

Issue title:2020 IEEE 5th International Conference on Signal and Image Processing, ICSIP 2020

Issue date:October 23, 2020

Publication year:2020

Pages:628-632

Article number:9339342

Language:English

ISBN-13:9781728168968

Document type:Conference article (CA)

Conference name:5th IEEE International Conference on Signal and Image Processing, ICSIP 2020

Conference date:October 23, 2020 - October 25, 2020

Conference location:Virtual, Nanjing, China

Conference code:166987

Sponsor:IEEE; Southeast University

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In the free space optical communication system, the detection accuracy and detection speed of the beam deflection angle have an important influence on the tracking accuracy and tracking speed of the precision tracking system. The beam deflection angle is equivalent to the position detection of the laser spot on the photo-sensitive surface of the precision tracking detector. Using a four-quadrant detector to detect the spot position error in real time can effectively eliminate the spot jitter error through the correction mechanism. By analyzing the signal characteristics of the four-quadrant detector, a photoelectric signal preprocessing circuit for the four-quadrant detector output is designed and implemented. Including the transimpedance amplifier module, low-pass filter module, main amplification module. Finally, the spot position is calculated by the photocurrent in the four quadrants. Through theoretical calculation, physical modeling, simulation, the designed signal preprocessing circuit is verified by simulation. The simulation results show that the magnification of designed signal preprocessing circuit is 2×108 and the bandwidth is 1.97MHz, which can provide a strong guarantee for the calculation of the spot position of the four-quadrant detector.

© 2020 IEEE.

Number of references:13

Main heading:Signal detection

Controlled terms:Image processing - Low pass filters - Operational amplifiers - Optical communication - Optical data processing - Photocurrents - Photoelectricity

Uncontrolled terms:Correction mechanism - Four quadrant detectors - Free space optical communication systems - Photoelectric signals - Precision tracking detectors - Precision tracking system - Signal characteristic - Theoretical calculations

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 703.2 Electric Filters - 713.1 Amplifiers - 716.1 Information Theory and Signal Processing - 717.1 Optical Communication Systems - 723.2 Data Processing and Image Processing

Numerical data indexing:Frequency 1.97e+06Hz

DOI:10.1109/ICSIP49896.2020.9339342

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20211210118929

Title:A robust predefined-time stable tracking control for uncertain robot manipulators????(Open Access)

Authors:Zhang, Nansheng (1); Wang, Shanshan (1); Hou, Yinlong (2); Zhang, Liyin (2)

Author affiliation:(1) Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) Xi’an Key Laboratory of Advanced Control and Intelligent Process, School of Automation, Xi’an University of Posts and Telecommunications, Xi’an; 710121, China

Corresponding author:Wang, Shanshan(wang33_0921@126.com)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:188600-188610

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In this paper, a novel robust predefined-time approach is proposed for global predefined-time tracking control of uncertain robot manipulators. With the sufficient consideration of the effects of uncertainties and external disturbances (UED) on the trajectory tracking performance of robot manipulators, a singularity-free robust control with an auxiliary nonlinear vector is constructed for the predefined-time tracking. The global predefined-time stable tracking by using Lyapunov stability theory has been accomplished for ensuring that both the position and velocity tracking errors arrive at the origin within a predefined time. The proposed approach has the following advantages: (i) the proposed approach with a simple structure is easy to implement with the global robust predefined-time tracking control; (ii) the convergence time of the proposed approach independently of the initial states can be given as an exact controller parameter in advance; (iii) the proposed approach is easy to apply into uncertain robot manipulators with time-constraints tracking control. Extensive simulation and experimental results have been accomplished to show the effectiveness and improved performances of the proposed approach.

© 2020 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.

Number of references:47

Main heading:Industrial manipulators

Controlled terms:Flexible manipulators - Modular robots - Navigation - Robot applications - Robust control - Uncertainty analysis

Uncontrolled terms:Controller parameter - Extensive simulations - External disturbances - Lyapunov stability theory - Tracking controls - Trajectory tracking - Uncertain robot manipulators - Velocity tracking

Classification code:731 Automatic Control Principles and Applications - 922.1 Probability Theory

DOI:10.1109/ACCESS.2020.3031328

Funding details: Number: 20JK0916, Acronym: -, Sponsor: Education Department of Shaanxi Province;

Funding text:This work was supported by the Scientific Research Program Funded by the Shaanxi Provincial Education Department under Program 20JK0916.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20205209687182

Title:Deep Learning for Three Types of Keratitis Classification based on Confocal Microscopy Images

Authors:Zhang, Xinming (1, 2); Ding, Gang (3); Gao, Chi (1, 2); Li, Chao (1, 2); Hu, Bingliang (1); Zhang, Chenming (3); Wang, Quan (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Key Laboratory of Biomedical Spectroscopy of Xi'an, Xi'an Institute of Optics and Precision, Mechanics of the Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Ji'nan Second People's Hospital, Jinan, China

Corresponding author:Zhang, Chenming(chenming-zhang@163.com)

Source title:ACM International Conference Proceeding Series

Abbreviated source title:ACM Int. Conf. Proc. Ser.

Part number:1 of 1

Issue title:Proceedings of the 2020 3rd International Conference on Signal Processing and Machine Learning, SPML 2020

Issue date:October 22, 2020

Publication year:2020

Pages:91-97

Article number:3432310

Language:English

ISBN-13:9781450375733

Document type:Conference article (CA)

Conference name:3rd International Conference on Signal Processing and Machine Learning, SPML 2020

Conference date:October 22, 2020 - October 24, 2020

Conference location:Virtual, Online, China

Conference code:165611

Publisher:Association for Computing Machinery

Abstract:Accurate diagnosis of keratitis is important for the follow up treatment. The confocal microscope can scan different depth and layer of the cornea, therefore is an important tool for clinical diagnosis of keratitis. We collected, augmented and preprocessed the confocal microscopic images. In this paper, three kinds of infectious keratitis samples including viral keratitis, bacterial keratitis, and fungal keratitis were classified with ResNet (Residual Network). The results show that the recognition rate of three kinds of keratitis can reach 91.82%, and the accuracy rate of single keratitis could reach 99.09%. In addition, cross-validation was performed on each patient in the dataset. The classification accuracy rate reached 75.00%). This work extended the previous work of identifying fungal keratitis only to three categories and reach a good classification rate of keratitis.

© 2020 ACM.

Number of references:14

Main heading:Deep learning

Controlled terms:Diagnosis - Image classification - Learning systems

Uncontrolled terms:Accuracy rate - Classification accuracy - Classification rates - Clinical diagnosis - Confocal microscopic image - Cross validation - Follow up - Three categories

Classification code:461.6 Medicine and Pharmacology

Numerical data indexing:Percentage 7.50e+01%, Percentage 9.18e+01%, Percentage 9.91e+01%

DOI:10.1145/3432291.3432310

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204409411023

Title:Moving target extraction and background reconstruction algorithm

Authors:Qiu, Shi (1); Li, Xuemei (2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China; (2) Shanghai Jiao Tong University, Shang hai, China

Corresponding author:Li, Xuemei(a13579xm@sina.com)

Source title:Journal of Ambient Intelligence and Humanized Computing

Abbreviated source title:J. Ambient Intell. Humanized Comput.

Issue date:2020

Publication year:2020

Language:English

ISSN:18685137

E-ISSN:18685145

Document type:Article in Press

Publisher:Springer Science and Business Media Deutschland GmbH

Abstract:It is difficult for the computer to distinguish the target from the background due to the long-time static of the target after moving. A new moving target detection and background reconstruction algorithm is proposed and is applied into the RGB video for the first time. Firstly, the proposed algorithm builds a model from the time dimension to extract the changed region. Then, it combines with the space dimension information to completely extract the moving target. The spatiotemporal correlation model is established to realize the construction of pure background. The experimental results show that the proposed algorithm can effectively reconstruct the background and the recognition rate of moving target is high.

© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

Number of references:41

Main heading:Object recognition

Controlled terms:Computer science

Uncontrolled terms:Background reconstruction - Moving target detection - Moving targets - Space dimensions - Spatiotemporal correlation - Time dimension

DOI:10.1007/s12652-020-02619-2

Funding details: Number: -, Acronym: ZJU, Sponsor: Zhejiang University;Number: A2026, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;Number: 61873145, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work is supported by the Open Project Program of the State Key Lab of CAD&CG (Grant No. A2026), Zhejiang University. National Natural Science Foundation of China (Grant No. 61873145).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202008647645

Title:Rapid diagnosis and measurement of explosively formed projectiles based on high-quality sequential images

Authors:C., Sun; Y., Jia

Author affiliation:(1) Beijing Key Lab. for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) Xi’an Modern Control Technology Institute, Xi’an; Shaanxi; 710065, China

Corresponding author:Sun, C.(brave_sunce@163.com)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:13

Issue date:May 1, 2020

Publication year:2020

Pages:3959-3966

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:The explosively formed projectile (EFP) is an important type of warhead technology. To verify and evaluate its design and performance, EFP testing is an essential procedure. This work applies a newly developed dual-color laser photographic system (DCLPS) to diagnose the EFP in a flight. The main concepts of the DCLPS and image measurement theory are introduced in detail. The states of the EFP in flight are recorded via experiments at the Nanshan Test Center. High-quality sequential images are obtained by the DCLPS, and the measured key parameters agree well with the simulation results. Test time is only a few minutes, and the measurement error is less than 10%. This work demonstrates the considerable capability of the DCLPS for rapid diagnosis and measurement of an ultrafast EFP, and its great potential in similar observation applications.

© 2020 Optical Society of America

Number of references:28

Main heading:Image quality

Controlled terms:Measurement theory - Projectiles

Uncontrolled terms:Dual color - Explosively formed projectiles - High quality - Photographic systems - Sequential images - Test time - Ultra-fast

Numerical data indexing:Percentage 1.00e+01%

DOI:10.1364/AO.383410

Funding text:The authors are grateful to Lauren for polishing the manuscript and to Professor Liu for the experimentalsupport.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009602457

Title:Research on the calibration technique of the low-light-level remote sensing camera

Authors:Bai, Zhe (1); Ma, Yilong (1); Pan, Yue (1); Pang, Zhihai (1); Zhao, Hui (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11567

Part number:1 of 1

Issue title:AOPC 2020: Optical Sensing and Imaging Technology

Issue date:2020

Publication year:2020

Article number:115673O

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639553

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Sensing and Imaging Technology, AOPC 2020

Conference date:August 25, 2020 - August 27, 2020

Conference location:Xiamen, China

Conference code:165074

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:In recent years, Low-Light-Level (LLL) remote -sensing camera has become a novel subject for the development of aerospace optical remote-sensing payloads. LLL remote sensing camera works in ultra-low light conditions, the image signal is very weak and requires image intensified technology to achieve. In order to make better use of LLL remote sensing data, it is necessary to establish the quantitative relationship between the amount of radiation received by the camera and the digital signal output to process the image. That's radiation calibration technology. Therefore, the radiation calibration of the LLL remote sensing camera is particularly important. In this article, first the requirements for calibration of LLL remote sensing cameras are analyzed in theory. After that, a radiation calibration scheme of the LLL remote sensing camera is put forward. Finally, the radiation calibration test is carried out, and the calibration data are analyzed. The results show that the calibration scheme of LLL remote sensing camera is reasonable and feasible.

© 2020 SPIE.

Number of references:6

Main heading:Remote sensing

Controlled terms:Calibration - Cameras - Imaging techniques - Light

Uncontrolled terms:Calibration data - Calibration schemes - Calibration techniques - Low light conditions - Optical remote sensing - Radiation calibration - Remote sensing cameras - Remote sensing data

Classification code:741.1 Light/Optics - 742.2 Photographic Equipment - 746 Imaging Techniques

DOI:10.1117/12.2580218

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5837578

Title:Dimension-reconfigurable bubble film nanochannel for wetting based sensing

Authors:Ma, Yu (1, 2); Sun, Miao (1, 2); Duan, Xuexin (3); van den Berg, Albert (1, 4); Eijkel, Jan C. T. (1, 4); Xie, Yanbo (1, 2)

Author affiliation:(1) International Joint Laboratory of Nanofluidics and Interfaces, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an; 710100, China; (2) MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, School of Physical Science and Technology, Northwestern Polytechnical University, Xi’an; 710072, China; (3) State Key Laboratory of Precision Measuring Technology and Instruments, College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin; 300072, China; (4) BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, Technical Medical Centre and Max Planck Center for Complex Fluid Dynamics, University of Twente, Enschede; 7522NB, Netherlands

Corresponding author:Xie, Yanbo(ybxie@nwpu.edu.cn)

Source title:Nature Communications

Abbreviated source title:Nat. Commun.

Volume:11

Issue:1

Issue date:December 1, 2020

Publication year:2020

Article number:814

Language:English

E-ISSN:20411723

Document type:Journal article (JA)

Publisher:Nature Research

Abstract:Dimensions and surface properties are the predominant factors for the applications of nanofluidic devices. Here we use a thin liquid film as a nanochannel by inserting a gas bubble in a glass capillary, a technique we name bubble-based film nanofluidics. The height of the film nanochannel can be regulated by the Debye length and wettability, while the length independently changed by applied pressure. The film nanochannel behaves functionally identically to classical solid state nanochannels, as ion concentration polarizations. Furthermore, the film nanochannels can be used for label-free immunosensing, by principle of wettability change at the solid interface. The optimal sensitivity for the biotin-streptavidin reaction is two orders of magnitude higher than for the solid state nanochannel, suitable for a full range of electrolyte concentrations. We believe that the film nanochannel represents a class of nanofluidic devices that is of interest for fundamental studies and also can be widely applied, due to its reconfigurable dimensions, low cost, ease of fabrication and multiphase interfaces.

© 2020, The Author(s).

Number of references:58

Controlled terms:concentration (composition) - electrolyte - equipment - film - nanoparticle - wetting

Classification code:901 Engineering Profession

DOI:10.1038/s41467-020-14580-x

Funding details: Number: U1730133, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;Number: U1732143, Acronym: NSFC-Yunnan Joint Fund, Sponsor: National Natural Science Foundation of China-Yunnan Joint Fund;

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009602455

Title:Pointing design and testing of corner reflector

Authors:Liu, Jie (1); Wang, Hu (1, 2); Lin, Shangmin (3); Xue, Yaoke (1); Liu, Yang (1); Liu, Meiying (1); Shen, Yang (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, China; (2) University of Chinese Academy of Sciences, China; (3) Xi'an Institute of Optics and Precision Mechanics, University of Chinese Academy of Sciences, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11567

Part number:1 of 1

Issue title:AOPC 2020: Optical Sensing and Imaging Technology

Issue date:2020

Publication year:2020

Article number:115673M

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639553

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Sensing and Imaging Technology, AOPC 2020

Conference date:August 25, 2020 - August 27, 2020

Conference location:Xiamen, China

Conference code:165074

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:The corner reflector is usually realized by fixing the corner cube prism through a specific structure, which is much easier to install and debugin practical application. As we all know, one of the most important uses of the corner reflector is that it can be used as a passive target marker for satellites and aircrafts. At a certain distance, as the angle of incidence increases, the return light efficiency of the corner reflector gradually decreases, and the return light efficiency directly affects the shape and brightness of the target point. Usually when multiple targets are tracked, the better the target direction consistency, the more uniform the light spot can be obtained. This paper introduces the method of drawing the normal direction of the corner cube prism to the mounting surface. The normal direction of the corner cube prism is tested by the self-collimating theodolite and the direction error is within 1, and the error of return light efficiency is better than 5%, which provides high-precision pointing for the combination of multiple corner reflectors. On this basis, we expand the pointing design of the sub-corner cube prism for the plane array of the corner reflectors. After testing, the direction error of the sub-corner cube prism is within 5.

© 2020 SPIE.

Number of references:3

Main heading:Reflection

Controlled terms:Efficiency - Errors - Geometry - Imaging techniques - Light - Prisms

Uncontrolled terms:Angle of Incidence - Corner cube prism - Corner reflector - High-precision - Light efficiency - Multiple targets - Normal direction - Target direction

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 913.1 Production Engineering - 921 Mathematics

Numerical data indexing:Percentage 5.00e+00%

DOI:10.1117/12.2580209

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201908616093

Title:End-to-end learning interpolation for object tracking in low frame-rate video????(Open Access)

Authors:Liu, Liqiang (1, 2); Cao, Jianzhong (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17, Xinxi Road, Xi'an, China; (2) University of Chinese Academy of Sciences, No.19, Yuquan Road, Beijing, China

Corresponding author:Liu, Liqiang(liuliqiang@opt.cn)

Source title:IET Image Processing

Abbreviated source title:IET Image Proc.

Volume:14

Issue:6

Issue date:May 11, 2020

Publication year:2020

Pages:1066-1072

Language:English

ISSN:17519659

Document type:Journal article (JA)

Publisher:Institution of Engineering and Technology, United States

Abstract:In many scenarios, where videos are transmitted through bandwidth-limited channels for subsequent semantic analytics, the choice of frame rates has to balance between bandwidth constraints and analytics performance. Faced with this practical challenge, this study focuses on enhancing object tracking at low frame rates and proposes a learning Interpolation for tracking framework. This framework embeds an implicit video frame interpolation sub-network, which is concatenated and jointly trained with another object tracking sub-network. Once a low frame-rate video is an input, it is first mapped into a high frame-rate latent video, based on which the tracker is learned. Novel strategies and loss functions are derived to ensure the effective end-to-end optimisation of the authors' network. On several challenging benchmarks and settings, their method achieves a highly competitive tradeoff between frame rate and tracking accuracy. As is known, the implications of interpolation on semantic video analytics and tracking remain unexplored, and the authors expect their method to find many applications in mobile embedded vision, Internet of Things and edge computing.

© The Institution of Engineering and Technology 2020

Number of references:41

Main heading:Object tracking

Controlled terms:Bandwidth - Interpolation - Semantics

Uncontrolled terms:Bandwidth constraint - Bandwidth-limited channels - Embedded visions - Low frame rate video - Low frame rates - Novel strategies - Semantic-analytics - Tracking accuracy

Classification code:716.1 Information Theory and Signal Processing - 921.6 Numerical Methods

DOI:10.1049/iet-ipr.2019.0944

Funding details: Number: XAB2015B21,Y429611213, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: UCAS, Sponsor: University of Chinese Academy of Sciences;

Funding text:The work was supported by the CAS 'Light of West China' Program (no. XAB2015B21); and partially supported by the Western Light of the Chinese Academy of Science (no. Y429611213). The authors also acknowledge the support from UCAS Joint Training Program.The work was supported by the CAS ‘Light of West China’ Program (no. XAB2015B21); and partially supported by the Western Light of the Chinese Academy of Science (no. Y429611213). The authors also acknowledge the support from UCAS Joint Training Program.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20204209348914

Title:High-speed laser retroreflective shadowgraph system for large-scale transient studies on a field-test range

Authors:Sun, Ce (1); Jia, Yangyu (2); Zhang, Dongjiang (2)

Author affiliation:(1) Beijing Institute of Technology, School of Optics and Photonics, Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, Beijing, China; (2) Xi'an Modern Control Technology Research Institute, Xi'an, China

Corresponding author:Sun, Ce(brave_sunce@163.com)

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:59

Issue:9

Issue date:September 1, 2020

Publication year:2020

Article number:094104

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE

Abstract:High-speed laser shadowgraphy is crucial in range testing. We report the design, development, and application of a dual-sequence large-scale high-speed laser retroreflective shadowgraph system (DLH-LRSS) to monitor large-scale transient phenomena on a field-test range. The DLH-LRSS is based on the retroreflective technique. The narrow pulse width laser can effectively freeze ultrahigh-speed processes, thereby allowing the investigation of ultrafast phenomena. Multiple shooting modes contribute to the flexibility of the test. Three typical experiments were conducted at the Nanshan Test Center, and good quality sequential images were captured by DLH-LRSS. We demonstrate that DLH-LRSS has large-scale, ultra-fast recording and quantitative study capabilities. The DLH-LRSS can be used in the rapid diagnosis and measurement in range testing and similar observation applications.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).

Number of references:23

Main heading:Engineering

Controlled terms:Molecular physics

Uncontrolled terms:High speed laser - Multiple shooting - Narrow pulse widths - Quantitative study - Sequential images - Transient phenomenon - Transient studies - Ultra high speed

Classification code:931.3 Atomic and Molecular Physics

DOI:10.1117/1.OE.59.9.094104

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580499

Title:Research on safety self-perceptual optical payload of space vehicle

Authors:Yingjun, Ma (1); Jianwei, Peng (1); Chao, Mei (1); Weining, Chen (1); Huinan, Guo (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11570

Part number:1 of 1

Issue title:AOPC 2020: Telescopes, Space Optics, and Instrumentation

Issue date:2020

Publication year:2020

Article number:1157008

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639614

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Telescopes, Space Optics, and Instrumentation, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165102

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Aiming at the threats to spacecraft safety caused by space debris, and improving the stability and working life of spacecraft in orbit, it is proposed to use spacecraft equipped with a safety self-perceptual optical payload to detect space debris to improve the safety of the aircraft in orbit. This paper analyses the application methods and characteristics of the safety self-perceptual optical payload of space vehicles, and defines the technical indicators of the optical payload. The safety self-Perceptual optical payload includes the MWIR optical system with large field of view and the visible continuous zoom lens with large zoom ratio. The detector resolution is 1280×1024, the pixel size is 15μm, the focal length is 8mm, the F number is 2, and the field of view is 97.6°×85° of MWIR optical system;The detector resolution is 1920×1080, the pixel size is 5.5μm, the focal length is 15mm~750mm, which has a 50 times zoom ratio, and the field of view is 38.8°×22.4°~0.80°×0.45° of the visible continuous zoom lens. The two systems are athermal designed in the temperature range of-40?~60? respectively to meet the environmental requirements of space applications. Safety self-perceptual optical payload could obtain, and apperceive long-range targets in the 10km range around the space vehicle, and improve the aircraft's survival ability.

© 2020 SPIE. All rights reserved.

Number of references:15

Main heading:Space debris

Controlled terms:Aircraft - Lenses - Optical systems - Orbits - Pixels - Space applications - Spacecraft - Telescopes

Uncontrolled terms:Application method - Detector resolution - Environmental requirement - Large field of views - Large zoom ratios - Long range target - Technical indicator - Temperature range

Classification code:652.1 Aircraft, General - 655.1 Spacecraft, General - 656 Space Flight - 656.1 Space Flight - 741.3 Optical Devices and Systems

Numerical data indexing:Size 1.00e+04m, Size 1.50e-05m, Size 5.50e-06m, Size 8.00e-03m

DOI:10.1117/12.2576286

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5683205

Title:Retrieval of marine inorganic particle concentrations in turbid waters using polarization signals

Authors:Liu, Jia (1); Liu, Jiahang (1, 5); He, Xianqiang (2, 3); Tian, Liqiao (4); Bai, Yan (2, 3); Chen, Tieqiao (1); Wang, Yihao (1); Zhu, Feng (1); Pan, Delu (2, 3)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technique of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi’an, China; (2) State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; (3) Institute of Oceanography, Shanghai Jiao Tong University, Shanghai; Shanghai, China; (4) State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China; (5) College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, China

Corresponding author:He, Xianqiang(hexianqiang@sio.org.cn)

Source title:International Journal of Remote Sensing

Abbreviated source title:Int. J. Remote Sens.

Volume:41

Issue:13

Issue date:July 2, 2020

Publication year:2020

Pages:4901-4922

Language:English

ISSN:01431161

E-ISSN:13665901

CODEN:IJSEDK

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd.

Abstract:The polarization properties of water-leaving radiance (Lw) contains rich information about hydrosols, which has great potential to improve the retrieval accuracy of oceanic constituents. However, current ocean colour inversion algorithms are only based on the water-leaving radiation intensity, and the polarization properties have been ignored. Here, based on the radiative transfer simulations, the possibility of retrieving suspended particulate matter in turbid waters based on the polarization properties was investigated. The results showed that the degree of polarization (DOP) of the upward radiation just beneath the water surface has significant angular and spectral variations with respect to the observational geometries, inorganic particle concentrations, solar zenith angles and aerosol optical thicknesses (AOTs). The directional variations in DOP along with viewing zenith angles are typically characterized by a double peak feature with a maximum of 0.5 in the principal plane. In addition, the DOP in the visible bands is highly sensitive to inorganic particle concentrations. The DOP gradually decreases from 412 nm to 555 nm and increases with wavelengths beyond 555 nm, particularly for wavelengths larger than 620 nm. An empirical relationship between the DOP at 670 nm and the inorganic particle concentration was established for different viewing geometries with determination coefficient (R2) up to 0.9996. Overall, our simulation results indicate that the polarization property of underwater upward radiance has great potential for suspended particulate matter retrieval in coastal waters.

© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.

Number of references:64

Controlled terms:aerosol - aerosol composition - algorithm - computer simulation - concentration (composition) - inorganic compound - polarization - suspended particulate matter

Classification code:71.7.15 Aerosols - 76.2.9 Particulates

DOI:10.1080/01431161.2019.1641248

Funding details: Number: 41621064, Acronym: NNSF, Sponsor: National Natural Science Foundation of China;Number: 41621064, Acronym: NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41621064, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41676170, Acronym: NNSF, Sponsor: National Natural Science Foundation of China;Number: 41676170, Acronym: NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41676170, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41676172, Acronym: NNSF, Sponsor: National Natural Science Foundation of China;Number: 41676172, Acronym: NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41676172, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41706207, Acronym: NNSF, Sponsor: National Natural Science Foundation of China;Number: 41706207, Acronym: NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41706207, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 41825014, Acronym: NNSF, Sponsor: National Natural Science Foundation of China;Number: 41825014, Acronym: NNSFC, Sponsor: National Natural Science Foundation of China;Number: 41825014, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: Grant 2016YFF0103604, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: Grant 2017YFA0603003, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);

Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFA0603003, by the National Basic Research Program (‘‘973ʹ’ Program) of China (Grant 2015CB954002), the National Key Research and Development Program of China under Grant 2016YFF0103604, by the National Natural Science Foundation of China under Grants 41706207, 41676170, 41676172, 41825014 and 41621064, the Public Science and Technology Research Funds Projects for Ocean Research (Grant 201505003), by the public fund of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources under Grants QNHX1932 and SOEDZZ1801, by the Western Young Scientist Program of CSA under Grant XAB2015A07, by the Open Research Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University under Grant 17R02.

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20212910659040

Title:Precise temporal localization for complete actions with quantified temporal structure

Authors:Lu, Chongkai (1); Li, Ruimin (2); Fu, Hong (3); Fu, Bin (2); Wang, Yihao (1); Lo, Wai-Lun (4); Chi, Zheru (1)

Author affiliation:(1) The Hong Kong Polytechnic University, Hong Kong; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (3) The Education University of Hong Kong, Hong Kong; (4) Chu Hai College of Higher Education, Hong Kong

Corresponding author:Fu, Hong(hfu@eduhk.hk)

Source title:Proceedings - International Conference on Pattern Recognition

Abbreviated source title:Proc. Int. Conf. Pattern Recognit.

Part number:1 of 1

Issue title:Proceedings of ICPR 2020 - 25th International Conference on Pattern Recognition

Issue date:2020

Publication year:2020

Pages:4781-4788

Article number:9412081

Language:English

ISSN:10514651

CODEN:PICREG

ISBN-13:9781728188089

Document type:Conference article (CA)

Conference name:25th International Conference on Pattern Recognition, ICPR 2020

Conference date:January 10, 2021 - January 15, 2021

Conference location:Virtual, Milan, Italy

Conference code:169954

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract: Existing temporal action detection algorithms cannot distinguish complete and incomplete actions while this property is essential in many applications. To tackle this challenge, we proposed the action progression networks (APN), a novel model that predicts action progression of video frames with continuous numbers. Using the progression sequence of test video, on the top of the APN, a complete action searching algorithm (CAS) was designed to detect complete actions only. With the usage of frame-level fine-grained temporal structure modeling and detecting actions according to their whole temporal context, our framework can locate actions precisely and is good at avoiding incomplete action detection. We evaluated our framework on a new dataset (DFMAD-70) collected by ourselves which contains both complete and incomplete actions. Our framework got good temporal localization results with 95.77% average precision when the IoU threshold is 0.5. On the benchmark THUMOS14, an incomplete-ignostic dataset, our framework still obtain competitive performance.

© 2020 IEEE

Number of references:29

Main heading:Pattern recognition

Controlled terms:Benchmarking

Uncontrolled terms:Competitive performance - Detection algorithm - Fine grained - Searching algorithms - Temporal localization - Temporal structures - Video frame

Numerical data indexing:Percentage 9.58e+01%

DOI:10.1109/ICPR48806.2021.9412081

Funding details: Number: RG 28/2020-2021R, Acronym: EdUHK, Sponsor: Education University of Hong Kong;Number: UGC/FDS13/E04/18, Acronym: OPCFHK, Sponsor: Ocean Park Conservation Foundation, Hong Kong;

Funding text:This work was supported by a grant from the Hong Kong RGC (Project reference no. UGC/FDS13/E04/18). This work was also supported by a grant from The Education University of Hong Kong (Project reference no. RG 28/2020-2021R).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508382372

Title:Infrared target detection and tracking based on brain-inspired model and DNNs

Authors:Song, Yong (1, 2); Zhao, Yufei (1, 2); Yang, Xin (1, 2); Wu, Yao (3); Teng, Feifei (3); Hao, Qun (1, 2)

Author affiliation:(1) School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, Beijing; 100081, China; (3) Xi'an Research Institute of Applied Optics, Xi'an; 710065, China

Corresponding author:Song, Yong(yongsong@bit.edu.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11441

Part number:1 of 1

Issue title:2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications

Issue date:2020

Publication year:2020

Article number:114410B

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636606

Document type:Conference article (CA)

Conference name:2019 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications

Conference date:October 26, 2019 - October 28, 2019

Conference location:Beijing, China

Conference code:158580

Sponsor:China Instrument and Control Society (CIS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Infrared target detection and tracking technology has been widely used in the fields of transportation, medical, safety and military affairs, etc. However, there stills exists some challenges in infrared target detection and tracking, such as dim small target, complex background, target occlusion and appearance changes, etc. On the other hand, as the most effective bio-intelligence system, Human Visual System (HVS) has significant advantages in image processing. In this paper, several brain-inspired models (including lateral inhibition, receptive field, synchronous burst, visual attention, and cognitive memory) and Deep Neural Networks (DNNs) have been studied. Furthermore, the relevant mathematical models are established, the corresponding algorithms are proposed, and the comparison experiments are conducted. In summary, applying the brain-inspired models and DNNs to the infrared target detection and tracking is beneficial to achieve the accurate infrared target detection and robust tracking under complex conditions.

© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:14

Main heading:Target tracking

Controlled terms:Behavioral research - Brain - Complex networks - Deep neural networks - Medical imaging - Military photography - Neural networks - Optical data processing - Optical instruments

Uncontrolled terms:Brain-inspired - Complex background - Dim small targets - Human Visual System - Human visual systems - Infrared target detection - Intelligence systems - Lateral inhibition

Classification code:404.1 Military Engineering - 461.1 Biomedical Engineering - 722 Computer Systems and Equipment - 723.2 Data Processing and Image Processing - 941.3 Optical Instruments - 971 Social Sciences

DOI:10.1117/12.2543847

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5914277

Title:Ultra-dense optical data transmission over standard fibre with a single chip source

Authors:Corcoran, Bill (1); Tan, Mengxi (2); Xu, Xingyuan (2); Boes, Andreas (3); Wu, Jiayang (2); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6, 7); Mitchell, Arnan (3); Moss, David J. (2)

Author affiliation:(1) Photonic Communications Lab, Department of Electrical and Computer System Engineering, Monash University, Clayton; VIC; 3168, Australia; (2) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (3) Integrated Photonics and Applications Centre (InPAC), School of Engineering, RMIT University, Melbourne; VIC; 3001, Australia; (4) Department of Physics and Material Science, City University of Hong Kong, Tat Chee Avenue, Hong Kong; (5) Xi’an Institute of Optics and Precision Mechanics Precision Mechanics of CAS, Xi’an, China; (6) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Corresponding author:Corcoran, Bill(bill.corcoran@monash.edu)

Source title:Nature Communications

Abbreviated source title:Nat. Commun.

Volume:11

Issue:1

Issue date:December 1, 2020

Publication year:2020

Article number:2568

Language:English

E-ISSN:20411723

Document type:Journal article (JA)

Publisher:Nature Research

Abstract:Micro-combs - optical frequency combs generated by integrated micro-cavity resonators – offer the full potential of their bulk counterparts, but in an integrated footprint. They have enabled breakthroughs in many fields including spectroscopy, microwave photonics, frequency synthesis, optical ranging, quantum sources, metrology and ultrahigh capacity data transmission. Here, by using a powerful class of micro-comb called soliton crystals, we achieve ultra-high data transmission over 75 km of standard optical fibre using a single integrated chip source. We demonstrate a line rate of 44.2 Terabits s−1 using the telecommunications C-band at 1550 nm with a spectral efficiency of 10.4 bits s−1 Hz−1. Soliton crystals exhibit robust and stable generation and operation as well as a high intrinsic efficiency that, together with an extremely low soliton micro-comb spacing of 48.9 GHz enable the use of a very high coherent data modulation format (64 QAM - quadrature amplitude modulated). This work demonstrates the capability of optical micro-combs to perform in demanding and practical optical communications networks.

© 2020, The Author(s).

Number of references:44

Controlled terms:data set - data transmission - efficiency measurement - equipment - equipment component - operations technology

Classification code:901 Geobase: Related Topics

DOI:10.1038/s41467-020-16265-x

Funding details: Number: -, Acronym: ARC, Sponsor: Australian Research Council;

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201908611383

Title:Subspace Clustering Constrained Sparse NMF for Hyperspectral Unmixing

Authors:Lu, Xiaoqiang (1); Dong, Le (1); Yuan, Yuan (2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Computer Science, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:5

Issue date:May 2020

Publication year:2020

Pages:3007-3019

Article number:8891771

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:As one of the most important information of hyperspectral images (HSI), spatial information is usually simulated with the similarity among pixels to enhance the unmixing performance of nonnegative matrix factorization (NMF). Nevertheless, the similarity is generally calculated based on the Euclidean distance between pairwise pixels, which is sensitive to noise and fails in capturing subspace information of hyperspectral data. In addition, it is independent of the NMF framework. In this article, we propose a novel unmixing method called subspace clustering constrained sparse NMF (SC-NMF) for hyperspectral unmixing to more accurately extract endmembers and correspond abundances. First, the nonnegative subspace clustering is embedded into the NMF framework to learn a similar graph, which takes full advantage of the characteristics of the reconstructed data itself to extract the spatial correlation of pixels for unmixing. It is noteworthy that the similar graph and NMF will be simultaneously updated. Second, to mitigate the influence of noise in HSI, only the k largest values are retained in each self-expression vector. Finally, we use the idea of subspace clustering to extract endmembers by linearly combining of all pixels in spectral subspace, aiming at giving a reasonable physical significance to the endmembers. We evaluate the proposed SC-NMF on both synthetic and real hyperspectral data, and experimental results demonstrate that the proposed method is effective and superior by comparing with the state-of-The-Art methods.

© 1980-2012 IEEE.

Number of references:66

Main heading:Matrix algebra

Controlled terms:Clustering algorithms - Factorization - Image enhancement - Pixels - Spectroscopy - Vectors

Uncontrolled terms:Expression vectors - Hyperspectral unmixing - Nonnegative matrix factorization - Physical significance - Spatial correlations - Spatial informations - State-of-the-art methods - Sub-Space Clustering

Classification code:903.1 Information Sources and Analysis - 921 Mathematics - 921.1 Algebra

DOI:10.1109/TGRS.2019.2946751

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B15, Acronym: -, Sponsor: -;Number: 61825603, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received April 24, 2019; revised July 8, 2019; accepted October 1, 2019. Date of publication November 5, 2019; date of current version April 22, 2020. This work was supported in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61702498, in part by the National Natural Science Fund for Distinguished Young Scholars under Grant 61825603, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences (CAS) under Grant QYZDB-SSW-JSC015, in part by the National Key Research and Development Program of China under Grant 2017YFB0502900, and in part by the CAS Light of West China Program under Grant XAB2017B15. (Corresponding author: Xiaoqiang Lu.) X. Lu is with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China (e-mail: luxq666666@gmail.com).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202908938736

Title:Large-scale observation of an explosively formed projectile in flight using simultaneous shadow/direct high-speed imaging technique

Authors:Sun, Ce (1); Jia, Yangyu (2); Yang, Baoliang (2)

Author affiliation:(1) Beijing Key Lab. for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) Xi'an Modern Control Technology Institute, Xi'an; Shaanxi; 710065, China

Corresponding author:Sun, Ce(brave_sunce@163.com)

Source title:Optik

Abbreviated source title:Optik

Volume:219

Issue date:October 2020

Publication year:2020

Article number:165220

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:The explosively formed projectile (EFP) is an important warhead technology; its performance affects a weapon's ability to inflict damage on an intended target. The testing of EFPs is essential in performance evaluation, verification, and guidance design to improve the damage ability. In this study, an experimental system was developed to implement simultaneous shadow and reflective observation of high-speed EFP behaviour in flight. The self-luminescence can be filtered out by using a narrow-band pass filter and adjusting the appropriate aperture. The EFP shape and surrounding shock wave are clearly captured by a high-speed camera using shadow/direct photography. This work demonstrates the considerable capability of the imaging system for monitoring of ultrafast projectile with strong self- luminescence, and its great potential in similar observation applications.

© 2020 Elsevier GmbH

Number of references:20

Main heading:High speed photography

Controlled terms:Ability testing - Bandpass filters - High speed cameras - Luminescence - Projectiles - Shock waves

Uncontrolled terms:Damage ability - Experimental system - Explosively formed projectiles - High Speed - High speed imaging - Narrow-band pass filters - Ultra-fast

Classification code:703.2 Electric Filters - 741.1 Light/Optics - 742.1 Photography - 742.2 Photographic Equipment - 912.4 Personnel - 931 Classical Physics; Quantum Theory; Relativity

DOI:10.1016/j.ijleo.2020.165220

Funding text:The authors thank professor Yang for the experimental support.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109718762

Title:Design of a high-resolution compact optical system applied to micro-nano satellites

Authors:Qiao, Jiang (1); Wu, Cuigang (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, No. 17, Information Avenue, High-tech Zone, Xi'an City, Shanxi Province, China; (2) University of Chinese Academy of Sciences, Beijing City, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11617

Part number:1 of 1

Issue title:International Conference on Optoelectronic and Microelectronic Technology and Application

Issue date:2020

Publication year:2020

Article number:116173T

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510640696

Document type:Conference article (CA)

Conference name:2020 International Conference on Optoelectronic and Microelectronic Technology and Application

Conference date:October 20, 2020 - October 22, 2020

Conference location:Nanjing, China

Conference code:165962

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:In the field of space remote sensing technology, designing a long focal length, high resolution, compact optical imaging system is one of the current hotspots in the research of micro/nano satellites. Based on the general working lens structure and actual imaging requirements of micro/nano satellites, this paper uses paraxial imaging methods to analyze and calculate the various indicators of the lens. A high-resolution coaxial refractive optical system for space remote sensing satellites is designed. The system has the characteristics of long focal length, high resolution, and compact structure. Its working band is 380nm-780nm, focal length f is 1200mm, F/ # Is 6, the field of view angle can reach 2ω=1.4°. When the satellite orbit height is 420km and the sensor pixel size is 4.25μm, the geometries resolution GSD can reach 1.5m. Through multiple optimizations of the parameters, the final designed optical system has a full field of view MTF value greater than 0.28 at a spatial frequency of 188lp/mm, and the imaging effect is excellent, close to the diffraction limit.

© 2020 COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:20

Main heading:Optical systems

Controlled terms:Diffraction - Image resolution - Micro satellites - Microelectronics - Orbits - Remote sensing - Space optics

Uncontrolled terms:Compact structures - Diffraction limits - Long focal lengths - Micro/nano satellites - Multiple optimizations - Optical imaging system - Space remote sensing - Space remote sensing technology

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Size 1.20e+00m, Size 1.50e+00m, Size 3.80e-07m to 7.80e-07m, Size 4.20e+05m, Size 4.25e-06m

DOI:10.1117/12.2585521

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909588079

Title:Classification of skin cancer based on fluorescence lifetime imaging and machine learning

Authors:Yang, Qianqian (1); Qi, Meijie (1); Wu, Zhaoqing (1); Liu, Lixin (1, 2, 3); Gao, Peng (1); Qu, Junle (4)

Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) CAS Key Laboratory of Spectral Imaging Technology, Xi'an; 710119, China; (4) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen; 518060, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11553

Part number:1 of 1

Issue title:Optics in Health Care and Biomedical Optics X

Issue date:2020

Publication year:2020

Article number:115531Y

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639218

Document type:Conference article (CA)

Conference name:Optics in Health Care and Biomedical Optics X 2020

Conference date:October 11, 2020 - October 16, 2020

Conference location:Virtual, Online, China

Conference code:165064

Sponsor:Chinese Optical Society (COS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:To evaluate the development stage of skin cancer accurately is very important for prompt treatment and clinical prognosis. In this paper, we used the FLIM system based on time-correlated single-photon counting (TCSPC) to acquire fluorescence lifetime images of skin tissues. In the cases of full sample data, three kinds of sample set partitioning methods, including bootstrapping method, hold-out method and K-fold cross-validation method, were used to divide the samples into calibration set and prediction set, respectively. Then the binary classification models for skin cancer were established based on random forest (RF), K-nearest neighbor (KNN),support vector machine (SVM) and linear discriminant analysis (LDA) respectively. The results showed that FLIM combining with appropriate machine learning algorithms can achieve early and advanced canceration classification of skin cancer, which could provide reference for the multi-classification, clinical staging and diagnosis of skin cancer.

© 2020 SPIE. All rights reserved.

Number of references:12

Main heading:Learning algorithms

Controlled terms:Computer aided diagnosis - Decision trees - Dermatology - Discriminant analysis - Diseases - Fluorescence imaging - Health care - Learning systems - Nearest neighbor search - Particle beams - Support vector machines

Uncontrolled terms:Binary classification - Fluorescence lifetime imaging - Fluorescence lifetimes - K fold cross validations - K nearest neighbor (KNN) - Linear discriminant analysis - Multi-classification - Time-correlated single-photon counting

Classification code:461 Bioengineering and Biology - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921.5 Optimization Techniques - 922 Statistical Methods - 932.1 High Energy Physics - 961 Systems Science

DOI:10.1117/12.2573851

Funding details: Number: -, Acronym: -, Sponsor: Higher Education Discipline Innovation Project;Number: SKLST201804, Acronym: -, Sponsor: -;Number: LSIT202005W, Acronym: -, Sponsor: Jiangsu Key Laboratory of Spectral Imaging and Intelligence Sense;

Funding text:This work was supported by the 111 Project, the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences (SKLST201804) and the Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (LSIT202005W).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210709909846

Title:Image acquisition and display system of AOTF polarization spectrometer

Authors:Bu, Fan (1); Yao, Dalei (1); Qiu, Yuehong (1)

Author affiliation:(1) Space Optical Technology, Research Department, Xi'an Institute of Optics and Precision Mechanics. Cas, Shaanxi, China

Source title:ACM International Conference Proceeding Series

Abbreviated source title:ACM Int. Conf. Proc. Ser.

Part number:1 of 1

Issue title:Proceedings of the 2020 4th International Conference on Electronic Information Technology and Computer Engineering, EITCE 2020

Issue date:November 6, 2020

Publication year:2020

Pages:328-333

Language:English

ISBN-13:9781450387811

Document type:Conference article (CA)

Conference name:4th International Conference on Electronic Information Technology and Computer Engineering, EITCE 2020

Conference date:November 6, 2020 - November 8, 2020

Conference location:Virtual, Online, China

Conference code:166801

Publisher:Association for Computing Machinery

Abstract:AOTF (acousto-optic tunable filter)-based polarization spectroscopy imaging technology is an emerging cross-technical field. Exploring the application of this technology in military and civilian fields has become an important research topic at home and abroad. Compared with traditional instruments, AOTF polarization spectrometers have unique advantages in terms of working mechanism and instrument design. According to the working principle of AOTF and the working process of AOTF polarization spectrometer, an image acquisition and display technical scheme of polarizing spectrum imager based on the combination of AOTF and CCD camera is designed. In this paper, the host computer coded in VC++ is proposed to set some key parameters of CCD97-00 (EMCCD product of E2V Company) through USB2.0, such as exposure time, exposure interval, exposure gain and offset. Moreover, this system has single-frequency and continuous-sweep working modes under the control of the AOTF. After testing, the function of the system was verified. The results show that the system can efficiently and reliably collect polarized spectral image data and control corresponding instruments. It has certain research significance and practical value, and is providing large amount of image data for a follow-up study of polarized spectral images.

© 2020 ACM.

Number of references:16

Main heading:Image acquisition

Controlled terms:CCD cameras - Display devices - Imaging techniques - Polarization - Spectrometers - Spectroscopy

Uncontrolled terms:Acousto-optic tunable filters - Follow-up Studies - Imaging technology - Instrument designs - Polarization spectroscopy - Research significances - Spectral image data - Working mechanisms

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 722.2 Computer Peripheral Equipment - 723 Computer Software, Data Handling and Applications - 741.3 Optical Devices and Systems - 746 Imaging Techniques

DOI:10.1145/3443467.3444707

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204009265882

Title:Lasercom optical-terminal performance testing platform

Authors:Li, Jing (1); Xue, Xun (1); Wang, Zhengfeng (1); Liu, Kai (1); Zhou, Yan (1); Zhao, Jianke (1)

Author affiliation:(1) Xi’ an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710000, China

Corresponding author:Li, Jing(lijing871215@126.com)

Source title:Optik

Abbreviated source title:Optik

Volume:224

Issue date:December 2020

Publication year:2020

Article number:165521

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:The lasercom optical-terminal performance testing platform (LCOT-PTP) is a precision optical system providing experimental testing of important characteristic parameters including transmitting power, beam divergence angle, far-field spot energy distribution and coaxialities of different branches in a lasercom optical terminal (LCOT). The LCOT-PTP consisting of a telescope, beam splitters, a receiving branch, a transmitting branch and a tracking test branch is developed. Due to the testing process requirements in coarse tracking, fine tracking and the assembly integration, the working wavelengths of 808nm, 1550nm and 632.8nm are adopted in testing-system design. By using the under-test LCOT parameters and Gaussian beam transmitting theory, the optical-system design is completed. Based on the established LCOT-PTP, the key performance testing work is accomplished.

© 2020 Elsevier GmbH

Number of references:18

Main heading:Integration testing

Controlled terms:Gaussian beams - Optical systems - Systems analysis

Uncontrolled terms:Beam divergence angles - Energy distributions - Experimental testing - Optical terminal - Performance testing - Testing process - Testing systems - Transmitting power

Classification code:711 Electromagnetic Waves - 723.5 Computer Applications - 741.3 Optical Devices and Systems - 961 Systems Science

Numerical data indexing:Size 1.55e-06m, Size 6.33e-07m, Size 8.08e-07m

DOI:10.1016/j.ijleo.2020.165521

Funding details:

Funding text:This work is supported by the Western light Foundation of Chinese Academy of Science under Grant nos. XAB2016B18 and XAB2017B13 .

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204409407299

Title:Mathematical Derivation and Parameter Analysis of Phase-sensitive Detection Principle

Authors:Wang, Haisen (1, 2); Wang, Rui (1, 2); Qiao, Yongming (1); Lv, Tao (1, 2); Yang, Lulu (1, 2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, China; (2) University of Chinese Academy of Sciences, China

Source title:Proceedings - 2020 12th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2020

Abbreviated source title:Proc. - Int. Conf. Intell. Human-Mac. Syst. Cybern., IHMSC

Volume:2

Part number:2 of 2

Issue title:Proceedings - 2020 12th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2020

Issue date:August 2020

Publication year:2020

Pages:7-11

Article number:9204086

Language:English

ISBN-13:9781728165165

Document type:Conference article (CA)

Conference name:12th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2020

Conference date:August 22, 2020 - August 23, 2020

Conference location:Virtual, Hangzhou, China

Conference code:163320

Sponsor:IEEE Nanjing Section CIS Chapter

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Phase-sensitive detection is an effective method for high-precision detection of weak signals, but there is no detailed derivation and description of this principle in the previous literatures. This article based on the basic principle of phase-sensitive detection gives two different derivation methods of analog and digital phase-sensitive detection principles. Then the Matlab is used to verify the digital phase-sensitive detection principle and analyze the parameters. Finally, this article gives a reasonable range of parameter selection for phase-sensitive detection and guides the reader to make a good parameter selection when using phase-sensitive detection.

© 2020 IEEE.

Number of references:6

Main heading:Man machine systems

Uncontrolled terms:Basic principles - High precision detections - Mathematical derivation - Parameter analysis - Parameter selection - Phase sensitive detection - Weak signals

DOI:10.1109/IHMSC49165.2020.10081

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20211110079773

Title:Image semantic segmentation based on high-resolution networks for monitoring agricultural vegetation

Authors:Ganchenko, Valentin (1); Starovoitov, Valery (1); Zheng, Xiangtao (2)

Author affiliation:(1) United Institute of Informatics Problems, Minsk, Belarus; (2) Xi'An Institute of Optics and Precision Mechanics, Shaanxi, China

Corresponding author:Ganchenko, Valentin(ganchenko@lsi.bas-net.byemailxiangtaoz@gmail.com)Zheng, Xiangtao(xiangtaoz@gmail.com)

Source title:Proceedings - 2020 22nd International Symposium on Symbolic and Numeric Algorithms for Scientific Computing, SYNASC 2020

Abbreviated source title:Proc. - Int. Symp. Symb. Numer. Algorithms Sci. Comput., SYNASC

Part number:1 of 1

Issue title:Proceedings - 2020 22nd International Symposium on Symbolic and Numeric Algorithms for Scientific Computing, SYNASC 2020

Issue date:September 2020

Publication year:2020

Pages:264-269

Article number:9356943

Language:English

ISBN-13:9781728176284

Document type:Conference article (CA)

Conference name:22nd International Symposium on Symbolic and Numeric Algorithms for Scientific Computing, SYNASC 2020

Conference date:September 1, 2020 - September 4, 2020

Conference location:Virtual, Timisoara, Romania

Conference code:167393

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:In the article, recognition of state of agricultural vegetation from aerial photographs at various spatial resolutions was considered. Proposed approach is based on a semantic segmentation using convolutional neural networks. Two variants of High-Resolution network architecture (HRNet) are described and used. These neural networks were trained and applied to aerial images of agricultural fields. In our experiments, accuracy of four land classes recognition (soil, healthy vegetation, diseased vegetation and other objects) was about 93-94%.

© 2020 IEEE.

Number of references:27

Main heading:Image segmentation

Controlled terms:Agricultural robots - Agriculture - Antennas - Convolutional neural networks - Network architecture - Semantic Web - Semantics - Vegetation

Uncontrolled terms:Aerial images - Aerial Photographs - Agricultural fields - Agricultural vegetation - High resolution - Image semantics - Semantic segmentation - Spatial resolution

Classification code:723 Computer Software, Data Handling and Applications - 821 Agricultural Equipment and Methods; Vegetation and Pest Control - 903 Information Science

Numerical data indexing:Percentage 9.30e+01% to 9.40e+01%

DOI:10.1109/SYNASC51798.2020.00050

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200207991279

Title:Asymmetric near-zero edge mode in topological photonic lattice without chiral or particle-hole symmetries

Authors:Ji, Kaiwen (1); Liu, Zhenjuan (1); Dai, Yanan (1); Wen, Zengrun (2); Wang, Yishan (4); Zhang, Guoquan (3); Bai, Jintao (2); Qi, Xinyuan (1, 2)

Author affiliation:(1) School of Physics, Northwest University, Xi'an; 710127, China; (2) National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base), Institute of Photonics and Photon-Technology, Northwest University, Xi'an; 710127, China; (3) MOE Key Laboratory of Weak-Light Nonlinear Photonics, TEDA Applied Physics Institute, School of Physics, Nankai University, Tianjin; 300457, China; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Qi, Xinyuan(qixycn@nwu.edu.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:45

Issue:1

Issue date:January 1, 2020

Publication year:2020

Pages:49-52

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:Generally speaking, a one-dimensional system requires chiral or particle-hole symmetry to be topologically nontrivial. In this Letter, we show that topological behavior can also be observed in a quasi-one-dimensional photonic system without the aforementioned symmetries. The results indicate that the quantized Zak phase is achieved in such a system even though the chiral and particle-hole symmetries are still absent. Further study shows that the system can support a topologically protected asymmetric near-zero mode on the right edge. Our work enriches the concepts of design of topological photonics and may have important applications in future quantum computations.

© 2019 Optical Society of America.

Number of references:22

Main heading:Topology

Controlled terms:Optical lattices - Photonics - Quantum computers

Uncontrolled terms:One-dimensional systems - Particle-hole symmetry - Photonic systems - Quasi-one dimensional

Classification code:722 Computer Systems and Equipment - 741.1 Light/Optics - 744.8 Laser Beam Interactions - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1364/OL.45.000049

Funding details: Number: 2017JM6014, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: SKLST201805, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: OS17-3, Acronym: -, Sponsor: -;Number: 91750204, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. National Natural Science Foundation of China (91750204); Natural Science Foundation of Shaanxi Province (2017JM6014); Open fund of MOE Key Laboratory of Weak-Light Nonlinear Photonics (OS17-3); Open Research Fund of State Key Laboratory of Transient Optics and Photonics (SKLST201805).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109724787

Title:Channel-Grouping Based Patch Swap for Arbitrary Style Transfer????(Open Access)

Authors:Zhu, Yan (1); Niu, Yi (1); Li, Fu (1); Zou, Chunbo (2); Shi, Guangming (1)

Author affiliation:(1) The Telecommunication Engineering, School of Xidian University, China; (2) Xi'an Institute of Optics and Precision Mechanics of Cas, China

Source title:Proceedings - International Conference on Image Processing, ICIP

Abbreviated source title:Proc. Int. Conf. Image Process. ICIP

Volume:2020-October

Part number:1 of 1

Issue title:2020 IEEE International Conference on Image Processing, ICIP 2020 - Proceedings

Issue date:October 2020

Publication year:2020

Pages:613-617

Article number:9190962

Language:English

ISSN:15224880

ISBN-13:9781728163956

Document type:Conference article (CA)

Conference name:2020 IEEE International Conference on Image Processing, ICIP 2020

Conference date:September 25, 2020 - September 28, 2020

Conference location:Virtual, Abu Dhabi, United arab emirates

Conference code:165772

Sponsor:The Institute of Electrical and Electronics Engineers Signal Processing Society

Publisher:IEEE Computer Society

Abstract:The basic principle of the patch-matching based style transfer is to substitute the patches of the content image feature maps by the closest patches from the style image feature maps. Since the finite features harvested from one single aesthetic style image are inadequate to represent the rich textures of the content natural image, existing techniques treat the full-channel style feature patches as simple signal tensors and create new style feature patches via signal-level fusion. In this paper, we propose a channel-grouping based patch swap technique to group the style feature maps into surface and texture channels, and the new features are created by the combination of these two groups, which can be regarded as a semantic-level fusion of the raw style features. Experimental results demonstrate that the proposed method outperforms the existing techniques in providing more style-consistent textures while keeping the content fidelity.

© 2020 IEEE.

Number of references:17

Main heading:Image processing

Controlled terms:Semantics - Textures

Uncontrolled terms:Basic principles - Feature map - Image features - Natural images - Patch matching - Semantic-level fusion - Signal level

DOI:10.1109/ICIP40778.2020.9190962

Funding details: Number: 20191122015KYPT011JC013, Acronym: -, Sponsor: -;Number: 61632019,61672404,61751310,61836008,61875157, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2018YFB2202400, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: JC1904,JX18001,RW200141, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: JCKY2017204B102, Acronym: -, Sponsor: National Defense Basic Scientific Research Program of China;

Funding text:This work was supported in part by the National Key Research and Development Project of China (2018YFB2202400), NSFC (No. 61875157, 61672404, 61632019, 61751310 and 61836008), National Defense Basic Scientific Research Program of China (JCKY2017204B102), Science and Technology Plan of Xi’an (20191122015KYPT011JC013), the Fundamental Research Funds of the Central Universities of China (No. RW200141, JC1904 and JX18001).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20211110067785

Title:Hemoglobin detection based on excessively tilted fiber grating by non-covalent bonding

Authors:Sun, Yuezhen (1); Lu, Tean (1); Wang, Hushan (3); Sun, Qizhen (1, 2); Yan, Zhijun (1, 2); Liu, Deming (1, 2)

Author affiliation:(1) The School of Optical and Electronic Information, NGIA, Huazhong University of Science and Technology, Wuhan, China; (2) Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China; (3) Xi'an Institude of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Yan, Zhijun(yanzhijun@gmail.com)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Part number:1 of 1

Issue title:Asia Communications and Photonics Conference, ACPC 2020

Issue date:October 24, 2020

Publication year:2020

Language:English

ISBN-13:9781557528209

Document type:Conference article (CA)

Conference name:2020 Asia Communications and Photonics Conference, ACPC 2020/International Conference on Information Photonics and Optical Communications, IPOC 2020

Conference date:October 24, 2020 - October 27, 2020

Conference location:Beijing, China

Conference code:167560

Publisher:The Optical Society

Abstract:We have demonstrated a novel hemoglobin sensor based on hydroxide bond functionalized excessively tilted fiber grating. Due to non-covalent bonding between hydroxide bond and hemoglobin, such sensor could achieve hemoglobin detection with sensitivity around 1.93nm/(mg/ml).

© OSA 2020, © 2020 The Author(s)

Number of references:7

Main heading:Photonics

Controlled terms:Fiber bonding - Hemoglobin - Optical communication

Uncontrolled terms:Functionalized - Hydroxide bond - Non-covalent bondings - Tilted fiber gratings

Classification code:461.1 Biomedical Engineering - 717.1 Optical Communication Systems - 741.1 Light/Optics - 804 Chemical Products Generally

Funding details: Number: 2019AAA053/2018AAA040, Acronym: -, Sponsor: -;Number: 2018YFB2100902, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;

Funding text:This work was supported by the Science Fund for Creative Research Groups of the Nature Science Foundation of Hubei Province (2019AAA053/2018AAA040) ,the National Key Research and Development Program of China (2018YFB2100902)

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200308053970

Title:Gated and Axis-Concentrated Localization Network for Remote Sensing Object Detection

Authors:Lu, Xiaoqiang (1); Zhang, Yuanlin (1, 2); Yuan, Yuan (3); Feng, Yachuang (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Center for Optical Imagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:1

Issue date:January 2020

Publication year:2020

Pages:179-192

Article number:8827601

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:In the multicategory object detection task of high-resolution remote sensing images, small objects are always difficult to detect. This happens because the influence of location deviation on small object detection is greater than on large object detection. The reason is that, with the same intersection decrease between a predicted box and a true box, Intersection over Union (IoU) of small objects drops more than those of large objects. In order to address this challenge, we propose a new localization model to improve the location accuracy of small objects. This model is composed of two parts. First, a global feature gating process is proposed to implement a channel attention mechanism on local feature learning. This process takes full advantages of global features' abundant semantics and local features' spatial details. In this case, more effective information is selected for small object detection. Second, an axis-concentrated prediction (ACP) process is adopted to project convolutional feature maps into different spatial directions, so as to avoid interference between coordinate axes and improve the location accuracy. Then, coordinate prediction is implemented with a regression layer using the learned object representation. In our experiments, we explore the relationship between the detection accuracy and the object scale, and the results show that the performance improvements of small objects are distinct using our method. Compared with the classical deep learning detection models, the proposed gated axis-concentrated localization network (GACL Net) has the characteristic of focusing on small objects.

© 2019 IEEE.

Number of references:46

Main heading:Object detection

Controlled terms:Concentration (process) - Deep learning - Location - Object oriented programming - Object recognition - Remote sensing - Semantics

Uncontrolled terms:Attention mechanisms - Detection accuracy - gated axis-concentrated localization network (GACL Net) - High resolution remote sensing images - localization - Localization modeling - Object representations - Small object detection

Classification code:723.1 Computer Programming - 723.2 Data Processing and Image Processing

DOI:10.1109/TGRS.2019.2935177

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: QYZDY-SSW-JSC044, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B26, Acronym: -, Sponsor: -;Number: 61825603, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;Number: QYZDB-SSW-JSC015, Acronym: -, Sponsor: Chinese Academy of Sciences Key Technology Talent Program;Number: SKLST2017010, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 61632018, Acronym: -, Sponsor: -;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received January 29, 2019; revised May 10, 2019 and June 22, 2019; accepted August 9, 2019. Date of publication September 9, 2019; date of current version December 27, 2019. This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFB0502900, in part by the National Natural Science Foundation of China under Grant 61806193, Grant 61702498, Grant 61772510, Grant 61761130079, and Grant 61472413, in part by the National Natural Science Foundation for Distinguished Young Scholars under Grant 61825603, in part by the State Key Program of National Natural Science of China under Grant 61632018, in part by the Key Research Program of Frontier Sciences, CAS, under Grant QYZDY-SSW-JSC044, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, under Grant SKLST2017010, in part by the CAS Light of West China Program under Grant XAB2017B26 and Grant XAB2017B15, and in part by the Xi’an Postdoctoral Innovation Base Scientific Research Project. (Corresponding author: Xiaoqiang Lu.) X. Lu and Y. Feng are with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China (e-mail: luxq666666@gmail.com).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201208333407

Title:Effect of 0.1 THz Radiation on Excitability of Hippocampal Neurons in Sprague Dawley Rats

Title of translation:0.1 THz辐射对大鼠海马神经元兴奋性的影响

Authors:Zhang, Xinxin (1, 2, 3); He, Mingxia (1, 2, 3); Zhao, Jinwu (1, 2, 3); Chen, Xieyu (1, 3); Liu, Liyuan (1, 3); Lu, Xiaoyun (4); Tian, Tian (1, 2, 3); Chen, Mengqiu (1, 2, 3); Wang, Pu (1, 2, 3)

Author affiliation:(1) School of Precision Instrument & Opto-Electronics Engineering, Tianjin University, Tianjin; 300072, China; (2) State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin; 300072, China; (3) Terahertz Research Center, Tianjin University, Tianjin; 300072, China; (4) College of Life Science and Technology, Xi'an Jiaotong University, Xi'an; Shaanxi; 710048, China

Corresponding author:He, Mingxia(hhmmxx@tju.edu.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:47

Issue:2

Issue date:February 10, 2020

Publication year:2020

Article number:0207023

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press

Abstract:In this work, the effect of terahertz (THz) radiation on the excitability of hippocampal neurons is studied by changing the neuronal membrane potential and using hippocampal neurons in Sprague Dawley (SD) rats irradiated by a THz source with frequency of 0.1 THz and power density of 2.65 mW/cm2 for 5, 15, and 25 min, respectively. The results show that THz irradiation for 15 and 25 min causes a significant depolarization of the hippocampal neurons, thereby increasing neuron excitability. To explore the mechanism behind this THz radiation-induced excitability of neurons, the intracellular concentrations of Ca2+, Na+, and K+ are determined. The results show that Ca2+ and Na+ concentrations in the hippocampal neurons increase and K+ concentration decreases after irradiation by the THz source. Our study shows that the irradiation with frequency of 0.1 THz and power density of 2.65 mW/cm2 can promote neuronal excitation by regulating the concentration of charged ions in the hippocampal neurons. This finding may provide the preliminary experimental basis for the application of THz radiation technology to the biomedical field.

© 2020, Chinese Lasers Press. All right reserved.

Number of references:26

Main heading:Terahertz waves

Controlled terms:Electric excitation - Irradiation - Neurons - Radiation - Rats

Uncontrolled terms:Biomedicine - Fluorescence detection - Hippocampal neurons - Ion concentrations - Terahertz radiation

Classification code:461.9 Biology - 701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves

Numerical data indexing:Frequency 1.00e+11Hz, Surface_Power_Density 2.65e+01W/m2, Time 1.50e+03s, Time 9.00e+02s

DOI:10.3788/CJL202047.0207023

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200408064945

Title:Third-harmonic generation in CMOS-compatible highly doped silica micro-ring resonator????(Open Access)

Authors:Li, Yuhua (1); Wang, Shao Hao (2); Tian, Yayuan (3); Ho, Wai Lok (1); Li, Yangyang (3); Wang, Leiran (4, 5); Davidson, Roy R. (6); Little, Brent E. (4); Chu, Sai Tak (1)

Author affiliation:(1) Department of Physics, City University of Hong Kong, Kowloon Tong, Hong Kong; 999077, China; (2) Department of Microelectronics Science and Technology, Fuzhou University, Qi Shan Campus, Fuzhou; 350108, China; (3) Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong; 999077, China; (4) State Key Laboratory of Transient Optics and Photonics, XIOPM, CAS, Xi’an; 710119, China; (5) University of Chinese Academy of Sciences, Beijing; 100049, China; (6) QXP Technology, Xi’an; 710311, China

Corresponding author:Chu, Sai Tak(saitchu@cityu.edu.hk)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:28

Issue:1

Issue date:2020

Publication year:2020

Pages:641-651

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:We present the first demonstration of visible emission from highly doped silica glass micro-ring resonators (MRRs) through a third-harmonic generation (THG) nonlinear process. We obtain green light conversion efficiency of 2.7×10−5 W−2 in a MRR with loaded Q-factor of 1.4×106 pumped in the telecom band. A thermal nonlinear model is developed to account for the in-cavity power dependence of the resonance detuning. Using the extracted thermal nonlinear coefficients, the measured TH resonance shift is calibrated by subtracting the thermal nonlinear-induced phase mismatch to obtain the theoretical threefold wavelength relationship along with the measured cubic power relationship.

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Number of references:19

Main heading:Harmonic generation

Controlled terms:CMOS integrated circuits - Optical resonators - Q factor measurement - Silica

Uncontrolled terms:CMOS Compatible - Microring resonator - Non-linear model - Nonlinear coefficient - Nonlinear process - Power dependence - Resonance detuning - Visible emissions

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 942.2 Electric Variables Measurements

DOI:10.1364/OE.28.000641

Funding details: Number: 61675231,R-IND12101, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDB24030300, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2017J01756, Acronym: -, Sponsor: Natural Science Foundation of Fujian Province;

Funding text:National Natural Science Foundation of China (R-IND12101, 61675231); Natural Science Foundation of Fujian Province (2017J01756); Chinese Academy of Sciences (XDB24030300).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20210109714323

Title:Integrating design of a compact optical system for ultra-stable laser system

Authors:Zhang, Linbo (1, 2, 3); Chen, Long (1); Xu, Guanjun (1); Liu, Jun (1); Guo, Xinqian (1, 3); Jiang, Chenhui (1, 3); Fan, Le (1); Liu, Tao (1); Zhang, Shougang (1)

Author affiliation:(1) National Time Service Center, Chinese Academy of Sciences, Xi'An, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'An, China; (3) University of Chinese Academy of Science, Beijing, China

Corresponding author:Liu, Tao(taoliu@ntsc.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11717

Part number:1 of 1

Issue title:24th National Laser Conference and Fifteenth National Conference on Laser Technology and Optoelectronics

Issue date:2020

Publication year:2020

Article number:117170W

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510642690

Document type:Conference article (CA)

Conference name:24th National Laser Conference and 15th National Conference on Laser Technology and Optoelectronics

Conference date:October 17, 2020 - October 20, 2020

Conference location:Shanghai, China

Conference code:165963

Publisher:SPIE

Abstract:As the local oscillator of the space optical clock, the ultra-stable laser determines the short-to-medium-term frequency stability of the space optical clock. Considering the space station's restrictions on load weight and volume, as well as the impact of vibration and shock during launch, a tunable external cavity diode laser with small size, stable structure and no elastic adjustment device was developed. Optimized the design of the structure of the optical path board, developed small optical components, and developed a double-sided optical path system based on this. Experimental tests show that the free-running line width of the laser is about 175 kHz, which can run stably and reliably for a long time. At the same time, considering the deformation of the optical path substrate in the space microgravity environment, the topology optimization design of the optical board was carried out. Through mechanical simulation analysis, the maximum deformation of the optical path substrate under the influence of gravity is 0.43 µm, which initially meets the requirements of space applications.

© 2020 SPIE.

Number of references:9

Main heading:Optoelectronic devices

Controlled terms:Atomic clocks - Deformation - Optical systems - Optical variables measurement - Space applications - Space stations

Uncontrolled terms:Experimental test - External-cavity diode laser - Integrating design - Local oscillators - Mechanical simulations - Optical components - Space microgravity environments - Ultra-stable lasers

Classification code:656 Space Flight - 656.1 Space Flight - 741.3 Optical Devices and Systems - 941.4 Optical Variables Measurements - 943.3 Special Purpose Instruments

Numerical data indexing:Frequency 1.75e+05Hz

DOI:10.1117/12.2585448

Funding details: Number: SKLST201909, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;

Funding text:This work was supported by the Major Scientific Instruments and National Development Funding Projects of China (grant no. 61127901). The project was supported by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics (SKLST201909).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210309778734

Title:Investigating the effect of source contamination on eXTP/SFA

Authors:Zhang, Juan (1); Li, Gang (1); Ge, Mingyu (1); Kirsch, Christian (2); Lorenz, Maximilian (2); Wilms, Joern (2); Qi, Liqiang (1); Sheng, Lizhi (3); Yang, Yi-Jung (1); Dauser, Thomas (2); Xu, Yupeng (1); Lu, Fangju (1); Yang, Yanji (1); Wang, Yusa (1); Chen, Yong (1)

Author affiliation:(1) Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China; (2) Remeis Observatory and ECAP, University Erlangen-Nurnberg, Sternwartstr. 7, Bamberg; 96049, Germany; (3) XIOPM, Xi'an Institute of Optics and Precision Mechanics, CAS, NO.17 Xinxi Road, Xi'an, Shanxi, China

Corresponding author:Zhang, Juan(zhangjuan@ihep.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11444

Part number:1 of 1

Issue title:Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

Issue date:2020

Publication year:2020

Article number:114442I

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636750

Document type:Conference article (CA)

Conference name:Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray

Conference date:December 14, 2020 - December 18, 2020

Conference location:Virtual, Online, CA, United states

Conference code:166330

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:The Spectroscopy Focusing Array (SFA) onboard the enhanced X-ray Timing and Polarimetry (eXTP) observatory consists of 9 modules, each comprising a Wolter type I telescope with a field of view (FOV) around 16 arcminutes and a focal plane silicon drift detector (SDD) with 19 hexagonal pixels. Due to the large size of each individual SDD pixel (each pixel corresponds to an area of ∼ 3.6 arcminutes in diameter) and the limited pixel number, SFA can not obtain a real image of the observed region like many other X-ray imaging telescopes. Thus, contamination from nearby bright sources needs to be considered when we study the properties of the target source. We simulate such contaminations using the SIXTE simulator. In this paper we present the results by taking observations of the millisecond pulsar PSR J0437-4715 as an example, and discuss the cases for contamination on background or target source respectively.

© 2020 SPIE

Number of references:9

Main heading:X ray detectors

Controlled terms:Contamination - Gamma rays - Pixels - Pulsars - Space telescopes

Uncontrolled terms:Field of views - Focal Plane - Millisecond pulsars - Real images - Silicon Drift Detector - Target source - Xray imaging

Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 741.3 Optical Devices and Systems - 931.3 Atomic and Molecular Physics

DOI:10.1117/12.2561944

Funding details: Number: XDA15020501,XDA15020503, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:We acknowledge the support from the Strategic Priority Program on Space Science, China, the Chinese Academy of Sciences, Grant No. XDA15020501 and No. XDA15020503.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200908219748

Title:Application of target tracking and abnormal target detection algorithm in power network security

Authors:Yang, Xianwei (1, 2); Wang, Weifeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (2) University of Chinese Academy of Sciences, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11373

Part number:1 of 1

Issue title:Eleventh International Conference on Graphics and Image Processing, ICGIP 2019

Issue date:2020

Publication year:2020

Article number:113730I

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510635234

Document type:Conference article (CA)

Conference name:11th International Conference on Graphics and Image Processing, ICGIP 2019

Conference date:October 12, 2019 - October 14, 2019

Conference location:Hangzhou, China

Conference code:157182

Sponsor:College of Computer Science, Sichuan University; Ocean University of China; University of Portsmouth

Publisher:SPIE

Abstract:Targets such as plastic bags can absorb a lot of high-energy lasers which fired from the laser in a long distance. By aligning the laser center with the optical center of the high definition camera, we can determine that the laser emission point is located at the center of video. We can adjust the angle and position of the camera to make the video center coincide with the target, and finally accurately clean up the target from a long distance. In the process of video, this paper uses the target tracking algorithm based on template and the abnormal target detection method based on inter-frame difference. After we lock the target to be cleaned in a frame, the system can automatically calculate the angle and distance if the target swings in the wind, and send the corresponding motion command to the rotating device which can drive the camera to move, finally realize the target tracking and cleaning. Abnormal target detection algorithm is used to monitor the designated area near the target while emitting high-energy laser. When abnormal target such as human is found to enter, protection mechanism is triggered in time to turn off laser which can prevent dangerous accidents.

© 2019 SPIE.

Number of references:8

Main heading:Target tracking

Controlled terms:Cameras - Clutter (information theory) - Electric power transmission networks - High energy lasers - Motion tracking - Network security - Optical data processing - Plastic containers - Signal detection

Uncontrolled terms:Abnormal target detections - High definition - Inter-frame differences - Optical center - Power network security - Protection mechanisms - Rotating device - Target tracking algorithm

Classification code:706.1.1 Electric Power Transmission - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 742.2 Photographic Equipment - 744.1 Lasers, General - 817.1 Polymer Products

DOI:10.1117/12.2557202

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200708159015

Title:A Non-local Rank-Constraint Hyperspectral Images Denoising Method with 3-D Anisotropic Total Variation????(Open Access)

Authors:Gong, Tao (1, 2); Wen, Desheng (1); He, Tianbin (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (2) University of Chinese Academy of Sciences, China

Corresponding author:Gong, Tao(gongtao2017@opt.cn)

Source title:Journal of Physics: Conference Series

Abbreviated source title:J. Phys. Conf. Ser.

Volume:1438

Part number:1 of 1

Issue:1

Issue title:2019 4th International Conference on Communication, Image and Signal Processing, CCISP 2019

Issue date:January 11, 2020

Publication year:2020

Article number:012024

Language:English

ISSN:17426588

E-ISSN:17426596

Document type:Conference article (CA)

Conference name:2019 4th International Conference on Communication, Image and Signal Processing, CCISP 2019

Conference date:November 14, 2019 - November 16, 2019

Conference location:Phuket, Thailand

Conference code:157102

Publisher:IOP Publishing Ltd

Abstract:Hyperspectral Images (HSIs) are usually degraded by many kinds of noise called mixed noise, which greatly limits the subsequent applications of HSIs. Many researches have proved the patch-based low-rank methods and the total variation (TV) based approaches have a good effect on reducing noise in HSIs. Here, we propose a non-local patch based rank-constraint HSIs noise suppression methods with a global 3-D anisotropic total variation (NLRATV). Differing from previous patch-based methods which usually ignore spatial structural information, we add more structural constraints with the non-local similarity across patches for suppressing the structural noise that exists at the same location of many bands. Besides, we utilize the global 3-D anisotropic total variation to ensure its smoothness in spatial and spectral dimensionalities while reconstructing the image. The augmented Lagrange multiplier method is adopted to optimize the proposed algorithm. The real data experiments have proved the superiority of NLRATV in decreasing mixed and dense noise.

© Published under licence by IOP Publishing Ltd.

Number of references:31

Main heading:Lagrange multipliers

Controlled terms:Anisotropy - Image denoising - Spectroscopy

Uncontrolled terms:Augmented lagrange multiplier methods - Denoising methods - Noise suppression - Non-local similarities - Patch-based methods - Rank constraints - Spatial structural information - Structural constraints

Classification code:716.1 Information Theory and Signal Processing - 931.2 Physical Properties of Gases, Liquids and Solids

DOI:10.1088/1742-6596/1438/1/012024

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20204809541245

Title:Physical and Mechanical Characteristics of Lunar Soil at the Chang'E-4 Landing Site

Authors:Tang, Zhencheng (1, 2); Liu, Jianjun (1, 2); Wang, Xing (1, 2); Ren, Xin (1); Chen, Wangli (1); Yan, Wei (1); Zhang, Xiaoxia (1); Tan, Xu (1); Zeng, Xingguo (1); Liu, Dawei (1); Zhang, Hongbo (1, 2); Wen, Weibin (1); Zuo, Wei (1, 2); Su, Yan (1, 2); Yang, Jianfeng (3); C., Li

Author affiliation:(1) Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China; (2) School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Liu, Jianjun(liujj@nao.cas.cnemaillicl@nao.cas.cnemailliujj@nao.cas.cnemaillicl@nao.cas.cn)Li, Chunlai(licl@nao.cas.cnemailliujj@nao.cas.cnemaillicl@nao.cas.cn)Liu, Jianjun(liujj@nao.cas.cnemaillicl@nao.cas.cn)Li, Chunlai(licl@nao.cas.cn)

Source title:Geophysical Research Letters

Abbreviated source title:Geophys. Res. Lett.

Volume:47

Issue:22

Issue date:November 28, 2020

Publication year:2020

Article number:e2020GL089499

Language:English

ISSN:00948276

E-ISSN:19448007

CODEN:GPRLAJ

Document type:Journal article (JA)

Publisher:Blackwell Publishing Ltd

Abstract:Chang'E-4, with the Yutu-2 rover, is the first lunar probe to successfully land and conduct a tour on the far side of the Moon from early 2019. We analyze the physical and mechanical characteristics of lunar soil through the in situ terrain data collected by the panoramic camera onboard the Yutu-2 rover. With the slip ratio and wheel sinkage obtained by the derived Digital Orthophoto Map (DOM) and Digital Elevation Model (DEM), the mechanical parameters of lunar soil are derived from the slip-sinkage model. These mechanical parameters and wheel size of the rover are used to obtain the pressure-sinkage curves, which can estimate the lunar soil strength. The experimental results indicate that the soil strength at the Chang'E-4 landing site is much higher than that at the Chang'E-3 landing site. The discrepancies in lunar soil strength between the two landing sites may be related to the local surface topography and degree of space weathering.

©2020. American Geophysical Union. All Rights Reserved.

Number of references:34

Main heading:Lunar landing

Controlled terms:Landing - Mechanical properties - Moon - Soils - Surveying - Topography - Wheels

Uncontrolled terms:Digital elevation model - Landing site - Mechanical characteristics - Mechanical parameters - Orthophoto maps - Panoramic cameras - Soil strength - Space weathering

Classification code:405.3 Surveying - 483.1 Soils and Soil Mechanics - 601.2 Machine Components - 657.2 Extraterrestrial Physics and Stellar Phenomena - 951 Materials Science

DOI:10.1029/2020GL089499

Funding details: Number: Z191100004319001, Acronym: -, Sponsor: Beijing Municipal Science and Technology Commission;Number: 11941002, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was funded by the CE‐4 mission of Chinese Lunar Exploration Program (CLEP), National Natural Science Foundation of China (Grant No.11941002), and Beijing Municipal Science and Technology Commission (No. Z191100004319001). We are grateful to the team members of the Ground Research and Application System, who have contributed to data receiving and release.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200608138227

Title:Laser ranging-assisted binocular visual sensor tracking system????(Open Access)

Authors:Wang, Qilong (1); Zhang, Yu (2); Shi, Weichao (1); Nie, Meng (3)

Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an; 710048, China; (2) Beijing Aerospace Times Optical-electronic Technology CO, Ltd., China Aerospace Science and Technology Corp, Beijing; 100094, China; (3) School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing; 100044, China

Corresponding author:Wang, Qilong(wangql@xaut.edu.cn)

Source title:Sensors (Switzerland)

Abbreviated source title:Sensors

Volume:20

Issue:3

Issue date:February 1, 2020

Publication year:2020

Article number:688

Language:English

ISSN:14248220

Document type:Journal article (JA)

Publisher:MDPI AG

Abstract:Aimed at improving the low measurement accuracy of the binocular vision sensor along the optical axis in the process of target tracking, we proposed a method for auxiliary correction using a laser-ranging sensor in this paper. In the process of system measurement, limited to the mechanical performance of the two-dimensional turntable, the measurement value of a laser-ranging sensor is lagged. In this paper, the lag information is updated directly to solve the time delay. Moreover, in order to give full play to the advantages of binocular vision sensors and laser-ranging sensors in target tracking, federated filtering is used to improve the information utilization and measurement accuracy and to solve the estimated correlation. The experimental results show that the real-time and measurement accuracy of the laser ranging-assisted binocular visual-tracking system is improved by the direct update algorithm and the federal filtering algorithm. The results of this paper are significant for binocular vision sensors and laser-ranging sensors in engineering applications involving target tracking systems.

© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Number of references:22

Main heading:Target tracking

Controlled terms:Binocular vision - Binoculars - Clutter (information theory) - Information filtering - Information fusion - Time delay

Uncontrolled terms:Engineering applications - Information utilization - Laser ranging - Measurement accuracy - Mechanical performance - Target tracking systems - Two-dimensional turntables - Visual tracking systems

Classification code:713 Electronic Circuits - 716.1 Information Theory and Signal Processing - 741.2 Vision - 741.3 Optical Devices and Systems - 903.1 Information Sources and Analysis

DOI:10.3390/s20030688

Funding details: Number: 2019JM-468, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;

Funding text:This research was funded by the Natural Science Basic Research Program of Shaanxi (Program No. 2019JM-468).Funding: This research was funded by the Natural Science Basic Research Program of Shaanxi (Program No. 2019JM-468).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

Accession number:20204709505982

Title:Digital Simulation of Topological Matter on Programmable Quantum Processors????(Open Access)

Authors:Mei, Feng (1, 2); Guo, Qihao (3); Yu, Ya-Fei (4); Xiao, Liantuan (1, 2); Zhu, Shi-Liang (5, 6); Jia, Suotang (1, 2)

Author affiliation:(1) State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan, Shanxi; 030006, China; (2) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi; 030006, China; (3) School of Science, Xian Jiaotong University, Xian, Shaanxi; 710049, China; (4) Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou; 510006, China; (5) National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing; 210093, China; (6) Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, GPETR Center for Quantum Precision Measurement, Frontier Research Institute for Physics and SPTE, South China Normal University, Guangzhou; 510006, China

Source title:Physical Review Letters

Abbreviated source title:Phys Rev Lett

Volume:125

Issue:16

Issue date:October 2020

Publication year:2020

Article number:160503

Language:English

ISSN:00319007

E-ISSN:10797114

CODEN:PRLTAO

Document type:Journal article (JA)

Publisher:American Physical Society

Abstract:Simulating the topological phases of matter in synthetic quantum simulators is a topic of considerable interest. Given the universality of digital quantum simulators, the prospect of digitally simulating exotic topological phases is greatly enhanced. However, it is still an open question how to realize the digital quantum simulation of topological phases of matter. Here, using common single- and two-qubit elementary quantum gates, we propose and demonstrate an approach to design topologically protected quantum circuits on the current generation of noisy quantum processors where spin-orbital coupling and related topological matter can be digitally simulated. In particular, a low-depth topological quantum circuit is performed on both the IBM and Rigetti quantum processors. In the experiments, we not only observe but also distinguish the 0 and p energy topological edge states by measuring the qubit excitation distribution at the output of the circuits.

© 2020 American Physical Society.

Number of references:91

Main heading:Topology

Controlled terms:Quantum chemistry - Qubits

Uncontrolled terms:Current generation - Digital simulation - Excitation distribution - Quantum processors - Quantum simulations - Quantum simulators - Spin-orbital coupling - Topological phasis

Classification code:801.4 Physical Chemistry - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1103/PhysRevLett.125.160503

Funding details: Number: 201804020055, Acronym: -, Sponsor: -;Number: IRT_17R70, Acronym: -, Sponsor: -;Number: 12034012,12074234, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0304203, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 61775062,D18001, Acronym: -, Sponsor: Higher Education Discipline Innovation Project;Number: -, Acronym: -, Sponsor: Fund for Shanxi Key Subjects Construction;Number: 12074180,2016YFA0301800,2019B030330001,91636218, Acronym: -, Sponsor: Special Project for Research and Development in Key areas of Guangdong Province;Number: -, Acronym: -, Sponsor: Program for Changjiang Scholars and Innovative Research Team in University;

Funding text:F. M. thanks Heng Shen for invaluable help in improving the presentation of our manuscript and thanks Ying Hu and Dong-Ling Deng for helpful discussions. This work was supported by the National Key Research and Development Program of China (2017YFA0304203), the National Natural Science Foundation of China (NSFC) (12034012, 12074234), the Changjiang Scholars and Innovative Research Team at the University of Ministry of Education of China (PCSIRT)(IRT_17R70), the Fund for Shanxi 1331 Project Key Subjects Construction, and 111 Project (D18001). Y.-F. Y. was supported by the National Natural Science Foundation of China (No. 61775062). S. L. Z. was supported by the Key-Area Research and Development Program of GuangDong Province (Grant No. 2019B030330001), the National Key Research and Development Program of China (Grant No. 2016YFA0301800), the National Natural Science Foundation of China (Grants No. 91636218 and No. 12074180), and the Key Project of Science and Technology of Guangzhou (Grant No. 201804020055).F.M. thanks Heng Shen for invaluable help in improving the presentation of our manuscript and thanks Ying Hu and Dong-Ling Deng for helpful discussions. This work was supported by the National Key Research and Development Program of China (2017YFA0304203), the National Natural Science Foundation of China (NSFC) (12034012, 12074234), the Changjiang Scholars and Innovative Research Team at the University of Ministry of Education of China (PCSIRT)(IRT_17R70), the Fund for Shanxi 1331 Project Key Subjects Construction, and 111 Project (D18001). Y.-F.Y. was supported by the National Natural Science Foundation of China (No.?61775062). S.L.Z. was supported by the Key-Area Research and Development Program of GuangDong Province (Grant No.?2019B030330001), the National Key Research and Development Program of China (Grant No.?2016YFA0301800), the National Natural Science Foundation of China (Grants No.?91636218 and No.?12074180), and the Key Project of Science and Technology of Guangzhou (Grant No.?201804020055).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20205209688195

Title:Broadband RF channelization using microcombs

Authors:Xu, Xingyuan (1); Tan, Mengxi (1); Wu, Jiayang (2); Boes, Andreas (2); Nguyen, Thach G. (3); Chu, Sai T. (1); Little, Brent E. (4); Morandotti, Roberto (1); Mitchell, Arnan (1); Moss, David J. (1)

Author affiliation:(1) Swinburne University of Technology, Optical Sciences Centre, Hawthorn; VIC; 3122, Australia; (2) Rmit University, School of Engineering, Melbourne; VIC; 3000, Australia; (3) City University of Hong Kong, Department of Physics and Material Science, Tat Chee Avenue, Hong Kong, Hong Kong; (4) Xi'an Institute of Optics and Precision Mechanics Precision Mechanics of Cas, Xi'an, China

Source title:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020 - Proceedings

Abbreviated source title:Conf. Lasers Electro-Opt. Pac. Rim, CLEO-PR - Proc.

Part number:1 of 1

Issue title:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020 - Proceedings

Issue date:August 2020

Publication year:2020

Article number:9255942

Language:English

ISBN-13:9780646825045

Document type:Conference article (CA)

Conference name:2020 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2020

Conference date:August 3, 2020 - August 5, 2020

Conference location:Sydney, NSW, Australia

Conference code:165122

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We demonstrate RF channelizers based on 49GHz microcombs. 92 parallel channels and an instantaneous bandwidth of 8.08GHz are achieved for high-resolution RF spectral channelization. This approach is promising for integrated photonic RF receivers.

© 2020 IEEE.

Number of references:13

Uncontrolled terms:Channelizers - High resolution - Instantaneous bandwidth - Integrated photonics - Microcombs - Parallel channel - RF receivers

Numerical data indexing:Frequency 4.90e+10Hz, Frequency 8.08e+09Hz

DOI:10.1364/CLEOPR.2020.C7F_4

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20172903947104

Title:Openmre: A numerical platform for mre study

Authors:Li, Bing Nan (1); Shan, Xiang (1); Xiang, Kui (2); Kobayashi, Etsuko (3); Wang, Meng (4); Li, Xuelong (5)

Author affiliation:(1) Department of Biomedical Engineering, Hefei University of Technology, Hefei, China; (2) School of Automation, Wuhan University of Technology, Wuhan, China; (3) Department of Precision Engineering, University of Tokyo, Tokyo, Japan; (4) School of Computer Science and Information Engineering, Hefei University of Technology, Hefei, China; (5) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China

Corresponding author:Li, Bing Nan(bingoon@ieee.org)

Source title:IEEE Transactions on Systems, Man, and Cybernetics: Systems

Abbreviated source title:IEEE Trans. Syst. Man Cybern. Syst.

Volume:50

Issue:3

Issue date:March 2020

Publication year:2020

Pages:1111-1121

Article number:7970148

Language:English

ISSN:21682216

E-ISSN:21682232

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:Magnetic resonance elastography (MRE) offers a noninvasive solution to visualize the mechanical properties of soft tissue, but the study suffers from expensive magnetic resonance scanning. Moreover, translating MRE wave images into soft tissue elasticity is a nontrivial issue for clinical professionals and healthcare practitioners. An interactive system-OpenMRE-is thus developed with the aid of ImageJ for numerical MRE study. It is comprised of two comparatively independent toolkits, namely MREA for simulation and MREP for interpretation. MREA mainly deals with the forward problem of MRE, and provides a numerical platform to determine the propagation and distribution of specially designed elastic wave. It is possible to numerically study some state-of-The-Art paradigms including multisource and multifrequency MRE. The resultant wave images are interpretable in MREP that is designed for the inverse problem of MRE. It consists of the algorithms for phase unwrapping, directional filtering, and elasticity reconstruction. In a word, OpenMRE offers the MRE community a convenient and well-functioning system for interactive MRE study.

© 2013 IEEE.

Number of references:32

Main heading:Inverse problems

Controlled terms:Bioinformatics - Biomechanics - Computer simulation - Elastic waves - Elasticity - Magnetic resonance imaging - Magnetism - Medical imaging - Numerical models - Resonance - Tissue - Wave propagation

Uncontrolled terms:Biological tissues - Directional filtering - Elasticity reconstruction - Elastography - Forward problem - Interactive system - Magnetic resonance elastography - Phase unwrapping

Classification code:461 Bioengineering and Biology - 701.2 Magnetism: Basic Concepts and Phenomena - 723.5 Computer Applications - 746 Imaging Techniques - 921 Mathematics - 931.1 Mechanics

DOI:10.1109/TSMC.2017.2717481

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201108277661

Title:Exploiting Embedding Manifold of Autoencoders for Hyperspectral Anomaly Detection

Authors:Lu, Xiaoqiang (1); Zhang, Wuxia (1, 2); Huang, Ju (1, 2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Xi'An Institute of Optics and Precision Mechanics, University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:3

Issue date:March 2020

Publication year:2020

Pages:1527-1537

Article number:8889706

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:Hyperspectral anomaly detection is an important task in the remote sensing domain. Recently, researchers have shown great interest in deep learning-based methods because they can learn hierarchical, abstract, and high-level representations. However, the latent features learned from the autoencoder (AE) are not always able to reflect the intrinsic structure of hyperspectral data because the locality property is not considered during the learning process. In order to address this problem, a novel manifold constrained AE network (MC-AEN)-based hyperspectral anomaly detection method is proposed in this article. First, the manifold learning method is employed to learn the embedding manifold. Then, the latent representations are learned by an AE network with the learned embedding manifold constraints to preserve the intrinsic structure of hyperspectral data. Finally, the reconstruction errors are calculated to detect anomalies. The global reconstruction error from MC-AEN and the local reconstruction error from the learned latent representations are combined to fully utilize the learned knowledge for better detection performance. We test our proposed algorithm on three different real data sets. Experimental results on these three data sets show the superiority of our proposed method.

© 1980-2012 IEEE.

Number of references:47

Main heading:Anomaly detection

Controlled terms:Abstracting - Deep learning - Embeddings - Errors - Learning systems - Remote sensing - Spectroscopy

Uncontrolled terms:Auto encoders - Detection performance - Hyperspectral anomaly detection - Hyperspectral imagery - Intrinsic structures - Learning-based methods - Manifold learning - Reconstruction error

Classification code:903.1 Information Sources and Analysis

DOI:10.1109/TGRS.2019.2944419

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B15, Acronym: -, Sponsor: -;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received February 27, 2019; revised July 3, 2019; accepted September 17, 2019. Date of publication November 1, 2019; date of current version February 26, 2020. This work was supported in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61702498, in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the National Key R&D Program of China under Grant 2017YFB0502900, and in part by the CAS Light of West China Program under Grant XAB2017B15. (Corresponding author: Xiaoqiang Lu.) X. Lu is with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China (e-mail: luxq666666@gmail.com).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202908951759

Title:Unsupervised variational auto-encoder hash algorithm based on multi-channel feature fusion

Authors:Wang, Huanting (1, 2); Qu, Bo (1); Lu, Xiaoqiang (1); Chen, Yaxiong (1, 2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11519

Part number:1 of 1

Issue title:Twelfth International Conference on Digital Image Processing, ICDIP 2020

Issue date:2020

Publication year:2020

Article number:115191I

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510638457

Document type:Conference article (CA)

Conference name:12th International Conference on Digital Image Processing, ICDIP 2020

Conference date:May 19, 2020 - May 22, 2020

Conference location:Osaka, Japan

Conference code:161141

Sponsor:International Association of Computer Science and Information Technology

Publisher:SPIE

Abstract:Hashing technology is widely used to solve the problem of large-scale Remote Sensing (RS) image retrieval due to its high speed and low memory. Among the existing hashing algorithm, the unsupervised method is widely used in largescale RS image retrieval. However, the existing unsupervised RS image retrieval methods do not consider the multichannel properties of multi-spectral RS images and the discriminability in the local preservation mapping process adequately, which make it difficult to satisfy the retrieval performance of RS data. To solve these problems, we propose an unsupervised Variational Auto-Encoder Hashing algorithm based on multi-channel feature fusion (VAEH). MultiChannel Feature Fusion (MCFF) is used to extract the feature information of image, which fully considers the multichannel properties of the multi-spectral RS image. In order to enhance the discriminability in the local preservation mapping process, variational construction process and automatic encoder are added into the learning process of hashing function, and the KL distance of the Variational Auto-Encoder (VAE) is used to constrain the hashing code. Experiments on two large public RS image data sets (i.e. SAT-4 and SAT-6) have shown that our VAEH method outperforms the state of the art.

© 2020 SPIE.

Number of references:26

Main heading:Image processing

Controlled terms:Channel coding - Hash functions - Image retrieval - Learning systems - Photomapping - Remote sensing - Signal encoding

Uncontrolled terms:Construction process - Discriminability - Feature information - Hashing algorithms - Hashing functions - Remote sensing images - Retrieval performance - Unsupervised method

Classification code:405.3 Surveying - 716.1 Information Theory and Signal Processing

DOI:10.1117/12.2573106

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202008665815

Title:Deep balanced discrete hashing for image retrieval

Authors:Zheng, Xiangtao (1); Zhang, Yichao (1, 2); Lu, Xiaoqiang (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:403

Issue date:25 August 2020

Publication year:2020

Pages:224-236

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:Hashing has been widely used for large-scale multimedia retrieval because of its advantages in storage and retrieval efficiency. Traditional supervised hash methods represent an image as a feature vector and then perform a separate quantization step to generate a binary code. Due to the difficulty of discrete optimization of hash codes, continuous relaxation is generally used to replace discrete optimization. However, the process of continuous relaxation leads to inevitable quantization error. To avoid this drawback, a deep balanced discrete hashing method is proposed, which uses discrete gradient propagation with the straight-through estimator. The proposed method does not use the traditional continuous relaxation strategy, thereby reducing the quantization error caused by continuous relaxation. And the proposed method uses supervised information to directly guide the discrete coding and deep feature learning process. In the proposed method, the last layer of the Convolutional Neural Network (CNN) outputs the binary code directly. In the loss function, discrete values are calculated by combining the pairwise loss and a balance controlling term. The learned binary hash code maintains the similar relationship and label consistency at the same time. While maintaining the pairwise similarity, the proposed method keeps the balance of hash codes to improve retrieval performance. Extensive experiments show that the proposed method outperforms the state-of-the-art hashing methods on four image retrieval benchmark datasets.

© 2020 Elsevier B.V.

Number of references:62

Main heading:Learning systems

Controlled terms:Backpropagation - Binary codes - Convolutional neural networks - Deep learning - Hash functions - Image retrieval - Multilayer neural networks - Optimization - Vector quantization

Uncontrolled terms:Benchmark datasets - Continuous relaxation - Deep feature learning - Discrete optimization - Multimedia Retrieval - Quantization errors - Retrieval performance - Storage and retrievals

Classification code:723.1 Computer Programming - 723.4 Artificial Intelligence - 921.1 Algebra - 921.5 Optimization Techniques

DOI:10.1016/j.neucom.2020.04.037

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;Number: QYZDY-SSW-JSC044, Acronym: -, Sponsor: -;Number: XAB2017B26, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported in part by the National Natural Science Found for Distinguished Young Scholars under Grant 61925112, in part by the National Key R&D Program of China under Grant 2017YFB0502900, in part by the National Natural Science Foundation of China under Grant 61806193 , Grant 61702498 , and Grant 61772510 , in part by the Young Top-Notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the CAS "Light of West China" Program under Grant XAB2017B26, and Grant XAB2017B15, in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences under Grant QYZDY-SSW-JSC044.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203809211553

Title:Research on Fuzzy Adaptive Control Algorithm with Extended Dimension for Disturbance Torque

Authors:Changming, Lu (1); Xin, Gao (1); Meilin, Xie (2); Yu, Cao (3); Wei, Huang (2); Xuezheng, Lian (2); Kai, Liu (2); Wei, Hao (2)

Author affiliation:(1) Beijing Institute of Track and Telecommunication Technology, Beijing; 100094, China; (2) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of 2020 IEEE 5th Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Abbreviated source title:Proc. IEEE Inf. Technol. Mechatronics Eng. Conf., ITOEC

Part number:1 of 1

Issue title:Proceedings of 2020 IEEE 5th Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Issue date:June 2020

Publication year:2020

Pages:421-425

Article number:9141639

Language:English

ISBN-13:9781728143224

Document type:Conference article (CA)

Conference name:5th IEEE Information Technology and Mechatronics Engineering Conference, ITOEC 2020

Conference date:June 12, 2020 - June 14, 2020

Conference location:Chongqing, China

Conference code:161902

Sponsor:Chengdu Global Union Academy of Science and Technology; Chongqing Geeks Education Technology Co., Ltd; Chongqing Global Union Academy of Science and Technology; Global Union Academy of Science and Technology; IEEE Harbin Section

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:In order to solve the problem that friction, wire-wound, wind resistance and other disturbing moments seriously affect the stability tracking precision during the task of the photoelectric pod system, the fuzzy adaptive control algorithm with extended dimension is proposed in this paper. In this method, an accelerometer is first installed on the reflector of the pod. After obtaining the linear acceleration information and transforming it into angular acceleration, the fuzzy adaptive controller is designed according to the characteristics of wind resistance pulsation torque. The controller takes the mirror angular velocity, angular acceleration and target miss distance as input, and further adjusts the output of the controller according to the change of input and the fuzzy rule base of training. This algorithm was applied to the stable tracking experiment of a certain type of pod, and the results show that the tracking accuracy is improved from 59.7\mu\text{rad} to 32.4\ \mu\text{rad}. It is proved that the algorithm proposed in this paper can effectively suppress the disturbance torque and significantly improve the tracking accuracy and speed stability in the process of pod mission. This algorithm can be used in other servo control systems as a general method of disturbance torque suppression.

© 2020 IEEE.

Number of references:8

Main heading:Adaptive control systems

Controlled terms:Bridge cables - Controllers - Fuzzy control - Fuzzy inference - Fuzzy rules - Torque

Uncontrolled terms:Angular acceleration - Disturbance torque - Fuzzy adaptive control algorithms - Fuzzy adaptive controller - Linear accelerations - Servo control systems - Tracking accuracy - Tracking precision

Classification code:401.1 Bridges - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 731 Automatic Control Principles and Applications - 731.1 Control Systems - 732.1 Control Equipment - 931.2 Physical Properties of Gases, Liquids and Solids

DOI:10.1109/ITOEC49072.2020.9141639

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203109001683

Title:Effects of axial ultrasonic vibration on grinding quality in peripheral grinding and end grinding of ULE

Authors:Sun, Guoyan (1, 2); Shi, Feng (1); Ma, Zhen (2)

Author affiliation:(1) College of Mechatronics and Automation, National University of Defense Technology, Changsha; 410073, China; (2) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xin xi Road, Xi’an; 710119, China

Corresponding author:Sun, Guoyan(sunguoyan@opt.ac.cn)

Source title:International Journal of Advanced Manufacturing Technology

Abbreviated source title:Int J Adv Manuf Technol

Volume:109

Issue:7-8

Issue date:August 1, 2020

Publication year:2020

Pages:2285-2298

Language:English

ISSN:02683768

E-ISSN:14333015

CODEN:IJATEA

Document type:Journal article (JA)

Publisher:Springer

Abstract:Axial ultrasonic vibration–assisted grinding has been widely proved to be effective on the ground quality as well as efficiency for hard and brittle materials. However, the deference of two typical modes, axial ultrasonic vibration–assisted peripheral grinding (AUPG, vibration directions are parallel to the ground surface) and axial ultrasonic vibration–assisted end grinding (AUEG, vibration directions are vertical to the ground surface), exerting on the grinding process has not yet been thoroughly investigated. In this paper, the single grain kinematic functions corresponding to AUPG and AUEG have been created to theoretically analyze the interactional mechanism of peripheral grinding and end grinding respectively. For AUPG and AUEG, their axial ultrasonic vibrations are capable of increasing the dynamic contact length, decreasing the chip thickness, but their different effects on grinding behavior need further investigation. A series of comparative experiments have been conducted subsequently, and the results show that under the identical material removal rate, axial vibration in AUPG and AUEG can decrease the grinding forces, while AUEG is with a lower one than AUPG with a factor of 39.80%. With regard to the ground surface quality and subsurface damage, AUPG shows a positive effect while AUEG shows a negative role. The grinding kinematic, grinding force, ground surface quality, and subsurface damage have been analyzed in terms of the axial ultrasonic vibration effect on the peripheral grinding and end grinding behavior theoretically and experimentally, the conclusion will be meaningful for researchers to choose the appropriate approach in applying axial ultrasonic vibration to grinding optical elements.

© 2020, Springer-Verlag London Ltd., part of Springer Nature.

Number of references:26

Main heading:Vibration analysis

Controlled terms:Grinding (machining) - Kinematics - Surface properties - Ultrasonic effects - Ultrasonic waves

Uncontrolled terms:Comparative experiments - Different effects - Grinding behavior - Hard and brittle materials - Identical materials - Interactional mechanism - Sub-surface damage - Ultrasonic vibration

Classification code:604.2 Machining Operations - 753.1 Ultrasonic Waves - 931.1 Mechanics - 951 Materials Science

Numerical data indexing:Percentage 3.98e+01%

DOI:10.1007/s00170-020-05761-5

Funding details: Number: XAB2019B24, Acronym: -, Sponsor: -;Number: 51675526,51835013,U1801259, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (grant number 51835013, U1801259, 51675526) and CAS Light of West China Program (grant number XAB2019B24), China.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204609491413

Title:Using hyperspectral imaging automatic classification of gastric cancer grading with a shallow residual network

Authors:Liu, Song (1, 2); Wang, Quan (1, 3); Zhang, Geng (1); Du, Jian (1); Hu, Bingliang (1, 3); Zhang, Zhoufeng (1, 3)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Biomedical Spectroscopy of xi'An, Xi'an; 710119, China

Corresponding author:Hu, Bingliang(hbl@opt.ac.cnemailjczzf@163.com)Zhang, Zhoufeng(jczzf@163.com)

Source title:Analytical Methods

Abbreviated source title:Anal. Methods

Volume:12

Issue:30

Issue date:August 14, 2020

Publication year:2020

Pages:3844-3853

Language:English

ISSN:17599660

E-ISSN:17599679

Document type:Journal article (JA)

Publisher:Royal Society of Chemistry

Abstract:The gastric cancer grading of patients determines their clinical treatment plan. We use hyperspectral imaging (HSI) gastric cancer section data to automatically classify the three different cancer grades (low grade, intermediate grade, and high grade) and healthy tissue. This paper proposed the use of HSI data combined with a shallow residual network (SR-Net) as the classifier. We collected hyperspectral data from gastric sections of 30 participants, with the wavelength range of hyperspectral data being 374 nm to 990 nm. We compared the classification results between hyperspectral data and color images. The results show that using hyperspectral data and a SR-Net an average classification accuracy of 91.44% could be achieved, which is 13.87% higher than that of the color image. In addition, we applied a modified SR-Net incorporated direct down-sampling, asymmetric filters, and global average pooling to reduce the parameters and floating-point operations. Compared with the regular residual network with the same number of blocks, the floating-point operations of a SR-Net are one order of magnitude less. The experimental results show that hyperspectral data with a SR-Net can achieve cutting-edge performance with minimum computational cost and therefore have potential in the study of gastric cancer grading. This journal is

© The Royal Society of Chemistry.

Number of references:33

Main heading:Hyperspectral imaging

Controlled terms:Classification (of information) - Digital arithmetic - Diseases - Grading - Patient treatment - Spectroscopy

Uncontrolled terms:Asymmetric filters - Automatic classification - Classification accuracy - Classification results - Clinical treatment plans - Computational costs - Floating point operations - Hyperspectral Data

Classification code:461.6 Medicine and Pharmacology - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory

Numerical data indexing:Percentage 1.39e+01%, Percentage 9.14e+01%, Size 3.74e-07m to 9.90e-07m

DOI:10.1039/d0ay01023e

Funding details: Number: 2019JQ- 931, Acronym: -, Sponsor: -;Number: 201805050ZD1CG34, Acronym: -, Sponsor: -;Number: 2018JM6065, Acronym: -, Sponsor: -;

Funding text:This work was partly supported by the Nature Science Foundation of Shaanxi Province (No. 2018JM6065), Natural Science Basic Research Program of Shaanxi, China (Grant No. 2019JQ- 931), and Xi'an Key Laboratory for Biomedical Spectroscopy (201805050ZD1CG34).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200908234852

Title:Generation of non-Kolmogorov atmospheric turbulence phase screen using intrinsic embedding fractional Brownian motion method

Authors:Wang, Kaidi (1, 2); X., Su; Z., Li; S., Wu; W., Zhou; R., Wang; S., Chen; X., Wang

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Information Science and Technology, Northwest University, Xi'an; 710127, China; (4) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China

Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:207

Issue date:April 2020

Publication year:2020

Article number:164444

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:Generating phase screens to replace phase fluctuation caused by atmospheric turbulence is essential for simulation of light propagation through the atmosphere. Error between power spectral density of actual turbulence and traditional Kolmogorov model illustrates the importance of generating non-Kolmogorov phase screen. Meanwhile, methods used to generate phase screen at present show different kinds of disadvantages respectively. In this paper, we adopt a new method named "intrinsic embedding fractional Brownian motion (IE-FBM)". First, relationship between phase screen and FBM is analyzed. Next, principle of IE-FBM is clarified. We expand the correlation matrix and generate a stationary Gaussian surface through two fast Fourier transforms, which is the principle of intrinsic embedding. After that, we adjust the Gaussian surface into an FBM surface. Finally, simulation results demonstrate that IE-FBM combines advantages of traditional methods. Phase structure function becomes closer to theoretical value no matter how we set parameters of phase screen. Besides, both low and high frequency components of phase screen are sufficient and creases don't exist. In addition, time consumption reduces apparently. In conclusion, our method is comprehensively optimal choice to generate phase screen.

© 2020 Elsevier GmbH

Number of references:33

Main heading:Atmospheric turbulence

Controlled terms:Atmospheric thermodynamics - Brownian movement - Computational complexity - Embeddings - Fast Fourier transforms - Light propagation - Spectral density

Uncontrolled terms:Correlation matrix - Fractional brownian motion - Intrinsic embedding (IE) - Kolmogorov - Low and high frequencies - Phase screen - Structure functions - Theoretical values

Classification code:443.1 Atmospheric Properties - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 741.1 Light/Optics - 801.3 Colloid Chemistry - 921.3 Mathematical Transformations

DOI:10.1016/j.ijleo.2020.164444

Funding details: Number: GQRC-19-23, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This research and the APC was funded by Strategic High Technology Innovation Funding of Chinese Academy of Sciences , grant number GQRC-19-23 .

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009608642

Title:Attribute-Cooperated Convolutional Neural Network for Remote Sensing Image Classification

Authors:Zhang, Yuanlin (1); Zheng, Xiangtao (1); Yuan, Yuan (2); Lu, Xiaoqiang (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Center for Optical Imagery Analysis and Learning, School of Computer Science, Northwestern Polytechnical University, Xi'an; 710072, China

Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:12

Issue date:December 2020

Publication year:2020

Pages:8358-8371

Article number:9082147

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Remote sensing image (RSI) classification is one of the most important fields in RSI processing. It is well known that RSIs are very complicated due to its various kinds of contents. Therefore, it is very difficult to distinguish different scene categories with similar visual contents, like desert and bare land. To address hard negative categories, an attribute-cooperated convolutional neural network (ACCNN) is proposed to exploit attributes as additional guiding information. First, the classification branch extracts convolutional neural network feature, which is then utilized to recognize the RSI scene categories. Second, the attribute branch is proposed to make the network distinguish scene categories efficiently. The proposed attribute branch shares feature extraction layers with the classification branch and makes the classification branch aware of extra attribute information. Finally, the relationship branch constraints the relationship between the classification branch and the attribute branch. To exploit the attribute information, three attribute-classification data sets are generated (AC-AID, AC-UCM, and AC-Sydney). Experimental results show that the proposed method is competitive to state-of-the-art methods. The data sets are available at https://github.com/CrazyStoneonRoad/Attribute-Cooperated-Classification-Data sets.

© 1980-2012 IEEE.

Number of references:64

Main heading:Classification (of information)

Controlled terms:Convolution - Convolutional neural networks - Image classification - Remote sensing

Uncontrolled terms:Attribute information - Bare lands - Guiding information - Remote sensing image classification - Remote sensing images - Scene categories - State-of-the-art methods - Visual content

Classification code:716.1 Information Theory and Signal Processing

DOI:10.1109/TGRS.2020.2987338

Funding details: Number: 2017YFB0502900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 61632018, Acronym: -, Sponsor: -;Number: XAB2017B26,XAB2017B15,61825603,QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61925112, Acronym: -, Sponsor: National Science Fund for Distinguished Young Scholars;Number: 61702498,61806193,61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received September 12, 2019; revised November 26, 2019 and February 9, 2020; accepted April 6, 2020. Date of publication April 29, 2020; date of current version November 24, 2020. This work was supported in part by the National Natural Science Fund for Distinguished Young Scholars under Grant 61925112, in part by the National Key Research and Development Program of China under Grant 2017YFB0502900, in part by the National Natural Science Foundation of China under Grant 61806193, Grant 61702498, and Grant 61772510, in part by the Young Top-Notch Talent Program of the Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the CAS "Light of West China" Program under Grant XAB2017B26 and Grant XAB2017B15, in part by the National Natural Science Fund for Distinguished Young Scholars under Grant 61825603, and in part by the State Key Program of the National Natural Science of China under Grant 61632018. (Corresponding author: Xiangtao Zheng.) Yuanlin Zhang is with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China, and also with the University of Chinese Academy of Sciences, Beijing 100049, China.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200207985490

Title:Deep discrete hashing with pairwise correlation learning

Authors:Chen, Yaxiong (1, 2); Lu, Xiaoqiang (1)

Author affiliation:(1) The Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Lu, Xiaoqiang(luxiaoqiang@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:385

Issue date:14 April 2020

Publication year:2020

Pages:111-121

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:Hashing technology plays an important role in large-scale visual search due to its low memory and fast retrieval speed. Most existing deep hashing approaches first leverage the continuous relaxation strategy to learn continuous approximate codes, and then transform them into discrete hash codes by separating quantization operations, which results in the suboptimal problem of hash codes and ultimately affects the performance of image retrieval. To solve this problem, we propose a novel deep discrete hashing approach with pairwise labels, namely Pairwise Correlation Discrete Hashing (PCDH), to leverage the pairwise correlation of deep features and semantic supervised information to directly guide discrete hashing codes learning. Firstly, we integrate discrete hash code learning and deep features learning in a unified network framework, which can utilize the semantic supervision to guide discrete hash codes learning. Secondly, we design a novel pairwise correlation constraint to perform pairwise correlation learning of deep features. Thirdly, we develop a novel pairwise construction module to mine good pairwise samples for discrete hash codes learning. Extensive experimental results show that the proposed PCDH approach achieves superior performance over other recent state-of-the-art hashing approaches.

© 2019 Elsevier B.V.

Number of references:62

Main heading:Deep learning

Controlled terms:Hash functions - Image retrieval - Semantics

Uncontrolled terms:Continuous relaxation - Discrete hashing - Fast retrievals - Network frameworks - Pairwise correlation - Pairwise labels - Quantization operations - Visual search

DOI:10.1016/j.neucom.2019.12.078

Funding details: Number: 61925112, Acronym: -, Sponsor: China National Funds for Distinguished Young Scientists;Number: XAB2017B15, Acronym: -, Sponsor: -;Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: QYZDB-SSW-JSC015, Acronym: -, Sponsor: Chinese Academy of Sciences Key Technology Talent Program;Number: QYZDY-SSW-JSC044, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:We thank the anonymous reviewers for their feedback and helpful suggestions. This work was supported in part by the China National Funds for Distinguished Young Scientists under Grant 61925112 ; in part by the National Natural Science Foundation of China under grant 61772510 and 61702498 ; in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) under grant QYZDY-SSW-JSC044; in part by the Young Top-notch Talent Program of Chinese Academy of Sciences under grant QYZDB-SSW-JSC015 ; in part by the National Key R&D Program of China under grant 2017YFB0502900; and in part by the CAS "Light of West China" Program under grant XAB2017B15. Yaxiong Chen is currently pursuing the Ph.D. degree with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China and with The University of Chinese Academy of Sciences, Beijing 100049, P. R. China. His main research interests are pattern recognition, machine learning, and computer vision. Xiaoqiang Lu is currently a full professor with the Key Laboratory of Spectral Imaging Technology CAS, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, China. His current research interests include pattern recognition, machine learning, hyperspectral image analysis, cellular automata, and medical imaging.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204109320029

Title:Tuning optical force of dielectric/metal core-shell placed above Au film????(Open Access)

Title of translation:金薄膜衬底上介质-金属核壳结构的光学力调控????(Open Access)

Authors:Zhang, Jia-chen (1); Yu, Wei-xing (2); Xiao, Fa-jun (1); Zhao, Jian-lin (2)

Author affiliation:(1) Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China

Corresponding author:Xiao, Fa-jun(fjxiao@nwpu.edu.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:69

Issue:18

Issue date:September 20, 2020

Publication year:2020

Article number:184206

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences

Abstract:Manipulating the core-shell structure with the optical force has been extensively studied, giving birth to applications such as particle sorting, biomarkers and drug delivery. Tailoring the optical force exerted on the core-shell above the metallic film remains unexplored, despite the obvious benefits for both fundamental research and applications including strong coupling, surface enhanced spectroscopy, nanolaser, and nanoscale sensing. In this work, we systematically investigate the optical force exerted on a dielectric/metal core-shell above a gold film by utilizing the Maxwell stress tensor formalism. It is found that at the present gold substrate, the optical force on the core-shell can be one order of magnitude larger than that on the individual core-shell due to the strong coupling between the core-shell and the gold film. Interestingly, the direction of the optical force can be reversed from positive to negative by distributing the local field from the upside of core-shell to the structure gap through changing the excitation wavelength. Furthermore, we demonstrate that the magnitude and peak wavelength of the optical force can be well controlled by altering the structure gap, the size and refractive index of the core. More specifically, it is found that the coupling strength between the core-shell and the gold film decreases with the gap size increasing. As a result, we observe the blue shift of bonding mode and the decrease of local field in the gap, which leads the force peak wavelength to be blue-shifted and the force peak magnitude to decrease, respectively. Also, by increasing the radius and refractive index of the core, a red shift of force peak is accompanied with the red shift of the bonding mode. In addition, the force peak magnitude follows the same trend as the total local field enhancement factor when the radius and refractive index of the core change. We hope that our results open the way to control the cavity size of particle on film structure, which would be beneficial for tailoring the light matter interaction even down to single molecular level and promises to have the applications in novel functional photonic devices.

© 2020 Chinese Physical Society.

Number of references:37

Main heading:Shells (structures)

Controlled terms:Blue shift - Controlled drug delivery - Doppler effect - Gold - Metallic films - Photonic devices - Red Shift - Refractive index - Screening

Uncontrolled terms:Core shell structure - Coupling strengths - Excitation wavelength - Fundamental research - Light-matter interactions - Local field enhancement - Maxwell stress tensors - Surface enhanced spectroscopy

Classification code:408.2 Structural Members and Shapes - 547.1 Precious Metals - 741.1 Light/Optics - 802.3 Chemical Operations

DOI:10.7498/aps.69.20200214

Funding details: Number: LSIT201913W, Acronym: -, Sponsor: -;Number: 11634010,11874050,61675170, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017YFA0303800, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 310201911fz049,3102019JC008, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:* Project supported by the National Key R&D Program of China (Grant No. 2017YFA0303800), the National Natural Science Foundation of China (Grant Nos. 11634010, 61675170, 11874050), the Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology, China (Grant No. LSIT201913W), and the Fundamental Research Fund for the Central Universities, China (Grant Nos. 3102019JC008, 310201911fz049). † Corresponding author. E-mail: fjxiao@nwpu.edu.cn

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20184105927717

Title:Spectral Clustering by Joint Spectral Embedding and Spectral Rotation????(Open Access)

Authors:Pang, Yanwei (1); Xie, Jin (1); Nie, Feiping (2); Li, Xuelong (3)

Author affiliation:(1) School of Electrical and Information Engineering, Tianjin University, Tianjin; 300072, China; (2) Center for Optical Imagery Analysis and Learning, Northwestern Polytechnical University, Xi'an; 710071, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Nie, Feiping(feipingnie@gmail.com)

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:50

Issue:1

Issue date:January 2020

Publication year:2020

Pages:247-258

Article number:8480876

Language:English

ISSN:21682267

E-ISSN:21682275

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:Spectral clustering is an important clustering method widely used for pattern recognition and image segmentation. Classical spectral clustering algorithms consist of two separate stages: 1) solving a relaxed continuous optimization problem to obtain a real matrix followed by 2) applying K-means or spectral rotation to round the real matrix (i.e., continuous clustering result) into a binary matrix called the cluster indicator matrix. Such a separate scheme is not guaranteed to achieve jointly optimal result because of the loss of useful information. To obtain a better clustering result, in this paper, we propose a joint model to simultaneously compute the optimal real matrix and binary matrix. The existing joint model adopts an orthonormal real matrix to approximate the orthogonal but nonorthonormal cluster indicator matrix. It is noted that only in a very special case (i.e., all clusters have the same number of samples), the cluster indicator matrix is an orthonormal matrix multiplied by a real number. The error of approximating a nonorthonormal matrix is inevitably large. To overcome the drawback, we propose replacing the nonorthonormal cluster indicator matrix with a scaled cluster indicator matrix which is an orthonormal matrix. Our method is capable of obtaining better performance because it is easy to minimize the difference between two orthonormal matrices. Experimental results on benchmark datasets demonstrate the effectiveness of the proposed method (called JSESR).

© 2018 IEEE.

Number of references:52

Main heading:K-means clustering

Controlled terms:Image segmentation - Matrix algebra - Optimization - Pattern recognition

Uncontrolled terms:Benchmark datasets - Clustering methods - Clustering results - Continuous optimization problems - Normalized cuts - Spectral clustering - Spectral clustering algorithms - Spectral embedding

Classification code:921.1 Algebra - 921.5 Optimization Techniques

DOI:10.1109/TCYB.2018.2868742

Funding details: Number: 61632081, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2014CB340400,61761130079,61871470, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: -, Acronym: -, Sponsor: National Key Basic Research Program For Youth;

Funding text:Manuscript received May 15, 2018; revised August 22, 2018; accepted August 27, 2018. Date of publication October 3, 2018; date of current version October 22, 2019. This work was supported in part by the National Natural Science Foundation of China under Grant 61632081, in part by the National Program on Key Basic Research Project (973 Program) under Grant 2014CB340400, and in part by the National Natural Science Foundation of China under Grant 61871470 and Grant 61761130079. This paper was recommended by Associate Editor R. Tagliaferri. (Corresponding author: Feiping Nie.) Y. Pang and J. Xie are with the School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China (e-mail: pyw@tju.edu.cn; jinxie@tju.edu.cn).This work was supported in part by the National Natural Science Foundation of China under Grant 61632081, in part by the National Program on Key Basic Research Project (973 Program) under Grant 2014CB340400, and in part by the National Natural Science Foundation of China under Grant 61871470 and Grant 61761130079.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20203709173586

Title:Reflection grating spectrometer based on AOTF

Authors:Tang, Qian (1); Zhang, Guo Qing (1); Zhang, Chun Min (1); Zhao, Bao Chang (2)

Author affiliation:(1) Institute of Space Optics, School of Science, Ministry of Education, Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Space Optical Technology Research Department, Xi'an; 710119, China

Corresponding author:Tang, Qian(tangqian@xjtu.edu.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11455

Part number:1 of 1

Issue title:Sixth Symposium on Novel Optoelectronic Detection Technology and Applications

Issue date:2020

Publication year:2020

Article number:114555Y

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510637047

Document type:Conference article (CA)

Conference name:6th Symposium on Novel Optoelectronic Detection Technology and Applications

Conference date:December 3, 2019 - December 5, 2019

Conference location:Beijing, China

Conference code:162270

Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory

Publisher:SPIE

Abstract:As for detecting the atmosphere, a spectrometer includes five sub-spectrometers (two UV spectrometers, one VIS/IR spectrometer and two SWIR spectrometers) covering 240-2400nm is proposed. The spectrometer will be operated at height of 400km in three viewing modes (Limb, Occultation and Nadir). The spatial resolution is better than 100km2 in the three modes. This article introduces one of the five sub-spectrometers which is based on AOTF (AOTF: Acoustic-Optic Tunable Filter) and working in 1500-2400nm. This scheme utilizes AOTF to select different spectral ranges with 80cm-1 wave number, and then realizes the resolution of 0.1nm (λ/Δλ >105) by a reflection grating. Instead of the parabolic reflector, a transmission light group is selected. The detail design indexes are given and stimulated by Zemax.

© 2020 SPIE.

Number of references:16

Main heading:Vanadium metallography

Controlled terms:Light transmission - Spectrometers - Uranium metallography

Uncontrolled terms:Acoustic-optic tunable filters - Detail design - Parabolic reflector - Reflection grating spectrometers - Reflection gratings - Spatial resolution - Spectral range - Wave numbers

Classification code:531.2 Metallography - 547 Minor, Precious and Rare Earth Metals and Alloys - 741.1 Light/Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Area 1.00e+08m2, Size 1.50e-06m to 2.40e-06m, Size 2.40e-07m to 2.40e-06m, Size 4.00e+05m

DOI:10.1117/12.2565203

Funding details: Number: 61501361, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. National Natural Science Foundation of China (NSFC) (61501361).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200808197165

Title:Femtosecond laser-induced non-centrosymmetric surface microstructures on bulk metallic glass for unidirectional droplet micro-displacement

Authors:Li, Chen (1); Yang, Lijun (1); Ren, Xuezhuang (1); Yang, Yong (2); Cheng, Guanghua (3)

Author affiliation:(1) College of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (3) School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China

Source title:Journal of Physics D: Applied Physics

Abbreviated source title:J Phys D

Volume:53

Issue:10

Issue date:2020

Publication year:2020

Article number:105305

Language:English

ISSN:00223727

E-ISSN:13616463

CODEN:JPAPBE

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:Unidirectional droplet motion without energy input has attracted considerable attention in various potential applications. We report on the fabrication of unconventional laser-induced periodic surface structures (LIPSS) for unidirectional droplet micro-displacement by a femtosecond laser at a large incident angle. In order to overcome the mechanical durability of the existing soft materials such as PDMS for controlling the droplet, Zr-based bulk metallic glass (Zr-BMG) is used to fabricate the typical non-centrosymmetric unconventional LIPSS, which include micro-sized elliptical arc-shaped structures and nano-ripples with the central spatial periodicity of 400 nm. The spots and the grating of unconventional LIPSS on Zr-BMG are fabricated to construct the functional surface structures by femtosecond laser irradiation. The unidirectional micro-displacement of water droplet on Zr-BMG was achieved using functional surface structures. For better understanding the fabrication of unconventional LIPSS, the underlying formation mechanism was revealed by numerical simulations. This work gives a fast, precise and low-cost method to fabricate the non-centrosymmetric surface micro/nano-structures on metal materials for unidirectional droplet motion in microfluidics.

© 2019 IOP Publishing Ltd.

Number of references:43

Main heading:Metallic glass

Controlled terms:Drops - Fabrication - Femtosecond lasers - Glass - Metals - Ultrafast lasers

Uncontrolled terms:Bulk metallic glass - Droplet motion - Laser surface - Laser-induced periodic surface structures - LIPSS - Mechanical durability - Surface microstructures - Zr based bulk metallic glass

Classification code:531 Metallurgy and Metallography - 744.1 Lasers, General - 812.3 Glass

Numerical data indexing:Size 4.00e-07m

DOI:10.1088/1361-6463/ab5df7

Funding details: Number: 18JK0101, Acronym: -, Sponsor: Scientific Research Plan Projects of Shaanxi Education Department;Number: SKLST201708, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 61705124, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2016BJ-78, Acronym: SUST, Sponsor: Shaanxi University of Science and Technology;Number: 2019JQ-078, Acronym: -, Sponsor: -;Number: 2018YFB1107401, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was partially funded by the National Natural Science Foundation of China (NSFC) (Grant No. 61705124); Opening Fund of State Key Laboratory of Transient Optics and Photonics (Grant No. SKLST201708); National Key Research and Development Program (2018YFB1107401); Scientific Research Plan Projects of Shaanxi Provincial Education Department (Grant No. 18JK0101); Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2019JQ-078); Doctoral Research Fund from Shaanxi University of Science and Technology (Grant No. 2016BJ-78); The Youth Innovation Team of Shaanxi Universities

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20211210122830

Title:Time-dependent global nonsingular fixed-time terminal sliding mode control-based speed tracking of permanent magnet synchronous motor????(Open Access)

Authors:Wu, Shaobo (1, 2); Su, Xiuqin (1); Wang, Kaidi (1, 2)

Author affiliation:(1) Chinese Academy of Sciences Key Laboratory of Space Precision Measurement, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Su, Xiuqin(suxiuqin@opt.ac.cn)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:186408-186420

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:This paper studies global nonsingular fixed-time terminal sliding mode control (GNFTSMC) for a second-order uncertain permanent magnet synchronous motor (PMSM) system to further improve its speed tracking performance. The newly proposed GNFTSMC consists of a time-dependent terminal sliding surface and a piecewise continuous sliding mode control law. By a time-dependent function constructed from the initial conditions of the system and a predefined time, the sliding surface is always reached at the initial instant and forced to a traditional fast terminal sliding surface after the predefined time. Based on Filippov's stability principles, the globally fixed-time stability of the GNFTSMC is proved. Furthermore, a priori time independent of the initial conditions is derived to estimate the boundary of the settling time of the closed control loop. Then, the control law is analyzed to be always nonsingular. Thus, the GNFTSMC-based speed controller for the PMSM speed tracking system is developed. Finally, simulations are conducted for the proposed controller and other terminal sliding mode controllers. The results show that compared to the other controllers, the PMSM system based on GNFTSMC displays improved performance characteristics of faster speed response, smaller chattering and higher current efficiency.

© 2020 Institute of Electrical and Electronics Engineers Inc.. All rights reserved.

Number of references:42

Main heading:Electric machine control

Controlled terms:Control theory - Controllers - Permanent magnets - Sliding mode control - Speed - Synchronous motors

Uncontrolled terms:Closed control loop - Current efficiency - Performance characteristics - Permanent Magnet Synchronous Motor - Piecewise-continuous - Terminal sliding mode - Terminal sliding mode control - Time-dependent functions

Classification code:704.1 Electric Components - 705.3.1 AC Motors - 731.1 Control Systems - 731.2 Control System Applications - 732.1 Control Equipment

DOI:10.1109/ACCESS.2020.3030279

Funding details: Number: GQRC-19-19, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported by the High-Tech Innovation Fund, Chinese Academy of Sciences, under Grant GQRC-19-19.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20202108697744

Title:Non-linear calibration optimisation based on the Levenberg–Marquardt algorithm

Authors:Hu, Guoliang (1, 2); Zhou, Zuofeng (1); Cao, Jianzhong (1); Huang, Huimin (1, 2)

Author affiliation:(1) Aircraft Optical Imaging and Measurement Technology Laboratory, Xi'an Institute of Optics and Precision Mechanics of CAS, Xinxi Road No. 17, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Zhou, Zuofeng(zfzhou@opt.ac.cn)

Source title:IET Image Processing

Abbreviated source title:IET Image Proc.

Volume:14

Issue:7

Issue date:May 29, 2020

Publication year:2020

Pages:1402-1414

Language:English

ISSN:17519659

Document type:Journal article (JA)

Publisher:Institution of Engineering and Technology, United States

Abstract:An outstanding calibration algorithm is the most important factor that affects the precision of attitude measurement. This study proposes a non-linear optimisation algorithm to refine the solutions of the initial guess obtained using the Zhang's technique, the Bouget's technique, or the Hartley's algorithm. Large sets of point correspondences were adopted to test the validity of the proposed method. Extensive practical experiments demonstrated that the proposed method can significantly improve the accuracy of calibration and ultimately obtains higher measurement precision. The error of the reprojection in the proposed method was <0.13 px. At a range of 1 m, the error rate was 0.5% for the length test and about 3% for the angle test. This study proposes a new method to calibrate the relationship between laser radar and the camera. Binocular vision was used to reconstruct the point cloud of the non-cooperative target. At the same time, data was also obtained using laser radar. Finally, the two groups of systems were fused. Accurate and dense three-dimensional information of the target was obtained. It could not only obtain the dense pose information of the target surface but also the texture and colour feature information of the target surface.

© The Institution of Engineering and Technology 2020.

Number of references:29

Main heading:Calibration

Controlled terms:Binocular vision - Nonlinear programming - Optical radar - Textures

Uncontrolled terms:Attitude measurement - Calibration algorithm - Measurement precision - Non-cooperative target - Non-linear optimisation - Nonlinear calibration - Point correspondence - Three-dimensional information

Classification code:741.2 Vision - 741.3 Optical Devices and Systems

Numerical data indexing:Percentage 3.00e+00%, Percentage 5.00e-01%, Size 1.00e+00m

DOI:10.1049/iet-ipr.2019.1489

Funding details: Number: 2020ZDLGY04-03, Acronym: -, Sponsor: -;

Funding text:The authors thank Yuefeng Niu, Qingquan Wu, Liqiang Liu, and Weiwei Duan for their helpful suggestions, which have improved the clarity of this paper. This work was supported by Shaanxi Key Industry Innovation Chain Project [Grant no. 2020ZDLGY04-03].

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204509445393

Title:Property-Constrained Dual Learning for Video Summarization

Authors:Zhao, Bin (1); Li, Xuelong (1); Lu, Xiaoqiang (2)

Author affiliation:(1) School of Computer Science, Center for OPTical Imagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China; (2) Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:31

Issue:10

Issue date:October 2020

Publication year:2020

Pages:3989-4000

Article number:8924889

Language:English

ISSN:2162237X

E-ISSN:21622388

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:Video summarization is the technique to condense large-scale videos into summaries composed of key-frames or key-shots so that the viewers can browse the video content efficiently. Recently, supervised approaches have achieved great success by taking advantages of recurrent neural networks (RNNs). Most of them focus on generating summaries by maximizing the overlap between the generated summary and the ground truth. However, they neglect the most critical principle, i.e., whether the viewer can infer the original video content from the summary. As a result, existing approaches cannot preserve the summary quality well and usually demand large amounts of training data to reduce overfitting. In our view, video summarization has two tasks, i.e., generating summaries from videos and inferring the original content from summaries. Motivated by this, we propose a dual learning framework by integrating the summary generation (primal task) and video reconstruction (dual task) together, which targets to reward the summary generator under the assistance of the video reconstructor. Moreover, to provide more guidance to the summary generator, two property models are developed to measure the representativeness and diversity of the generated summary. Practically, experiments on four popular data sets (SumMe, TVsum, OVP, and YouTube) have demonstrated that our approach, with compact RNNs as the summary generator, using less training data, and even in the unsupervised setting, can get comparable performance with those supervised ones adopting more complex summary generators and trained on more annotated data.

© 2012 IEEE.

Number of references:53

Main heading:Image reconstruction

Controlled terms:Recurrent neural networks - Video recording

Uncontrolled terms:Learning frameworks - Original video content - Property models - Recurrent neural network (RNNs) - Summary generation - Video contents - Video reconstruction - Video summarization

Classification code:716.4 Television Systems and Equipment

DOI:10.1109/TNNLS.2019.2951680

Funding details: Number: 2017YFB0502900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: QYZDY-SSW-JSC044,QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B15, Acronym: -, Sponsor: -;Number: 61702498,61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received January 27, 2019; revised July 4, 2019 and October 1, 2019; accepted November 2, 2019. Date of publication December 5, 2019; date of current version October 6, 2020. This work was supported in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61702498, in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS), under Grant QYZDY-SSW-JSC044, in part by the Young Top-notch Talent Program of CAS under Grant QYZDB-SSW-JSC015, in part by the National Key Research and Development Program of China under Grant 2017YFB0502900, and in part by the CAS Light of West China Program under Grant XAB2017B15. (Corresponding author: Xiaoqiang Lu.) B. Zhao and X. Li are with the School of Computer Science and the Center for OPTical Imagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi’an 710072, China (e-mail: binzhao111@gmail.com; xuelong_li@nwpu.edu.cn).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204109337590

Title:Improved RT-MDNet for panoramic video target tracking

Title of translation:一种基于改进RT-MDNet的全景视频目标跟踪算法

Authors:Wang, Dianwei (1); Fang, Haoyu (1); Liu, Ying (1); Wu, Shiqian (2); Xie, Yongjun (3); Song, Haijun (3)

Author affiliation:(1) School of Communications and Information Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) School of Information Science and Engineering, Wuhan University of Science and Technology, Wuhan; 430081, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Fang, Haoyu(fanghaoyu54057@163.com)

Source title:Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology

Abbreviated source title:Harbin Gongye Daxue Xuebao

Volume:52

Issue:10

Issue date:October 30, 2020

Publication year:2020

Pages:152-160

Language:Chinese

ISSN:03676234

CODEN:HPKYAY

Document type:Journal article (JA)

Publisher:Harbin Institute of Technology

Abstract:In the process of panoramic video target tracking, the target deformation and scale changes caused by light change, interference of similar background, and object moving may result in target drift or missing, leading to low success rate and poor robustness. To address these issues, a target tracking method based on long short-term memory (LSTM) network and improved Real-Time MDNet (RT-MDNet) network was proposed. First, shallow convolution neural network was utilized to extract features, and adaptive RoIAlign was adopted to reduce pixel loss in the convolution process. Then, the weight of the last layer of the full connection layers was updated online by utilizing the target features to achieve foreground background separation and extract the target area. Lastly, the scale of the target box was selected adaptively by means of LSTM, and the target position information was thus obtained. Experimental results show that monocular vision algorithm could hardly adapt to the scale change and background change when applied in panoramic dataset, while the proposed method that utilizes 3-layer LSTM network to construct scale prediction module could effectively solve these problems. The algorithm can efficiently deal with the situations of small target, target occlusion, and cross motion of multiple targets in target tracking while maintaining accuracy, achieving better visual effect and higher overlap rate score.

Copyright ©2020 Journal of Harbin Institute of Technology.All rights reserved.

Number of references:19

Main heading:Target tracking

Controlled terms:Clutter (information theory) - Convolution - Long short-term memory - Motion tracking - Object tracking

Uncontrolled terms:Background separation - Convolution neural network - Monocular vision - Multiple targets - Panoramic video - Scale prediction - Target feature - Target position

Classification code:716.1 Information Theory and Signal Processing

DOI:10.11918/201910175

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202808913774

Title:Research on a Method of Two Aircraft Intersection Measurement Based on INS/ CNS Integrated Navigation

Authors:Meilin, Xie (1, 4); Yu, Cao (1, 2, 3, 4); Wei, Hao (1, 4); Wei, Huang (1, 4); Xuezheng, Lian (1, 4); Kai, Liu (1, 4); Feng, Jing (1, 3, 4); Peng, Liu (1, 3, 4); Xubin, Feng (1, 3, 4)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China

Source title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Abbreviated source title:IEEE Int. Conf. Electron. Technol., ICET

Part number:1 of 1

Issue title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Issue date:May 2020

Publication year:2020

Pages:793-798

Article number:9119573

Language:English

ISBN-13:9781728162836

Document type:Conference article (CA)

Conference name:3rd IEEE International Conference on Electronics Technology, ICET 2020

Conference date:May 8, 2020 - May 12, 2020

Conference location:Chengdu, China

Conference code:161271

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:The target position accuracy of the two aircraft intersection position system depends heavily on the position and attitude measurement accuracy of the platform. For this reason, this paper proposes the INS/ CNS integrated navigation method based on the stable platform of star seeking for the intersection measurement environment of airborne photoelectric platform, which is used to obtain the attitude and position reference of UAV platform accurately and in real time, finally improve the target position accuracy of the intersection measurement of two UAVs[3].

© 2020 IEEE.

Number of references:7

Main heading:Air navigation

Controlled terms:Aircraft - Inertial navigation systems

Uncontrolled terms:Attitude measurement - Integrated navigation - Intersection measurement - Photo-electric platform - Position systems - Stable platform - Target position - UAV platform

Classification code:431.5 Air Navigation and Traffic Control - 652.1 Aircraft, General

DOI:10.1109/ICET49382.2020.9119573

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204609484429

Title:Novel Band-Edge Work Function Performance Modulation via NPT with PMOS1st/NMOS1stLaminated Stack for PMOS Low Power Target????(Open Access)

Authors:Yao, Jiaxin (1, 2); Yin, Huaxiang (1); Wu, Zhenhua (1); Tian, Jinshou (2)

Author affiliation:(1) Key Laboratory of Microelectronics Devices and Integrated Technology, Institute of Microelectronics of Chinese Academy of Sciences, Beijing; 100029, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Source title:ECS Journal of Solid State Science and Technology

Abbreviated source title:ECS J. Solid State Sci. Technol.

Volume:9

Issue:10

Issue date:October 2020

Publication year:2020

Article number:103004

Language:English

ISSN:21628769

E-ISSN:21628777

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:In this paper, the band-edge work function performance is systematically investigated and modulated via novel nitrogen plasma treatment (NPT) with the advanced PMOS1st (TiN/TiN/TiAlC) and NMOS1st (TiN/TiN) laminated stacks for the fabricated PMOS capacitors. The basic multi-VT performance is strongly modulated by controlling NPT process. 1) Flatband voltage (VFB) shifts towards band edge are obtained as +120 mV (undiluted), +430 mV (diluted) for PMOS1st and +80 mV (undiluted), +210 mV (diluted) for NMOS1st. 2) By manipulating the NPT process from undiluted and diluted case, it can provide significant high band-edge effective work function ranging from 4.89 eV (undiluted) to 5.21 eV (diluted) for PMOS1st and 5.22 eV (undiluted) to 5.35 eV (diluted) for NMOS1st laminated stack, respectively. 3) NPT diluted with hydrogen is observed to maintain ultralow bulk trap density (1.11 1011 cm-2 for PMOS1st and nearly zero for NMOS1st) and interface trap density (3.34 1011 eV-1 cm-2 for PMOS1st and 6.45 1011 eV-1 cm-2 for NMOS1st). The significant band-edge work function modulation and very low bulk and interface trap density demonstrate the novel NPT with PMOS1st/NMOS1st laminated stack is very promising to achieve the target of PMOS low-power application in the further technology node.

© 2020 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.

Number of references:23

Main heading:Work function

Controlled terms:Laminating - Modulation - Nitrogen plasma - Plasma applications - Titanium nitride

Uncontrolled terms:Effective work function - Flat-band voltage - Interface trap density - Low power application - Nitrogen plasma treatment - pMOS capacitor - Technology nodes - Work function modulation

Classification code:804.2 Inorganic Compounds - 816.1 Processing of Plastics and Other Polymers - 931.3 Atomic and Molecular Physics - 932.3 Plasma Physics

Numerical data indexing:Electron_Volt 4.89e+00eV, Electron_Volt 5.21e+00eV, Electron_Volt 5.22e+00eV, Electron_Volt 5.35e+00eV

DOI:10.1149/2162-8777/abc45f

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20202208742435

Title:Application of Deep Neural Network in Quantitative Analysis of VOCs by Infrared Spectroscopy

Title of translation:深度神经网络在红外光谱定量分析VOCs中的应用

Authors:Zhang, Qiang (1, 2); Wei, Ru-Yi (1); Yan, Qiang-Qiang (1); Zhao, Yu-Di (1); Zhang, Xue-Min (1); Yu, Tao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Wei, Ru-Yi(ruyiwei@opt.ac.cn)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:40

Issue:4

Issue date:April 1, 2020

Publication year:2020

Pages:1099-1106

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press

Abstract:In view of the fact that shallow artificial neural networks (ANNs) rely on prior knowledge for artificial extraction of features, while shallower network structures limit the ability of neural networks to learn complex nonlinear relationships, this paper applies deep neural networks (DNN) to the study of inversion of multi-component volatile organic compounds (VOCs) by leaf-transformed infrared spectroscopy (FTIR), and the effectiveness of the algorithm was verified by simulation experiments. Eight VOCs including benzene, toluene, 1, 3-butadiene, ethylbenzene, styrene, o-xylene, m-xylene, and p-xylene were selected from the US Environmental Protection Agency (EPA) database. In the wavelength range of 8~12 μm, each gas has four different concentration lines, and the absorbance spectrum at one concentration is selected from each VOCs gas according to Beer-Lambert's law to obtain 65 536 different kinds. Samples of VOCs mixed gas absorbance spectra. The absorbance spectra of 5 000 groups of mixed gases were randomly selected, of which 4 000 were used as training samples and 1000 were used as prediction samples. The dimensional reduction of the spectral matrix was performed by integral extraction and principal component extraction, and the spectral dimension was reduced from 3457 to 30 dimensions. The new matrix obtained by preprocessing the spectral matrix was used as the network input, and the concentration matrix of the eight VOCs was used as the output. A deep neural network regression prediction model of 30-25-15-10-8 was established, and multiple groups were realized by using spectral data. Inversion of VOCs concentration, the root mean square error of the sample obtained by inversion was 0.002 7×10-6, which was obvious compared with the accuracy of previous methods using nonlinear partial least squares fitting and artificial neural network. improve. The root mean square error of each VOCs gas does not exceed 0.005×10-6, and the root mean square error of each sample does not exceed 0.006×10-6, which proves that the deep neural network prediction model has good nonlinear fitting ability. And good stability. When the training sample is insufficient (typical value: less than 500), the deep neural network cannot fully learn, the network error is larger, and the accuracy is lower than that of the single hidden layer artificial neural network, but as the number of training samples increases, the deep neural network accuracy is continuously improved. When the number of training samples is sufficient, the deep neural network has stronger nonlinear relation learning ability than the shallow artificial neural network, and the prediction accuracy is higher and the model is more stable. At the same time, due to the dimensionality reduction of the spectral matrix before training, the complexity of the algorithm is greatly reduced, and the inversion efficiency is effectively improved. The analysis shows that the deep neural network prediction model has good nonlinear fitting ability and good stability. It can fully learn the data features without manual extraction of features, and at the same time, the concentration inversion of multi-component VOCs can achieve higher precision.

© 2020, Peking University Press. All right reserved.

Number of references:11

Main heading:Deep neural networks

Controlled terms:Complex networks - Computational complexity - Data mining - Dimensionality reduction - Environmental Protection Agency - Errors - Extraction - Forecasting - Fourier transform infrared spectroscopy - Gases - Least squares approximations - Matrix algebra - Mean square error - Multilayer neural networks - Network layers - Predictive analytics - Sampling - Spectrum analysis - Styrene - Volatile organic compounds - Xylene

Uncontrolled terms:Dimensional reduction - Neural network prediction model - Non-linear relationships - Partial least square (PLS) - Principal component extraction - Regression predictions - Root mean square errors - US Environmental Protection Agency

Classification code:454.2 Environmental Impact and Protection - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 801 Chemistry - 802.3 Chemical Operations - 804.1 Organic Compounds - 921.1 Algebra - 921.6 Numerical Methods - 922.2 Mathematical Statistics

Numerical data indexing:Size 8.00e-06m to 1.20e-05m

DOI:10.3964/j.issn.1000-0593(2020)04-1099-08

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203809198874

Title:Prediction of end-of-season tuber yield and tuber set in potatoes using in-season uav-based hyperspectral imagery and machine learning????(Open Access)

Authors:Sun, Chen (1, 2); Feng, Luwei (1); Zhang, Zhou (1); Ma, Yuchi (1); Crosby, Trevor (3); Naber, Mack (3); Wang, Yi (3)

Author affiliation:(1) Biological Systems Engineering, University of Wisconsin–Madison, Madison; WI; 53706, United States; (2) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China; (3) Horticulture, University of Wisconsin-Madison, Madison; WI; 53706, United States

Corresponding author:Zhang, Zhou(zzhang347@wisc.edu)

Source title:Sensors (Switzerland)

Abbreviated source title:Sensors

Volume:20

Issue:18

Issue date:September 2, 2020

Publication year:2020

Pages:1-13

Article number:5293

Language:English

ISSN:14248220

Document type:Journal article (JA)

Publisher:MDPI AG, Postfach, Basel, CH-4005, Switzerland

Abstract:Potato is the largest non-cereal food crop in the world. Timely estimation of end-of-season tuber production using in-season information can inform sustainable agricultural management decisions that increase productivity while reducing impacts on the environment. Recently, unmanned aerial vehicles (UAVs) have become increasingly popular in precision agriculture due to their flexibility in data acquisition and improved spatial and spectral resolutions. In addition, compared with natural color and multispectral imagery, hyperspectral data can provide higher spectral fidelity which is important for modelling crop traits. In this study, we conducted end-of-season potato tuber yield and tuber set predictions using in-season UAV-based hyperspectral images and machine learning. Specifically, six mainstream machine learning models, i.e., ordinary least square (OLS), ridge regression, partial least square regression (PLSR), support vector regression (SVR), random forest (RF), and adaptive boosting (AdaBoost), were developed and compared across potato research plots with different irrigation rates at the University of Wisconsin Hancock Agricultural Research Station. Our results showed that the tuber set could be better predicted than the tuber yield, and using the multi-temporal hyperspectral data improved the model performance. Ridge achieved the best performance for predicting tuber yield (R2 = 0.63) while Ridge and PLSR had similar performance for predicting tuber set (R2 = 0.69). Our study demonstrated that hyperspectral imagery and machine learning have good potential to help potato growers efficiently manage their irrigation practices.

© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Number of references:46

Main heading:Tubes (components)

Controlled terms:Adaptive boosting - Agricultural robots - Antennas - Crops - Data acquisition - Decision trees - Forecasting - Irrigation - Machine learning - Predictive analytics - Remote sensing - Spectroscopy - Support vector regression - Unmanned aerial vehicles (UAV)

Uncontrolled terms:Hyper-spectral imageries - Machine learning models - Multi-spectral imagery - Ordinary least squares - Partial least square regression - Support vector regression (SVR) - Sustainable agricultural - University of Wisconsin

Classification code:619.1 Pipe, Piping and Pipelines - 652.1 Aircraft, General - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 821.3 Agricultural Methods - 821.4 Agricultural Products - 961 Systems Science

DOI:10.3390/s20185293

Funding details: Number: WIS03026, Acronym: USDA, Sponsor: U.S. Department of Agriculture;Number: -, Acronym: NIFA, Sponsor: National Institute of Food and Agriculture;Number: 201904910357, Acronym: CSC, Sponsor: China Scholarship Council;

Funding text:Funding: This research was supported by the National Institute of Food and Agriculture, United States Department of Agriculture, under ID number WIS03026.Acknowledgments: This work was partially supported by the China Scholarship Council (NO.201904910357). The agronomic work of this study was supported by the Wisconsin Potato and Vegetable Growers Association.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

Accession number:20203509099830

Title:A data encryption and fast transmission algorithm based on surveillance video????(Open Access)

Authors:Qiu, Shi (1); Cui, Ying (2); Meng, Xianjia (3)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) College of Equipment Management and Support, Engineering University of PAP, Xi'an; 710086, China; (3) School of Information Science and Technology, Northwest University, Xi'an; 710027, China

Corresponding author:Cui, Ying(cuiying_1224@163.comemailxianjiam@nwu.edu.cn)Meng, XianJia(xianjiam@nwu.edu.cn)

Source title:Wireless Communications and Mobile Computing

Abbreviated source title:Wireless Commun. Mobile Comput.

Volume:2020

Issue date:2020

Publication year:2020

Article number:8842412

Language:English

ISSN:15308669

E-ISSN:15308677

Document type:Journal article (JA)

Publisher:Hindawi Limited, 410 Park Avenue, 15th Floor, 287 pmb, New York, NY 10022, United States

Abstract:Video surveillance is an effective way to record current events. In view of the difficulty of efficient transmission of massive surveillance video and the risk of leakage in the transmission process, a new data encryption and fast transmission algorithm is proposed in this paper. From the perspective of events, the constraints of time and space dimension is broken. First, a background and moving object extraction model is built based on video composition. Then, a strong correlation data encryption and fast transmission model is constructed to achieve efficient data compression. Finally, a data mapping mechanism is established to realize the decoding of surveillance video. Our experimental results show that the compression ratio of the proposed algorithm is more than 60% under the premise of image confidentiality.

© 2020 Shi Qiu et al.

Number of references:31

Main heading:Cryptography

Controlled terms:Monitoring - Security systems - Transmissions

Uncontrolled terms:Data encryption - Fast transmissions - Moving object extraction - Space dimensions - Strong correlation - Surveillance video - Video composition - Video surveillance

Classification code:602.2 Mechanical Transmissions - 914.1 Accidents and Accident Prevention

Numerical data indexing:Percentage 6.00e+01%

DOI:10.1155/2020/8842412

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20200508103000

Title:Attention Mask R-CNN for ship detection and segmentation from remote sensing images????(Open Access)

Authors:Nie, Xuan (1); Duan, Mengyang (1); Ding, Haoxuan (2); Hu, Bingliang (3); Wong, Edward K. (4)

Author affiliation:(1) School of Software, Northwestern Polytechnical University, Xi'an; 710072, China; (2) School of Power and Energy, Northwestern Polytechnical University, Xi'an; 710072, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) NYU Tandon School of Engineering, Brooklyn; NY; 11201, United States

Corresponding author:Nie, Xuan(xnie@nwpu.edu.cn)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:9325-9334

Article number:8951182

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:In recent years, ship detection in satellite remote sensing images has become an important research topic. Most existing methods detect ships by using a rectangular bounding box but do not perform segmentation down to the pixel level. This paper proposes a ship detection and segmentation method based on an improved Mask R-CNN model. Our proposed method can accurately detect and segment ships at the pixel level. By adding a bottom-up structure to the FPN structure of Mask R-CNN, the path between the lower layers and the topmost layer is shortened, allowing the lower layer features to be more effectively utilized at the top layer. In the bottom-up structure, we use channel-wise attention to assign weights in each channel and use the spatial attention mechanism to assign a corresponding weight at each pixel in the feature maps. This allows the feature maps to respond better to the target's features. Using our method, the detection and segmentation mAPs increased from 70.6% and 62.0% to 76.1% and 65.8%, respectively.

© 2013 IEEE.

Number of references:47

Main heading:Image segmentation

Controlled terms:Computer vision - Convolutional neural networks - Object detection - Pixels - Remote sensing - Ships

Uncontrolled terms:Corresponding weights - Object segmentation - Remote sensing images - Research topics - Satellite remote sensing - Segmentation map - Segmentation methods - Spatial attention

Classification code:723.2 Data Processing and Image Processing - 723.5 Computer Applications

Numerical data indexing:Percentage 6.20e+01% to 7.61e+01%, Percentage 6.58e+01%, Percentage 7.06e+01%

DOI:10.1109/ACCESS.2020.2964540

Funding details: Number: LSIT201706D, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: Science and Technology Innovation as a Whole Plan Projects of Shaanxi Province;Number: 2018ZDXM-GY-108, Acronym: -, Sponsor: Key Science and Technology Program of Shaanxi Province;

Funding text:This work was supported in part by the 2018 Science and Technology Plan of Shaanxi Province under Project 2018ZDXM-GY-108, and in part by the Open-End Funds of Key Laboratory of Spectral Imaging Technology, CAS, under Project LSIT201706D.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20203008969333

Title:An Obstacle Avoidance Algorithm for Manipulators Based on Six-Order Polynomial Trajectory Planning????(Open Access)

Title of translation:一种基于六次多项式轨迹规划的机械臂避障算法????(Open Access)

Authors:Ma, Yuhao (1, 2); Liang, Yanbing (1)

Author affiliation:(1) Laboratory of Precision Physical Quantity Measurement, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University

Abbreviated source title:Xibei Gongye Daxue Xuebao

Volume:38

Issue:2

Issue date:April 1, 2020

Publication year:2020

Pages:392-400

Language:Chinese

ISSN:10002758

CODEN:XGDUE2

Document type:Journal article (JA)

Publisher:Northwestern Polytechnical University

Abstract:Aiming at a series of requirements of obstacle avoidance trajectory planning of manipulators, a new algorithm based on six-order polynomial trajectory planning is proposed. Firstly, the six-order polynomial is used for the trajectory planning of the manipulator. Assuming that the coefficients of the sixth order term in the curve equation are undetermined parameters, by adjusting these parameters, the shape of the curve can be changed to make manipulators avoid the obstacle and to optimize performance indicators of the trajectory simultaneously. Thus, the obstacle avoidance trajectory planning of manipulators is transformed into a multi-objective optimization problem. Secondly, combining collision detection results and kinematics indexes, a fitness function is defined by the weighting coefficient method. At last, an ideal collision-free trajectory that is collaborative optimized in kinematics, trajectory length and rotation angle is planned in the joint space through genetic algorithm optimization. Additionally, the algorithm is validated by simulation experiments with MATLAB, the results show that the method of this study can effectively plan obstacle-free trajectories satisfying the performance requirements of the manipulator.

© 2020 Journal of Northwestern Polytechnical University.

Number of references:15

Main heading:Robot programming

Controlled terms:Collision avoidance - Curve fitting - Genetic algorithms - Kinematics - Manipulators - MATLAB - Multiobjective optimization - Polynomials - Trajectories

Uncontrolled terms:Collision detection - Collision-free trajectory - Genetic-algorithm optimizations - Multi-objective optimization problem - Obstacle avoidance algorithms - Performance indicators - Performance requirements - Weighting coefficient methods

Classification code:723.1 Computer Programming - 914.1 Accidents and Accident Prevention - 921 Mathematics - 931.1 Mechanics

DOI:10.1051/jnwpu/20203820392

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20203709158815

Title:Siamese dilated inception hashing with intra-group correlation enhancement for image retrieval

Authors:Lu, Xiaoqiang (1); Chen, Yaxiong (1); Li, Xuelong (2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Computer Science, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:31

Issue:8

Issue date:August 2020

Publication year:2020

Pages:3032-3046

Article number:8833507

Language:English

ISSN:2162237X

E-ISSN:21622388

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:For large-scale image retrieval, hashing has been extensively explored in approximate nearest neighbor search methods due to its low storage and high computational efficiency. With the development of deep learning, deep hashing methods have made great progress in image retrieval. Most existing deep hashing methods cannot fully consider the intra-group correlation of hash codes, which leads to the correlation decrease problem of similar hash codes and ultimately affects the retrieval results. In this article, we propose an end-to-end siamese dilated inception hashing (SDIH) method that takes full advantage of multi-scale contextual information and category-level semantics to enhance the intra-group correlation of hash codes for hash codes learning. First, a novel siamese inception dilated network architecture is presented to generate hash codes with the intra-group correlation enhancement by exploiting multi-scale contextual information and category-level semantics simultaneously. Second, we propose a new regularized term, which can force the continuous values to approximate discrete values in hash codes learning and eventually reduces the discrepancy between the Hamming distance and the Euclidean distance. Finally, experimental results in five public data sets demonstrate that SDIH can outperform other state-of-the-art hashing algorithms.

© 2012 IEEE.

Number of references:68

Main heading:Image enhancement

Controlled terms:Codes (symbols) - Computational efficiency - Deep learning - Digital storage - Hamming distance - Hash functions - Image retrieval - Learning systems - Nearest neighbor search - Network architecture - Semantics

Uncontrolled terms:Contextual information - Continuous value - Discrete values - Euclidean distance - Hashing algorithms - Hashing method - Public data - State of the art

Classification code:722.1 Data Storage, Equipment and Techniques - 723.2 Data Processing and Image Processing - 921.5 Optimization Techniques

DOI:10.1109/TNNLS.2019.2935118

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: QYZDY-SSW-JSC044, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B15, Acronym: -, Sponsor: -;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received October 21, 2018; revised March 24, 2019, June 18, 2019, and July 12, 2019; accepted August 2, 2019. Date of publication September 11, 2019; date of current version August 4, 2020. This work was supported in part by the National Natural Science Foundation of China under Grant 61772510 and Grant 61702498, in part by the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS), under Grant QYZDY-SSW-JSC044, in part by the Young Top-notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015, in part by the National Key R&D Program of China under Grant 2017YFB0502900, and in part by the CAS Light of West China Program under Grant XAB2017B15. (Corresponding author: Xiaoqiang Lu.) X. Lu is with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China (e-mail: luxq666666@gmail.com).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204209348224

Title:Deep Learning Target Tracking Algorithm Based on Construction Site Scene

Title of translation:基于工地场景的深度学习目标跟踪算法

Authors:Ma, Shao-Xiong (1, 2); Qiu, Shi (3); Tang, Ying (4); Zhang, Xiao (5)

Author affiliation:(1) Xi'an University of Technology, Xi'an; Shaanxi; 710048, China; (2) Shaanxi Railway Institute, Weinan; Shaanxi; 714000, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (4) Chengdu University of Technology, Chengdu; Sichuan; 610059, China; (5) Northwest University, Xi'an; Shaanxi; 710127, China

Corresponding author:Qiu, Shi(qiushi215@163.com)

Source title:Tien Tzu Hsueh Pao/Acta Electronica Sinica

Abbreviated source title:Tien Tzu Hsueh Pao

Volume:48

Issue:9

Issue date:September 1, 2020

Publication year:2020

Pages:1665-1671

Language:Chinese

ISSN:03722112

CODEN:TTHPAG

Document type:Journal article (JA)

Publisher:Chinese Institute of Electronics

Abstract:Construction site is difficult to be effectively managed owing to its complex environment. A deep learning target tracking algorithm based on construction site scene is proposed to assist the construction progress. Firstly, according to the continuity of the target in the site scene, the enhanced group tracker is constructed to improve the successful probability of target tracking. Then, the depth detector is constructed with sliding window, stacked denoising auto encoder (SDAE) and support vector machine (SVM). Sliding window: a model is built from the gradient angle to realize window adaption. SDAE algorithm: the reverse algorithm is built to fine-tune network parameters. Optimized SVM algorithm reduces the probability of target drift and tracking failure. Finally, high precision tracking is achieved. Experiments show that the proposed algorithm can track the target effectively and realize dynamic management.

© 2020, Chinese Institute of Electronics. All right reserved.

Number of references:31

Main heading:Target tracking

Controlled terms:Clutter (information theory) - Deep learning - Learning algorithms - Support vector machines

Uncontrolled terms:Complex environments - Construction progress - Construction sites - Dynamic management - High precision tracking - Network parameters - Target tracking algorithm - Tracking failure

Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications

DOI:10.3969/j.issn.0372-2112.2020.09.001

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201708534628

Title:Fully noncontact measurement of inner cracks in thick specimen with fiber-phased-array laser ultrasonic technique

Authors:Pei, Cuixiang (1, 2); Yi, Dongchi (1, 3); Liu, Tianhao (1); Kou, Xing (1); Chen, Zhenmao (1)

Author affiliation:(1) Shanxi Engineering Research Center of NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an; 710049, China; (2) State Key Lab of Digital Manufacturing Equipment & Tecnology, Wuhan; 430074, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China

Corresponding author:Pei, Cuixiang(pei.cx@mail.xjtu.edu.cn)

Source title:NDT and E International

Abbreviated source title:NDT E Int

Volume:113

Issue date:July 2020

Publication year:2020

Article number:102273

Language:English

ISSN:09638695

CODEN:NDTIEH

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:To realize a fully noncontact ultrasonic testing method for inner cracks inspection in thick metal specimen, a phased array laser ultrasonic testing system with using a compact optic fiber array bundle and a laser interferometer is developed in this study. The focusing and steering of the shear wave and longitudinal wave generated with seven fiber-phased-array laser sources in thermoelastic regime is investigated by a numerical simulation and validated by the experiment. A non-contact measurement of the inner-surface cracks by both the angle-beam testing method and time-of-flight diffraction method with the fiber-phased-array laser ultrasonic technique have been studied.

© 2020 Elsevier Ltd

Number of references:17

Main heading:Ultrasonic testing

Controlled terms:Fibers - Interferometers - Laser interferometry - Shear flow - Shear waves - Testing

Uncontrolled terms:Laser interferometer - Laser ultrasonic techniques - Longitudinal waves - Noncontact measurements - Testing systems - Thermo-elastic regimes - Time of flight diffraction methods - Ultrasonic testing method

Classification code:631.1 Fluid Flow, General - 753.3 Ultrasonic Applications - 931.1 Mechanics - 941.3 Optical Instruments - 941.4 Optical Variables Measurements

DOI:10.1016/j.ndteint.2020.102273

Funding details: Number: 11502192, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: DMETKF2018012, Acronym: -, Sponsor: State Key Lab of Digital Manufacturing Equipment and Technology;

Funding text:The authors would like to thank the National Natural Science Foundation (No. 11502192) and the State Key Lab of Digital Manufacturing Equipment & Tecnology (No. DMETKF2018012) for funding.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201008273153

Title:Sound Active Attention Framework for Remote Sensing Image Captioning

Authors:Lu, Xiaoqiang (1); Wang, Binqiang (1, 2); Zheng, Xiangtao (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:3

Issue date:March 2020

Publication year:2020

Pages:1985-2000

Article number:8931249

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:Attention mechanism-based image captioning methods have achieved good results in the remote sensing field, but are driven by tagged sentences, which is called passive attention. However, different observers may give different levels of attention to the same image. The attention of observers during testing, then, may not be consistent with the attention during training. As a direct and natural human-machine interaction, speech is much faster than typing sentences. Sound can represent the attention of different observers. This is called active attention. Active attention can be more targeted to describe the image; for example, in disaster assessments, the situation can be obtained quickly and the corresponding disaster areas can be located related to the specific disaster. A novel sound active attention framework is proposed for more specific caption generation according to the interest of the observer. First, sound is modeled by mel-frequency cepstral coefficients (MFCCs) and the image is encoded by convolutional neural networks (CNNs). Then, to handle the continuity characteristic of sound, a sound module and an attention module are designed based on the gated recurrent units (GRUs). Finally, the sound-guided image feature processed by the attention module is imported into the output module to generate descriptive sentence. Experiments based on both fake and real sound data sets show that the proposed method can generate sentences that can capture the focus of human.

© 1980-2012 IEEE.

Number of references:59

Main heading:Remote sensing

Controlled terms:Convolutional neural networks - Disasters - Recurrent neural networks - Semantics

Uncontrolled terms:Active attention - Attention mechanisms - Disaster areas - Human machine interaction - Image captioning - Mel-frequency cepstral coefficients - Remote sensing images - Semantic understanding

DOI:10.1109/TGRS.2019.2951636

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: XAB2017B26, Acronym: -, Sponsor: -;Number: QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received March 20, 2019; revised May 16, 2019 and September 11, 2019; accepted October 20, 2019. Date of publication December 11, 2019; date of current version February 26, 2020. This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFB0502900; in part by the National Natural Science Foundation of China under Grant 61806193, Grant 61702498, and Grant 61772510; in part by the Young Top-Notch Talent Program of the Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015; in part by the Open Research Fund of the State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, under Grant SKLST2017010; in part by the CAS "Light of West China" Program under Grant XAB2017B26 and Grant XAB2017B15; and in part by the Xi’an Postdoctoral Innovation Base Scientific Research Project. (Corresponding author: Xiaoqiang Lu.) X. Lu and X. Zheng are with the Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China (e-mail: luxq666666@gmail.com).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909589258

Title:Spatial heterodyne spectroscopy for long-wave infrared: Optical design and laboratory performance

Authors:Han, Bin (1, 2); Feng, Yutao (1); Zhang, Zhaohui (1); Bai, Qinglan (1); Wu, Junqiang (1); Wu, Yang (1, 2); Chang, Chenguang (1); Sun, Jian (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100190, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11566

Part number:1 of 1

Issue title:AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics

Issue date:2020

Publication year:2020

Article number:115660Q

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639539

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Spectroscopy and Imaging; and Biomedical Optics, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165073

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Spatial heterodyne spectroscopy for long-wave infrared identifies an ozone line near 1133 cm-1(about 8.8 μm) as a suitable target line, the Doppler shifts of which are used to retrieve stratosphere wind and ozone concentration. The basic principle of Spatial Heterodyne Spectroscopy (SHS) is elaborated. Theoretical analyses for the optical parameters of spatial heterodyne spectroscopy are deduced. The optical system is designed to work at 160 K and to maximize the field of view (FOV). The optical design and simulation is carried on to fulfill the requirement. The principle prototype was built and a frequency-stable laser was used to conduct the experiment. Result shows that the designed interferometer can meet the requirement of spectral resolution (0.1 cm-1) and that the spatial frequency of fringe pattern is consistent with the theoretical value at normal temperature and pressure.

© 2020 SPIE. All rights reserved.

Number of references:10

Main heading:Optical heterodyning

Controlled terms:Infrared devices - Infrared radiation - Optical design - Optical systems - Ozone - Solar buildings - Spectrometers - Spectroscopy

Uncontrolled terms:Design and simulation - Laboratory performance - Long wave infrared - Normal temperature and pressures - Ozone concentration - Spatial frequency - Spatial heterodyne spectroscopies - Theoretical values

Classification code:402 Buildings and Towers - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804 Chemical Products Generally

Numerical data indexing:Size 8.80e-06m, Temperature 1.60e+02K

DOI:10.1117/12.2580379

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909589274

Title:An anomaly detection algorithm for hyperspectral imagery based on graph laplacian

Authors:Gan, Yuquan (1, 2); Liu, Ying (1, 2); Yang, Fanchao (3)

Author affiliation:(1) School of Telecommunication and Information Engineering, Xi'An University of Posts and Telecommunications, Xi'an; 710121, China; (2) Key Laboratory of Electronic Information Application Technology for Scene Investigation, Ministry of Public Security, Xi'an; 710121, China; (3) Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11566

Part number:1 of 1

Issue title:AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics

Issue date:2020

Publication year:2020

Article number:1156608

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639539

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Spectroscopy and Imaging; and Biomedical Optics, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165073

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Traditional anomaly detection algorithms for hyperspectral imagery does not consider spatial information of imagery, which decreases detection efficiency of anomaly detection. The traditional RXD algorithm uses Gauss model to evaluate the distribution of background, but ignores spatial correlation of the imagery. Aiming at improving detection efficiency, this paper proposed an anomaly detection algorithm which utilize both spatial and spectral information of hyperspectral imagery based on graph Laplacian. In this paper, an anomaly detection algorithm for hyperspectral imagery based on graph Laplacian (Graph Laplacian Anomaly Detection with Mahalanobis distance, LADM) is presented. The spatial information is considered in the model by graph Laplacian matrix. First, LADM considers not only spectral information but also the spatial information by mapping image to a graph. Secondly, a symmetrical normalization Laplacian matrix is constructed for the graph with Mahalanobis distance. The operation eliminates interference among the nodes, which improves the accuracy of Laplacian matrix and improves the detection result. Thirdly, LADM detectors is constructed with graph Laplacian detection model. Lastly, anomaly detection model based on graph is given based on graph Laplacian and spectral vector of the pixels. A threshold value is given to judge whether the currently detection pixel is anomaly or not. Experiments for synthetic data and real hyperspectral image is proposed in this paper. The proposed algorithm is compared with three classical anomaly detection algorithms. ROC curves and AUC values are given for both synthetic data and real data in the paper. Experiments results show that LADM algorithm can improve the accuracy of anomaly detection for hyperspectral imagery, and reduced the false alarm rate.

© 2020 SPIE. All rights reserved.

Number of references:19

Main heading:Anomaly detection

Controlled terms:Efficiency - Graph algorithms - Image enhancement - Laplace transforms - Matrix algebra - Photomapping - Pixels - Remote sensing - Signal detection - Spectroscopy

Uncontrolled terms:Anomaly detection models - Anomaly-detection algorithms - Detection efficiency - Hyper-spectral imageries - Mahalanobis distances - Spatial informations - Spectral information - Symmetrical normalizations

Classification code:405.3 Surveying - 716.1 Information Theory and Signal Processing - 913.1 Production Engineering - 921.1 Algebra - 921.3 Mathematical Transformations

DOI:10.1117/12.2575009

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201008273531

Title:Design and Simulation of an Intelligent Current Monitoring System for Urban Rail Transit????(Open Access)

Authors:Yao, Cheng (1); Zhao, Qinglei (2); Ma, Zelong (2); Zhou, Wei (2); Yao, Tong (3)

Author affiliation:(1) University of Chinese Academy of Science, Beijing; 100039, China; (2) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130033, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Zhao, Qinglei(zhaoql_ciomp@163.com)

Source title:IEEE Access

Abbreviated source title:IEEE Access

Volume:8

Issue date:2020

Publication year:2020

Pages:35973-35978

Article number:9003277

Language:English

E-ISSN:21693536

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:Many urban rail transit (URT) systems adopt the DC traction power supply system. Because of the impedance and incomplete ground insulation of the running track, it is inevitable for a part of the traction current to flow into the ground from the track, creating the stray current. This type of current causes great safety hazards to the metal structures in and near the URT system. Considering the power supply mode of the URT, this paper explores the different resistances in each power supply section under unilateral power supply and bilateral power supply. Then, the defects of the current discharge method were identified in the context of stray current protection. To solve these defects, the backpropagation neural network (BPNN) was adopted to build a discharge flow prediction model. On this basis, an intelligent current monitoring system was established for the URT. Finally, the authors simulated the impact of each factor on stray current, and verified the reliability and stability of the proposed monitoring system. Compared with predicted values and the actual values, the prediction agrees with the actual data very well.

© 2013 IEEE.

Number of references:23

Main heading:Monitoring

Controlled terms:Backpropagation - Defects - Electric power systems - Electric traction - Light rail transit - Neural networks - Predictive analytics

Uncontrolled terms:Back-propagation neural networks - Current discharge - Current monitoring systems - DC traction power supply systems - Design and simulation - Reliability and stability - Stray current - Urban rail transit

Classification code:433.1 Railroad Transportation, General - 706.1 Electric Power Systems - 723.4 Artificial Intelligence - 951 Materials Science

DOI:10.1109/ACCESS.2020.2975009

Funding details: Number: 11873046, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China under Grant 11873046.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20210509847798

Title:The Visible Telescope onboard the Chinese-French SVOM satellite

Authors:Fan, Xuewu (1); Zou, Gangyi (1, 2); Wei, Jianyan (3); Qiu, Yulei (3); Gao, Wei (1); Wang, Wei (1); Yang, Wengang (1); Zhang, Jian (1); Li, Chuang (1); Zhao, Hui (1); Dan, Lijun (1); Song, Zongxi (1); Feng, Liangjie (1); Ren, Guorui (1); Huang, Chao (1); Yuan, Hao (1); Sun, Zhonghan (1); Wang, Fengtao (1); Wang, Chenjie (1); Li, Wei (1); Shen, Chao (1); Qi, Ning (1); Pan, Yue (1, 2)

Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100012, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11443

Part number:1 of 1

Issue title:Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave

Issue date:2020

Publication year:2020

Article number:114430Q

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510636736

Document type:Conference article (CA)

Conference name:Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave

Conference date:December 14, 2020 - December 22, 2020

Conference location:Virtual, Online, United states

Conference code:166572

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:The Space-based multi-band astronomical Variable Objects Monitor (SVOM) project is a dedicated satellite developed at the cooperation of China and France, aim to make prompt multi-band observations of Gamma-Ray Bursts (GRBs), the afterglows and other high-energy transient astronomical events. The Visible Telescope (VT) is one of the four payloads onboard the SVOM. VT is designed to observe the afterglows of GRBs both in the visible and near infrared bands simultaneously. The telescope can reach a limiting magnitude of +22.5Mv and provide the redshift indicators for high-Z (z<4) GRBs. VT is also designed to measure the Relative Performance Errors (RPEs) for the satellite attitude and orbit control system (AOCS), aiming to improve the pointing stability of the platform during observation. VT adopts a Ritchey-Chrétien (RC) catadioptric optical configuration with a 440mm aperture and uses the dichroic prism before the focal plane to split the incident light into blue (visible) and red (near infrared) band. Two Fine Guidance Sensor (FGS) CCDs are mounted beside the main CCD on the blue band focal plane of VT and provide sub-arcsecond pixel resolution. Fiber reinforced plastic (CFRP) composites is selected as the material of VT's main structure to ensure enough stiffness and strength during launch. The electrical video processing circuit is carefully designed to make the readout noise below 6e-/pix (rms) in 100s exposure time. Active and passive thermal control are used together to ensure the optical performance and thermoelectric cooler (TEC) is adopted to control the main CCDs working temperature below -65°C to reduce the noise. This paper provides a comprehensive overview of the scientific requirements and the key instrument design aspects of optics, main structure, electrics, thermal control, performance test and validation results of VT.

© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:13

Main heading:Orbits

Controlled terms:Composite structures - Fiber reinforced plastics - Fibers - Flight control systems - Focusing - Gamma rays - Infrared devices - Millimeter waves - Satellites - Space telescopes - Thermal variables control - Thermoelectric equipment - Video signal processing

Uncontrolled terms:Fine guidance sensors - Gamma-ray bursts (GRBs) - Optical configurations - Relative performance - Satellite attitude and orbits - Thermoelectric cooler - Visible and near infrared - Working temperatures

Classification code:408.2 Structural Members and Shapes - 615.4 Thermoelectric Energy - 655.2 Satellites - 711 Electromagnetic Waves - 716.4 Television Systems and Equipment - 731.1 Control Systems - 731.3 Specific Variables Control - 741.3 Optical Devices and Systems - 931.3 Atomic and Molecular Physics

Numerical data indexing:Size 4.40e-01m, Time 1.00e+02s

DOI:10.1117/12.2561854

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508395828

Title:Optical design of the visible telescope for the SVOM mission

Authors:Fan, Xuewu (1); Zou, Gangyi (1, 2); Qiu, Yulei (3); Pang, Zhihai (1); Zhao, Hui (1); Chen, Qinfang (1); Pan, Yue (1, 2); Yuan, Hao (1)

Author affiliation:(1) Space Optics Laboratory, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) National Astronomical Observatories, Chinese Academy of Sciences, Beijing; 100012, China

Corresponding author:Zou, Gangyi(zougangyi@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:10

Issue date:April 1, 2020

Publication year:2020

Pages:3049-3057

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:This paper describes the optical design of the visible telescope (VT), which is the primary payload for the Chinese-French Space-based multi-band astronomical Variable Objects Monitor (SVOM) mission, for the detection and observation of high-redshift gamma-ray bursts. The VT aims at reaching a limiting magnitude of +22.5 Mv with the exposure time of 300 s in the 630 km Sun-synchronous orbit with an inclination of 30◦. The VT, also known as the fine guidance sensor for the SVOM, aims to measure the relative performance error (RPE) of the platform during the tracking and provide the RPE to the platform to correct its stability. The optical design is presented in this paper. The mirror manufacture and test results are presented. The optical system performance, tolerance budget, thermal analysis, and stray light design of VT are fully analyzed. Finally, the diffraction encircled energy and point source transmittance are tested in the lab for the finished telescope.

© 2020 Optical Society of America.

Number of references:16

Main heading:Gamma rays

Controlled terms:Budget control - Optical design - Optical systems - Optical testing - Stray light - Telescopes - Thermoanalysis

Uncontrolled terms:Encircled energy - Exposure-time - Fine guidance sensors - Gamma ray bursts - Point sources - Relative performance - Sun synchronous orbits - Tolerance budget

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 931.3 Atomic and Molecular Physics

Numerical data indexing:Size 6.30e+05m, Time 3.00e+02s

DOI:10.1364/AO.386177

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202008646670

Title:A novel photostable near-infrared-to-near-infrared fluorescent nanoparticle for in vivo imaging

Authors:Fan, Qi (1, 2); Cui, Xiaoxia (1, 3); Wang, Quan (1); Gao, Peng (4); Shi, Shengjia (5); Wen, Weihua (6); Guo, Haitao (1, 3); Xu, Yantao (1, 3); Peng, Bo (1, 3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences (UCAS), Beijing, China; (3) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China; (4) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China; (5) Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi'an; Shaanxi, China; (6) State Key Laboratory of Cancer Biology, Department of Immunology, Fourth Military Medical University, Xi'an; Shaanxi, China

Corresponding author:Cui, Xiaoxia(cuixx@opt.ac.cnemailgaopengxidian@163.comemailcuixx@opt.ac.cnemailgaopengxidian@163.com)Peng, Bo(gaopengxidian@163.comemailcuixx@opt.ac.cnemailgaopengxidian@163.com)Cui, Xiaoxia(cuixx@opt.ac.cnemailgaopengxidian@163.com)Peng, Bo(gaopengxidian@163.com)

Source title:Journal of Biomedical Materials Research - Part B Applied Biomaterials

Abbreviated source title:J. Biomed. Mater. Res. Part B Appl. Biomater.

Volume:108

Issue:7

Issue date:October 1, 2020

Publication year:2020

Pages:2912-2924

Language:English

ISSN:15524973

E-ISSN:15524981

CODEN:JBMRGL

Document type:Journal article (JA)

Publisher:John Wiley and Sons Inc, Postfach 10 11 61, 69451 Weinheim, Boschstrabe 12, 69469 Weinheim, Deutschland, 69469, Germany

Abstract:Water-soluble K5HoLi2F10 (KHLF) nanoprobes with the excitation and emission both in the near-infrared (NIR) region were developed and first demonstrated for in vivo imaging of living mice. The PEG400 coating endows the nanoprobes with good water solubility and biocompatibility. Doping with Ho3+ ions is capable of emitting NIR fluorescence with two peaks centered, respectively, at 887 and 1,180 nm once excited by a 808 nm laser; meanwhile, it also possess good photothermal conversion performance. The KHLF matrix with specifically structure of large ion-distance and low photon energy imparts the nanoprobes low quenching effect and excellent photostability (fluorescence decrease <5% upon 120 min illumination of 808 nm continuous laser with a power density of 1 W/cm2). The nanoparticles (NPs) were tested for in vitro bioimaging with living mice. The results show the NPs have low biotoxicity, rapid metabolism, normal biodistribution, together with the photothermal imaging performance and a high-contrast fluorescence images (signal-to-background ratio of 14:1). The superior performances of these nanoprobes in vivo imaging of mice proclaim the great potential of this type of probe for high-contrast imaging and photothermal treatment in practical applications.

© 2020 Wiley Periodicals, Inc.

Number of references:41

Main heading:Infrared devices

Controlled terms:Biocompatibility - Fluorescence - Holmium compounds - Lithium compounds - Mammals - Nanoparticles - Nanoprobes

Uncontrolled terms:Good water-solubility - High contrast imaging - Nanoparticle (NPs) - Near infrared region - Near-infrared fluorescent - Photo-thermal conversions - Photothermal imaging - Signal-to-background ratio

Classification code:461.9.1 Immunology - 741.1 Light/Optics - 761 Nanotechnology - 933 Solid State Physics

Numerical data indexing:Size 1.18e-06m, Size 8.08e-07m, Size 8.87e-07m, Surface_Power_Density 1.00e+04W/m2, Time 7.20e+03s

DOI:10.1002/jbm.b.34622

Funding details: Number: 2014JQ8345, Acronym: -, Sponsor: -;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 61475189,61205039, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was financially supported by the National Natural Science Foundation of China (Nos. 61205039 and 61475189) and Natural Science Basic Research Plan in Shaanxi Province of China (No. 2014JQ8345). Open Research Fund of Key Laboratory of Spectral Imaging Technology from Chinese Academy of Sciences.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204409413303

Title:Approximate Reliability Analysis for New Generation Avionics Network

Authors:Guo, Lin (1, 2); Wang, Xiaodong (1, 3); Wang, Zhuqing (1); Zhang, Shuang (4); Guo, Yangming (1)

Author affiliation:(1) Northwestern Polytechnical University, College of Computer Science, Xi'an; 710072, China; (2) China Academy of Aerospace Aerodynamics, Beijing; 100074, China; (3) Research and Development Institute, Northwestern Polytechnical University in Shenzhen, Shenzhen; 518057, China; (4) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Source title:2020 Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling, APARM 2020

Abbreviated source title:Asia-Pacific Int. Symp. Adv. Reliab. Maint. Model., APARM

Part number:1 of 1

Issue title:2020 Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling, APARM 2020

Issue date:August 2020

Publication year:2020

Article number:9209403

Language:English

ISBN-13:9781728171029

Document type:Conference article (CA)

Conference name:2020 Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling, APARM 2020

Conference date:August 20, 2020 - August 23, 2020

Conference location:Vancouver, BC, Canada

Conference code:163577

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:The new generation avionics network consists of various topologies including point-to-point, arbitrated loop and switched structures. The precise reliability computation of such a large-scale network seems to be an NP-hard problem. According to the reliability analysis and feature of avionic networks, this paper proposed three reliability computation models via topological transformations which are the possible connecting cases of equipment and links in the avionics networks. The proposed models can be applied to compute the reliabilities of point-to-point and arbitrated loop topologies structures precisely, and also the probability of switched topology structure approximately through determining the upper bound. While the approximate reliability calculation process of the avionics system network can be conducted by combining the proposed models for different sub-structures three models. Finally, the approximate reliability analysis of a certain avionic network example is performed with the corresponding result being provided, and then the rules of approximate reliability computing are also indicated.

© 2020 IEEE.

Number of references:15

Main heading:Reliability analysis

Controlled terms:Avionics - NP-hard - Topology

Uncontrolled terms:Avionics networks - Avionics systems - Computation model - Large-scale network - Reliability calculation - Reliability computing - Topological transformation - Topology structure

Classification code:715 Electronic Equipment, General Purpose and Industrial - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1109/APARM49247.2020.9209403

Funding details: Number: MJ-2016-S-42,MJ-2018-S-34, Acronym: -, Sponsor: -;Number: 2019PT-03, Acronym: -, Sponsor: -;

Funding text:This work is supported by the Project of National Defense Basic Research Program, Equipment Community Technology Pre-research Project, National Key Scientific Research Project Under Grant No. MJ-2016-S-42 and No. MJ-2018-S-34 , Shaanxi Science and Technology Program Under Grant No. 2019PT-03 and Science and technology project of State Grid Zhejiang Electric Power Co., Ltd.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201608414373

Title:Method to control near-field bowing of laser diode arrays by balancing the thermal-induced stress

Authors:Zhang, Hongyou (1, 2, 3); Zah, Chung-En (3); Liu, Xingsheng (1, 2, 3, 4)

Author affiliation:(1) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Focuslight Technologies Inc., Xi'an, Shaanxi, China; (4) University of Chinese Academy of Sciences, Center of Materials Science and Optoelectronics Engineering, Beijing, China

Corresponding author:Zhang, Hongyou(zhanghy01@focuslight.com)

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:59

Issue:3

Issue date:March 1, 2020

Publication year:2020

Article number:036104

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE

Abstract:Due to the thermal-induced stress during the bonding process, the emitters in a laser diode array (LDA) are vertically displaced, which causes the near-field bowing of a laser diode bar (i.e., the SMILE effect). Near-field bowing degrades the laser beam brightness, adversely affecting optical coupling and beam shaping, resulting in a larger divergence angle and a wider line after focusing and collimation. The mechanism of near-field bowing has been theoretically studied, in which the ratio of tensile strength between submount and heat sink has a great effect on the deformation of LDAs. Arm-wrestling between CuW submount and heat sink vividly describes that the deformation of LDAs changes as a function of the ratio of two materials' tensile strength. We design a symmetrical structure that bonds another submount on the bottom of the heat sink to control the SMILE effect by balancing the acting force from the top of the heat sink. The deformation of the heat sink and LDAs are approximately zero when the thermal-induced stresses forced on the top and bottom of the heat sink are equal.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).

Number of references:18

Main heading:Laser Doppler velocimeters

Controlled terms:Copper alloys - Deformation - Diodes - Heat sinks - Laser beams - Tensile strength

Uncontrolled terms:Beam brightness - Bonding process - Divergence angle - Laser diode arrays - Laser diode bars - Optical couplings - Symmetrical structure - Thermal induced stress

Classification code:544.2 Copper Alloys - 616.1 Heat Exchange Equipment and Components - 744.8 Laser Beam Interactions - 744.9 Laser Applications

DOI:10.1117/1.OE.59.3.036104

Funding details: Number: 2018YFB1107303, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);

Funding text:We would like to thank for Mr. Pengfei Zhu and Wenwei Li from Focuslight Inc. for their experimental support and acknowledge the support from the National Key Research and Development Program of China under Grant No. 2018YFB1107303.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202908951772

Title:Accurate volume measurement of road potholes based on 3d point clouds

Authors:Xu, Mingming (1, 2); Zhou, Zuofeng (1); Wu, Qingquan (3); Huang, Huimin (1, 2); Du, Ying (1, 2); Cao, Jianzhong (1); Hu, Guoliang (1, 2)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xinxi Road, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key and Core Technology Innovation, Institute of the Greater Bay Area, Guangzhou; 510670, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11519

Part number:1 of 1

Issue title:Twelfth International Conference on Digital Image Processing, ICDIP 2020

Issue date:2020

Publication year:2020

Article number:115191V

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510638457

Document type:Conference article (CA)

Conference name:12th International Conference on Digital Image Processing, ICDIP 2020

Conference date:May 19, 2020 - May 22, 2020

Conference location:Osaka, Japan

Conference code:161141

Sponsor:International Association of Computer Science and Information Technology

Publisher:SPIE

Abstract:In the daily driving process, road potholes pose a great threat to traffic safety. However, the actual road potholes are often irregular and the background is complex. So, it is difficult to accurately measure the volume of potholes. In this paper, a method for measuring the volume of road potholes based on three-dimensional point clouds is presented. First, binocular vision is used to obtain 3D point cloud data of the pothole, and the segmented pothole point clouds are projected onto the coordinate plane established by the road surface. Then, we triangulate projection points on the coordinate plane. Finally, restore these points to the true elevation points to generate triangular prism, and calculate the volume of a single triangular prism one by one. The accuracy and effectiveness of this algorithm are verified by experiments.

© 2020 SPIE.

Number of references:9

Main heading:Landforms

Controlled terms:Binocular vision - Prisms - Roads and streets - Stereo image processing - Volume measurement

Uncontrolled terms:3D point cloud - Coordinate plane - Point cloud - Road surfaces - Three-dimensional point clouds - Traffic safety - Triangular prism

Classification code:406.2 Roads and Streets - 481.1 Geology - 723.2 Data Processing and Image Processing - 741.2 Vision - 741.3 Optical Devices and Systems - 943.2 Mechanical Variables Measurements

DOI:10.1117/12.2573129

Funding details: Number: 2020B090922005, Acronym: -, Sponsor: -;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019JQ-295, Acronym: -, Sponsor: -;

Funding text:This work was jointly supported by the National Natural Science Foundation of China (No.51905529), the Shaanxi province natural science basic research program (2019JQ-295), the Shaanxi Key Industry Innovation Chain Program (No.2020ZDLGY04-03) and the Guangdong Key Research and Development Program (No.2020B090922005).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202608879521

Title:Design of infrared dual-band/dual-FOV imaging early warning system

Title of translation:红外双波段双视场成像告警系统设计

Authors:Zhang, Hong-Wei (1, 2, 3); Ding, Ya-Lin (1); Ma, Ying-Jun (3); Chen, Wei-Ning (3)

Author affiliation:(1) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130033, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Ding, Ya-Lin(dingyl@ciomp.ac.cn)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:28

Issue:6

Issue date:June 1, 2020

Publication year:2020

Pages:1283-1294

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences

Abstract:To address the demand for detection of point/dim targets in complex environments, an infrared dual-band dual-field of view (FOV) imaging early warning system was designed. To improve the target detection capability and environmental adaptability, the system used high-order aspheric surfaces to reduce the number of system lenses and improve the system transmittance. At the same time, it corrects on-axis/off-axis aberrations and advanced aberrations to improve the imaging quality of the system. An optical passive compensation method was adopted to realize an athermalized design in the range of -40℃ to 60℃. A rotating electromagnet was used as the driving element to complete the zooming in process in a duration of 80 ms to ensure that the target is not lost during the FOV switching process. Using the electric limit, mechanical limit, and magnetic locking mechanism as limit components, the stabilization accuracy of the optical axis wobble is less than two pixels. The design results show that the optical-mechanical structure of the infrared imaging early warning system is reasonable and compact, the imaging quality is good, and it meets the requirements of target detection. The system has potential application prospects in the field of infrared imaging in early warning systems.

© 2020, Science Press. All right reserved.

Number of references:17

Main heading:Thermography (imaging)

Controlled terms:Engineering - Optics

Uncontrolled terms:Application prospect - Complex environments - Detection capability - Early Warning System - Environmental adaptability - High-order aspheric surfaces - Optical-mechanical structures - Passive compensation

Classification code:741.1 Light/Optics - 742.1 Photography

DOI:10.3788/OPE.20202806.1283

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202908946279

Title:A Survey of Human Action Analysis in HRI Applications

Authors:Ji, Yanli (1); Yang, Yang (1); Shen, Fumin (1); Shen, Heng Tao (1); Li, Xuelong (2)

Author affiliation:(1) Center for Future Media, School of Computer Science Engineering, University of Electronic Science and Technology of China, Chengdu, China; (2) State Key Laboratory of Transient Optics and Photonics, Center for OPTical IMagery Analysis and Learning, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Shen, Heng Tao(shenhengtao@hotmail.com)

Source title:IEEE Transactions on Circuits and Systems for Video Technology

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:30

Issue:7

Issue date:July 2020

Publication year:2020

Pages:2114-2128

Article number:8698327

Language:English

ISSN:10518215

E-ISSN:15582205

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:The human action is an important information source for human social interaction, and it simultaneously plays a crucial role in human-robot interaction (HRI). For a natural and fluent interaction, robots are required to understand human actions and have the capacity to predict action intentions and to imitate human actions for an appropriate response. Currently, existing survey papers for the action recognition mainly summarize algorithms that perform action recognition in experimental scenarios, and survey papers of the HRI mainly introduced various interaction interfaces in the HRI. Different from these surveys, we focus on the human action analysis on robot platforms for the HRI application, including the body motion and gestures. We review the existing HRI related references involving the action recognition, prediction, and the robot imitation of the human action. Moreover, we give a summary of robot platforms and action datasets that are frequently used in the study of HRI. Finally, we give an analysis on the development trend and future research directions of action analysis for the HRI applications.

© 1991-2012 IEEE.

Number of references:151

Main heading:Social robots

Controlled terms:Surveys

Uncontrolled terms:Action recognition - Development trends - Future research directions - Human action analysis - Human robot Interaction (HRI) - Human social interactions - Information sources - Interaction interface

DOI:10.1109/TCSVT.2019.2912988

Funding details: Number: B17008, Acronym: -, Sponsor: Higher Education Discipline Innovation Project;Number: 61673088, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Manuscript received March 13, 2019; accepted April 21, 2019. Date of publication April 24, 2019; date of current version July 2, 2020. This work was supported in part by the Natural Science Foundation of China (NSFC) under Grant 61673088 and in part by the 111 Project under Grant B17008. This paper was recommended by Associate Editor G.-J. Qi. (Corresponding author: Heng Tao Shen.) Y. Ji, Y. Yang, F. Shen, and H. T. Shen are with the Center for Future Media, School of Computer Science Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China (e-mail: yanliji@uestc. edu.cn; shenhengtao@hotmail.com).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20194407592745

Title:Novel direct remaining useful life estimation of aero-engines with randomly assigned hidden nodes

Authors:Bai, Jian-Ming (1, 2); Zhao, Guang-She (3); Rong, Hai-Jun (1)

Author affiliation:(1) State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Key Laboratory of Environment and Control for Flight Vehicle, School of Aerospace, Xi’an Jiaotong University, Xi’an; 710049, China; (2) Optical Direction and Pointing Technique Research Department, Xi’an Institute of Optics and Precision Mechanics of CAS, Xi’an; 710119, China; (3) School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an; 710049, China

Corresponding author:Rong, Hai-Jun(hjrong@mail.xjtu.edu.cn)

Source title:Neural Computing and Applications

Abbreviated source title:Neural Comput. Appl.

Volume:32

Issue:18

Issue date:September 1, 2020

Publication year:2020

Pages:14347-14358

Language:English

ISSN:09410643

E-ISSN:14333058

Document type:Journal article (JA)

Publisher:Springer Science and Business Media Deutschland GmbH

Abstract:This paper aims to improve data-driven prognostics by presenting a novel approach of directly estimating the remaining useful life (RUL) of aero-engines without requiring setting any failure threshold information or estimating degradation states. Specifically, based on the sensory data, RUL estimations are directly obtained through the universal function approximation capability of the extreme learning machine (ELM) algorithm. To achieve this, the features related with the RUL are first extracted from the sensory data as the inputs of the ELM model.Besides, to optimize the number of observed sensors, three evaluation metrics of correlation, monotonicity and robustness are defined and combined to automatically select the most relevant sensor values for more effective and efficient remaining useful life predictions. The validity and superiority of the proposed approach is evaluated by the widely used turbofan engine datasets from NASA Ames prognostics data repository.The proposed approach shows improved RUL estimation applicability at any time instant of the degradation process without determining the failure thresholds. This also simplifies the RUL estimation procedure. Moreover, the random properties of hidden nodes in the ELM learning mechanisms ensures the simplification and efficiency for real-time implementation. Therefore, the proposed approach suits to real-world applications in which prognostics estimations are required to be fast.

© 2019, Springer-Verlag London Ltd., part of Springer Nature.

Number of references:58

Main heading:Aircraft engines

Controlled terms:Approximation algorithms - Engines - Knowledge acquisition - Machine learning - NASA - Real time control - Turbofan engines

Uncontrolled terms:Aero-engine - Data-driven prognostics - Degradation process - Extreme learning machine - Real-time implementations - Remaining useful life predictions - Remaining useful lives - Universal functions

Classification code:653.1 Aircraft Engines, General - 723.4 Artificial Intelligence - 731 Automatic Control Principles and Applications - 921 Mathematics

DOI:10.1007/s00521-019-04478-1

Funding details: Number: -, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work is funded by the Fundamental Research Funds for the Central Universities.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202908951807

Title:A pothole detection method based on 3d point cloud segmentation

Authors:Du, Ying (1, 2); Zhou, Zuofeng (1); Wu, Qingquan (3); Huang, Huimin (1, 2); Xu, Mingming (1, 2); Cao, Jianzhong (1); Hu, Guoliang (1, 2)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xinxi Road, Xi'an; 710119, China; (2) chn, Beijing; 100049, Beijing; (3) chn, Guangzhou; 510670, Guangzhou

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11519

Part number:1 of 1

Issue title:Twelfth International Conference on Digital Image Processing, ICDIP 2020

Issue date:2020

Publication year:2020

Article number:1151909

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510638457

Document type:Conference article (CA)

Conference name:12th International Conference on Digital Image Processing, ICDIP 2020

Conference date:May 19, 2020 - May 22, 2020

Conference location:Osaka, Japan

Conference code:161141

Sponsor:International Association of Computer Science and Information Technology

Publisher:SPIE

Abstract:Road potholes affect comfort, safety, traffic condition and vehicle stability. Accurately detecting these potholes is vital for assessing the degree of pavement distress and developing road maintenance plan accordingly. This paper proposes a simple and effective pothole detection method based on 3D point cloud segmentation. Using binocular stereo vision to acquire 3D point clouds, fitting the pavement plane and then eliminating it from the 3D point clouds of road scene, we could roughly extract the pothole. K-means clustering and region growing algorithms were adopted to extract the potholes precisely. The experimental results demonstrate that our proposed method has a very good segmentation effect on scenes involving plane and target object.

© 2020 SPIE.

Number of references:19

Main heading:Stereo image processing

Controlled terms:Highway planning - K-means clustering - Landforms - Pavements - Stereo vision

Uncontrolled terms:3D point cloud - Binocular stereo vision - Detection methods - Pavement distress - Region growing algorithm - Road maintenance - Traffic conditions - Vehicle stability

Classification code:432.1 Highway Transportation, General - 481.1 Geology - 723.2 Data Processing and Image Processing - 723.5 Computer Applications

DOI:10.1117/12.2573124

Funding details: Number: 2020B090922005, Acronym: -, Sponsor: -;Number: 2019JQ-295, Acronym: -, Sponsor: -;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was jointly supported by the National Natural Science Foundation of China (No.51905529), the Natural Science Basic Research Program of Shaanxi Province (2019JQ-295), Shaanxi Key Industry Innovation Chain Program(No.2020ZDLGY04-03) and Guangdong Key Research and Development Program(No.2020B090922005).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20194907776347

Title:Effect of cation vacancies on the optical and dielectric properties of KSr2Nb5O15: A first-principles study

Authors:Chen, Qian (1); Gao, Feng (1); Xu, Jie (1); Wu, Changying (2); Cao, Shuyao (1); Guo, Yiting (1); Pawlikowska, Emilia (3); Szafran, Miko&lstrok;aj (3); Cheng, Guanghua (2, 4)

Author affiliation:(1) State Key Laboratory of Solidification Processing, MIIT Key Laboratory of Radiation Detection Materials and Devices, USI Institute of Intelligence Materials and Structure, NPU-QMUL Joint Research Institute of Advanced Materials and Structure, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, China; (2) School of Electronics and Information, Northwestern Polytechnical University, Xi'an, China; (3) Faculty of Chemistry, Warsaw University of Technology, Warsaw, Poland; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; Shaanxi, China

Corresponding author:Gao, Feng(gaofeng@nwpu.edu.cn)

Source title:Journal of the American Ceramic Society

Abbreviated source title:J Am Ceram Soc

Volume:103

Issue:3

Issue date:March 1, 2020

Publication year:2020

Pages:1912-1926

Language:English

ISSN:00027820

E-ISSN:15512916

CODEN:JACTAW

Document type:Journal article (JA)

Publisher:Blackwell Publishing Inc.

Abstract:Using first-principles calculations, the effect of cation vacancies on the electronic structures and optical characters of KSr2Nb5O15 (KSN) lead-free ferroelectrics are investigated. The calculated dielectric properties are demonstrated by the experimental results. The cation vacancies involve K+ vacancies (KSN-K), Sr2+ vacancies (KSN-Sr), and coexisting K+ and Sr2+ vacancies (KSN-K&Sr). When these cation vacancies exist in KSN, the unit cell volumes decrease, leading to phase transition from tetragonal to orthorhombic, and the cation vacancies show strong effects on the band gap of KSN, declining by 1.46%-9.46%. The optical properties including the static dielectric constants, refraction, and extinction coefficient of KSN-K, KSN-Sr, and KSN-K&Sr increase more than those of KSN without vacancies, but the reflectivity and loss function decrease. All structures with cation vacancies are mainly refractive in the 0-4 eV photon energy range and are reflective at 5-8 eV. The refractivity increases and reflectivity decreases after vacancies occur. KSN-Sr has the largest static dielectric constant while KSN-K&Sr has the smallest values. The dielectric constant can be adjusted in the range of 25% by controlling the cation vacancies. The calculated dielectric properties are in good agreement with the experimental results. The results pave the way to regulate the optical and dielectric properties of lead-free ferroelectrics by controlling different cation vacancies.

© 2019 The American Ceramic Society

Number of references:42

Main heading:Strontium compounds

Controlled terms:Calculations - Dielectric properties - Electronic structure - Energy gap - Niobium compounds - Optical properties - Positive ions - Reflection - Refraction - Vacancies

Uncontrolled terms:Extinction coefficients - First-principles calculation - First-principles study - First-principles theory - Lead-free ferroelectrics - Optical and dielectric properties - Photon energy range - Static dielectric constants

Classification code:741.1 Light/Optics - 921 Mathematics - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids

Numerical data indexing:Percentage 1.46e+00% to 9.46e+00%, Percentage 2.50e+01%

DOI:10.1111/jace.16909

Funding details: Number: 2019KW‐054, Acronym: -, Sponsor: -;Number: JCYJ20170306155944271, Acronym: -, Sponsor: -;Number: 51672219, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 06450‐G2019KY0601, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work was supported by the National Natural Science Foundation of China (No. 51672219, 51702259), China‐Poland International Collaboration Fund of National Natural Science Foundation of China (No. 51961135301), Shaanxi Provincial Key R&D Program for the International Cooperation (No. 2019KW‐054), the Basic Research Program of Shenzhen (No. JCYJ20170306155944271), the Fundamental Research Funds for the Central Universities (No. 06450‐G2019KY0601), and the "111" Project (No. B08040). We would like to thank the Analytical & Testing Center of Northwestern Polytechnical University for the measurement of SEM and dielectric properties.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202108677201

Title:Design of a novel high-performance ultrafast optical framing camera

Authors:Lei, X. (1); Cai, C. (2); Zhang, M. (2); Wu, S. (1); Wang, J. (2); Tian, J. (2); Lu, Y. (2); Wen, W. (2); Pei, C. (3, 4); Liu, A. (2)

Author affiliation:(1) Key Laboratory for Physical Electronics and Devices, Ministry of Education, Xi'An Jiaotong University, Xi'an; 710049, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Department of Automation, Tsinghua University, Beijing; 100084, China; (4) Jiuquan Satellite Launch Centre, 286 Yong'an Road, Shazhou Town, Dunhuang City, Gansu Province, China

Corresponding author:Pei, C.(pcq4292669@126.com)

Source title:Journal of Instrumentation

Abbreviated source title:J. Instrum.

Volume:15

Issue:3

Issue date:March 2020

Publication year:2020

Article number:P03007

Language:English

E-ISSN:17480221

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:The analysis of fast physical phenomena is a relevant tool in several fields including atomic physics and photochemistry. In turn, to record phenomena occurring on an ultra-short time scale, one needs an imaging system that can accurately capture the event. In this paper, we propose a novel ultrafast optical framing camera that achieves a spatial resolution up to 36.6 LP/mm while keeping a high temporal resolution of 3.25 ns using a digital delay generator. Our technique involves the splitting of light into four beams and their imaging on four ICCD cameras. In addition, the data transfer system is designed to combine data-streams from multiple digital ports into a single output, thus providing a compact user interface. The characteristic parameters influencing the temporal resolution of the image intensifier has been analyzed, and the framing camera has been experimentally assessed. Our results show that a temporal resolution of 3.25 ns and a spatial resolution of 36.6 LP/mm can be obtained. We foresee the use of our apparatus for inertial confined fusion.

© 2020 IOP Publishing Ltd and Sissa Medialab.

Number of references:29

Main heading:Cameras

Controlled terms:Atomic physics - Data streams - Data transfer - Image resolution - Inertial confinement fusion - User interfaces

Uncontrolled terms:Framing Camera - High temporal resolution - Inertial confined fusion - Physical phenomena - Short time scale - Spatial resolution - Temporal resolution - Transfer systems

Classification code:722.2 Computer Peripheral Equipment - 742.2 Photographic Equipment - 931.3 Atomic and Molecular Physics - 932.2.1 Fission and Fusion Reactions

Numerical data indexing:Time 3.25e-09s

DOI:10.1088/1748-0221/15/03/P03007

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204709510957

Title:Freeform-Surface-Based Optical Detection System with Large Relative Aperture and Large Field of View

Title of translation:基于自由曲面的大相对孔径大视场光学探测系统

Authors:Ma, Zixuan (1, 2); Li, Xuyang (1, 2); Ren, Zhiguang (1, 3); Chu, Nanqing (1, 2)

Author affiliation:(1) Space Optics Technology Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China

Corresponding author:Ma, Zixuan(ma7772013@163.comemaillixuyang2004@126.com)Li, Xuyang(lixuyang2004@126.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:40

Issue:17

Issue date:September 10, 2020

Publication year:2020

Article number:1722002

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to realize the requirements of the sensitivity, detection timeliness, aperture and total length of an optical detection system in the space debris detection scenario, we design a space optical detection system with a large relative aperture and large field of view. Moreover, based on the detector index and target characteristics, we determine the design parameters and realize the detection of 12.5 magnitude stars. The system uses an asymmetrical double Gaussian lens group optical structure and has the working band of 450-850 nm, field of view of 20°, F number of 1.05, and entrance pupil diameter of 150 mm. We design the front surface of a lens in the system based on an XY polynomial freeform surface. The design and analysis results show that the diffuse spot of the system is within the 2×2 detection pixels, the surrounding full field-of-view energy ratio within the 2×2 detection pixels is larger than 86%, and the maximum distortion is less than 1.4%. The optical detection system possesses a compact structure, a reasonable aperture, good detection effect, high detection sensitivity, and strong timeliness. The performance of the adopted materials meets the conditions of space use and matches up with the optical processing capability. The designed detection system can be used for the accurate detection of space debris.

© 2020, Chinese Lasers Press. All right reserved.

Number of references:18

Main heading:Optical systems

Controlled terms:Lenses - Pixels - Space debris

Uncontrolled terms:Design and analysis - Detection sensitivity - Detection timeliness - Large field of views - Optical detection system - Optical processing - Optical structures - Target characteristic

Classification code:656.1 Space Flight - 741.3 Optical Devices and Systems

Numerical data indexing:Percentage 1.40e+00%, Percentage 8.60e+01%, Size 1.50e-01m, Size 4.50e-07m to 8.50e-07m

DOI:10.3788/AOS202040.1722002

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210409825895

Title:Design of ultra-compact optical detection system with large field of view

Title of translation:大视场超紧凑探测光学系统设计

Authors:Ma, Zi-Xuan (1, 2); Li, Xu-Yang (1, 2); Ren, Zhi-Guang (1, 3); Chu, Nan-Qing (1, 2)

Author affiliation:(1) Space Optics Technology Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Physics and Information Technology, Shanxi Normal University, Xi'an; 710119, China

Corresponding author:Li, Xu-Yang(lixuyang2004@126.com)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:28

Issue:12

Issue date:December 2020

Publication year:2020

Pages:2581-2587

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences

Abstract:To achieve the accurate detection of 14th-magnitude targets, a large-field-of-view optical detection system was designed. First, according to the selected CCD231-84 E2V photodetector, the initial parameters, such as system entrance pupil and focal length, were calculated. Then, based on the selected parameters, the initial structure was selected, and the form of the Maxutov telescope was selected and improved. Then, the detection performance of the design results was analyzed. Finally, a tolerance analysis and optimization of the designed system were conducted so that it could meet the needs of processing and assembly. The design and analysis results indicate that the optical detection system adopts a spherical catadioptric mirror surface, the total length of the system is 350 mm, the full field of view for a 30 μm surrounding energy distribution is >86%, and the maximum distortion is <1%. The system has a large field of view, aperture, and relative aperture. It is compact and of suitable size, easy to install, and offers high detection performance, high detection sensitivity, and a wide detection range, making it useful for the accurate detection of targets.

© 2020, Science Press. All right reserved.

Number of references:10

Main heading:Fits and tolerances

Controlled terms:Engineering - Optics

Uncontrolled terms:Catadioptric mirrors - Design and analysis - Detection performance - Detection sensitivity - Energy distributions - Large field of views - Optical detection system - Tolerance analysis

Classification code:741.1 Light/Optics

Numerical data indexing:Size 3.00e-05m, Size 3.50e-01m

DOI:10.37188/OPE.20202812.2581

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202308782384

Title:Theory and Method of Fourier Transform Hyperspectral Mueller Matrix Imaging

Title of translation:傅里叶变换高光谱Mueller矩阵成像理论与方法

Authors:Liu, Jie (1); Li, Jianxin (1); Bai, Caixun (2); Xu, Yixuan (1); Qian, Jiamin (1); Wang, Yubo (1)

Author affiliation:(1) School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing; Jiangsu; 210094, China; (2) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China

Corresponding author:Li, Jianxin(ljx@vip.163.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:40

Issue:7

Issue date:April 10, 2020

Publication year:2020

Article number:0711004

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:A hyperspectral Mueller matrix imaging (HMMI) method to capture spatial, spectral and Mueller matrix images at the same time is proposed. The principle of hyperspectral Mueller matrix imaging and the shear interference imaging process of birefringent interferometer are discussed in detail. The joint optimization design of polarization state generator and polarization state analyzer as well as the calibration method of this system is shown. In order to verify the performance of the instrument, the spectral Mueller matrix imaging of the target in the laboratory proves the feasibility of HMMI in quickly acquiring spectral images and Mueller matrix images. Because of its high spectral resolution and fast polarization modulation, it provides a new idea for the development of spectral Mueller matrix imaging.

© 2020, Chinese Lasers Press. All right reserved.

Number of references:18

Main heading:Hyperspectral imaging

Controlled terms:Matrix algebra - Polarization - Spectral resolution - Spectroscopy

Uncontrolled terms:Calibration method - High spectral resolution - Interference imaging - Joint optimization - Polarization modulation - Polarization state analyzer - Polarization-state generators - Theory and methods

Classification code:741.1 Light/Optics - 921.1 Algebra

DOI:10.3788/AOS202040.0711004

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202908937137

Title:Remote Sensing Road Extraction by Refining Road Topology

Authors:Gao, Huiqin (1, 2); Yuan, Yuan (3); Zheng, Xiangtao (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi’an; 710072, China

Corresponding author:Zheng, Xiangtao(zhengxiangtao@opt.cn)

Source title:Lecture Notes in Electrical Engineering

Abbreviated source title:Lect. Notes Electr. Eng.

Volume:657

Part number:1 of 1

Issue title:Proceedings of the 6th China High Resolution Earth Observation Conference, CHREOC 2019

Issue date:2020

Publication year:2020

Pages:187-197

Language:English

ISSN:18761100

E-ISSN:18761119

ISBN-13:9789811539466

Document type:Conference article (CA)

Conference name:6th China High Resolution Earth Observation Conference, CHREOC 2019

Conference date:September 1, 2019 - September 1, 2019

Conference location:Chengdu, China

Conference code:241449

Publisher:Springer

Abstract:Remote sensing road extraction is one of the research hotspots in high-resolution remote sensing images. However, many road extraction methods cannot hold the edge interference, including shadows of sheltered trees and vehicles. In this paper, a novel remote sensing road extraction (RSRE) method based on deep learning is proposed, which considers the road topology information refinement in high-resolution image. Firstly, two parallel operations, which named dilation module (DM) and message module (MM) in this paper, are embedded in the center of semantic segmentation network to tackle the issue of incoherent edges. DM containing dilated convolutions is used to capture more context information in remote sensing images. MM consisting of slice-by-slice convolutions is used to learn the spatial relations and the continuous prior of the road efficiently. Secondly, a new loss function is designed by combining dice coefficient term and binary cross-entropy term, which can leverage the effects of different loss. Finally, extensive experimental results demonstrate that the RSRE outperforms the state-of-the-art methods in two public datasets.

© 2020, Springer Nature Singapore Pte Ltd.

Number of references:28

Main heading:Remote sensing

Controlled terms:Convolution - Deep learning - Extraction - Feature extraction - Image processing - Observatories - Roads and streets - Semantics - Topology

Uncontrolled terms:High resolution image - High resolution remote sensing images - Parallel operations - Remote sensing images - Road extraction method - Semantic segmentation - State-of-the-art methods - Topology information

Classification code:406.2 Roads and Streets - 716.1 Information Theory and Signal Processing - 802.3 Chemical Operations - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1007/978-981-15-3947-3_14

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202108696961

Title:Application of rare earth-doped nanoparticles in biological imaging and tumor treatment

Authors:Fan, Qi (1, 2); Cui, Xiaoxia (1, 3); Guo, Haitao (1, 3); Xu, Yantao (1, 3); Zhang, Guangwei (4); Peng, Bo (1, 3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi’an; Shaanxi, China; (2) University of Chinese Academy of Sciences (UCAS), Beijing, China; (3) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China; (4) Zhejiang Fountain Aptitude Technology Inc, Hangzhou; Zhejiang, China

Corresponding author:Cui, Xiaoxia(cuixx@opt.ac.cnemailcuixx@opt.ac.cn)Cui, Xiaoxia(cuixx@opt.ac.cn)

Source title:Journal of Biomaterials Applications

Abbreviated source title:J. Biomater. Appl.

Volume:35

Issue:2

Issue date:August 1, 2020

Publication year:2020

Pages:237-263

Language:English

ISSN:08853282

E-ISSN:15308022

CODEN:JBAPEL

Document type:Journal article (JA)

Publisher:SAGE Publications Ltd

Abstract:Rare earth-doped nanoparticles have been widely used in disease diagnosis, drug delivery, tumor therapy, and bioimaging. Among various bioimaging methods, the fluorescence imaging technology based on the rare earth-doped nanoparticles can visually display the cell activity and lesion evolution in living animals, which is a powerful tool in biological technology and has being widely applied in medical and biological fields. Especially in the band of near infrared (700–1700 nm), the emissions show the characteristics of deep penetration due to low absorption, low photon scattering, and low autofluorescence interference. Furthermore, the rare earth-doped nanoparticles can be endowed with the water solubility, biocompatibility, drug-loading ability, and the targeting ability for different tumors by surface functionalization. This confirms its potential in the cancer diagnosis and treatment. In this review, we summarized the recent progress in the application of rare earth-doped nanoparticles in the field of bioimaging and tumor treatment. The luminescent mechanism, properties, and structure design were also discussed.

© The Author(s) 2020.

Number of references:188

Main heading:Drug delivery

Controlled terms:Biocompatibility - Biology - Diagnosis - Disease control - Fluorescence imaging - Infrared devices - Medical imaging - Nanoparticles - Rare earths - Tumors

Uncontrolled terms:Biological imaging - Biological technology - Disease diagnosis - Imaging technology - Luminescent mechanism - Photon scattering - Surface Functionalization - Water solubilities

Classification code:461 Bioengineering and Biology - 746 Imaging Techniques - 761 Nanotechnology - 804.2 Inorganic Compounds - 933 Solid State Physics

DOI:10.1177/0885328220924540

Funding details: Number: No.61475189, Acronym: NSFC;NNSF;NNSFC, Sponsor: National Natural Science Foundation of China;Number: No.619350061, Acronym: NSFC;NNSF;NNSFC, Sponsor: National Natural Science Foundation of China;

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201308337246

Title:Transparent and hydrophobic hexylene-bridged polymethylsiloxane/sio2 composite coating with tunable refractive index and its application for broadband antireflection

Authors:Zhang, Ce (1); Xu, Yao (2)

Author affiliation:(1) Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology, Institute of Frontier Science and Technology Transfer, Shaanxi University of Science & Technology, Xi'an; 710021, China; (2) Xi’ an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China

Corresponding author:Xu, Yao(xuyao@opt.ac.cn)

Source title:Thin Solid Films

Abbreviated source title:Thin Solid Films

Volume:701

Issue date:1 May 2020

Publication year:2020

Article number:137944

Language:English

ISSN:00406090

CODEN:THSFAP

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:Regulating refractive index over a wide range plays a key role in the design and fabrication of broadband antireflective coating in many optical energy-related fields. In this paper, hydrophobic refractive-tunable coating was fabricated from an effective solution mixing method starting from a synthesis solution of silica (SiO2) nanoparticles which was developed for dispersing nanoparticles into dense hexylene-bridged polymethylsiloxane polymer. In the mixing process, the microstructure and chemical structure of hexylene-bridged polymethylsiloxane/SiO2 were analyzed by fourier transform-infrared spectrometer and transmission electron microscope. Specially, the relationship between the microstructure and optical properties was also well investigated. Silica nanoparticles were dispersed homogeneously in polymer matrix modulating the refractive index of composite coating ranging from 1.16 to 1.47. When the composite coating with refractive index of 1.36 was used as the bottom layer and hexamethyldisilazane modified SiO2 coating with refractive index of 1.16 was used as the top layer. Thus-obtained double-layer broadband antireflective coating was fabricated with excellent broadband antireflective performance. In addition, the double-layer broadband silica antireflective coating showed good environmental stability. This work provides an alternative way to prepare a broadband antireflective coating for some applications in energy harvesting and optical devices.

© 2020 Elsevier B.V.

Number of references:37

Main heading:Refractive index

Controlled terms:Antireflection coatings - Chemical analysis - Composite coatings - Energy harvesting - Fourier transform infrared spectroscopy - Hydrophobicity - Microstructure - Mixing - Nanoparticles - Plastic coatings - Polymer matrix composites - Silica - Silica nanoparticles - Silicon oxides - SiO2 nanoparticles - Synthesis (chemical) - Transmission electron microscopy

Uncontrolled terms:Anti reflective coatings - Broadband anti reflections - Effective solution - Environmental stability - Fourier transform infrared spectrometer - Hexamethyldisilazane - Polymethylsiloxanes - Synthesis solution

Classification code:525.5 Energy Conversion Issues - 741.1 Light/Optics - 761 Nanotechnology - 801 Chemistry - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 813.2 Coating Materials - 815.1 Polymeric Materials - 931.2 Physical Properties of Gases, Liquids and Solids - 933 Solid State Physics - 951 Materials Science

DOI:10.1016/j.tsf.2020.137944

Funding details: Number: 2018JQ5089, Acronym: -, Sponsor: -;Number: 2016BJ-46, Acronym: -, Sponsor: -;Number: 11904220, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:The work was supported by the Natural Science Basic Research Program of Shaanxi (No. 2018JQ5089) and National Natural Science Foundation of China (No. 51803111 and 11904220), and Natural Science Research Fund of Shaanxi University of Science & Technology (No. 2016BJ-46).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5882244

Title:Effect of OH emission on the temperature and wind measurements derived from limb-viewing observations of the 1.27 μm O2 dayglow

Authors:Wu, Kuijun (1); He, Weiwei (2); Feng, Yutao (3); Xiong, Yuanhui (1); Li, Faquan (1)

Author affiliation:(1) State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan National Laboratory for Optoelectronics, Wuhan; 430071, China; (2) City College, Wuhan University of Science and Technology, Wuhan, Hubei; 430083, China; (3) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Wu, Kuijun(wukuijun@wipm.ac.cn)

Source title:Atmospheric Measurement Techniques

Abbreviated source title:Atmos. Meas. Tech.

Volume:13

Issue:4

Issue date:April 8, 2020

Publication year:2020

Pages:1817-1824

Language:English

ISSN:18671381

E-ISSN:18678548

Document type:Journal article (JA)

Publisher:Copernicus GmbH

Abstract:The O2(a1δg) emission near 1.27 μm is well-suited for remote sensing of global wind and temperature in near-space by limb-viewing observations to its bright signal and extended altitude coverage. However, vibrational-rotational emission lines of the O2. The main goal of this paper is to discuss the effect of OH emission on the wind and temperature measurements derived from the 1.27 O2 dayglow limb-viewing observations. The O2 dayglow and OH dayglow spectrum over the spectral region and altitude range of interest is calculated by using the line-by-line radiative transfer model and the most recent photochemical model. The method of four-point sampling of the interferogram and sample results of measurement simulations are provided for both <span classCombining double low line"inline-formula O2 dayglow and OH dayglow. It is apparent from the simulations that the presence of OH dayglow as an interfering species decreases the wind and temperature accuracy at all altitudes, but this effect can be reduced considerably by improving OH dayglow knowledge.

© 2020 Author(s).

Number of references:14

Controlled terms:accuracy assessment - hydroxide - numerical model - oxygen - photochemistry - radiative transfer - remote sensing - simulation - vibration

Classification code:71.7.1 Instrumentation

DOI:10.5194/amt-13-1817-2020

Funding details: Number: 41975039, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 61705253, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This research has been supported by the National Natural Science Foundation of China (NSFC) (grant nos. 41975039 and 61705253) and the National Key R&D Program of China (grant no. 2017YFC0211900).

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009606065

Title:Nonlocal Graph Convolutional Networks for Hyperspectral Image Classification????(Open Access)

Authors:Mou, Lichao (1); Lu, Xiaoqiang (2); Li, Xuelong (3); Zhu, Xiao Xiang (1)

Author affiliation:(1) Remote Sensing Technology Institute (IMF), German Aerospace Center (DLR), Wessling; 82234, Germany; (2) Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) School of Computer Science, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China

Corresponding author:Zhu, Xiao Xiang(xiaoxiang.zhu@dlr.de)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:12

Issue date:December 2020

Publication year:2020

Pages:8246-8257

Article number:9091940

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Over the past few years making use of deep networks, including convolutional neural networks (CNNs) and recurrent neural networks (RNNs), classifying hyperspectral images has progressed significantly and gained increasing attention. In spite of being successful, these networks need an adequate supply of labeled training instances for supervised learning, which, however, is quite costly to collect. On the other hand, unlabeled data can be accessed in almost arbitrary amounts. Hence it would be conceptually of great interest to explore networks that are able to exploit labeled and unlabeled data simultaneously for hyperspectral image classification. In this article, we propose a novel graph-based semisupervised network called nonlocal graph convolutional network (nonlocal GCN). Unlike existing CNNs and RNNs that receive pixels or patches of a hyperspectral image as inputs, this network takes the whole image (including both labeled and unlabeled data) in. More specifically, a nonlocal graph is first calculated. Given this graph representation, a couple of graph convolutional layers are used to extract features. Finally, the semisupervised learning of the network is done by using a cross-entropy error over all labeled instances. Note that the nonlocal GCN is end-to-end trainable. We demonstrate in extensive experiments that compared with state-of-the-art spectral classifiers and spectral-spatial classification networks, the nonlocal GCN is able to offer competitive results and high-quality classification maps (with fine boundaries and without noisy scattered points of misclassification).

© 1980-2012 IEEE.

Number of references:56

Main heading:Recurrent neural networks

Controlled terms:Convolution - Convolutional neural networks - Graphic methods - Image classification - Spectroscopy - Supervised learning

Uncontrolled terms:Convolutional networks - Graph representation - Labeled and unlabeled data - Misclassifications - Recurrent neural network (RNNs) - Scattered points - Spectral classifier - Spectral-spatial classification

Classification code:716.1 Information Theory and Signal Processing

DOI:10.1109/TGRS.2020.2973363

Funding details: Number: ERC-2016-StG-714087, Acronym: H2020, Sponsor: Horizon 2020 Framework Programme;Number: -, Acronym: ERC, Sponsor: European Research Council;Number: -, Acronym: -, Sponsor: Helmholtz Association;

Funding text:Manuscript received July 16, 2019; revised November 21, 2019; accepted December 9, 2019. Date of publication May 12, 2020; date of current version November 24, 2020. This work was supported in part by the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Programme (So2Sat) under Grant ERC-2016-StG-714087, and in part by the Helmholtz Association through the Framework of Helmholtz Artificial Intelligence Cooperation Unit (HAICU) - Local Unit "Munich Unit @Aeronautics, Space and Transport (MASTr)" and Helmholtz Excellent Professorship "Data Science in Earth Observation - Big Data Fusion for Urban Research." (Corresponding author: Xiao Xiang Zhu.) Lichao Mou and Xiao Xiang Zhu are with Remote Sensing Technology Institute (IMF), German Aerospace Center (DLR), Wessling 82234, Germany, and also with Signal Processing in Earth Observation (SiPEO), Technical University of Munich (TUM), Munich 80333, Germany (e-mail: lichao.mou@dlr.de; xiaoxiang.zhu@dlr.de).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20202108691276

Title:Learning blur invariant binary descriptor for face recognition

Authors:Zhao, Chen (1, 2); Li, Xuelong (3); Dong, Yongsheng (3)

Author affiliation:(1) Yhe Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China

Corresponding author:Dong, Yongsheng(dongyongsheng98@163.com)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:404

Issue date:3 September 2020

Publication year:2020

Pages:34-40

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:Binary representations have demonstrated remarkable performance in face recognition for its robustness to local changes and computation efficiency. However, the performance of face recognition based on most binary descriptors are not satisfactory when dealing with blurred face images. To solve this problem, we propose a novel blur invariant binary descriptor for face recognition. Particularly, we maximize the correlation between the binary codes of sharp face images and blurred face images of positive image pairs for learning the projection matrix. After that, we use the learned projection matrix to obtain blur-robust binary codes by quantizing projected pixel difference vectors (PDVs) in the testing stage. Experiment results on FERET and CMU-PIE show that our method achieves better recognition performance than representative binary descriptors LBP and CBFD.

© 2020 Elsevier B.V.

Number of references:42

Main heading:Face recognition

Controlled terms:Binary codes

Uncontrolled terms:Binary representations - Blur invariants - Computation efficiency - Descriptors - Difference vectors - Face images - Image pairs - Projection matrix

Classification code:723.1 Computer Programming

DOI:10.1016/j.neucom.2020.04.082

Funding details: Number: 19HASTIT026, Acronym: -, Sponsor: Henan Province University Innovation Talents Support Program;Number: 2017GGJS065, Acronym: -, Sponsor: -;Number: 192102210121, Acronym: -, Sponsor: -;Number: 61871470, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported in part by the National Natural Science Foundation of China under Grants 61871470 and U1801262, in part by the Key Specialized Research and Development Breakthrough of Henan Province under Grant 192102210121, in part by the Program for Science and Technology Innovation Talents in Universities of Henan Province under Grant 19HASTIT026, and in part by the Training Program for the Young-Backbone Teachers in Universities of Henan Province under Grant 2017GGJS065.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203008964215

Title:Induced Photon Correlations Through the Overlap of Two Four-Wave Mixing Processes in Integrated Cavities????(Open Access)

Authors:Zhang, Yanbing (1); Kues, Michael (2, 3); Roztocki, Piotr (1); Reimer, Christian (1, 4); Fischer, Bennet (1); MacLellan, Benjamin (1); Bisianov, Arstan (5); Peschel, Ulf (5); Little, Brent E. (6); Chu, Sai T. (7); Moss, David J. (8); Caspani, Lucia (9); Morandotti, Roberto (1, 10)

Author affiliation:(1) Énergie Matériaux Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (2) Hannover Center for Optical Technologies, Leibniz University Hannover, Nienburger Str. 17, Hannover; 30167, Germany; (3) Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering–Innovation Across Disciplines), Leibniz University Hannover, Hannover, Germany; (4) HyperLight Corporation, 501 Massachusetts Avenue, Cambridge; MA; 02139, United States; (5) Institute of Solid State Physics and Optics, Abbe Center of Photonics, Friedrich Schiller University Jena, Max-Wien-Platz 1, Jena; 07743, Germany; (6) State Key Laboratory of Transient Optics and Photonic Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (7) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong, China; (8) Centre for Micro Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (9) Institute of Photonics, Department of Physics, University of Strathclyde, Glasgow; G1 1RD, United Kingdom; (10) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; Sichuan; 610054, China

Corresponding author:Morandotti, Roberto(morandotti@emt.inrs.caemailmichael.kues@hot.uni-hannover.deemailmichael.kues@hot.uni-hannover.deemailmorandotti@emt.inrs.ca)Kues, Michael(michael.kues@hot.uni-hannover.deemailmichael.kues@hot.uni-hannover.deemailmorandotti@emt.inrs.ca)Kues, Michael(michael.kues@hot.uni-hannover.deemailmorandotti@emt.inrs.ca)Morandotti, Roberto(morandotti@emt.inrs.ca)

Source title:Laser and Photonics Reviews

Abbreviated source title:Laser Photon. Rev.

Volume:14

Issue:9

Issue date:September 1, 2020

Publication year:2020

Article number:2000128

Language:English

ISSN:18638880

E-ISSN:18638899

Document type:Journal article (JA)

Publisher:Wiley-VCH Verlag

Abstract:Induced photon correlations are directly demonstrated by exploring two coupled nonlinear processes in an integrated device. Using orthogonally polarized modes within an integrated microring cavity, phase matching of two different nonlinear four-wave mixing processes is achieved simultaneously, wherein both processes share one target frequency mode, while their other frequency modes differ. The overlap of these modes leads to the coupling of both nonlinear processes, producing photon correlations. The nature of this process is confirmed by means of time- and power-dependent photon correlation measurements. These findings are relevant to the fundamental understanding of spontaneous parametric effects as well as single-photon-induced processes, and their effect on optical quantum state generation and control.

© 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Number of references:36

Main heading:Two photon processes

Controlled terms:Four wave mixing - Particle beams - Phase matching - Photons - Quantum optics

Uncontrolled terms:Four-wave-mixing process - Integrated device - Microring cavities - Orthogonally polarized modes - Parametric effects - Photon correlation - Quantum state generation - Target frequencies

Classification code:713 Electronic Circuits - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics - 932.1 High Energy Physics

DOI:10.1002/lpor.202000128

Funding details: Number: PIOF‐GA‐2013‐625466, Acronym: -, Sponsor: -;Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: RGS?R1?191426, Acronym: -, Sponsor: Royal Society;Number: DP150104327, Acronym: ARC, Sponsor: Australian Research Council;Number: -, Acronym: -, Sponsor: Canada Research Chairs;Number: XDB24030000, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: B3655793, Acronym: FRQNT, Sponsor: Fonds de recherche du Québec – Nature et technologies;

Funding text:The authors wish to acknowledge the following funding: Canada Research Chairs; Minist?re de l'?conomie, de la Science et de l'Innovation (MESI) Qu?bec; Natural Sciences and Engineering Research Council of Canada (NSERC); Fonds de recherche du Qu?bec?Nature et technologies (FRQNT) (B3655793); German federal ministry of education and research, Quantum Futur Program (PQuMAL); European Union's FP7 Programme (PIOF-GA-2013-625466); Australian Research Council (ARC) (DP150104327); Strategic Priority Research Program of the Chinese Academy of Sciences, under Grant No. XDB24030000; Royal Society Research Grants (RGS?R1?191426). R.M. is affiliated to 10 as an adjoint faculty.The authors wish to acknowledge the following funding: Canada Research Chairs; Ministère de l'Économie, de la Science et de l'Innovation (MESI) Québec; Natural Sciences and Engineering Research Council of Canada (NSERC); Fonds de recherche du Québec—Nature et technologies (FRQNT) (B3655793); German federal ministry of education and research, Quantum Futur Program (PQuMAL); European Union's FP7 Programme (PIOF‐GA‐2013‐625466); Australian Research Council (ARC) (DP150104327); Strategic Priority Research Program of the Chinese Academy of Sciences, under Grant No. XDB24030000; Royal Society Research Grants (RGS∖R1∖191426). R.M. is affiliated to 10 as an adjoint faculty.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Hybrid Gold, Green

Accession number:20202108693870

Title:Design of a femtosecond electron diffractometer with adjustable gaps????(Open Access)

Title of translation:超紧凑型飞秒电子衍射仪的设计????(Open Access)

Authors:Luo, Duan (1, 2, 3); Hui, Dan-Dan (1, 2); Wen, Wen-Long (1); Li, Li-Li (1, 2, 3); Xin, Li-Wei (1); Zhong, Zi-Yuan (1, 2, 3); Ji, Chao (1, 2, 3); Chen, Ping (1); He, Kai (1); Wang, Xing (1); Tian, Jin-Shou (1, 3)

Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China

Corresponding author:Wang, Xing(wangxing@opt.ac.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:69

Issue:5

Issue date:March 5, 2020

Publication year:2020

Article number:052901

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences

Abstract:One of the grand challenges in ultrafast science is real-time visualization of the microscopic structural evolution on atomic time and length scales. A promising pump-probe technique using a femtosecond laser pulse to initiate the ultrafast dynamics and another ultrashort electron pulse to probe the resulting changes has been developed and widely used to study ultrafast structural dynamics in chemical reactions, phase transitions, charge density waves, and even biological functions. In the past three decades, a number of different ultrafast electron guns have been developed to generate ultashort electron sources, mainly including hybrid electron gun with radio-frequency (RF) cavities for compressing the pulse broadening, relativistic electron gun for suppressing the coulomb interaction, single-electron pulses without space charge effect and compact direct current (DC) electron gun for minimizing the electron propagation distance. At present, these developments with different final electron energy and available total charge have improved the time response of ultrafast electron diffraction (UED) setups to a new frontier approaching to 100 fs regime. Although enormous efforts have been made, the superior capabilities and potentials of ultrafast electron diffraction (UED) are still hindered by space-charge induced pulse broadening. Besides, the penetration depth of electrons increases with the electron energy, while the scattering probability of electrons has the opposite consequence. Thus, in addition to the temporal resolution enhancement, it is also important that the electron energy should be tunable in a wide range to meet the requirements for samples with different thickness. Here in this work, we design a novel ultra-compact electron gun which combines a well-designed cathode profile, thereby providing a uniform field and a movable anode configuration to achieve a temporal resolution on the order of 100 fs over an accelerating voltage range from 10 kV to 125 kV. By optimizing the design of the high-voltage electrode profile, the field enhancement factor on the axis and along the cathode surface are both less than ~4% at different cathode-anode spacings, and thus the maximum on-axis field strength of ~10 MV/m is achieved under various accelerating voltages. This effectively suppresses the space charge broadening effect of the electron pulse. Furthermore, the anode aperture is designed as a stepped hole in which the dense sample grid can be placed, and the sample under study is directly supported by the grid and located at the anode, which reduces the cathode-to-sample distance, thus minimizing the electron pulse broadening from the cathode to sample. Moreover, the defocusing effect caused by the anode hole on the electron beam can be effectively reduced, therefore improving the lateral focusing performance of the electron beam.

© 2020 Chinese Physical Society.

Number of references:22

Main heading:Electrons

Controlled terms:Anodes - Biology - Cathodes - Charge density - Charge density waves - Dissociation - Electric space charge - Electron beams - Electron diffraction - Electron energy levels - Electron guns - HVDC power transmission - Laser pulses - Optical pumping - Structural dynamics

Uncontrolled terms:Accelerating voltages - Electron pulse broadening - Field enhancement factor - High voltage electrodes - Real time visualization - Relativistic electron - Scattering probabilities - Ultrafast electron diffraction

Classification code:408 Structural Design - 461.9 Biology - 701.1 Electricity: Basic Concepts and Phenomena - 706.1.1 Electric Power Transmission - 714.1 Electron Tubes - 744.1 Lasers, General - 802.2 Chemical Reactions

Numerical data indexing:Time 1.00e-13s, Voltage 1.00e+04V to 1.25e+05V

DOI:10.7498/aps.69.20191157

Funding details: Number: 11805267,11805267,71705255,71705255, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Young Scientists Fund;

Funding text:* Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant Nos. 11805267, 71705255). † Corresponding author. E-mail: wangxing@opt.ac.cn ‡ Corresponding author. E-mail: tianjs@opt.ac.cnProject supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant Nos. 11805267,71705255).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Hybrid Gold

Accession number:20202808913733

Title:Development of the Control System of High Speed Synchronous Rotating Mirror for Space Laser Ranging

Authors:Haitao, Wang (1, 4); Yu, Cao (1, 2, 3, 4, 5); Xiong, Gao (1, 4); Xin, Zhang (1, 4); Junfeng, Han (1, 3, 4); Meilin, Xie (1, 4); Peng, Liu (1, 3, 4); Feng, Jing (1, 3, 4)

Author affiliation:(1) Xi'an Institute of Optics and Precision, Mechanics of CAS, Xi'an; 710119, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China; (5) Collaborative Innovation, Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi; 030006, China

Source title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Abbreviated source title:IEEE Int. Conf. Electron. Technol., ICET

Part number:1 of 1

Issue title:2020 IEEE 3rd International Conference on Electronics Technology, ICET 2020

Issue date:May 2020

Publication year:2020

Pages:194-198

Article number:9119699

Language:English

ISBN-13:9781728162836

Document type:Conference article (CA)

Conference name:3rd IEEE International Conference on Electronics Technology, ICET 2020

Conference date:May 8, 2020 - May 12, 2020

Conference location:Chengdu, China

Conference code:161271

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:With the development of space technology and aerospace industry, space distance measurement has become an important research content in space field. The traditional radar ranging is easily interfered by space high-energy particles and electromagnetic waves in space, and the measurement accuracy is low, which cannot meet the requirements of high-precision measurement. The air in the space is thin and the temperature changes violently, so it is impossible to carry out acoustic ranging with super measurement accuracy. Laser ranging technology is an automatic non-contact measurement method, which is not sensitive to electromagnetic interference, has strong anti-interference ability and high measurement accuracy. Compared with the general optical ranging technology, it has the advantages of convenient operation, simple system and allday working. Compared with radar ranging, laser ranging has strong anti-interference ability and high precision. In this paper, a high-speed synchronous rotating mirror system is developed to meet the requirements of the splitting of the transmitting and receiving optical paths in laser ranging. It is installed in the optical path of the large-scale laser ranging system, driving the mirror body to rotate stably and at high speed, realizing the splitting of the optical path and generating the pulse signal synchronous with the mirror body position to send to the laser, which is used for the timing of launching the synchronous laser machine. Finally, through the experimental test, when the speed reaches 3000 rpm, the peak speed error is less than 1rmpPP, the mirror shake amount is 15.56 , and the equipment vibration is 8.9 μ m, which meets the needs of the scheme[10].

© 2020 IEEE.

Number of references:12

Main heading:Laser mirrors

Controlled terms:Aerospace industry - Electromagnetic pulse - Optical testing - Radar measurement - Space-based radar - Speed

Uncontrolled terms:Anti-interference - High-energy particles - High-precision measurement - Large scale lasers - Measurement accuracy - Noncontact measurements - Space technologies - Temperature changes

Classification code:701 Electricity and Magnetism - 716.2 Radar Systems and Equipment - 741.3 Optical Devices and Systems

Numerical data indexing:Rotational_Speed 3.00e+03RPM

DOI:10.1109/ICET49382.2020.9119699

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203309036239

Title:Combining competitive sequestration with nonlinear hybridization chain reaction amplification: an ultra-specific and highly sensitive sensing strategy for single-nucleotide variants

Authors:Zhao, Yan (1); Feng, Yuanbo (1); Zhang, Yuanbo (1); Xia, Pu (2); Xiao, Zihan (3); Wang, Ziheng (3); Yan, Hongxia (1)

Author affiliation:(1) MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, School of Science, Northwestern Polytechnical University, Xi'an; 710129, China; (2) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Queen Mary University of London Engineering School, NPU, Northwestern Polytechnical University, Xi'an; 710129, China

Corresponding author:Zhao, Yan(zhaoyan@nwpu.edu.cnemailhongxiayan@nwpu.edu.cn)Yan, Hongxia(hongxiayan@nwpu.edu.cn)

Source title:Analytica Chimica Acta

Abbreviated source title:Anal. Chim. Acta

Volume:1130

Issue date:15 September 2020

Publication year:2020

Pages:107-116

Language:English

ISSN:00032670

E-ISSN:18734324

CODEN:ACACAM

Document type:Journal article (JA)

Publisher:Elsevier B.V.

Abstract:Highly specific and sensitive detection of single-nucleotide variants (SNVs) is of central importance in disease diagnosis and pharmacogenomics. However, it remains a great challenge to successfully detect very low amounts of mutant SNV sequences in real samples in which a SNV sequence may be surrounded by high levels of closely related wild-type sequences. Herein, we propose an ultra-specific and highly sensitive SNV sensing strategy by combining the competitive sequestration with the nonlinear hybridization chain reaction (HCR) amplification. The rationally designed sequestration hairpin can effectively sequester the large amount of wild-type sequence and thus dramatically improve the hybridization specificity in recognizing SNVs. To improve the detection sensitivity, a new fluorescent signal probe is fabricated by intercalating SYBR Green I dye into the nonlinear HCR based DNA dendrimer to further bind with SNVs for signal amplification. The hyperbranched DNA dendrimer possesses large numbers of DNA duplexes for dye intercalation, thus the signal probe shows strong fluorescence intensity, leading to large fluorescence signal amplification. Taking advantage of the improved hybridization specificity of the competitive sequestration and the enhanced fluorescence response of the nonlinear HCR amplification, the developed sensing strategy enables ultra-specific and highly sensitive detection of SNVs. Taking human pancreatic cancers and colorectal carcinomas related KRAS gene mutations as models, the developed strategy shows remarkably high specificity against 17 SNVs (discrimination factors ranged from 126 to 1001 with a median of 310), and achieves high sensitivity for 6 KRAS mutations (the best resultant detection limit reached 15 pM for KRAS G13D (c.38G > A)). Notably, combined with PCR amplification, our SNV sensing strategy could detect KRAS G12D (c.35G > A) from extracted human genomic DNA samples at abundance as low as 0.05%. This work expands the rule set of designing specific and sensitive SNV sensing strategies and shows promising potential application in clinical diagnosis.

© 2020 Elsevier B.V.

Number of references:52

Main heading:Amplification

Controlled terms:Dendrimers - Diagnosis - DNA - Fluorescence - Green manufacturing - Nucleotides - Polymerase chain reaction - Probes

Uncontrolled terms:Detection sensitivity - Enhanced fluorescence - Fluorescence intensities - Fluorescence signal amplification - Fluorescent signals - Highly sensitive detections - Hybridization chain reactions - Signal amplifications

Classification code:461 Bioengineering and Biology - 741.1 Light/Optics - 801.2 Biochemistry

Numerical data indexing:Percentage 5.00e-02%

DOI:10.1016/j.aca.2020.07.022

Funding details: Number: 31020180QD048, Acronym: NPU, Sponsor: Northwestern Polytechnical University;Number: 2019JQ-343, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019B030301003, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B23, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work was financially supported by the Natural Science Basic Research Plan in Shaanxi Province of China ( 2019JQ-343 ), Initial Scientific Research Fund of Northwestern Polytechnical University ( 31020180QD048 ), West Light Foundation of the Chinese Academy of Sciences ( XAB2017B23 ), Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology and Open Fund of Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates ( 2019B030301003 ). And we would like to thank the Analytical & Testing Center of Northwestern Polytechnical University for SEM and AFM testing.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20195007823189

Title:Structured active fiber fabrication and characterization of a chemically high-purified Dy3+-doped chalcogenide glass

Authors:Xiao, Xusheng (1); Xu, Yantao (1, 2); Cui, Jian (1, 2); Liu, Xiaogang (1); Cui, Xiaoxia (1, 2); Wang, Xunsi (3); Dai, Shixun (3); Guo, Haitao (1, 2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an; Shaanxi, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences (UCAS), Beijing, China; (3) Key Laboratory of Optoelectronic Functional Materials and Device of Zhejiang Province, Ningbo University, Ningbo, China

Corresponding author:Guo, Haitao(guoht_001@opt.ac.cn)

Source title:Journal of the American Ceramic Society

Abbreviated source title:J Am Ceram Soc

Volume:103

Issue:4

Issue date:April 1, 2020

Publication year:2020

Pages:2432-2442

Language:English

ISSN:00027820

E-ISSN:15512916

CODEN:JACTAW

Document type:Journal article (JA)

Publisher:Blackwell Publishing Inc.

Abstract:By conventional melt-quenching techniques, a series of Dy3+-doped (0.1 to 1.0 wt%) Ga5Ge20Sb15S60 bulk glasses were fabricated and their potential for developing mid-infrared fiber laser beyond 4 μm were evaluated, in which the optimal Dy3+ doping concentration was found to be 0.3 wt% and the largest laser quality factor value (σe × τmea = 2.62 × 10−23 cm2 s) among all of the Dy3+-doped chalcogenide glass was obtained. On this basis, through using the chemical purification methods with chlorine gas combined with the dynamic distillation process, the high-purity GGSS glasses with low O–H and S–H absorptions were successfully fabricated, which was confirmed by the optimized mid-infrared linear transmittance and improved fluorescent lifetimes of Dy3+: 6H13/2, 6H11/2 levels. Furthermore, for the first time to the best of our knowledge, the Dy3+-doped, single-mode, and double-cladding chalcogenide fibers with the core/cladding ratios of 125:60:11 and 125:66:11.5 were achieved by a multistage rod-in-tube fiber drawing process and extrusion methods, respectively. The GeS2-based fiber exhibits excellent transmission performance at 1.0-5.0 μm: 3.0 dB/m at 2.9 μm (O–H), 2.4 dB/m at 4.1 μm (S–H). Combining the advantages of high-purity, high doping concentration and single-mode double-cladding structure, the optimized active fiber should be an ideal efficient and low-threshold medium toward mid-infrared fiber laser beyond 4 μm.

© 2019 The American Ceramic Society

Number of references:45

Main heading:Glass

Controlled terms:Air purification - Antimony compounds - Chalcogenides - Distillation - Fabrication - Fiber lasers - Fibers - Fluorescence - Gallium compounds - Germanium compounds - Infrared devices - Optical fibers

Uncontrolled terms:Chemical purification - Distillation process - Doping concentration - Fabrication and characterizations - Melt quenching techniques - Midinfrared - Single mode - Transmission performance

Classification code:643 Space Heating, Ventilation and Air Conditioning - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744.4 Solid State Lasers - 802.3 Chemical Operations - 804.2 Inorganic Compounds - 812.3 Glass

DOI:10.1111/jace.16921

Funding details: Number: 2019JM‐113, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2018M633603, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: JCTD‐2018‐19, Acronym: -, Sponsor: -;Number: 61475189, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was financially supported by the National Natural Science Foundation of China (Nos. 61935006, 61475189), CAS Interdisciplinary Innovation Team project (JCTD‐2018‐19), China Postdoctoral Science Foundation (Grant No. 2018M633603), and the Natural Science Basic Research Project in Shaanxi Province (2019JM‐113, 2019JQ‐236).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203409068416

Title:Supervised deep hashing with a joint deep network

Authors:Chen, Yaxiong (1, 2); Lu, Xiaoqiang (1); Li, Xuelong (3)

Author affiliation:(1) the Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) the University of Chinese Academy of Sciences, Beijing; 100049, China; (3) the School of Computer Science and Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an; 710072, China

Corresponding author:Lu, Xiaoqiang(luxiaoqiang@opt.ac.cn)

Source title:Pattern Recognition

Abbreviated source title:Pattern Recogn.

Volume:105

Issue date:September 2020

Publication year:2020

Article number:107368

Language:English

ISSN:00313203

CODEN:PTNRA8

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:Hashing has gained great attention in large-scale image retrieval due to efficient storage and fast search. Recently, many deep hashing approaches have achieved good results since deep neural network owns powerful learning capability. However, these deep hashing approaches can perform deep features learning and binary-like codes learning synchronously, the information loss between binary-like codes and binary codes will increase due to the binarization operation. A further deficiency is that binary-like codes learning based on deep feature representations is a shallow learning procedure, which cannot fully exploit deep feature representations to generate hash codes. To solve the above problems, we propose a Deep Learning Supervised Hashing (DLSH) method which adopts deep structure to learn binary codes based on deep feature representations for large-scale image retrieval. Specifically, we integrate deep features learning module, deep mapping module and binary codes learning module in one unified architecture. The network is trained in an end-to-end way. In addition, a new objective function is designed to preserve the balancing property and semantic similarity of binary codes by incorporating the semantic similarity term and the balanceable property term. Experimental results on four benchmarks demonstrate that the proposed approach outperforms several state-of-the-art hashing methods.

© 2020

Number of references:50

Main heading:Deep learning

Controlled terms:Binary codes - Computer architecture - Deep neural networks - Hash functions - Image retrieval - Semantics

Uncontrolled terms:Feature representation - Learning capabilities - Learning modules - Learning procedures - Objective functions - Semantic similarity - State of the art - Unified architecture

Classification code:723.1 Computer Programming

DOI:10.1016/j.patcog.2020.107368

Funding details: Number: 61925112, Acronym: -, Sponsor: China National Funds for Distinguished Young Scientists;Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: QYZDB-SSW-JSC015, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2017B15, Acronym: -, Sponsor: -;Number: 61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:We thank the anonymous reviewers for their feedback and helpful suggestions. This work was supported in part by the China National Funds for Distinguished Young Scientists under Grant 61925112 , in part by the National Natural Science Foundation of China under Grant 61772510 , in part by the Young Top-notch Talent Program of Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015 , in part by the National Key Research and Development Program of China under Grant 2017YFB0502900 , and in part by the CAS Light of West China Program under Grant XAB2017B15.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009602489

Title:Research and application of spectral reconstruction technology based on periodic structure

Authors:Liu, Bin (1, 2); Wei, Ru Yi (1, 3); Shi, Yi Shi (2, 3); Shi, Lei (1, 2); Zhang, Zai Kun (1, 2); Zhao, Lv Rong (1, 2); Zhang, Xin Ming (1, 2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an Hi-Tech Industrial Development Zone, NO.17 Xinxi Road, New Industrial Park, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, No.19(A)Yuquan Road, Shijingshan District, Beijing; 100049, China; (3) Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11567

Part number:1 of 1

Issue title:AOPC 2020: Optical Sensing and Imaging Technology

Issue date:2020

Publication year:2020

Article number:115671R

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639553

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Sensing and Imaging Technology, AOPC 2020

Conference date:August 25, 2020 - August 27, 2020

Conference location:Xiamen, China

Conference code:165074

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:With the progress of science and the development of society, the study of material composition becomes more and more important, and the identification of material composition is mainly to distinguish the spectral information of different substances. Spectrometer is an important optical instrument, which combines the optical method with modern electronic data processing technology, and accurately analyzes the structure, composition and content of the target substance by obtaining its spectral information. At present, it has been widely used in some important scientific fields such as field exploration, material detection and space-borne analysis. In this paper, a new type of spectrometer based on periodic array structure is proposed. The spectrometer modulates the phase of the incident light by using the small hole array structure with the diameter of sub-wavelength. By using the diffraction effect of light, the light intensity distribution of the incident light is directly recorded by Charge Coupled Device1/4 CCD1/4according to different wavelengths. After passing through the diffraction aperture array, the light intensity distribution is recorded again, and the transmittance coefficients of the diffraction aperture array for different wavelengths are obtained respectively. Finally, the transmittance matrix of diffraction aperture array for incident light is obtained, and the spectral curves of different incident light can be obtained by data processing algorithm according to the transmittance matrix. The main optical device of the spectrometer is diffraction aperture array, which is a metal film coated on a transparent substrate made of resin material. A series of aperture arrays with diameters of 2-78 microns and 10*10 are processed on the metal film by micro-nano processing technology. Any aperture has different diameters, and the apertures are periodically arranged on the metal film. By using diffraction effect, the incident light with different wavelengths will produce different light intensity distribution on CCD. Combined with data processing method, the incident light can be obtained. Compared with the traditional spectrometer, the new spectrometer has no moving parts in the system, which improves its stability, and has the characteristics of fast data processing, small size, low cost and high spectral resolution. In this paper, the theoretical analysis, simulation and experimental verification of the new spectrometer are carried out. The results show that the new spectrometer has obvious advantages compared with the traditional spectrometer and has broad application prospects.

© 2020 SPIE.

Number of references:8

Main heading:Light

Controlled terms:Data handling - Diffraction - Imaging techniques - Matrix algebra - Metallic films - Periodic structures - Spectral resolution - Spectrometers

Uncontrolled terms:Data processing algorithms - Electronic data processing - High spectral resolution - Light intensity distribution - Research and application - Simulation and experimental verifications - Spectral reconstruction - Transmittance coefficient

Classification code:723.2 Data Processing and Image Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques - 921.1 Algebra - 931.3 Atomic and Molecular Physics

DOI:10.1117/12.2579501

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20195207922532

Title:The laser-induced damage change detection for optical elements using siamese convolutional neural networks

Authors:Kou, Jingwei (1, 2); Zhan, Tao (3); Zhou, Deyun (1); Wang, Wei (2); Da, Zhengshang (2); Gong, Maoguo (3)

Author affiliation:(1) School of Electronics and Information, Northwestern Polytechnical University, No.127 West Youyi Road, Xi'an; 710072, China; (2) The Advanced Optical Instrument Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17 Xinxi Road, Xi'an; 710119, China; (3) Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education, Xidian University, No.2 South TaiBai Road, Xi'an; 710071, China

Corresponding author:Gong, Maoguo(gong@ieee.org)

Source title:Applied Soft Computing Journal

Abbreviated source title:Appl. Soft Comput. J.

Volume:87

Issue date:February 2020

Publication year:2020

Article number:106015

Language:English

ISSN:15684946

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:Due to the fact that weak and fake laser-induced damages may occur in the surface of optical elements in high-energy laser facilities, it is still a challenging issue to effectively detect the real laser-induced damage changes of optical elements in optical images. Different from the traditional methods, in this paper, we put forward a similarity metric optimization driven supervised learning model to perform the laser-induced damage change detection task. In the proposed model, an end-to-end siamese convolutional neural network is designed and trained which can integrate the difference image generating and difference image analysis into a whole network. Thus, the damage changes can be highlighted by the pre-trained siamese network that classifies the central pixel between input multi-temporal image patches into changed and unchanged classes. To address the problem of unbalanced distribution between positive and negative samples, a modified average frequency balancing based weighted softmax loss is used to train the proposed network. Experiments conducted on two real datasets demonstrate the effectiveness and superiority of the proposed model.

© 2019 Elsevier B.V.

Number of references:45

Main heading:Laser damage

Controlled terms:Convolution - Convolutional neural networks - Damage detection - Geometrical optics - High energy lasers

Uncontrolled terms:Average frequency - Change detection - Difference images - Multi-temporal image - Negative samples - Real data sets - Similarity metrics - Unbalanced distribution

Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 744.1 Lasers, General - 744.8 Laser Beam Interactions

DOI:10.1016/j.asoc.2019.106015

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205109634841

Title:Biomimetic curved compound-eye camera with a high resolution for the detection of distant moving objects

Authors:Xu, Huangrong (1, 2); Zhang, Yuanjie (1, 2); Wu, Dengshan (1); Zhang, Geng (1, 2); Wang, Ziyuan (1, 2); Feng, Xiangpeng (1); Hu, Bingliang (1, 2); Yu, Weixing (1, 2)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17, Xinxi Road, Xi’an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Yu, Weixing(yuwx@opt.ac.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:45

Issue:24

Issue date:December 15, 2020

Publication year:2020

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:In this Letter, we demonstrate the design and fabrication of a biomimetic curved compound-eye camera (BCCEC) with a high resolution for detecting distant moving objects purpose. In contrast to previously reported compound-eye cameras, our BCCEC has two distinct features. One is that the ommatidia of the compound eye are deployed on a curved surface which makes a large field of view (FOV) possible. The other is that each ommatidium has a relatively large optical entrance and long focal length so that a distant object can be imaged. To overcome the mismatch between the curved focal plane formed by the curved compound eye and the planar focal plane of the CMOS image sensor (CIS), an optical relay subsystem is introduced between the compound eye and the CIS. As a result, a BCCEC with 127 ommatidia in the compound eye is designed and fabricated to achieve a large FOV of up to 98◦ × 98◦. The experimental results show that objects with a size of 100 mm can be clearly resolved at a distance of 25 m. The capture of the motion trajectories of a moving object is also demonstrated, which makes it possible to detect and track the moving targets in a huge FOV for security surveillance purposes.

© 2020 Optical Society of America

Number of references:16

Main heading:Object detection

Controlled terms:Biomimetics - Cameras - Focusing

Uncontrolled terms:CMOS image sensor - Compound-eye camera - Curved surfaces - High resolution - Large field of views - Long focal lengths - Motion trajectories - Security surveillance

Classification code:461.8 Biotechnology - 723.2 Data Processing and Image Processing - 742.2 Photographic Equipment

Numerical data indexing:Size 1.00e-01m, Size 2.50e+01m

DOI:10.1364/OL.411492

Funding details: Number: 61475156,61975231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. National Natural Science Foundation of China (61475156, 61975231).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205109635259

Title:W-shaped common-path interferometer

Authors:Wei, Ruyi (1, 2, 3); Di, Lamei (1, 2, 3); Qiao, Nianzu (4); Chen, Shasha (1, 2)

Author affiliation:(1) CAS Key Laboratory of Spectral Imaging Technology, Xi’an; 710119, China; (2) Xi’an Institute of Optics and Precision Mechanic of Chinese Academy of Sciences, Xi’an; 710119, China; (3) University of Chinese Academy of Sciences, School of Optoelectronics, Beijing; 100049, China; (4) Tongji University, School of Electronic Information and Engineering, Shanghai; 201804, China

Corresponding author:Wei, Ruyi(ruyiwei@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:34

Issue date:December 1, 2020

Publication year:2020

Pages:10973-10979

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:We present a novel static W-shaped common-path interferometer. In particular, the W-shaped common-path corner-cube retroreflector interferometer (W-CPRI) is introduced via detailed analysis of its working principles and performance. It comprises two corner-cube retroreflectors (CCRs), a reflecting mirror (RM), and a beam splitter. For each interference output of an ideal W-CPRI, the two beams recombine and have the same output direction, including a tilted CCR. In a deformed W-CPRI structure, an optical path difference can be produced by inserting an optical element that changes the optical path in the interferometer arm of the W-CPRI. The posture deviations of the RM and the CCRs in the W-CPRI are analyzed. In addition, a proof-of-concept experiment is conducted, with the stability analyzed using the fringe similarity method. The average cosine similarity is 0.9953, revealing that this W-CPRI has high stability and strong coherence while avoiding the tilt and displacement of the interferometer arm.

© 2020 Optical Society of America

Number of references:21

Main heading:Interferometers

Controlled terms:Molecular physics - Optics

Uncontrolled terms:Common path - Common-path interferometers - Corner cube retro-reflectors - Cosine similarity - Optical path - Optical path difference - Proof of concept - Reflecting mirrors

Classification code:741.1 Light/Optics - 931.3 Atomic and Molecular Physics - 941.3 Optical Instruments

DOI:10.1364/AO.411150

Funding details: Number: 2016YFC0201102, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 11727806,11573058, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. National Natural Science Foundation of China (11573058, 11727806); National Key Research and Development Program of China (2016YFC0201102).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201208318712

Title:All-fiber spectral modulating device based on microfiber interferometer grown with tungsten disulfide

Authors:Luo, Meng (1); Yang, Xinghua (1); Teng, Pingping (1); Kong, Depeng (2); Liu, Zhihai (1); Gao, Danheng (1); Li, Zhanao (1); Wen, Xingyue (1); Yuan, Libo (1, 3); Li, Kang (4); Copner, Nigel (4)

Author affiliation:(1) Key Laboratory of In-Fiber Integrated Optics, Ministry of Education, College of Science, Harbin Engineering University, Harbin, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and precision Mechanic, Chinese Academy of Sciences, Xi’an, China; (3) Photonics Research Center, Guilin University of Electronics Technology, Guilin, China; (4) Faculty of Computing, Engineering & Science, Wireless & Optoelectronics Research & Innovation Centre, University of South Wales, Wales, United Kingdom

Corresponding author:Yang, Xinghua(yangxh@hrbeu.edu.cn)

Source title:Instrumentation Science and Technology

Abbreviated source title:Instrum Sci Technol

Volume:48

Issue:5

Issue date:September 2, 2020

Publication year:2020

Pages:505-517

Language:English

ISSN:10739149

E-ISSN:15256030

CODEN:ISCTEF

Document type:Journal article (JA)

Publisher:Bellwether Publishing, Ltd.

Abstract:Here an integrated compact low-cost all-fiber optical spectrum control device based on a single fiber interferometer and tungsten disulfide is reported. Tungsten disulfide was deposited onto the surface of the non-adiabatic microfiber under the application of the radiation from an amplified spontaneous emission source. Next, the near-infrared light (NIR), which leaked through the strong evanescent field of the microfiber, excited the surrounding tungsten disulfide and generated heat due to the photothermal effect. Therefore, the phase shift of the interference spectrum was caused by the surrounding change in the refractive index (RI). In the experimental work at 1550 nm, a spectral shift equal to 0.8 nm was obtained following the use of a pump laser operating at 980 nm. In addition, the device can may be used as an all-optical switch with a modulation depth of 18.1%. The proposed tungsten disulfide-based all-fiber device has potential application in all-optical signal controllable devices.

© 2020, © 2020 Taylor & Francis Group, LLC.

Number of references:23

Main heading:Tungsten compounds

Controlled terms:Evanescent fields - Infrared devices - Interferometers - Microfibers - Optical fibers - Pumping (laser) - Refractive index - Sulfur compounds

Uncontrolled terms:All optical switch - All-fiber devices - Amplified spontaneous emission source - Interference spectrum - Modulation depth - Near infrared light - Photothermal effects - Tungsten disulfide

Classification code:701 Electricity and Magnetism - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744.1 Lasers, General - 941.3 Optical Instruments

Numerical data indexing:Percentage 1.81e+01%, Size 1.55e-06m, Size 8.00e-10m, Size 9.80e-07m

DOI:10.1080/10739149.2020.1739702

Funding details: Number: F201405, Acronym: -, Sponsor: Natural Science Foundation of Heilongjiang Province;Number: 61405043, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 3072019CF2502, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work was supported by the National Natural Science Foundation of China (NSFC, 11574061, 61405043), the Natural Science Foundation of Heilongjiang Province (LC2018026, F201405), and the Fundamental Research Funds for the Central Universities (3072019CF2502).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202008648633

Title:Optimization of a multi-TW few-cycle 1.7-µm source based on Type-I BBO dual-chirped optical parametric amplification????(Open Access)

Authors:Xu, Lu (1); Nishimura, Kotaro (1, 2); Suda, Akira (2); Midorikawa, Katsumi (1); Fu, Yuxi (1, 3); Takahashi, Eiji J. (1)

Author affiliation:(1) jpn, Wako, Saitama; 351-0198, 2-1 Hirosawa, Wako, Saitama; (2) jpn, Noda; Chiba; 278-8510, 2641 Yamazaki, Noda, Chiba; (3) chn, Xi’an, Shaanxi; 710119, Xi’an, Shaanxi

Corresponding author:Takahashi, Eiji J.(ejtak@riken.jp)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:28

Issue:10

Issue date:May 11, 2020

Publication year:2020

Pages:15138-15147

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:This paper presents the optimization of a dual-chirped optical parametric amplification (DC-OPA) scheme for producing an ultrafast intense infrared (IR) pulse. By employing a total energy of 0.77 J Ti:sapphire pump laser and type-I BBO crystals, an IR pulse energy at the center wavelength of 1.7 µm exceeded 0.1 J using the optimized DC-OPA. By adjusting the injected seed spectrum and prism pair compressor with a gross throughput of over 70%, the 1.7-µm pulse was compressed to 31 fs, which resulted in a peak power of up to 2.3 TW. Based on the demonstration of the BBO type-I DC-OPA, we propose a novel OPA scheme called the "dual pump DC-OPA" for producing a high-energy IR pulse with a two-cycle duration.

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.

Number of references:25

Main heading:Optical parametric amplifiers

Controlled terms:Optical pumping - Sapphire - Titanium compounds

Uncontrolled terms:BBO crystals - Center wavelength - Cycle duration - Optical parametric amplification - Pulse energies - Pump laser - Ti:sapphire - Total energy

Classification code:482.2.1 Gems - 714 Electronic Components and Tubes

Numerical data indexing:Energy 1.00e-01J, Percentage 7.00e+01%, Power 2.30e+12W, Time 3.10e-14s

DOI:10.1364/OE.392045

Funding details: Number: 17H01067,19H05628, Acronym: JSPS, Sponsor: Japan Society for the Promotion of Science;Number: JP-MXS0118068681, Acronym: MEXT, Sponsor: Ministry of Education, Culture, Sports, Science and Technology;Number: -, Acronym: -, Sponsor: RIKEN;

Funding text:Japan Society for the Promotion of Science (17H01067, 19H05628); MEXT Quantum Leap Flagship Program (JP-MXS0118068681); RIKEN (FY 2019 President discretionary funds); Matsuo Foundation 2018. We thankfully acknowledge valuable discussions by Dr. O. D. M?cke. (DESY, CFEL).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

Accession number:20203709150814

Title:Real-time infrared image detail enhancement based on fast guided image filter and plateau equalization

Authors:Chen, Yaohong (1, 2, 3); Kang, Jin U. (3); Zhang, Gaopeng (1); Cao, Jianzhong (1); Xie, Qingsheng (1); Kwan, Chiman (4)

Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore; MD; 21218, United States; (4) Signal Processing, Inc., Rockville; MD; 20850, United States

Corresponding author:Kwan, Chiman(chiman.kwan@signalpro.net)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:21

Issue date:July 20, 2020

Publication year:2020

Pages:6407-6416

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:Image detail enhancement is critical to the performance of infrared imaging systems because the original images generally suffer from low contrast and a low signal-to-noise ratio. Although conventional decomposition-based methods have advantages in enhancing image details, they also have clear disadvantages, which include intensive computations, over-enhanced noise, and gradient reversal artifacts. In this paper, we propose to accelerate enhancement processing by using a fast guided filter and plateau equalization. Our method consists of image decomposition, base and detail layers processing, and projection of the enhanced image to an 8-bit dynamic range. Experimental results demonstrated that our proposed method achieves a good balance among detail enhancement performance, noise and gradient reversal artifacts suppression, and computational cost, with a frame rate around 30 fps for 640 × 512 infrared images.

© 2020 Optical Society of America.

Number of references:23

Main heading:Image enhancement

Controlled terms:Equalizers - Signal to noise ratio - Thermography (imaging)

Uncontrolled terms:Computational costs - Detail enhancement - Guided filters - Guided images - Image decomposition - Low signal-to-noise ratio - Original images - Plateau equalization

Classification code:713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 716.1 Information Theory and Signal Processing - 742.1 Photography

DOI:10.1364/AO.396417

Funding details: Number: 201904910017, Acronym: CSC, Sponsor: China Scholarship Council;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. China Scholarship Council (201904910017); National Natural Science Foundation of China (51905529).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202008648088

Title:High-performance concealment of defective pixel clusters in infrared imagers

Authors:Chen, Yaohong (1, 2, 3); Kang, Jin U. (3); Zhang, Gaopeng (1); Cao, Jianzhong (1); Xie, Qingsheng (1); Kwan, Chiman (4)

Author affiliation:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore; MD; 21218, United States; (4) Signal Processing, Inc., Rockville; MD; 20850, United States

Corresponding author:Kwan, Chiman(chiman.kwan@signalpro.net)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:13

Issue date:May 1, 2020

Publication year:2020

Pages:4081-4090

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:Defective pixel concealment is a necessary procedure in infrared image processing and is widely used. However, current approaches are mainly focused on the concealment of isolated pixels and small defective pixel clusters. Consequently, these approaches cannot meet the requirements when applied to infrared detectors with large defective pixel clusters. In this paper, we present a novel and comprehensive approach to processing the image data acquired from infrared imagers with large and small defective pixel clusters. Our approach consists of preprocessing, coarse concealment, high dynamic range enhancement, and fine concealment by generative adversarial networks. Experiments using mid-wave infrared and long-wave infrared images demonstrated that the proposed approach achieves better results than the best conventional approach, known as transforming image completion, with the peak signal-to-noise ratio and structural similarity metrics improved by 2.7063 dB (16.3%) and 0.1951 dB (34.1%), respectively.

© 2020 Optical Society of America.

Number of references:26

Main heading:Pixels

Controlled terms:Data handling - Defects - Image enhancement - Infrared imaging - Infrared radiation - Signal to noise ratio

Uncontrolled terms:Adversarial networks - Conventional approach - High dynamic range - Image completion - Long wave infrared - Mid wave infrared (MWIR) - Peak signal to noise ratio - Structural similarity

Classification code:716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 746 Imaging Techniques - 951 Materials Science

Numerical data indexing:Percentage 1.63e+01%, Percentage 3.41e+01%

DOI:10.1364/AO.391668

Funding details: Number: 201904910017, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2019JQ-295, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. China Scholarship Council (201904910017); National Natural Science Foundation of China (51905529); Natural Science Foundation of Shaanxi Province (2019JQ-295).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909589273

Title:Space-based missile warning technology based on fine spectrum of potassium atoms in exhaust plumes

Authors:Wang, Sufeng (1); Wu, Kuijun (2); Feng, Yutao (1); Chang, Chenguang (1); Dang, Jianan (1); Hu, Bingliang (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Science, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan; 430071, China

Corresponding author:Feng, Yutao(wsf08272076@163.com)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11566

Part number:1 of 1

Issue title:AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics

Issue date:2020

Publication year:2020

Article number:1156607

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639539

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Spectroscopy and Imaging; and Biomedical Optics, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165073

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:The main propose of this paper is to discuss the possibility of a space-based early warning technology for missiles in boost phase based on the near-infrared fine spectrum of potassium atoms in the exhaust plume. Emission transfer link from the exhaust plume to the detector is established in combination with the observation model of satellite and target on the ground. Line-by-line integral method is used to calculate the characteristic spectrum of potassium atoms. The result shows the potassium line have high spectral emissivity and narrow bandwidth. The analyses on the atmospheric transmission and background radiation indicate that the atmospheric transmission of the 769.896 nm potassium line is higher than that of the 766.490 nm potassium line which lies on top of an O2line, and the irradiance of the 769.896 nm line is stronger than that of background and the 766.490 nm line. Considering atmospheric transmission and background radiation, it is suitable to choose the 769.896 nm line to detect the exhaust plume of the missile. According to the characteristic of potassium atoms emission line with narrow bandwidth, a 1.2 nm wide filter centered on 770nm is used to extract target signal. The maximum detection range and other indexes are evaluated. The simulation results show that ultra-narrow band filter can achieve a large degree of background suppression, and the system performance indexes meet the detection requirements. Therefore, it is feasible that missile detection can be realized by using near-infrared fine spectrum of potassium atoms.

© 2020 SPIE. All rights reserved.

Number of references:14

Main heading:Potassium

Controlled terms:Atoms - Bandwidth - Electromagnetic wave emission - Infrared devices - Light transmission - Missiles - Radiation - Signal processing - Spectroscopy - Thermal plumes

Uncontrolled terms:Atmospheric transmissions - Background radiation - Background suppression - Characteristic spectrum - Line integral methods - Performance indices - Spectral emissivity - Ultra narrow band

Classification code:404.1 Military Engineering - 549.1 Alkali Metals - 711 Electromagnetic Waves - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 931.3 Atomic and Molecular Physics

Numerical data indexing:Size 1.20e-09m, Size 7.66e-07m, Size 7.70e-07m

DOI:10.1117/12.2574904

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20195107871414

Title:Fabrication of refractive silicon microlens array with a large focal number and accurate lens profile

Authors:Zhou, Xiaojun (1); Song, Aiguo (1); Wang, Shuai (2); Wang, Mengjia (3); Yu, Weixing (2)

Author affiliation:(1) School of Instrument Science and Engineering, Southeast University, Nanjing; 210000, China; (2) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi’an; 710119, China; (3) FEMTO-ST Institute, Université Bourgogne Franche-Comté, UMR CNRS 6174, 15B Av. des Montboucons, Besançon Cedex; 25030, France

Corresponding author:Yu, Weixing(yuwx@opt.ac.cn)

Source title:Microsystem Technologies

Abbreviated source title:Microsyst Technol

Volume:26

Issue:4

Issue date:April 1, 2020

Publication year:2020

Pages:1159-1166

Language:English

ISSN:09467076

E-ISSN:14321858

Document type:Journal article (JA)

Publisher:Springer Science and Business Media Deutschland GmbH

Abstract:In this paper, we demonstrate the fabrication of refractive silicon microlens array with a large focal number and almost perfect spherical lens shape. Through a modified thermal reflow, photoresist microlens array of a large focal number is fabricated, which is then transferred into the silicon substrate by ion beam milling. To reach an accurate spherical lens profile, we both theoretically and experimentally study the practical factors that harm the pattern transfer fidelity, which mainly include the etching selectivity and faceting effect. Other secondary etching effects, such as the trenching effect and re-deposition effect, are also discussed. Based on these studies, a silicon microlens array with a focal number of 1.35 has been successfully obtained, with the profile error controlled well-below 0.121 μm, less than λ/6 within the whole infrared wavelength band. Besides, the fabricated microlens array exhibits a good uniformity and fine surface smoothness. The fabricated silicon microlens arrays can be applied in minatured infrared and terahertz imaging devices, or used as the master mould for soft lithography.

© 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Number of references:23

Main heading:Fabrication

Controlled terms:Etching - Ion beams - Microlenses - Microoptics - Optical instrument lenses - Photoresists - Silicon

Uncontrolled terms:Etching selectivity - Infrared wavelengths - Micro-lens arrays - Pattern transfers - Silicon microlens - Silicon substrates - Surface smoothness - Terahertz imaging

Classification code:549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 802.2 Chemical Reactions - 932.1 High Energy Physics

DOI:10.1007/s00542-019-04644-4

Funding details: Number: 61474156, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:The authors acknowledge the financial support from Natural Science Foundation of China (61474156). Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203509096421

Title:Instrument design and forward modeling of near-space wind and temperature sensing interferometer

Title of translation:临近空间风温遥感干涉仪设计及正演

Authors:He, Wei-Wei (1); Wu, Kui-Jun (2); Fu, Di (3); Wang, Hou-Mao (4); Li, Juan (3)

Author affiliation:(1) City College, Wuhan University of Science and Technology, Wuhan; 430083, China; (2) Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan; 430071, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) National Space Science Center, Chinese Academy of Sciences, Beijing; 100190, China

Corresponding author:Wu, Kui-Jun(wukuijun@wipm.ac.cn)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:28

Issue:8

Issue date:August 1, 2020

Publication year:2020

Pages:1678-1689

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences

Abstract:Wind and temperature measurements in near-space (20-100 km) play a prominent part in the development of atmospheric physics and space science, which are of considerable academic and application value. The atmospheric wind and temperature fields in the stratosphere, mesosphere, and lower thermosphere (40-80 km) can be simultaneously detected using the wide-angle Michelson interferometer with the radiation source observation of the limb-viewing O2(a1Δg) airglow near 1.27 μm. Hence, a near-space wind and temperature sensing interferometer was designed in this study, and its modeling and forward simulation were conducted. Based on the characteristics of the radiation spectrum and principle of spectral line selection, two sets of different intensity lines were employed for wind and temperature detection.The weak group was used for low altitude measurement to avoid the influence of self absorption on the measurement results; the strong line was used for high altitude detection to achieve high measurement accuracy. The forward model was composed of the system parameters of atmosphere radiation transmission module, Michelson interferometer module, filter module, optical system, sensor array, and infrared focal plane. Through forward modeling, the limb-viewing image was obtained, and the uncertainty of wind velocity and temperature measurement was analyzed. The numerical simulation results show that the wind measurement accuracy is 1-3 m/s and temperature measurement accuracy is 1-3 K in the height range of 40-80 km, which meet the requirements of wind temperature detection accuracy in adjacent space.

© 2020, Science Press. All right reserved.

Number of references:28

Main heading:Atmospheric temperature

Controlled terms:Absorption spectroscopy - Geophysics - Ionosphere - Michelson interferometers - Optical systems - Spacecraft instruments - Temperature measurement - Temperature sensors - Uncertainty analysis

Uncontrolled terms:Atmosphere radiation - Atmospheric physics - Forward simulation - Infrared focal planes - Instrument designs - Lower thermosphere - Measurement accuracy - Temperature sensing

Classification code:443.1 Atmospheric Properties - 481.3 Geophysics - 655.1 Spacecraft, General - 741.3 Optical Devices and Systems - 922.1 Probability Theory - 941.3 Optical Instruments - 944.5 Temperature Measuring Instruments - 944.6 Temperature Measurements

Numerical data indexing:Size 1.27e-06m, Size 2.00e+04m to 1.00e+05m, Size 4.00e+04m to 8.00e+04m, Temperature 1.00e+00K to 3.00e+00K, Velocity 1.00e+00m/s to 3.00e+00m/s

DOI:10.3788/OPE.20202808.1678

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203809206020

Title:Multi-directional reconstruction algorithm for panoramic camera????(Open Access)

Authors:Qiu, Shi (1); Li, Bin (2); Cheng, Keyang (3); Zhang, Xiao (2); Duan, Guifang (4); Li, Feng (5)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Information Science and Technology, Northwest University, Xi'an; 710127, China; (3) School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang; 212013, China; (4) State Key Laboratory of CAD and CG, Zhejiang University, Hangzhou; 310058, China; (5) Institute of Education, University College London, London, United Kingdom

Corresponding author:Li, Bin(lib@nwu.edu.cn)

Source title:Computers, Materials and Continua

Abbreviated source title:Comput. Mater. Continua

Volume:65

Issue:1

Issue date:July 23, 2020

Publication year:2020

Pages:433-443

Language:English

ISSN:15462218

E-ISSN:15462226

Document type:Journal article (JA)

Publisher:Tech Science Press

Abstract:A panorama can reflect the surrounding scenery because it is an image with a wide angle of view. It can be applied in virtual reality, smart homes and other fields as well. A multi-directional reconstruction algorithm for panoramic camera is proposed in this paper according to the imaging principle of dome camera, as the distortion inevitably exists in the captured panorama. First, parameters of a panoramic image are calculated. Then, a weighting operator with location information is introduced to solve the problem of rough edges by taking full advantage of pixels. Six directions of the mapping model are built, which include up, down, left, right, front and back, according to the correspondence between cylinder and spherical coordinates. Finally, multi-directional image reconstruction can be realized. Various experiments are performed in panoramas (1024×1024) with 30 different shooting scenes. Results show that the azimuth image can be reconstructed quickly and accurately. The fuzzy edge can be alleviated effectively. The rate of pixel utilization can reach 84%, and it is 33% higher than the direct mapping algorithm. Large scale distortion is also further studied.

© 2020 Tech Science Press. All rights reserved.

Number of references:23

Main heading:Image reconstruction

Controlled terms:Automation - Cameras - Conformal mapping - Intelligent buildings - Pixels

Uncontrolled terms:Azimuth images - Imaging principle - Location information - Panoramic cameras - Panoramic images - Reconstruction algorithms - Scale distortion - Spherical coordinates

Classification code:402 Buildings and Towers - 731 Automatic Control Principles and Applications - 742.2 Photographic Equipment

Numerical data indexing:Percentage 3.30e+01%, Percentage 8.40e+01%

DOI:10.32604/cmc.2020.09708

Funding details: Number: XAB2016B23, Acronym: -, Sponsor: -;Number: A2026, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: ZJU, Sponsor: Zhejiang University;

Funding text:Funding Statement: This work is supported by Light of West China (Grant No. XAB2016B23), Chinese Academy of Sciences. And the Open Project Program of the State Key Lab of CAD & CG (Grant No. A2026), Zhejiang University.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20202308784988

Title:Visible and Near Infrared Spectral Analysis of the Lubricating Oil Dynamic Viscosity Based on Quantum Genetic-Neural Network Algorithm

Title of translation:量子遗传-神经网络算法的润滑油动力粘度值可见近红外光谱分析

Authors:Liu, Chen-Yang (1, 2); Tang, Xing-Jia (3); Yu, Tao (3); Wang, Tai-Sheng (1); Lu, Zhen-Wu (1); Yu, Wei-Xing (3)

Author affiliation:(1) R&D Center of Precision Instruments and Equipment, Changchun Institute of Optics, Fine Mechanics & Physics, Chinese Academy of Sciences, Changchun; 130033, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Yu, Wei-Xing(yuwx@opt.ac.cn)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:40

Issue:5

Issue date:May 1, 2020

Publication year:2020

Pages:1634-1639

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press

Abstract:Dynamic viscosity is one of the most important quality factors of lubricating oil. For the safety of high-speed railway, it is necessary to develop a real-time, fast and non-destructive method to monitor the status of the gearbox. Here we propose a new method that utilizes the quantum genetic-neural network algorithm to quantitatively analyze the visible and near-infrared spectra of lubricant acquired by a micro-spectrometer module. The method not only realizes non-destructive rapid real-time detection of the dynamic viscosity of high-speed railway transmission lubricating oil, but also further improves the prediction accuracy of the lubricating oil dynamic viscosity. Thanks to its excellent performance and small size, the miniature spectrometer has been widely used as a portable and nondestructive device. Here, two kinds of micro-spectral modules with visible/short-wave-infrared and near-infrared waveguide gratings are coupled with optical fibers and obtain a wide spectral range from 330 to 1 700 nm. Here the integrated waveguide and propagating makes the spectrometer compact and small. In experiment, a total of 78 lubricant samples with 13 different viscosity lubricants were prepared for spectral measurement by the micro-spectrometer. The raw spectral data was pre-processed using the Savitzky-Golay convolution smoothing and the first-order differentiation to eliminate the baseline drift and background noise. Next, principal component analysis and Mahalanobis distance algorithm were used to identify the samples outside the concentration boundary, and three out-of-bound samples were excluded. Finally, the BP neural network and the quantum genetic neural network methods were employed for quantitative analyses and the results are compared, respectively. The quantum genetic algorithm is a probabilistic evolutionary algorithm that combines the advantages of quantum computing and genetic algorithm. It uses the form of quantum chromosomes and quantum logic gates for global searching. Therefore, the quantum genetic algorithm can be used to optimize the weight and the threshold of neural network, and the modeling efficiency and accuracy can be improved significantly. In this paper, BP neural network algorithm and quantum genetic neural network algorithm were modeled and simulated respectively. Ten samples were randomly selected from 75 samples as prediction sets, and the remaining 65 were as modeling sets. In the quantum genetic algorithm, the population number was set to 40 and the termination algebra was 200. The optimization results showed that the algorithm could obtain the optimal solution quickly after training of only 81 generations. A comparison of the predicted results showed that the quantum genetic algorithm was much better than the BP neural network, the root mean square error of the prediction was significantly reduced from 0.345 5 to 0.029 4, and the coefficient of determination was increased from 0.850 4 to 0.979 9. This work has developed an effective method for compact, non-destructive, rapid and real-time detection of the dynamic viscosity of the lubricant and would find potential uses for the safety monitoring of high-speed trains.

© 2020, Peking University Press. All right reserved.

Number of references:13

Main heading:Neural networks

Controlled terms:Backpropagation - Chromosomes - Computation theory - Forecasting - Genetic algorithms - Infrared devices - Lubricating oils - Lubrication - Mean square error - Near infrared spectroscopy - Nondestructive examination - Optical fibers - Quantum computers - Quantum theory - Railroad cars - Railroad transportation - Railroads - Signal detection - Spectrometers - Spectrum analysis - Viscosity - Waveguides

Uncontrolled terms:Coefficient of determination - Genetic neural network - High speed train (HST) - Miniature Spectrometer - Nondestructive methods - Quantum genetic algorithm - Root mean square errors - Visible and near infrared

Classification code:433.1 Railroad Transportation, General - 461.2 Biological Materials and Tissue Engineering - 607.1 Lubricants - 607.2 Lubrication - 682.1.1 Railroad Cars - 714.3 Waveguides - 716.1 Information Theory and Signal Processing - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 722 Computer Systems and Equipment - 723.4 Artificial Intelligence - 741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 922.2 Mathematical Statistics - 931.2 Physical Properties of Gases, Liquids and Solids - 931.4 Quantum Theory; Quantum Mechanics

Numerical data indexing:Size 3.30e-07m to 1.70e-06m

DOI:10.3964/j.issn.1000-0593(2020)05-1634-06

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201708532559

Title:One-shot x-ray detection based on the instantaneous change in the refractive index of GaAs????(Open Access)

Authors:Gao, Guilong (1); He, Kai (1); Yi, Tao (2); Lv, Meng (3); Yuan, Yun (4); Yan, Xin (1); Yin, Fei (1); Li, Shaohui (1); Hu, Ronghao (3); Wang, Tao (1); Tian, Jinshou (1)

Author affiliation:(1) Key Laboratory of Ultra-Fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM, Chinese Academy of Sciences (CAS), Xi'an, Shaanxi; 710119, China; (2) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan; 621900, China; (3) College of Physics, Sichuan University, Chendu, Sichuan; 610064, China; (4) Rocket Force Academy, Beijing; 100101, China

Corresponding author:He, Kai(hekai@opt.ac.cn)

Source title:AIP Advances

Abbreviated source title:AIP Adv.

Volume:10

Issue:4

Issue date:April 1, 2020

Publication year:2020

Article number:045024

Language:English

E-ISSN:21583226

Document type:Journal article (JA)

Publisher:American Institute of Physics Inc.

Abstract:An interferometric semiconductor x-ray detection system is proposed in this paper. The system is based on the RadOptic effect, and it utilizes Fabry-Perot interferometry to measure radiation-induced changes in the optical refractive index of a semiconductor (GaAs). In this work, the intrinsic time resolution and the sensitivity of a Fabry-Perot interferometric sensor were systemically studied. Based on the transient free carrier absorption model, the prototype system was established to quantitatively measure the time-dependent x-ray flux with the deconvolution algorithm for the first time. The time resolution of the detection system was approximately 21 ps, and the output signal induced by an x-ray pulse showed a high signal-to-noise ratio and immunity to electromagnetic interference. This interferometer will enable x-ray bang-time and fusion burn-history measurements in inertial confinement fusion with higher time resolution.

© 2020 Author(s).

Number of references:18

Main heading:X rays

Controlled terms:Deconvolution - Electromagnetic pulse - Fabry-Perot interferometers - Gallium arsenide - III-V semiconductors - Interferometry - Refractive index - Semiconducting gallium - Semiconducting gallium arsenide - Signal to noise ratio

Uncontrolled terms:Deconvolution algorithm - Fabry-Perot interferometric sensors - Fabry-Perot interferometry - Free carrier absorption - High signal-to-noise ratio - Higher time resolution - Radiation-induced - X-ray detection system

Classification code:701 Electricity and Magnetism - 712.1.1 Single Element Semiconducting Materials - 712.1.2 Compound Semiconducting Materials - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 804 Chemical Products Generally - 921 Mathematics - 932.1 High Energy Physics - 941.3 Optical Instruments - 941.4 Optical Variables Measurements

Numerical data indexing:Time 2.10e-11s

DOI:10.1063/5.0005771

Funding details: Number: 2019JQ-930, Acronym: -, Sponsor: -;Number: 11575166,71705255, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China (Grant Nos. 71705255, 11575166) and Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2019JQ-930).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20201208321446

Title:Manipulation of Airy Beams in Dynamic Parabolic Potentials

Authors:Liu, Feng (1); Zhang, Jingwen (1); Zhong, Wei-Ping (2); Belić, Milivoj R. (3); Zhang, Yu (4); Zhang, Yanpeng (1); Li, Fuli (5); Zhang, Yiqi (1)

Author affiliation:(1) Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Department of Electronic and Information Engineering, Shunde Polytechnic, Shunde; 528300, China; (3) Science Program, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar; (4) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China; (5) Department of Applied Physics, School of Science, Xi'an Jiaotong University, Xi'an; 710049, China

Corresponding author:Zhang, Yiqi(zhangyiqi@mail.xjtu.edu.cn)

Source title:Annalen der Physik

Abbreviated source title:Ann Phys Leipzig

Volume:532

Issue:4

Issue date:April 1, 2020

Publication year:2020

Article number:1900584

Language:English

ISSN:00033804

E-ISSN:15213889

CODEN:ANPYA2

Document type:Journal article (JA)

Publisher:Wiley-VCH Verlag

Abstract:The propagation of finite energy Airy beams in dynamic parabolic potentials, including uniformly moving, accelerating, and oscillating potentials, is investigated. The propagation trajectories of Airy beams are strongly affected by the dynamic potentials, but the periodic inversion of the beam remains invariant. The results may broaden the potential applications of Airy beams, and also enlighten ideas on Airy beam manipulation in nonlinear regimes.

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Number of references:36

Main heading:Physics

Uncontrolled terms:Airy beams - Dynamic potential - Finite energy - Oscillating potential - Parabolic potential - Periodic inversion

DOI:10.1002/andp.201900584

Funding details: Number: NPRP 11S‐1126‐170033, Acronym: QNRF, Sponsor: Qatar National Research Fund;Number: 2018M633499, Acronym: -, Sponsor: -;Number: 2017JZ019, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: xzy012019038, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work was supported by the Natural Science Foundation of Shaanxi province (2017JZ019), Chinese Postdoctoral Science Foundation (2018M633499), Fundamental Research Funds for the Central Universities (xzy012019038, xzy022019076), and Qatar National Research Fund, project NPRP 11S‐1126‐170033. The authors acknowledge the computational resources provided by the HPC platform of Xi'an Jiaotong University.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200908240268

Title:A pedestrian extraction algorithm based on single infrared image

Authors:Zhou, Dongmei (1); Qiu, Shi (2); Song, Yang (3); Xia, Kaijian (4)

Author affiliation:(1) Chengdu University of Technology, College of Information Science & Technology, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) High Technology Research and Development Center of the Ministry of Science and Technology, Beijing, China; (4) Changshu No.1 People' Hospital, Jiangsu, China

Corresponding author:Qiu, Shi(qiushi215@163.com)

Source title:Infrared Physics and Technology

Abbreviated source title:Infrared Phys Technol

Volume:105

Issue date:March 2020

Publication year:2020

Article number:103236

Language:English

ISSN:13504495

CODEN:IPTEEY

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:Infrared image can show the state of objects at night, which is an important way to obtain the information of objects at night. To solve the extraction of pedestrians completely from single infrared image, we analyze the features of infrared image and propose a pedestrian extraction algorithm based on single infrared image. Firstly, neighborhood and multi-projection models are constructed to locate suspected pedestrian areas. Then, the head in the infrared imaging centripetally is used to build the template. Finally, the weighted fusion of global template and head template is used to extract pedestrians. Experiments show that the algorithm proposed in this paper can extract pedestrians in various motion modes under complex conditions, and has strong robustness.

© 2020 Elsevier B.V.

Number of references:35

Main heading:Extraction

Controlled terms:Infrared imaging - Thermography (imaging)

Uncontrolled terms:Complex condition - Extraction algorithms - Head - Pedestrian - Pedestrian areas - Projection models - Single frames - Strong robustness

Classification code:742.1 Photography - 746 Imaging Techniques - 802.3 Chemical Operations

DOI:10.1016/j.infrared.2020.103236

Funding details: Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work is supported by Chinese Academy of Sciences (No. XAB2016B23 ), project name Light of West China. And the Open Project Program of the State Key Lab of CAD&CG (Grant No. A2026 ), Zhejiang University .

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20200908211139

Title:Online correction method for the registration error between tsmftis detector and interferogram????(Open Access)

Authors:Cao, Jun (1); Yuan, Yan (1); Su, Lijuan (1); Zhu, Conghui (1); Yan, Qiangqiang (2)

Author affiliation:(1) Key Laboratory of Precision Opto-mechatronics Technology Sponsored by Ministry of Education, School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing; 100191, China; (2) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an; 710119, China

Corresponding author:Su, Lijuan(sulijuan@buaa.edu.cn)

Source title:Sensors (Switzerland)

Abbreviated source title:Sensors

Volume:20

Issue:4

Issue date:February 2, 2020

Publication year:2020

Article number:1195

Language:English

ISSN:14248220

Document type:Journal article (JA)

Publisher:MDPI AG

Abstract:Temporally-spatially modulated Fourier transform imaging spectrometers (TSMFTISs) provide high-throughout-type push-broom spectrometry with both temporal and spatial modulation features. The system requires strict registration between the detector and the interferogram. However, registration errors are unavoidable and directly change the corresponding optical path difference values of the interferogram. As a result, the interferogram should be corrected before restoring the spectrum. In order to obtain the correct optical path difference (OPD) values, an online registration error correction method based on robust least-square linear fitting is presented. The model of the registration error was constructed to analyze its effect on the reconstructed spectra. Fitting methods were used to obtain correct optical path difference information. Simulations based on the proposed method were performed to determine the influence of the registration error on the restored spectra and the effectiveness of the proposed correction method. The simulation results prove that the accuracy of the recovered spectrum can be improved after correcting the interferogram deviation caused by the registration error. The experimental data were also corrected using the proposed methods.

© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Number of references:23

Main heading:Least squares approximations

Controlled terms:Electromagnetic wave attenuation - Error correction - Interferometry - Mathematical transformations - Spectrometers

Uncontrolled terms:Fourier transform imaging spectrometers - Interferograms - Linear fitting - Registration error - Temporally

Classification code:711 Electromagnetic Waves - 741.3 Optical Devices and Systems - 921.3 Mathematical Transformations - 921.6 Numerical Methods - 941.4 Optical Variables Measurements

DOI:10.3390/s20041195

Funding details: Number: LSIT201914W, Acronym: -, Sponsor: -;Number: 61635002, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:Funding: This research was funded by the National Natural Science Foundation of China (Grant No. 61635002), the Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (No. LSIT201914W) and the Fundamental Research Funds for the Central University.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

Accession number:20205009602530

Title:Analysis of influence factors of surface defects detection on optical components

Authors:Deng, Mingjie (1, 2, 3); Shi, Feng (1, 2, 3); Sun, Guoyan (4); Xue, Shuai (1, 2, 3); Tie, Guipeng (1, 2, 3)

Author affiliation:(1) College of Intelligent Science, National University of Defense Technology, Changsha, Hunan province; 0731-84576473, China; (2) Hunan Key Laboratory of Ultra-Precision Machining Technology, Changsha, Hunan province, China; (3) Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology, Changsha, Hunan province, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11567

Part number:1 of 1

Issue title:AOPC 2020: Optical Sensing and Imaging Technology

Issue date:2020

Publication year:2020

Article number:1156704

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639553

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Sensing and Imaging Technology, AOPC 2020

Conference date:August 25, 2020 - August 27, 2020

Conference location:Xiamen, China

Conference code:165074

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Most of the existing defect detectors focus on the size, location, depth and number of defects of the tested components. The instrument is usually large in size and requires high accuracy for the environment and motion devices. In contrast, the direct random bed motion, which aims at finding and locating defects, is highly efficient, low-cost and environmentally practical, while the research on vibration-resistant defect tester is rare.In order to solve this problem, based on the principle of micro-scattering imaging in dark field, a set of optical component surface defect detection device is built, and the influence factors of light intensity, illumination angle, wavelength and other defect detection factors are experimentally studied, in order to provide design basis for the follow-up development of on-line defect detection instrument. The experimental results show that the most important factor affecting the sensitivity is the azimuth angle and pitch angle of the incident light, which is more than 30 degrees between the incident light and the scratch direction. When the pitch angle is between 60 degrees and 70 degrees, the higher detection sensitivity can be obtained. In addition, improving the illumination intensity can help to improve the detection of defects. In the visible range, the wavelength has little effect on the sensitivity.

© 2020 SPIE.

Number of references:8

Main heading:Surface defects

Controlled terms:Defects - Imaging techniques - Light

Uncontrolled terms:Analysis of influence factors - Detection of defects - Detection sensitivity - Illumination angle - Illumination intensity - Scattering imaging - Surface defect detections - Vibration resistants

Classification code:741.1 Light/Optics - 746 Imaging Techniques - 951 Materials Science

DOI:10.1117/12.2572696

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204309403524

Title:Longitudinal forced convection heat transfer for high power slab laser media

Title of translation:高功率板条激光介质的纵向强制对流换热技术

Authors:He, Jianguo (1, 2, 3); Li, Ming (4); Mo, Zeqiang (1, 2, 3); Wang, Jinduo (1, 2); Yu, Jin (1, 2); Dai, Shoujun (1, 2); Chen, Yanzhong (1); Ge, Wenqi (1); Liu, Yang (1, 3); Fan, Lianwen (5)

Author affiliation:(1) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (2) University of the Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Computational Optical Imaging Technology, Chinese Academy of Sciences, Beijing; 100094, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (5) Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing; 100094, China

Corresponding author:Yu, Jin(jinyu@aoe.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:49

Issue:9

Issue date:September 25, 2020

Publication year:2020

Article number:20200556

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics

Abstract:Thermal problem becomes more prominent in the highly-pumped laser gain mediums, for which, the forced convective heat transfer with the advantages of reliability and durability is widely used. However, a flow direction induced temperature gradient always appears within the laser operating substance during the convective heat transfer. Subsequently, it is significantly responsible for the detrimental thermal stress which mainly cause the wave front distortion. Herein, considering the idea of temperature matching between flow field and the operating substance, a cooling configuration for double face pumped slab crystal based on longitudinal forced convective heat transfer was presented, which showed a more efficient cooling and achieved a most homogeneous temperature distribution within the crystal. The influences of flow rate, state of flow field and surface roughness were systematically studied that a fully developed flow state, higher flow rate and rougher surface lead to an improvement in cooling capability. In the simulation with 30 L/min flow rate, the calculated convective heat transfer coefficient was as high as 104 W·m−2·K−1, and even higher when a more coarse surface was implemented. Furthermore, a module based on the configuration was fabricated and the experimental results agree well with the simulation, which shows a good temperature distribution and very weak thermal lensing is achieved.

Copyright ©2020 Infrared and Laser Engineering. All rights reserved.

Number of references:15

Main heading:Heat convection

Controlled terms:Cooling - Crystals - Flow fields - Heat transfer coefficients - Pumping (laser) - Surface roughness - Temperature distribution - Wavefronts

Uncontrolled terms:Convective heat transfer - Convective heat transfer Coefficient - Cooling configuration - Forced convective heat transfer - Fully developed flows - Reliability and durabilities - Temperature matching - Wavefront distortion

Classification code:631.1 Fluid Flow, General - 641.1 Thermodynamics - 641.2 Heat Transfer - 744.1 Lasers, General - 931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids

DOI:10.3788/IRLA20200556

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201608476816

Title:Photonic RF Phase-Encoded Signal Generation with a Microcomb Source????(Open Access)

Authors:Xu, Xingyuan (1); Tan, Mengxi (1); Wu, Jiang (1); Boes, Andreas (2); Corcoran, Bill (3); Nguyen, Thach G. (2); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6); Mitchell, Arnan (2); Moss, David (1)

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) School of Engineering, RMIT University, Melbourne; VIC; 3001, Australia; (3) Department of Electrical and Computer System Engineering, Monash University, Clayton; VIC, Australia; (4) Department of Physics and Material Science, City University of Hong Kong, Hong Kong, Hong Kong; (5) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (6) INSR-Énergie, Matériaux et Télécommunications, Varennes; QC, Canada

Corresponding author:Moss, David(dmoss@swin.edu.au)

Source title:Journal of Lightwave Technology

Abbreviated source title:J Lightwave Technol

Volume:38

Issue:7

Issue date:April 1, 2020

Publication year:2020

Pages:1722-1727

Article number:8930015

Language:English

ISSN:07338724

E-ISSN:15582213

CODEN:JLTEDG

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We demonstrate photonic RF phase encoding based on an integrated micro-comb source. By assembling single-cycle Gaussian pulse replicas using a transversal filtering structure, phase encoded waveforms can be generated by programming the weights of the wavelength channels. This approach eliminates the need for RF signal generators for RF carrier generation or arbitrary waveform generators for phase encoded signal generation. A large number of wavelengths - up to 60 - were provided by the microcomb source, yielding a high pulse compression ratio of 30. Reconfigurable phase encoding rates ranging from 2 to 6 Gb/s were achieved by adjusting the length of each phase code. This article demonstrates the significant potentials of this microcomb-based approach to achieve high-speed RF photonic phase encoding with low cost and footprint.

© 1983-2012 IEEE.

Number of references:41

Main heading:Signal generators

Controlled terms:Charge carriers - Encoding (symbols) - Signal encoding

Uncontrolled terms:Arbitrary waveform generator - Encoded signals - Filtering structures - Gaussian pulse - Phase encoding - Reconfigurable - RF signal generator - Wavelength channels

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 716.1 Information Theory and Signal Processing - 723.2 Data Processing and Image Processing

Numerical data indexing:Bit_Rate 2.00e+09bit/s to 6.00e+09bit/s

DOI:10.1109/JLT.2019.2958564

Funding details: Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: DP150104327, Acronym: ARC, Sponsor: Australian Research Council;Number: XDB24030000, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 074-U 01, Acronym: -, Sponsor: Government Council on Grants, Russian Federation;

Funding text:Manuscript received October 2, 2019; accepted December 4, 2019. Date of publication December 9, 2019; date of current version April 1, 2020. This work was supported by the Australian Research Council Discovery Projects Program under Grant DP150104327. The work of R. Morandotti was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery, and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec, in part by the Canada Research Chair Program, in part by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program under Grant 074-U 01, and by the 1000 Talents Sichuan Program in China. The work of B. E. Little was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant XDB24030000. (Corresponding author: David J. Moss.) X. Xu, M. Tan, J. Wu, and D. Moss are with the Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn, VIC 3122, Australia (e-mail: xingyuanxu@swin.edu.au; mengxitan@swin.edu.au; jiayangwu@swin.edu.au; dmoss@swin.edu.au).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20201708505402

Title:Development of space-based diffractive telescopes

Authors:Zhao, Wei (1, 3, 4); Wang, Xin (1); Liu, Hua (2, 4); Lu, Zi-feng (2, 4); Lu, Zhen-wu (5)

Author affiliation:(1) School of Science, Changchun University of Science and Technology, Changchun; 130022, China; (2) School of Physics, Northeast Normal University, Changchun; 130024, China; (3) Jilin Police College, Changchun; 130117, China; (4) Key Laboratory of Spectral Imaging Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (5) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130024, China

Corresponding author:Wang, Xin(wangxin971241@163.comemailliuhua_rain@aliyun.com)Liu, Hua(liuhua_rain@aliyun.com)

Source title:Frontiers of Information Technology and Electronic Engineering

Abbreviated source title:Front. Inf. Technol. Electr. Eng.

Volume:21

Issue:6

Issue date:June 1, 2020

Publication year:2020

Pages:884-902

Language:English

ISSN:20959184

E-ISSN:20959230

Document type:Journal article (JA)

Publisher:Zhejiang University

Abstract:Membrane diffractive optical elements formed by fabricating microstructures on the substrates have two important characteristics, ultra-light mass (surface mass density < 0.1 kg/m2) and loose surface shape tolerances (surface accuracy requirements are on the order of magnitude of centimeter). Large-aperture telescopes using a membrane diffractive optical element as the primary lens have super large aperture, light weight, and low cost at launch. In this paper, the research and development on space-based diffractive telescopes are classified and summarized. First, the imaging theory and the configuration of diffractive-optics telescopes are discussed. Then, the developments in diffractive telescopes are introduced. Finally, the development prospects for this technology used as a high-resolution space reconnaissance system in the future are summarized, and the critical and relevant work that China should carry out is put forward.

© 2020, Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature.

Number of references:99

Main heading:Telescopes

Controlled terms:Density (optical) - Diffractive optical elements - Lenses - Light

Uncontrolled terms:Development prospects - High resolution - Large aperture - Large aperture telescopes - Reconnaissance systems - Research and development - Surface accuracy - Ultra-light mass

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Surface_Density 1.00e-01kg/m2

DOI:10.1631/FITEE.1900529

Funding details: Number: 11874091, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Project supported by the National Natural Science Foundation of China (No. 11874091)

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201108280077

Title:Material removal behaviour in axial ultrasonic assisted scratching of Zerodur and ULE with a Vickers indenter

Authors:Sun, Guoyan (1, 2); Shi, Feng (1); Zhao, Qingliang (3); Ma, Zhen (2); Yang, Donglai (2)

Author affiliation:(1) College of Artificial Intelligence, National University of Defense Technology, Changsha; 410073, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Center for Precision Engineering School of Mechatronics Engineering, Harbin Institute of Technology, Harbin; 150001, China

Corresponding author:Sun, Guoyan(sunguoyan@opt.ac.cn)

Source title:Ceramics International

Abbreviated source title:Ceram Int

Volume:46

Issue:10

Issue date:July 2020

Publication year:2020

Pages:14613-14624

Language:English

ISSN:02728842

CODEN:CINNDH

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:Compared to conventional grinding, axial ultrasonic vibration-assisted peripheral grinding (AUPG) has advantages in terms of the improved grinding quality, higher efficiency, as well as lowered brittle damages. However, the present studies on material removal mechanism of AUPG are still not sufficient which thereafter limit its application potential. This paper aims to investigate the material removal mechanism of Zerodur and ULE through scratching by using a Vickers indenter under two conditions, with (ultrasonic vibration-assisted scratching (UVS)) and without (conventional scratching (CS)) axial ultrasonic vibration-assisted scratching while the other scratching parameters are identical. The indenter's kinematic characteristic, scratched morphology, scratched groove dimensions and critical depth of cut are compared in between UVS and CS. The experimental results indicate that the dynamic contact length between indenter and workpiece for UVS is remarkable longer than that for CS, which is helpful to promote the crack interference and hence to increase the proportion of ductile material removal mode, resulting in the diminishment of brittle fracture size in UVS. The propagation direction of median cracks in CS are relatively consistent, while in UVS the periodic varied contact zone and contact force in between the indenter and workpiece could promote the cracks propagating in different orientations, and then to improve the material removals rate in UVS. Moreover, both the critical brittle-ductile transition depth of cut and critical brittle depth of cut in UVS are bigger than that in CS, meaning the material removed in UVS with a bigger ductile ratio leading to a decreased brittle damage depth. In addition, the different material removal behaviours between Zerodur and ULE are also investigated. This fundamental work lays a theoretical foundation for the technological development and broad application of hard/brittle material oriented AUPG, as well as poses a meaningful guidance for the ultrasonic vibration assisted grinding on low-expansion optical glasses.

© 2020 Elsevier Ltd and Techna Group S.r.l.

Number of references:30

Main heading:Ultrasonic effects

Controlled terms:Cracks - Grinding (machining) - Optical glass - Ultrasonic waves

Uncontrolled terms:Brittle ductile transitions - Kinematic characteristics - Material removal behaviours - Material removal mechanisms - Propagation direction - Technological development - Theoretical foundations - Ultrasonic vibration assisted grinding

Classification code:604.2 Machining Operations - 741.3 Optical Devices and Systems - 753.1 Ultrasonic Waves

DOI:10.1016/j.ceramint.2020.02.262

Funding details: Number: XAB2019B24, Acronym: -, Sponsor: -;Number: 51675526, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) [grant number 51835013 , U1801259 , 51675526 ] and CAS Light of West China Program [grant number XAB2019B24 ], China.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204709511541

Title:Hyperspectral deep convolution anomaly detection based on weight adjustment strategy

Authors:Chong, Dan (1, 2); Hu, Bingliang (1); Gao, Xiaohui (1); Gao, Hao (3); Xia, Pu (1); Wu, Yinhua (4)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17, Xinxi Road, Xi’an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Network Data Science and Technology, Institute of Computing Technology, Chinese Academy of Sciences, No. 6, KeXueYuan South Road, Haidian District, Beijing; 100190, China; (4) Xi’an Technological University, School of Optoelectronics Engineering, No. 2 Xuefuzhonglu Road, Xi’an; 710021, China

Corresponding author:Gao, Xiaohui(gaoxhui@163.com)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:59

Issue:31

Issue date:November 1, 2020

Publication year:2020

Pages:9633-9642

Language:English

ISSN:1559128X

E-ISSN:21553165

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:Hyperspectral anomaly detection has garnered much research in recent years due to the excellent detection ability of hyperspectral remote sensing in agriculture, forestry, geological surveys, environmental monitoring, and battlefield target detection. The traditional anomaly detection method ignores the non-linearity and complexity of the hyperspectral image (HSI), while making use of the effectiveness of spatial information rarely. Besides, the anomalous pixels and the background are mixed, which causes a higher false alarm rate in the detection result. In this paper, a hyperspectral deep net-based anomaly detector using weight adjustment strategy (WAHyperDNet) is proposed to circumvent the above issues. We leverage three-dimensional convolution instead of the two-dimensional convolution to get a better way of handling high-dimensional data. In this study, the determinative spectrum–spatial features are extracted across the correlation between HSI pixels. Moreover, feature weights in the method are automatically generated based on absolute distance and the spectral similarity angle to describe the differences between the background pixels and the pixels to be tested. Experimental results on five public datasets show that the proposed approach outperforms the state-of-the-art baselines in both effectiveness and efficiency.

© 2020 Optical Society of America

Number of references:47

Main heading:Anomaly detection

Controlled terms:Agricultural robots - Clustering algorithms - Convolution - Forestry - Pixels - Radar target recognition - Remote sensing - Spectroscopy

Uncontrolled terms:Anomaly detection methods - Automatically generated - Effectiveness and efficiencies - Environmental Monitoring - High dimensional data - Hyperspectral anomaly detection - Hyperspectral remote sensing - Spatial informations

Classification code:716.1 Information Theory and Signal Processing - 716.2 Radar Systems and Equipment - 903.1 Information Sources and Analysis

DOI:10.1364/AO.400563

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20211210099322

Title:Generation of sub-7 fs radially polarized pulses by thin plate post-compression

Authors:Cao, H. (1, 2); Nagymihaly, R.S. (1); Khodakovskiy, N. (1); Lopez-Martens, R. (1, 3); Pajer, V. (1); Bohus, J. (1); Bussiere, B. (4); Falcoz, F. (4); Borzsonyi, A. (1); Kalashnikov, M. (1)

Author affiliation:(1) ELI-ALPS, ELI-Hu Nonprofit Ltd., Wolfgang Sandner utca 3, Szeged; 6728, Hungary; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) Laboratoire d'Optique Appliquée, CNRS, Ecole Polytechnique, ENSTA Paris, Institut Polytechnique de Paris, 181 chemin de la Hunire et des Joncherettes, Palaiseau; 91120, France; (4) Amplitude Technologies, 2-4 rue du Bois Chaland, CE, Evry; 2926 91029, France

Corresponding author:Nagymihaly, R.S.(roland.nagymihaly@eli-alps.hu)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Part number:1 of 1

Issue title:Advanced Solid State Lasers, in Proceedings Laser Congress 2020 (ASSL, LAC) Part of Laser Congress

Issue date:October 13, 2020

Publication year:2020

Article number:AW2A.2

Language:English

ISBN-13:9781557528209

Document type:Conference article (CA)

Conference name:Advanced Solid State Lasers, ASSL 2020 - Part of Laser Congress, LAC 2020

Conference date:October 13, 2020 - October 16, 2020

Conference location:Washington, DC, United states

Conference code:167363

Publisher:The Optical Society

Abstract:Post-compression of radially polarized 30 fs pulses was performed in multiple thin fused silica plates for the first time. Sub-7 fs pulses with 90 µJ were obtained after re-compression. This approach is scalable in energy.

© 2020 The Author(s)

Number of references:6

Main heading:Solid state lasers

Controlled terms:Fused silica

Uncontrolled terms:Fs pulse - Fused silica plates - Post compressions - Radially polarized - Thin plate

Classification code:744.4 Solid State Lasers - 812.3 Glass

Numerical data indexing:Time 3.00e-14s

Funding details: Number: -, Acronym: EC, Sponsor: European Commission;Number: -, Acronym: FEDER, Sponsor: European Regional Development Fund;

Funding text:The ELI-ALPS project (GINOP-2.3.6-15-2015-00001) is supported by the European Union and co-financed by the European Regional Development Fund. The authors would like to thank J?r?me Faure for the loan of the four-quadrant waveplate.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201108301169

Title:2D Layered Graphene Oxide Films Integrated with Micro-Ring Resonators for Enhanced Nonlinear Optics????(Open Access)

Authors:Wu, Jiayang (1); Yang, Yunyi (1, 2); Qu, Yang (1); Jia, Linnan (1); Zhang, Yuning (1); Xu, Xingyuan (1); Chu, Sai T. (3); Little, Brent E. (4); Morandotti, Roberto (5); Jia, Baohua (1, 2); Moss, David J. (1)

Author affiliation:(1) Center for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (3) Department of Physics, City University of Hong Kong, 83 Tat Chee Avenue, 999077, Hong Kong; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (5) INRS-Énergie, Matériaux et Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada

Corresponding author:Jia, Baohua(bjia@swin.edu.au)

Source title:Small

Abbreviated source title:Small

Volume:16

Issue:16

Issue date:April 1, 2020

Publication year:2020

Article number:1906563

Language:English

ISSN:16136810

E-ISSN:16136829

CODEN:SMALBC

Document type:Journal article (JA)

Publisher:Wiley-VCH Verlag

Abstract:Layered 2D graphene oxide (GO) films are integrated with micro-ring resonators (MRRs) to experimentally demonstrate enhanced nonlinear optics. Both uniformly coated (1−5 layers) and patterned (10−50 layers) GO films are integrated on complementary-metal-oxide-semiconductor (CMOS)-compatible doped silica MRRs using a large-area, transfer-free, layer-by-layer GO coating method with precise control of the film thickness. The patterned devices further employ photolithography and lift-off processes to enable precise control of the film placement and coating length. Four-wave-mixing (FWM) measurements for different pump powers and resonant wavelengths show a significant improvement in efficiency of ≈7.6 dB for a uniformly coated device with 1 GO layer and ≈10.3 dB for a patterned device with 50 GO layers. The measurements agree well with theory, with the enhancement in FWM efficiency resulting from the high Kerr nonlinearity and low loss of the GO films combined with the strong light–matter interaction within the MRRs. The dependence of GO's third-order nonlinearity on layer number and pump power is also extracted from the FWM measurements, revealing interesting physical insights about the evolution of the GO films from 2D monolayers to quasi bulk-like behavior. These results confirm the high nonlinear optical performance of integrated photonic resonators incorporated with 2D layered GO films.

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Number of references:69

Main heading:Oxide films

Controlled terms:CMOS integrated circuits - Coatings - Efficiency - Four wave mixing - Graphene - Metals - MOS devices - Optical resonators - Oxide semiconductors - Silica

Uncontrolled terms:Complementary metal oxide semiconductors - Integrated photonics - Kerr nonlinearity - Lift-off process - Microring resonator - Precise control - Resonant wavelengths - Third-order non-linearity

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally - 813.2 Coating Materials - 913.1 Production Engineering

DOI:10.1002/smll.201906563

Funding details: Number: DP150102972,DP190103186,IC180100005, Acronym: -, Sponsor: -;Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: Z180007, Acronym: -, Sponsor: Natural Science Foundation of Beijing Municipality;

Funding text:This work was supported by the Australian Research Council Discovery Projects Programs (No. DP150102972 and DP190103186), the Swinburne ECR‐SUPRA program, the Industrial Transformation Training Centers scheme (Grant No. IC180100005), and the Beijing Natural Science Foundation (No. Z180007). The authors also acknowledge the Swinburne Nano Lab for the support in device fabrication and characterization. R.M. acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery, and Acceleration Grants Schemes, by the MESI PSR‐SIIRI Initiative in Quebec.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze, Green

Accession number:20204609475620

Title:RF and Microwave Fractional Differentiator Based on Photonics????(Open Access)

Authors:Tan, Mengxi (1); Xu, Xingyuan (1); Corcoran, Bill (2); Wu, Jiayang (1); Boes, Andreas (3); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6, 7); Mitchell, Arnan (3); Moss, David J. (1)

Author affiliation:(1) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC, Australia; (2) Department of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC, Australia; (3) School of Engineering, Rmit University, Melbourne; VIC, Australia; (4) Department of Physics, City University of Hong Kong, Hong Kong; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (6) INSR-Énergie, Matériaux et Télécommunications, Varennes; QC, Canada; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Corresponding author:Moss, David J.(dmoss@swin.edu.au)

Source title:IEEE Transactions on Circuits and Systems II: Express Briefs

Abbreviated source title:IEEE Trans. Circuits Syst. Express Briefs

Volume:67

Issue:11

Issue date:November 2020

Publication year:2020

Pages:2767-2771

Article number:8954621

Language:English

ISSN:15497747

E-ISSN:15583791

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We report a photonic radio frequency (RF) fractional differentiator based on an integrated Kerr micro-comb source. The micro-comb source has a free spectral range (FSR) of 49 GHz, generating a large number of comb lines that serve as a high-performance multi-wavelength source for the differentiator. By programming and shaping the comb lines according to calculated tap weights, arbitrary fractional orders ranging from 0.15 to 0.90 are achieved over a broad RF operation bandwidth of 15.49 GHz. We experimentally characterize the frequency-domain RF amplitude and phase response as well as the temporal response with a Gaussian pulse input. The experimental results show good agreement with theory, confirming the effectiveness of our approach towards high-performance fractional differentiators featuring broad processing bandwidth, high reconfigurability, and potentially reduced sized and cost.

© 2004-2012 IEEE.

Number of references:47

Main heading:Bandwidth

Controlled terms:Frequency domain analysis

Uncontrolled terms:Fractional differentiators - Free spectral range - Frequency domains - Multi-wavelength source - Operation bandwidth - Processing bandwidths - Reconfigurability - Temporal response

Classification code:716.1 Information Theory and Signal Processing - 921.3 Mathematical Transformations

Numerical data indexing:Frequency 1.55e+10Hz, Frequency 4.90e+10Hz

DOI:10.1109/TCSII.2020.2965158

Funding details: Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: DP150104327, Acronym: ARC, Sponsor: Australian Research Council;Number: XDB24030000, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 074-U01, Acronym: -, Sponsor: Government Council on Grants, Russian Federation;

Funding text:Manuscript received October 5, 2019; accepted January 6, 2020. Date of publication January 9, 2020; date of current version November 4, 2020. This work was supported by the Australian Research Council Discovery Projects Program under Grant DP150104327. The work of Brent E. Little was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant XDB24030000. The work of Roberto Morandotti was supported in part by the Natural Sciences and Engineering Research Council of Canada through the Strategic, Discovery and Acceleration Grants Schemes, in part by MESI PSR-SIIRI Initiative in Quebec, in part by the Canada Research Chair Program, in part by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program under Grant 074-U01, and in part by the 1000 Talents Sichuan Program in China. This brief was recommended by Associate Editor N. M. Neihart. (Corresponding author: David J. Moss.) Mengxi Tan, Xingyuan Xu, Jiayang Wu, and David J. Moss are with the Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn, VIC 3122, Australia (e-mail: dmoss@swin.edu.au).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20201908615940

Title:Simulation of magnetic field effects on the MCP gain

Authors:Li, L. (1, 2); Guo, L. (1, 2); Wei, Y. (1, 2); Sai, X. (1, 2); Liu, H. (1, 2); He, K. (1, 2); Gou, Y. (1, 2); Liu, B. (1, 2); Tian, J. (1, 2, 3); Chen, P. (1, 2, 3)

Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Information Avenue, New Industrial Park, High-tech Zone, Xi'an; SN 710119, China; (2) University of Chinese Academy of Sciences (CAS), 19 Yuquan road, Shijingshan district, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, 92 Wucheng road, Taiyuan, Shanxi; 030006, China

Corresponding author:Chen, P.(chenping@opt.cn)

Source title:Journal of Instrumentation

Abbreviated source title:J. Instrum.

Volume:15

Issue:3

Issue date:March 2020

Publication year:2020

Article number:C03048

Language:English

E-ISSN:17480221

Document type:Conference article (CA)

Publisher:IOP Publishing Ltd

Abstract:A multi-anode microchannel plate photomultiplier (Ma MCP-PMT) is an appropriate photo sensor for particle identification in high energy physics experiments such as PANDA, Belle II, etc. Since these detectors usually work in a strong magnetic field, the sensors must be immune to the field. In this article, the effects of the magnetic field on the conventional MCP and the atomic layer deposited MCP (ALD-MCP) are studied by simulating the electron multiplication in the microchannel of the MCP . Simulation results show that the gain of conventional MCP-PMTs increases a little before it starts decreasing while the magnetic field is further increasing. We found that the shortening of electronic trajectories and the reduction of secondary electrons mainly contribute to gain variations of a conventional MCP . For the ALD-MCP that usually has higher secondary emission yields, it is found that high re-diffusion secondary electron yields could make it more vulnerable to magnetic fields.

© 2020 IOP Publishing Ltd and Sissa Medialab.

Number of references:15

Main heading:Magnetic field effects

Controlled terms:Atomic layer deposition - Image storage tubes - Microchannels - Secondary emission

Uncontrolled terms:Atomic layer deposited - Electron multiplication - High energy physics experiments - Micro channel plate - Particle identifications - Secondary electron yield - Secondary emission yield - Strong magnetic fields

Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 714.1 Electron Tubes - 813.1 Coating Techniques

DOI:10.1088/1748-0221/15/03/C03048

Funding details: Number: XAB2017B12, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2018JQ1087, Acronym: -, Sponsor: ShanXi Science and Technology Department;Number: 11805267, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work is supported by grants from National Natural Science Foundation of China (Grant No. 11805267), Shanxi Provincial Department of Science and Technology (Grant No. 2018JQ1087), Xi'an Branch of Chinese Academy of Sciences (Grant No. XAB2017B12) and Postdoctoral Innovation Base in Xi'an.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204309390198

Title:Turing patterns in a fiber laser with a nested microresonator: Robust and controllable microcomb generation

Authors:Bao, Hualong (1); Olivieri, Luana (1); Rowley, Maxwell (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4, 5, 6); Moss, David J. (7); Totero Gongora, Juan Sebastian (1); Peccianti, Marco (1); Pasquazi, Alessia (1)

Author affiliation:(1) Department of Physics and Astronomy, Emergent Photonics (EPic) Laboratory, University of Sussex, Falmer, Brighton; BN1 9QH, United Kingdom; (2) Department of Physics, City University of Hong Kong, Kowloon Tong, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (4) INRS-EMT, 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (5) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China; (6) ITMO University, St. Petersburg; 199034, Russia; (7) Centre for Microphotonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia

Source title:Physical Review Research

Abbreviated source title:Phys. Rev. Res.

Volume:2

Issue:2

Issue date:June 2020

Publication year:2020

Article number:023395

Language:English

ISSN:26431564

Document type:Journal article (JA)

Publisher:American Physical Society

Abstract:Microcombs based on Turing patterns have been extensively studied in configurations that can be modeled by the Lugiato-Lefever equation. Typically, such schemes are implemented experimentally by resonant coupling of a continuous wave laser to a Kerr microcavity in order to generate highly coherent and robust waves. Here, we study the formation of such patterns in a system composed of a microresonator nested in an amplifying laser cavity, a scheme recently used to demonstrate laser cavity solitons with high optical efficiency and easy repetition rate control. Utilizing this concept, we study different regimes of Turing patterns, unveiling their formation dynamics and demonstrating their controllability and robustness. By conducting a comprehensive modulational instability study with a mean-field model of the system, we explain the pattern formation in terms of its evolution from background noise, paving the way towards complete self-starting operation. Our theoretical and experimental paper provides a clear pathway for repetition rate control of these waves over both fine (Megahertz) and large (Gigahertz) scales, featuring a fractional frequency nonuniformity better than 710-14 with a 100-ms time gate and without the need for active stabilization.

© 2020 authors. Published by the American Physical Society.

Number of references:64

Main heading:Resonators

Controlled terms:Continuous wave lasers - Fiber lasers - Laser resonators - Mean field theory

Uncontrolled terms:Active stabilization - Formation dynamics - Fractional frequencies - Mean field modeling - Modulational instability - Optical efficiency - Pattern formation - Resonant couplings

Classification code:744 Lasers - 922.2 Mathematical Statistics

Numerical data indexing:Time 1.00e-01s

DOI:10.1103/PhysRevResearch.2.023395

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204109315351

Title:Optical trapping of single nano-size particles using a plasmonic nanocavity

Authors:Zhang, Jiachen (1); Lu, Fanfan (1); Zhang, Wending (1); Yu, Weixing (2); Zhu, Weiren (3); Premaratne, Malin (4); Mei, Ting (1); Xiao, Fajun (1, 2); Zhao, Jianlin (1)

Author affiliation:(1) MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; (4) Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia

Corresponding author:Zhang, Wending(zhangwd@nwpu.edu.cnemailfjxiao@nwpu.edu.cn)Xiao, Fajun(fjxiao@nwpu.edu.cn)Zhu, Weiren(fjxiao@nwpu.edu.cn)

Source title:Journal of Physics Condensed Matter

Abbreviated source title:J Phys Condens Matter

Volume:32

Issue:47

Issue date:November 11, 2020

Publication year:2020

Article number:475301

Language:English

ISSN:09538984

E-ISSN:1361648X

CODEN:JCOMEL

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:Trapping and manipulating micro-size particles using optical tweezers has contributed to many breakthroughs in biology, materials science, and colloidal physics. However, it remains challenging to extend this technique to a few nanometers particles owing to the diffraction limit and the considerable Brownian motion of trapped nanoparticles. In this work, a nanometric optical tweezer is proposed by using a plasmonic nanocavity composed of the closely spaced silver coated fiber tip and gold film. It is found that the radial vector mode can produce a nano-sized near field with the electric-field intensity enhancement factor over 103 through exciting the plasmon gap mode in the nanocavity. By employing the Maxwell stress tensor formalism, we theoretically demonstrate that this nano-sized near field results in a sharp quasi-harmonic potential well, capable of stably trapping 2 nm quantum dots beneath the tip apex with the laser power as low as 3.7 mW. Further analysis reveals that our nanotweezers can stably work in a wide range of particle-to-tip distances, gap sizes, and operation wavelengths. We envision that our proposed nanometric optical tweezers could be compatible with the tip-enhanced Raman spectroscopy to allow simultaneously manipulating and characterizing single nanoparticles as well as nanoparticle interactions with high sensitivity.

© 2020 IOP Publishing Ltd.

Number of references:45

Main heading:Particle size analysis

Controlled terms:Diffraction - Electric fields - Gold coatings - Laser optics - Nanoparticles - Optical tweezers - Plasmonics - Quantum dot lasers - Semiconductor quantum dots

Uncontrolled terms:Electric field intensities - Harmonic potential well - Maxwell stress tensors - Nanoparticle interaction - Operation wavelength - Silver coated fibers - Tip-enhanced Raman spectroscopy - Trapped nanoparticles

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 744 Lasers - 761 Nanotechnology - 813.2 Coating Materials - 933 Solid State Physics - 951 Materials Science

Numerical data indexing:Power 3.70e-03W, Size 2.00e-09m

DOI:10.1088/1361-648X/abaead

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202208761655

Title:Experimental Investigation of Fiber Scrambling

Title of translation:光纤扰模技术实验研究

Authors:Ye, Huiqi (1, 2); Huang, Kai (3); Xiao, Dong (1, 2); Zhang, Kai (1, 2); Chen, Ping (3); Wei, Ruyi (4)

Author affiliation:(1) Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing; Jiangsu; 210042, China; (2) Key Laboratory of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing Institute of Astronomical Optics & Technology, Nanjing; Jiangsu; 210042, China; (3) Institute of Modern Optics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin; 300350, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi; 710119, China

Corresponding author:Ye, Huiqi(hqye@niaot.ac.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:40

Issue:6

Issue date:March 25, 2020

Publication year:2020

Article number:0606001

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:Radial velocity measurements errors caused by lighting instabilities severely limit the precision improvement in instruments; however, fiber scrambling is an effective method to enhance the stability of instrumental illumination. To provide a reliable experimental reference for the operation of a high resolution spectrograph upgrade and a new high precision radial velocity instrument design, the near field and far field scrambling properties of a single circular fiber, single octagonal fiber, circular-octagonal-circular fiber cascade connection system, double circular fiber scrambler, circular-octagonal hybrid double-fiber scrambler, and double octagonal fiber scrambler were studied in detail. The results showed that the octagonal fiber improved the near field scrambling compared to single circular fiber, the double-fiber scrambler could improve both near field and far field scrambling, and the double octagonal fiber scrambler optimally performed for both near field and far field. Furthermore, the prototypes of the double-fiber scramblers, including ball lens system and twin lens system, were also assessed herein. The throughput was observed to be 55% and 80%, respectively.

© 2020, Chinese Lasers Press. All right reserved.

Number of references:20

Main heading:Fibers

Controlled terms:Instrument errors

Uncontrolled terms:Ball lens - Experimental investigations - High resolution - Lens systems - Near fields - Precision improvement - Radial velocity instruments - Radial velocity measurements

Numerical data indexing:Percentage 5.50e+01%, Percentage 8.00e+01%

DOI:10.3788/AOS202040.0606001

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202508854641

Title:A Model of High-Dimensional Feature Reduction Based on Variable Precision Rough Set and Genetic Algorithm in Medical Image????(Open Access)

Authors:Tao, Zhou (1); Huiling, Lu (2); Hu, Fuyuan (3); Qiu, Shi (4); Cuiying, Wu (5)

Author affiliation:(1) School of Computer Science and Engineering, North Minzu University, Yinchuan; 750021, China; (2) School of Science, Ningxia Medical University, Yinchuan; 750004, China; (3) School of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou; 215009, China; (4) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (5) Human Resources Department, Second Affiliated Hospital of Xiamen Medical College, Xiamen; 361021, China

Corresponding author:Huiling, Lu(lu_huiling@163.com)

Source title:Mathematical Problems in Engineering

Abbreviated source title:Math. Probl. Eng.

Volume:2020

Issue date:2020

Publication year:2020

Article number:7653946

Language:English

ISSN:1024123X

E-ISSN:15635147

Document type:Journal article (JA)

Publisher:Hindawi Limited, 410 Park Avenue, 15th Floor, 287 pmb, New York, NY 10022, United States

Abstract:Aiming at the shortcomings of high feature reduction using traditional rough sets, such as insensitivity with noise data and easy loss of potentially useful information, combining with genetic algorithm, in this paper, a VPRS-GA (Variable Precision Rough Set - Genetic Algorithm) model for high-dimensional feature reduction of medical image is proposed. Firstly, rigid inclusion of the lower approximation is extended to partial inclusion by classification error rate β in the traditional rough set model, and the ability dealing with noise data is improved. Secondly, some factors of feature reduction are considered, such as attribute dependency, attributes reduction length, and gene coding weight. A general framework of fitness function is put forward, and different fitness functions are constructed by using different factors such as weight and classification error rate β. Finally, 98 dimensional features of PET/CT lung tumor ROI are extracted to build decision information table of lung tumor patients. Three kinds of experiments in high-dimensional feature reduction are carried out, using support vector machine to verify the influence of recognition accuracy in different fitness function parameters and classification error rate. Experimental results show that classification accuracy is affected deeply by different weight values under the invariable classification error rate condition and by increasing classification error rate under the invariable weigh value condition. Hence, in order to achieve better recognition accuracy, different problems use suitable parameter combination.

© 2020 Zhou Tao et al.

Number of references:22

Main heading:Approximation algorithms

Controlled terms:Biological organs - Decision tables - Errors - Genetic algorithms - Health - Medical imaging - Rough set theory - Support vector machines - Tumors

Uncontrolled terms:Attributes reduction - Classification accuracy - Classification error rate - Decision information - High dimensional feature - Parameter combination - Recognition accuracy - Variable precision rough sets

Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 723 Computer Software, Data Handling and Applications - 723.1 Computer Programming - 746 Imaging Techniques - 921 Mathematics - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1155/2020/7653946

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold, Green

Accession number:20204409406770

Title:Optical multi-stability in a nonlinear high-order microring resonator filter????(Open Access)

Authors:Jin, Li (1); Di Lauro, Luigi (2, 3); Pasquazi, Alessia (2); Peccianti, Marco (2); Moss, David J. (4); Morandotti, Roberto (3, 5); Little, Brent E. (6); Chu, Sai Tak (1)

Author affiliation:(1) Department of Physics, City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (2) Emergent Photonics (EPic) Laboratory, Department of Physics and Astronomy, University of Sussex, Farmer, Brighton, United Kingdom; (3) Institut National de la Recherche Scientifique (INRS), Centre Énergie, Matériaux et Télécommunications (EMT), Varennes; QC; J3X 1S2, Canada; (4) Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (5) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China; (6) State Key Lab of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Cas, Xi'an, China

Corresponding author:Chu, Sai Tak(saitchu@cityu.edu.hk)

Source title:APL Photonics

Abbreviated source title:APL Photonics

Volume:5

Issue:5

Issue date:May 1, 2020

Publication year:2020

Article number:056106

Language:English

E-ISSN:23780967

Document type:Journal article (JA)

Publisher:American Institute of Physics Inc.

Abstract:We theoretically analyze and experimentally demonstrate optical bi-stability and multi-stability in an integrated nonlinear high-order microring resonator filter based on high-index contrast doped silica glass. We use a nonlinear model accounting for both the Kerr and thermal effects to analyze the instability behavior of the coupled-resonator based filter. The model also accurately predicts the multi-stable behavior of the filter when the input frequency is slightly detuned. To understand the role of the intracavity power distribution, we investigate the detuning of the individual rings of the filter from the optical response with a pump-probe experiment. Such a measurement is performed scanning the filter with a low-power probe beam tuned a few free spectral ranges away from the resonance where the pump is coupled. A comprehensive understanding of the relationship between the nonlinear behavior and the intracavity power distribution for the high-order microring resonator filter will help the design and implementation of future all-optical switching systems using this type of filter.

© 2020 Author(s).

Number of references:42

Main heading:Nonlinear optics

Controlled terms:Optical resonators - Optical switches - Probes - Silica - Stability

Uncontrolled terms:All-optical switching - Design and implementations - Free spectral range - High index contrast - Microring resonator - Multi stabilities - Nonlinear behavior - Pump-probe experiments

Classification code:741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems

DOI:10.1063/5.0002941

Funding details: Number: 725046, Acronym: -, Sponsor: -;Number: 9042663, Acronym: -, Sponsor: -;Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: EP/R043566/1,EP/S001018/1, Acronym: EPSRC, Sponsor: Engineering and Physical Sciences Research Council;Number: -, Acronym: ERC, Sponsor: European Research Council;Number: -, Acronym: -, Sponsor: University of Sussex;Number: XDB24030300, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:The authors acknowledge the support of the EPSRC, Industrial Innovation Fellowship Programme, under Grant No. EP/S001018/1, from INNOVATE UK, project "IOTA" Grant Agreement No. EP/R043566/1 and from the University of Sussex RDF program. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program, Grant Agreement No. 725046. A.P. acknowledges the support of the EPSRC, Industrial Innovation Fellowship Programme, under Grant No. EP/S001018/1, from INNOVATE UK, project "IOTA" Grant Agreement No. EP/R043566/1 and from the University of Sussex RDF program. MP has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program, Grant Agreement No. 725046. S.T.C. acknowledges support from the Research Grant Council of Hong Kong (GRF No. 9042663). B.E.L. acknowledges support from the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB24030300). R.M. is affiliated to 5 as an adjoint faculty and acknowledges funding by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery, and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec and by the Canada Research Chair Program.The authors acknowledge the support of the EPSRC, Industrial Innovation Fellowship Programme, under Grant No. EP/S001018/1, from INNOVATE UK, project "IOTA" Grant Agreement No. EP/R043566/1 and from the University of Sussex RDF program. This project has received funding from the European Research Council (ERC) under the European Union s Horizon 2020 research and innovation program, Grant Agreement No. 725046. A.P. acknowledges the support of the EPSRC, Industrial Innovation Fellowship Programme, under Grant No. EP/S001018/1, from INNOVATE UK, project "IOTA" Grant Agreement No. EP/R043566/1 and from the University of Sussex RDF program. MP has received funding from the European Research Council (ERC) under the European Union s Horizon 2020 research and innovation program, Grant Agreement No. 725046. S.T.C. acknowledges support from the Research Grant Council of Hong Kong (GRF No. 9042663). B.E.L. acknowledges support from the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB24030300). R.M. is affiliated to 5 as an adjoint faculty and acknowledges funding by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic, Discovery, and Acceleration Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec and by the Canada Research Chair Program.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20192206978505

Title:New Algorithm of Response Curve for Fitting HDR Image

Authors:Qiu, Shi (1); Li, Xuemei (2); Huang, Yongdong (3); Li, Zhengzhou (4); Chen, Xun (5); Chen, Yuyang (2)

Author affiliation:(1) Key Lab. of Spectral Imaging Technol. CAS xi'An Inst. of Opt. and Prec. Mechanics Chinese Acad. of Sci., Xi'an; 710119, China; (2) College of Information Science and Technology Chengdu University of Technology, Chengdu; 610059, China; (3) Institute of Image Processing and Understanding North Minzu University, Yinchuan; 750021, China; (4) College of Communication Engineering Chongqing University, Chongqing; 400044, China; (5) Department of Electronic Science and Technology University of Science and Technology of China, Hefei; 230027, China

Corresponding author:Li, Xuemei(a13579xm@sina.com)

Source title:International Journal of Pattern Recognition and Artificial Intelligence

Abbreviated source title:Int J Pattern Recognit Artif Intell

Volume:34

Issue:1

Issue date:January 1, 2020

Publication year:2020

Article number:2054001

Language:English

ISSN:02180014

CODEN:IJPIEI

Document type:Journal article (JA)

Publisher:World Scientific

Abstract:Based on the process of generating HDR images from LDR image sequences with different light exposures in the same scene, a new fitting method of camera response curves is proposed to solve the problem that the boundary of the fitting algorithm of camera response curves will be blurred and it is difficult to determine and verify the accuracy of the fitting curves. The optimal response curve is fitted by increasing LDR images step by step through considering the pixel value and texture characteristics. In order to validate the fitting effect of curves, we compare the photographed images and the real images in different time intervals on the basis of HDR images and response curves. We use RGB and gray image experiments to compare the current mainstream algorithms and the accuracy of our proposed algorithm can reach 96%, which has robustness.

© 2020 World Scientific Publishing Company.

Number of references:32

Main heading:Image texture

Controlled terms:Cameras - Curve fitting - Textures

Uncontrolled terms:Camera response - Exposure-time - High dynamic range - Low dynamic range - Texture features

Classification code:723.2 Data Processing and Image Processing - 742.2 Photographic Equipment - 921.6 Numerical Methods

Numerical data indexing:Percentage 9.60e+01%

DOI:10.1142/S0218001420540014

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204409407346

Title:Effect of annealing on the electrophysical properties of CdTe/HgCdTe passivation interface by the capacitance-voltage characteristics of the metal-insulator-semiconductor structures????(Open Access)

Authors:Wang, Xi (1); He, Kai (2); Chen, Xing (1); Li, Yang (3); Lin, Chun (1); Zhang, Qinyao (1); Ye, Zhenhua (1); Xin, Liwei (2); Gao, Guilong (2); Yan, Xin (2); Wang, Gang (2, 4); Liu, Yiheng (2, 4); Wang, Tao (2); Tian, Jinshou (2)

Author affiliation:(1) Key Laboratory of Infrared Imaging Materials and Detectors, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai; 200083, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an, Shaanxi; 710119, China; (3) Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-Ku, Tokyo; 153-8505, Japan; (4) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:He, Kai(hekai@opt.ac.cn)

Source title:AIP Advances

Abbreviated source title:AIP Adv.

Volume:10

Issue:10

Issue date:October 1, 2020

Publication year:2020

Article number:105102

Language:English

E-ISSN:21583226

Document type:Journal article (JA)

Publisher:American Institute of Physics Inc.

Abstract:The capacitance-voltage characteristics of metal-insulator-semiconductor structures based on Hg1-xCdxTe (x = 0.218) with CdTe passivation are studied before and after the passivation annealing process. We found that after vacuum annealing at 300 °C for 24 h, the micromorphology of the passivation layer was significantly improved, and as the fixed charge density decreased from 1.3 × 1012 cm-2 to 1.0 × 1010 cm-2, the fast surface state density decreased from 2 × 1013 cm-2 eV-1 to 3 × 1012 cm-2 eV-1, with a minimum value of 1.2 × 1011 cm-2 eV-1. From these findings, combined with the secondary ion mass spectroscopy analysis, we conclude that the annealing process propagates an equivalent electrical surface for CdTe/HgCdTe uniformly from the principal physical interface to the inside of the bulk material, effectively improving the characteristics of the CdTe passivation layer.

© 2020 Author(s).

Number of references:13

Main heading:Passivation

Controlled terms:Annealing - Cadmium telluride - Capacitance - II-VI semiconductors - Metal analysis - Metal insulator boundaries - MIS devices - Secondary ion mass spectrometry - Semiconducting cadmium telluride - Semiconductor alloys - Semiconductor insulator boundaries

Uncontrolled terms:Capacitance voltage characteristic - Effect of annealing - Electrophysical properties - Fixed charge density - Metal insulator semiconductor structures - Physical interface - Secondary ion mass spectroscopy - Surface state density

Classification code:537.1 Heat Treatment Processes - 539.2.1 Protection Methods - 701.1 Electricity: Basic Concepts and Phenomena - 712.1.2 Compound Semiconducting Materials - 714.2 Semiconductor Devices and Integrated Circuits - 804 Chemical Products Generally

Numerical data indexing:Temperature 5.73e+02K, Time 8.64e+04s

DOI:10.1063/5.0021073

Funding details: Number: 2019JQ-930, Acronym: -, Sponsor: -;Number: IIMDKFJJ-180, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;

Funding text:This work was supported by the Key laboratory of Infrared Imaging Materials and Devices of Chinese Academy of Sciences (Grant No. IIMDKFJJ-180) and the Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2019JQ-930).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20194307584549

Title:A Contribution Algorithm from LDRI to HDRI

Authors:Luo, Junsong (1); Qiu, Shi (2); Jiang, Yizhang (3); Cheng, Keyang (4); Ye, Huping (5); Zhang, Mingjin (6)

Author affiliation:(1) College of Information Science and Technology, Chengdu University of Technology, Chengdu; 610059, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) School of Digital Media, Jiangnan University, Wuxi; 214122, China; (4) School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang; 212000, China; (5) State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing; 100101, China; (6) State Key Laboratory of Integrated Services Networks, School of Telecommunications Engineering, Xidian University, Xi'an; 710071, China

Corresponding author:Qiu, Shi(qiushi215@163.comemailyehp@igsnrr.ac.cn)Ye, Huping(yehp@igsnrr.ac.cn)

Source title:International Journal of Pattern Recognition and Artificial Intelligence

Abbreviated source title:Int J Pattern Recognit Artif Intell

Volume:34

Issue:7

Issue date:June 30, 2020

Publication year:2020

Article number:2059025

Language:English

ISSN:02180014

CODEN:IJPIEI

Document type:Journal article (JA)

Publisher:World Scientific

Abstract:High dynamic range image (HDRI) which is combined with low dynamic range image (LDRI) needs to be mapped to a low dynamic area to display. In the process of mapping, it is impossible to determine the contribution of low dynamic image sequences in the display images, so that it results in a problem that the low dynamic images cannot be accurately selected. In this paper, for the first time, a contribution algorithm from LDRI to HDRI according to the corresponding response curve of the camera is proposed.

© 2020 World Scientific Publishing Company.

Number of references:39

Main heading:Image processing

Controlled terms:Cameras - Display devices

Uncontrolled terms:Camera response - contribution - Display image - Dynamic images - High dynamic range images - Low dynamic range images - Response curves

Classification code:722.2 Computer Peripheral Equipment - 742.2 Photographic Equipment

DOI:10.1142/S0218001420590259

Funding details: Number: 61170126, Acronym: -, Sponsor: -;Number: LSIT201717G, Acronym: -, Sponsor: -;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2016B23, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:This work is supported by Light of West China of Chinese Academy of Sciences (No. XAB2016B23), The Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences (No. LSIT201717G), and the National Science Foundation of China (NFSC) (No. 61170126).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204409441494

Title:Photonic RF Arbitrary Waveform Generator Based on a Soliton Crystal Micro-Comb Source

Authors:Tan, Mengxi (1); Xu, Xingyuan (1, 2); Boes, Andreas (3); Corcoran, Bill (4); Wu, Jiayang (1); Nguyen, Thach G. (3); Chu, Sai T. (5); Little, Brent E. (6); Morandotti, Roberto (7, 8); Mitchell, Arnan (3); Moss, David J. (1)

Author affiliation:(1) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) Electro-Photonics Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia; (3) School of Engineering, RMIT University, Melbourne; VIC; 3001, Australia; (4) Department of Electrical and Computer System Engineering, Monash University, Clayton; VIC; 3168, Australia; (5) Department of Physics, City University of Hong Kong, Hong Kong, Hong Kong; (6) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 110015, China; (7) INRS-Énergie, Matériaux et Télécommunications, Varennes; QC; J3X 1S2, Canada; (8) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Corresponding author:Moss, David J.(dmoss@swin.edu.au)

Source title:Journal of Lightwave Technology

Abbreviated source title:J Lightwave Technol

Volume:38

Issue:22

Issue date:November 15, 2020

Publication year:2020

Pages:6221-6226

Article number:9142348

Language:English

ISSN:07338724

E-ISSN:15582213

CODEN:JLTEDG

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., United States

Abstract:We report a photonic-based radio frequency (RF) arbitrary waveform generator (AWG) using a soliton crystal micro-comb source with a free spectral range (FSR) of 48.9 GHz. The comb source provides over 80 wavelengths, or channels, that we use to successfully achieve arbitrary waveform shapes including square waveforms with a tunable duty ratio ranging from 10% to 90%, sawtooth waveforms with a tunable slope ratio of 0.2 to 1, and a symmetric concave quadratic chirp waveform with an instantaneous frequency of sub GHz. We achieve good agreement between theory and experiment, validating the effectiveness of this approach towards realizing high-performance, broad bandwidth, nearly user-defined RF waveform generation.

© 1983-2012 IEEE.

Number of references:63

Main heading:Waveform analysis

Controlled terms:Crystals - Solitons

Uncontrolled terms:Arbitrary waveform - Arbitrary waveform generator - Broad bandwidths - Free spectral range - Instantaneous frequency - Radio frequencies - Sawtooth waveform - Waveform generation

Classification code:933.1 Crystalline Solids

Numerical data indexing:Frequency 4.89e+10Hz, Percentage 1.00e+01% to 9.00e+01%

DOI:10.1109/JLT.2020.3009655

Funding details: Number: DP150104327, Acronym: ARC, Sponsor: Australian Research Council;Number: XDB24030000, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;

Funding text:Manuscript received May 12, 2020; revised June 22, 2020; accepted July 13, 2020. Date of publication July 16, 2020; date of current version November 16, 2020. This work was supported by the Australian Research Council Discovery Projects Program under Grant DP150104327. Brent E. Little was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences under Grant XDB24030000. The work of Roberto Morandotti was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic and Discovery Grants Schemes, in part by the MESI PSR-SIIRI Initiative in Quebec, and in part by the Canada Research Chair Program. (Corresponding author: David J. Moss.) Mengxi Tan, Jiayang Wu, and David J. Moss are with the Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC 3122, Australia (e-mail: mengxitan@swin.edu.au; jiayangwu@swin.edu.au; dmoss@swin.edu.au).RM acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic and Discovery Grants Schemes, by the MESI PSR-SIIRI Initiative in Quebec, and by the Canada Research Chair Program.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204509463366

Title:Numerical investigation of radiation ablation and acceleration of high-density carbon foils????(Open Access)

Authors:Chen, Peng (1, 2, 3); Hu, Ronghao (1, 2, 3); Zhou, Hao (1, 2, 3); Tao, Zhihao (1, 2, 3); Gao, Guilong (4); He, Kai (4); Wang, Tao (4); Tian, Jinshou (4); Yi, Tao (5); Lv, Meng (1, 2, 3)

Author affiliation:(1) College of Physics, Sichuan University, Chengdu; 610065, China; (2) Key Laboratory of High Energy Density Physics and Technology, Ministry of Education, Sichuan University, Chengdu; 610064, China; (3) Key Laboratory of Radiation Physics and Technology, Ministry of Education, Sichuan University, Chengdu; 610064, China; (4) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; Shanxi; 710119, China; (5) Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang Sichuan; 621900, China

Corresponding author:Hu, Ronghao(ronghaohu@scu.edu.cn)

Source title:Laser and Particle Beams

Abbreviated source title:Laser Part Beams

Volume:38

Issue:4

Issue date:December 2020

Publication year:2020

Pages:239-243

Language:English

ISSN:02630346

E-ISSN:1469803X

CODEN:LPBEDA

Document type:Journal article (JA)

Publisher:Cambridge University Press

Abstract:The ablation and acceleration of diamond-like high-density carbon foils irradiated by thermal X-ray radiations are investigated with radiation hydrodynamics simulations. The time-dependent front of the ablation wave is given numerically for radiation temperatures in the range of 100-300 eV. The mass ablation rates and ablation pressures can be derived or implied from the coordinates of ablation fronts, which agree well with reported experiment results of high-density carbon with radiation temperatures Trad in the range of 160-260 eV. It is also found that the scaling law for ablation rates does not apply to Trad above 260 eV. The trajectories of targets and hydrodynamic efficiencies for different target thicknesses can be derived from the coordinates of ablation fronts using a rocket model and the results agree well with simulations. The peak hydrodynamic efficiencies of the acceleration process are investigated for different foil thicknesses and radiation temperatures. Higher radiation temperatures and target thicknesses result in higher hydrodynamic efficiencies. The simulation results are useful for the design of fusion capsules.

Copyright © The Author(s) 2020. Published by Cambridge University Press.

Number of references:15

Main heading:Ablation

Controlled terms:Carbon - Efficiency - Hydrodynamics - Radiation - Rockets

Uncontrolled terms:Ablation pressure - Acceleration process - Hydrodynamic efficiency - Mass ablation rates - Numerical investigations - Radiation ablations - Radiation hydrodynamics simulation - Radiation temperature

Classification code:641.2 Heat Transfer - 654.1 Rockets and Missiles - 804 Chemical Products Generally - 913.1 Production Engineering

Numerical data indexing:Electron_Volt 1.00e+02eV to 3.00e+02eV, Electron_Volt 1.60e+02eV to 2.60e+02eV, Electron_Volt 2.60e+02eV

DOI:10.1017/S0263034620000336

Funding details: Number: 0030914153004, Acronym: -, Sponsor: -;Number: 11575166,71705255, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: SCU, Sponsor: Sichuan University;

Funding text:We would like to acknowledge the authors of MULTI-IFE, R. Ramis and J. Meyer-ter-Vehn. This work was supported by the National Natural Science Foundation of China (Nos. 11575166 and 71705255) and Post-doctoral Funds of Personnel Department-Interdisciplinary Innovation Training Project (0030914153004) of Sichuan University.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20203209018551

Title:Cross-Domain Brain CT Image Smart Segmentation via Shared Hidden Space Transfer FCM Clustering

Authors:Xia, Kaijian (1); Yin, Hongsheng (2); Jin, Yong (3); Qiu, Shi (4); Zhao, Hongru (5)

Author affiliation:(1) Changshu No. 1 People's Hospital, Shuyuan road, Changshu, Jiangsu; 215500, China; (2) School of Information and Control Engineering, China University of Mining and Technology, Daxue road, Xuzhou, Jiangsu; 221116, China; (3) School of Computer Science and Engineering, Changshu Institute of Technology, 99 South Third Ring Road, Changshu, Jiangsu; 215500, China; (4) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 information Avenue, Xi'an, Shanxi; 710119, China; (5) Department of Neurology, First Affiliated Hospital, Soochow University, 899 Pinghai Road, Suzhou, Jiangsu; 215006, China

Corresponding author:Xia, Kaijian(xiakaijian@163.com)

Source title:ACM Transactions on Multimedia Computing, Communications and Applications

Abbreviated source title:ACM Trans. Multimedia Comput. Commun. Appl.

Volume:16

Issue:2s

Issue date:July 2020

Publication year:2020

Article number:61

Language:English

ISSN:15516857

E-ISSN:15516865

Document type:Journal article (JA)

Publisher:Association for Computing Machinery

Abstract:Clustering is an important issue in brain medical image segmentation. Original medical images used for clinical diagnosis are often insufficient for clustering in the current domain. As there are sufficient medical images in the related domains, transfer clustering can improve the clustering performance of the current domain by transferring knowledge across the related domains. In this article, we propose a novel shared hidden space transfer fuzzy c-means (FCM) clustering called SHST-FCM for cross-domain brain computed tomography (CT) image segmentation. SHST-FCM projects both the data samples of the source domain and target domain into the shared hidden space, such that the distributions of the two domains are as close as possible. In the learned shared subspace, the data samples of the source domain serve as the auxiliary knowledge to aid the clustering process in the target domain. Extensive experiments on brain CT medical image datasets indicate the effectiveness of the proposed method.

© 2020 ACM.

Number of references:44

Main heading:Computerized tomography

Controlled terms:Brain - Clustering algorithms - Diagnosis - Image enhancement - Image segmentation - Medical imaging

Uncontrolled terms:Clinical diagnosis - Clustering process - FCM clustering - Fuzzy C means clustering - Image datasets - Shared hidden spaces - Shared subspaces - Target domain

Classification code:461.1 Biomedical Engineering - 461.6 Medicine and Pharmacology - 723.5 Computer Applications - 903.1 Information Sources and Analysis

DOI:10.1145/3357233

Funding details: Number: H2018071, Acronym: -, Sponsor: -;Number: 19ST0205, Acronym: JU, Sponsor: Jiangnan University;

Funding text:This work was supported in part by the Jiangsu Committee of Health on the subject (No. H2018071), and by the open Fund Project of Jiangsu Key Laboratory of Media Design and Software Technology (Jiangnan University) under Grant 19ST0205. Authors’ addresses: K. Xia (corresponding author), Changshu No. 1 People’s Hospital, Shuyuan road, Changshu, Jiangsu 215500, People’s Republic of China; email: xiakaijian@163.com; H. Yin, School of Information and Control Engineering, China University of Mining and Technology, Daxue road, Xuzhou, Jiangsu 221116, People’s Republic of China; email: xuzhouyhs@sina.com; Y. Jin, School of Computer Science and Engineering, Changshu Institute of Technology, 99 South Third Ring Road, Changshu, Jiangsu 215500, People’s Republic of China; email: jinyong@cslg.edu.cn; S. Qiu, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 information Avenue, Xi’an, Shanxi 710119, People’s Republic of China; email: qiushi215@163.com; H. Zhao, Department of Neurology, The first affiliated Hospital of Soochow University, 899 Pinghai Road, Suzhou, Jiangsu 215006, People’s Republic of China; email: tiantan11@163.com. Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from permissions@acm.org. © 2020 Association for Computing Machinery. 1551-6857/2020/06-ART61 $15.00 https://doi.org/10.1145/3357233

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205109635301

Title:Real-time continuous calibration method for an ultraviolet camera

Authors:Wu, Kuijun (1); Feng, Yutao (2); Xiong, Yuanhui (3, 4); Duan, Weimin (3, 4); Yu, Guangbao (3, 4); Li, Faquan (3)

Author affiliation:(1) School of Opto-Electronic Information Science and Technology, Yantai University, Yantai; 264005, China; (2) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (3) State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy of Precision Measurement Science and Technology, Chinese Academy of Sciences-Wuhan National Laboratory for Optoelectronics, Wuhan; 430071, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Li, Faquan(lifaquan@wipm.ac.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:45

Issue:24

Issue date:December 15, 2020

Publication year:2020

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:The accuracy of SO2 cameras is significantly determined by the ability to obtain an accurate calibration. This work presents a real-time continuous calibration method for SO2 cameras with a moderate resolution spectrometer by taking realistic radiative transfer into account. The effectiveness and accuracy of the proposed method have been verified through simulations and experiments. The calibration error can be reduced by about 20–80% compared with the commonly used cell calibration, especially for situations of long distance, poor visibility, or optically thick plumes.

© 2020 Optical Society of America

Number of references:21

Main heading:Calibration

Controlled terms:Cameras - Sulfur dioxide

Uncontrolled terms:Calibration error - Continuous calibrations - Moderate resolution - Poor visibility - Real time

Classification code:742.2 Photographic Equipment - 804.2 Inorganic Compounds

DOI:10.1364/OL.410635

Funding details: Number: 2017YFC0211900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 41975039,61705253, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Funding. National Natural Science Foundation of China (41975039, 61705253); National Key Research and Development Program of China (2017YFC0211900).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204209357447

Title:Designing time and frequency entanglement for generation of high-dimensional photon cluster states

Authors:Roztocki, Piotr (1); Chemnitz, Mario (1); Maclellan, Benjamin (1); Sciara, Stefania (1, 2); Reimer, Christian (1, 3); Islam, Mehedi (1); Cortes, Luis Romero (1); Zhang, Yanbing (1); Fisher, Bennet (1); Loranger, Sebastien (5); Kashyap, Raman (5, 6); Cino, Alfonso (2); Chu, Sai T. (7); Little, Brent E. (8); Moss, David J. (9); Caspani, Lucia (10); Munro, William J. (11, 12); Azana, Jose (1); Kues, Michael (1, 4); Morandotti, Roberto (1, 13)

Author affiliation:(1) Institut National de la Recherche Scientifique (INRS-EMT), Varennes, Canada; (2) University of Palermo, Department of Engineering, Palermo, Italy; (3) HyperLight Corporation, Cambridge, United States; (4) School of Engineering, University of Glasgow, Glasgow, United Kingdom; (5) Engineering Physics Department, Polytechnique Montreal, Montreal, Canada; (6) Electrical Engineering Department, Polytechnique Montreal, Montreal, Canada; (7) Department of Physics and Material Science, City University of Hong Kong, Hong Kong; (8) State Key Laboratory of Transient Optics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (9) Centre for Micro Photonics, Swinburne University of Technology, Hawthorn, Australia; (10) Institute of Photonics, Department of Physics, University of Strathclyde, Glasgow, United Kingdom; (11) NTT Basic Research Laboratories, NTT Corporation, Kanagawa, Japan; (12) National Institute of Informatics, Tokyo, Japan; (13) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, China

Corresponding author:Morandotti, Roberto(morandotti@emt.inrs.ca)

Source title:International Conference on Transparent Optical Networks

Abbreviated source title:Int. Conf.Transparent Opt. Networks

Volume:2020-July

Part number:1 of 1

Issue title:2020 22nd International Conference on Transparent Optical Networks, ICTON 2020

Issue date:July 2020

Publication year:2020

Article number:9203265

Language:English

E-ISSN:21627339

ISBN-13:9781728184234

Document type:Conference article (CA)

Conference name:22nd International Conference on Transparent Optical Networks, ICTON 2020

Conference date:July 19, 2020 - July 23, 2020

Conference location:Bari, Italy

Conference code:163275

Sponsor:European Optical Society (EOS) Italian Branch; Societa Italiana di Ottica e Fotonica (SIOF)

Publisher:IEEE Computer Society

Abstract:The development of quantum technologies for quantum information science demands the realization and precise control of complex (multipartite and high dimensional) entangled systems on practical and scalable platforms. Quantum frequency combs (QFCs) generated via spontaneous four-wave mixing in integrated microring resonators represent a powerful tool towards this goal. They enable the generation of complex photon states within a single spatial mode as well as their manipulation using standard fiber-based telecommunication components. Here, we review recent progress in the development of QFCs, with a focus on our results that highlight their importance for the realization of complex quantum states. In particular, we outline our work on the use of integrated QFCs for the generation of high-dimensional multipartite optical cluster states and their unidirectional processing, being at the core of measurement-based quantum computation. These results confirm that engineering the time-frequency entanglement properties of QFC may provide a stable, practical, low-cost, and established platform for the development of near-future quantum devices for out-of-the-lab applications, ranging from practical quantum computing to more secure communications.

© 2020 IEEE.

Number of references:26

Main heading:Quantum entanglement

Controlled terms:Complex networks - Cost engineering - Fiber optic networks - Four wave mixing - Mixer circuits - Photons - Quantum computers - Quantum cryptography - Quantum optics - Transparent optical networks

Uncontrolled terms:Entanglement properties - Measurement-based quantum computation - Microring resonator - Optical cluster state - Quantum information science - Quantum technologies - Spontaneous four-wave mixing - Time and frequencies

Classification code:713.3 Modulators, Demodulators, Limiters, Discriminators, Mixers - 722 Computer Systems and Equipment - 741.1.2 Fiber Optics - 911 Cost and Value Engineering; Industrial Economics - 931.3 Atomic and Molecular Physics - 931.4 Quantum Theory; Quantum Mechanics

DOI:10.1109/ICTON51198.2020.9203265

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201208314004

Title:Improving timing performance of double-ended readout in TOF-PET detectors????(Open Access)

Authors:Guo, L. (1, 2, 3, 4); Tian, J. (2, 4); Chen, P. (2, 4); Derenzo, S.E. (1); Choong, W.-S. (1)

Author affiliation:(1) Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley; CA; 94720, United States; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi'an; 710119, China; (3) College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, No. 19 Yuquan Road, Beijing; 100049, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, No. 92 Wucheng Road, Taiyuan; 030006, China

Corresponding author:Choong, W.-S.(wschoong@lbl.gov)

Source title:Journal of Instrumentation

Abbreviated source title:J. Instrum.

Volume:15

Issue:1

Issue date:January 2, 2020

Publication year:2020

Article number:P01003

Language:English

E-ISSN:17480221

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:Scintillation crystals of 20 mm length or longer are needed for clinical time-of-flight positron emission tomography (TOF-PET) to ensure effective detection efficiency for gamma photons. However, the use of long crystals would deteriorate the key performance of TOF-PET detectors, time and spatial resolution, because of the variations in the travel times of the photons in crystals and the effects of parallax errors. In this work, we studied double-ended readout TOF-PET detectors based on coupling a long scintillation crystal to SiPMs at both ends for correcting the depth-dependent effects to improve the coincidence time resolution (CTR). In particular, we focused our attention to analyze timing performance using different correction methods, including trigger times of the individual photodetectors at both ends of the crystal, the simple average of the trigger times, and the weighted average based on the inverse variances of the depth-dependent corrected trigger times. For a 3 mm × 3 mm × 25 mm unpolished lutetium fine silicate (LFS) crystal with double-ended readout and practical head-on irradiation, a CTR of 246 ps FWHM can be achieved using depth-dependent timing-correction and weighted average time method compared to 280 ps FWHM using the conventional simple average time method and 393 ps FWHM using the conventional single-ended readout. The results show that the depth-dependent timing-correction and weighted average time method in double-ended readout can effectively correct for the trigger time variations in TOF-PET detector utilizing long unpolished crystals, resulting in an improvement in the CTR of as much as 37% compared to single-ended readout.

© 2020 IOP Publishing Ltd and Sissa Medialab.

Number of references:20

Main heading:Positron emission tomography

Controlled terms:Crystals - Geometrical optics - Inverse problems - Lutetium compounds - Photons - Scintillation - Silicates - Single photon emission computed tomography - Statistical methods - Timing circuits

Uncontrolled terms:Coronary ct angiographies - Detection efficiency - Instrumentation for gamma-electron therapy - Scintillation crystals - Spatial resolution - Timing corrections - Timing performance - Weighted averages

Classification code:713.4 Pulse Circuits - 741.1 Light/Optics - 922.2 Mathematical Statistics - 931.3 Atomic and Molecular Physics - 933.1 Crystalline Solids

Numerical data indexing:Percentage 3.70e+01%, Size 2.00e-02m, Size 2.50e-02m, Time 2.46e-10s, Time 2.80e-10s, Time 3.93e-10s

DOI:10.1088/1748-0221/15/01/P01003

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20204509464916

Title:Optical frequency comb generation by hybrid mode-locking in a nested cavity scheme

Authors:Fischer, Bennet (1); Rahim, Aadhi A. (1); Rimoldi, Cristina (1); Roztocki, Piotr (1); Lauro, Luigi di (1); Chemnitz, Mario (1); Kovalev, Anton V. (2); Chu, Sai T. (3); Little, Brent E. (4); Moss, David J. (5); Viktorov, Evgeny A. (2); Kues, Michael (6); Morandotti, Roberto (1, 2, 7)

Author affiliation:(1) Institut National de la Recherche Scientifique (INRS-EMT), 1650 Boulevard Lionel-Boulet, Varennes; QC; J3X 1S2, Canada; (2) ITMO University, Birhzevaya Liniya 14, St. Petersburg; 199034, Russia; (3) City University of Hong Kong, Tat Chee Avenue, Hong Kong, Hong Kong; (4) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (5) Centre for Micro Photonics, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (6) Hannover Center for Optical Technologies, Leibniz University Hannover, Nienburger Strasse 1, Hannover; 30167, Germany; (7) University of Electronic Science and Technology of China, Chengdu, Sichuan; 610054, China

Corresponding author:Morandotti, Roberto(morandotti@emt.inrs.ca)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt. InfoBase Conf. Pap

Volume:Part F184-IPRSN 2020

Part number:1 of 1

Issue title:Integrated Photonics Research Silicon and Nanophotonics, IPRSN 2020

Issue date:2020

Publication year:2020

Language:English

ISBN-13:9781943580798

Document type:Conference article (CA)

Conference name:Integrated Photonics Research Silicon and Nanophotonics, IPRSN 2020

Conference date:July 13, 2020 - July 16, 2020

Conference location:Washington, DC, United states

Conference code:143848

Publisher:OSA - The Optical Society

Abstract:We present a hybrid fiber-integrated mode-locking scheme using a microring and active modulation. Nonlinear polarization rotation and phase modulation enable long-term frequency comb generation, and access to higher harmonic mode-locking.

© 2020 The Author(s)

Number of references:8

Main heading:Modulation

Controlled terms:Nanophotonics - Photonics

Uncontrolled terms:Higher harmonics - Hybrid fiber - Hybrid mode-locking - Microrings - Modelocking - Nonlinear polarization rotation - Optical frequency comb generation - Term Frequency

Classification code:741.1 Light/Optics

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204109332448

Title:Measurement of moisture content in lubricating oils of high-speed rail gearbox by Vis-NIR spectroscopy

Authors:Liu, Chenyang (1, 2); X., Tang; T., Yu; T., Wang; Z., Lu; W., Yu

Author affiliation:(1) R&D Center of Precision Instruments and Equipment, Changchun Institute of Optics, Fine Mechanics & Physics, Chinese Academy of Sciences, No. 3888, Dongnanhu Road, Changchun; Jilin, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17, Xinxi Road, Xian; 710119, China

Corresponding author:Yu, Weixing(yuwx@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:224

Issue date:December 2020

Publication year:2020

Article number:165694

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:The moisture content in lubricating oil is one of the most important factors to reflect the health and effectiveness of it, thus to monitor the moisture content in lubricating oil in real time is crucial for high speed rail. In this paper, we developed a compact moisture-content monitoring system based on the visible-near-infrared (Vis-NIR) spectroscopy technology, which was shown to be able to determine the moisture content in lubricating oil in a fast, simple and accurate way. In this system, a reflection mode optical probe was developed for sending and receiving optical signals through the viewport of gear box. By employing the reflection optical probe, one can measure the spectrum of the lubricating oil in a fast way by simply putting the probe on viewport of gear box, and therefore has the potential to realize the real-time monitoring of the status of the lubricating oil. In order to verify the feasibility of the system, both reflection and transmission spectral of lubricating oil were taken. Partial least square regression (PLS) and back propagation neural network (BPNN) algorithms were used to establish the processing model. Modelling results show a good agreement in between two different probing modes. As a result, the effectiveness and reliability of the system have been proved, which provides a simple yet accurate method for real time monitoring the healthy status of the lubricating oil for the safe operation of the high-speed rail.

© 2020 Elsevier GmbH

Number of references:32

Main heading:Lubrication

Controlled terms:Backpropagation - Infrared devices - Lubricating oils - Moisture control - Moisture determination - Near infrared spectroscopy - Probes - Railroad transportation

Uncontrolled terms:Back-propagation neural networks - Monitoring system - Partial least square regression - Real time monitoring - Reflection and transmission - Spectroscopy technology - Vis-NIR spectroscopy - Visible near-infrared

Classification code:433.1 - 607.1 - 607.2 - 723.4 - 944.2

DOI:10.1016/j.ijleo.2020.165694

Funding details: Number: 2017YFC1403700, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 61475156,61361166004, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Key Research and Development Program of China [No. 2017YFC1403700 ]; and the Natural Science Foundation of China [No. 61475156 and No. 61361166004 ].

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009602507

Title:Study on the photometric characteristics of CCR for space autonomous RVD

Authors:Wang, Hu (1, 2); Liu, Jie (1); Xue, Yaoke (1); Liu, Meiying (1, 2); Liu, Yang (1, 2); Lin, Shangmin (1, 2); Wang, Fang (1, 2); Shen, Yang (1, 2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11567

Part number:1 of 1

Issue title:AOPC 2020: Optical Sensing and Imaging Technology

Issue date:2020

Publication year:2020

Article number:1156729

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639553

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Sensing and Imaging Technology, AOPC 2020

Conference date:August 25, 2020 - August 27, 2020

Conference location:Xiamen, China

Conference code:165074

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:In this paper, the photometric characteristics of passively marked corner-cube-reflector-class cooperative targets are studied. The imaging characteristics of corner cube reflector(CCR) are discussed theoretically, and the influencing factors such as surface accuracy, angle error and diffraction effect are analyzed. The reflection uniformity and diffraction characteristics of CCRs with different positions and different precision are simulated and verified. In addition, the influencing factors and control methods of CCR precision are proposed. To the photometric characteristics of cooperative targets, especially the influence of aperture size of cube-corner prism on comprehensive aberration, the transmission surface (bottom surface) on comprehensive aberration was concerned firstly, besides the three reflection surfaces. The conclusion was been drawn that the transmission surface and the three reflection surfaces had most effect on the parallel of emerging beams, and the minimum error was the minimum algebra sum of above four surfaces. It can provide theoretical support for on-orbit services such as companion flight, autonomous rendezvous and docking (RVD).

© 2020 SPIE.

Number of references:7

Main heading:Photometry

Controlled terms:Diffraction - Geometry - Imaging techniques - Manned space flight - Reflection - Transmissions

Uncontrolled terms:Autonomous rendezvous and docking - Cooperative targets - Corner cube reflector - Cube corner prisms - Diffraction characteristics - Diffraction effects - Imaging characteristics - Photometric characteristics

Classification code:602.2 Mechanical Transmissions - 656.1 Space Flight - 746 Imaging Techniques - 921 Mathematics - 941.4 Optical Variables Measurements

DOI:10.1117/12.2579799

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580472

Title:Research on influencing factors of natural frequency of shafting

Authors:Xiaodong, Chen (1, 2); Youjin, Xie (1); Zhiguo, Li (1, 2); Wei, Hao (1, 2); Xiong, Gao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11570

Part number:1 of 1

Issue title:AOPC 2020: Telescopes, Space Optics, and Instrumentation

Issue date:2020

Publication year:2020

Article number:115700F

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639614

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Telescopes, Space Optics, and Instrumentation, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165102

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Solar Array Drive Assembly(SADA) is a core component of high-power and long-life satellites, and the shafting is an important part of SADA. Its vibration characteristics analysis is very important in structural design and dynamic analysis. The paper theoretically derived and calculated the natural frequency of the shaft system under the action of bearing preload and span, and established a corresponding finite element simulation model in ANSYS. It is concluded that the natural frequency of the shafting increases with the increase of the bearing preload and the span, and the influence of the bearing span is more significant.

© 2020 SPIE. All rights reserved.

Number of references:11

Main heading:Vibration analysis

Controlled terms:Natural frequencies - Solar cell arrays - Solar power satellites - Structural design - Telescopes

Uncontrolled terms:Core components - Design and dynamics - Finite element simulation model - High power - Long life - Shaft system - Solar arrays - Vibration characteristics analysis

Classification code:408.1 Structural Design, General - 655.2 Satellites - 702.3 Solar Cells

DOI:10.1117/12.2579508

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909589265

Title:Blood pressure evaluation based on photoplethysmography using deep learning

Authors:Xiaoxiao, Sun (1, 2); Liang, Zhou (2); Zhaohui, Liu (2); Jiangjun, Yu (1, 2); Wenlong, Qiao (1, 2)

Author affiliation:(1) University of Chinese Academy of Sciences, Beijing; 100049, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China

Corresponding author:Liang, Zhou(zhouliang@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11566

Part number:1 of 1

Issue title:AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics

Issue date:2020

Publication year:2020

Article number:115660X

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639539

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Spectroscopy and Imaging; and Biomedical Optics, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165073

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:In recent years, the number of patients with hypertension has increased. Hypertension is an invisible killer. Long-term hypertension can cause a series of cardiovascular diseases such as angina pectoris, stroke, and heart failure. Therefore, early evaluation and grade assessment of blood pressure (BP) are essential to human health. The seventh report of the National Joint Committee for the Prevention, Detection, Evaluation, and Treatment of Hypertension in the United States (JNC7) classified BP levels into normotension (NT), prehypertension (PHT) and hypertension (HT). In this paper, we adopted a deep learning model (ResNet18) based on the ensemble empirical mode decomposition (EEMD) and the Hilbert Transform (HT) to predict the risk level of BP only using photoplethysmography (PPG) signals. We collected 582 data records from the Multiparameter Intelligent Monitoring in Intensive Care database (MIMIC), and each file contained arterial BP signals as the labels for inputs and the corresponding PPG signals as the inputs. Besides, the last fully connected layer of the model was initialized. We conducted three classification experiments: HT vs. NT, HT vs. PHT, and (HT + PHT) vs. NT, the F1 score of these three classification experiments is 88.03%, 70.94%, and 84.88%, respectively. A quick and accessible noninvasive BP evaluation method was offered to low- and middle-income countries.

© 2020 SPIE. All rights reserved.

Number of references:18

Main heading:Deep learning

Controlled terms:Backpropagation - Biomedical signal processing - Blood - Blood pressure - Cardiology - Mathematical transformations - Photoplethysmography - Spectroscopy

Uncontrolled terms:Cardio-vascular disease - Early evaluation - Ensemble empirical mode decompositions (EEMD) - Hilbert transform - Intelligent monitoring - Low and middle income countries - Photoplethysmography (PPG) - Pressure evaluation

Classification code:461 Bioengineering and Biology - 716.1 Information Theory and Signal Processing - 723.4 Artificial Intelligence - 921.3 Mathematical Transformations

Numerical data indexing:Percentage 7.09e+01%, Percentage 8.49e+01%, Percentage 8.80e+01%

DOI:10.1117/12.2576841

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202308785912

Title:Spin momentum-dependent orbital motion????(Open Access)

Authors:Yan, Shaohui (1); Li, Manman (1); Liang, Yansheng (2); Cai, Yanan (1); Yao, Baoli (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Shaanxi Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Science, Xi'An Jiaotong University, Xi'an, China

Corresponding author:Yan, Shaohui(shaohuiyan@opt.ac.cn)

Source title:New Journal of Physics

Abbreviated source title:New J. Phys.

Volume:22

Issue:5

Issue date:May 2020

Publication year:2020

Article number:053009

Language:English

ISSN:13672630

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:We present a theoretic analysis on (azimuthal) spin momentum-dependent orbital motion experienced by particles in a circularly-polarized annular focused field. Unlike vortex phase-relevant (azimuthal) orbital momentum flow whose direction is specified by the sign of topological charge, the direction of (azimuthal) spin momentum flow is determined by the product of the field's polarization ellipticity and radial derivative of field intensity. For an annular focused field with a definite polarization ellipticity, the intensity's radial derivative has opposite signs on two sides of the central ring (intensity maximum), causing the spin momentum flow to reverse its direction when crossing the central ring. When placed in such a spin momentum flow, a probe particle is expected to response to this flow configuration by changing the direction of orbital motion as it traversing from one side to the other. The reversal of the particle's orbital motion is a clear sign that spin momentum flow can affect particles' orbital motion alone even without orbital momentum flow. More interestingly, for dielectric particles the spin momentum-dependent orbital motion tends to be 'negative', i.e., in the opposite direction of the spin momentum flow. This arises mainly because of spin-orbit interaction during the scattering process. For the purpose of experimental observation, we suggest the introduction of an auxiliary radially-polarized illumination to adjust the particle's radial equilibrium position, for the radial gradient force of the circularly-polarized annular focused field tends to constrain the particle at the ring of intensity maximum.

© 2020 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft.

Number of references:43

Main heading:Momentum

Controlled terms:Circular polarization - Spin orbit coupling

Uncontrolled terms:Circularly polarized - Dielectric particles - Equilibrium positions - Flow configurations - Radially polarized - Spin orbit interactions - Theoretic analysis - Topological charges

Classification code:711 Electromagnetic Waves - 931.1 Mechanics

DOI:10.1088/1367-2630/ab7edd

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20204909580488

Title:The athermalization design of an airborne all-day star sensor optical system

Authors:Zhou, Canglong (1, 2); Wang, Hu (1, 2); Xue, Yaoke (1); Shen, Yang (1); Pan, Yue (1, 2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11570

Part number:1 of 1

Issue title:AOPC 2020: Telescopes, Space Optics, and Instrumentation

Issue date:2020

Publication year:2020

Article number:115700V

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639614

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Telescopes, Space Optics, and Instrumentation, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165102

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:With the continuous development of navigation technology, celestial navigation system has gradually become the essential of celestial navigation system with its advantages of autonomy is strong, good concealment and high precision. The key component of the astronomical navigation system is the all-day star sensor. With the improvement of navigation accuracy, higher requirements have been put forward for the design of all-day star sensor, which is required to be able to work normally within 24 hours. The temperature range of the star sensor working on the airborne platform is very wide, and the temperature has a great impact on the imaging performance of the star sensor, thus affecting the positioning accuracy of navigation. Therefore, it is of great practical significance to ensure that its optical performance does not change within such a wide range of temperature, so as to significantly improve its navigation and positioning accuracy.

© 2020 SPIE. All rights reserved.

Number of references:7

Main heading:Stars

Controlled terms:Navigation systems - Optical systems - Telescopes

Uncontrolled terms:Celestial Navigation System - Continuous development - Imaging performance - Navigation accuracy - Navigation and positioning - Navigation technology - Optical performance - Positioning accuracy

Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 741.3 Optical Devices and Systems

Numerical data indexing:Time 8.64e+04s

DOI:10.1117/12.2580288

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203409077155

Title:Preparation and properties of Co0.85Se/RGO composite counter electrodes for quantum-dot-sensitized solar cells

Authors:Zhang, Maolin (1); Li, Jing (1); Nie, Zhiqiang (2); Zhang, Dongyan (1); Yan, Yangxi (1); Li, Zhimin (1)

Author affiliation:(1) School of Advanced Materials and Nanotechnology, Xidian University, Xi'an; 710071, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Zhang, Maolin(mlzhang@xidian.edu.cn)

Source title:Journal of Optoelectronics and Advanced Materials

Abbreviated source title:J. Optoelectron. Adv. Mat.

Volume:22

Issue:1-2

Issue date:January 2020

Publication year:2020

Pages:23-28

Language:English

ISSN:14544164

Document type:Journal article (JA)

Publisher:National Institute of Optoelectronics

Abstract:Counter electrodes (CEs) are fundamentally important components of quantum-dot-sensitized solar cells (QDSSCs), helping to transfer electrons from external circuit to electrolyte and acting as catalysts. In this work, Co0.85Se/RGO composite films were synthesized via one-step solvothermal process. X-ray diffraction (XRD), scanning electron microscope (SEM) and energy-dispersive spectrometer (EDS) were utilized to characterize the structure, morphology and elemental distribution of the composite CEs. The photovoltaic studies revealed that the composite CEs could yield PCE reaching 2.6% when assembled with CdS/CdSe/TiO2 photoanodes for QDSSCs. EIS and Tafel polarization indicated that the enhanced performances were due to combined high catalytic properties of Co0.85Se with better electron conductivity of RGO.

© 2020 National Institute of Optoelectronics. All rights reserved.

Number of references:27

Main heading:Composite films

Controlled terms:Cadmium sulfide - Electrodes - Electrolytes - II-VI semiconductors - Nanocrystals - Scanning electron microscopy - Selenium compounds - Semiconductor quantum dots - Solar cells - Spectrometers

Uncontrolled terms:Catalytic properties - Electron conductivity - Elemental distribution - Energy dispersive spectrometers - Quantum dot-sensitized solar cells - Solvothermal process - Tafel polarization - Transfer electrons

Classification code:702.3 Solar Cells - 714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 761 Nanotechnology - 804 Chemical Products Generally

Numerical data indexing:Percentage 2.60e+00%

Funding details: Number: 2018JM5060,2018JM6070, Acronym: -, Sponsor: -;Number: 61701369,61974114, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: JB181407, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work was supported by the National Natural Science Foundation of China (grant numbers 61701369 and 61974114); the Natural Science Basic Research Plan in Shaanxi Province of China (grant numbers 2018JM6070 and 2018JM5060); the Fundamental Research Funds for the Central Universities (grant number JB181407).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009602525

Title:Research on image preprocessing techniques needed for long-distance camera scanning Fourier ptychographic imaging

Authors:Wang, Jing (1); Zhao, Hui (2); Yang, Mingyang (1); Li, Zhixin (1); Xiang, Meng (1); Wang, Yuming (1); Fan, Xuewu (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11567

Part number:1 of 1

Issue title:AOPC 2020: Optical Sensing and Imaging Technology

Issue date:2020

Publication year:2020

Article number:115672R

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639553

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Sensing and Imaging Technology, AOPC 2020

Conference date:August 25, 2020 - August 27, 2020

Conference location:Xiamen, China

Conference code:165074

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:With the development of the fourier ptychography in microscopy imaging, more and more researchers consider applying fourier ptychography in long-distance imaging. However being different from microscopic imaging, long distance fourier ptychographic imaging will face more challenges, one of which is the source image quality. In this manuscript, the influence of the source image quality on camera scanning FP imaging will be investigated and simulated. In the first part, the calibration aims to solve the influence of unenenly illumination. After that, a poisson-gaussian mixed noise model based denoising is uesd and could effectively suppresses the noise through parameter estimation. Finally, Phase correalation regisitrtion has to be used to correct the mismatch between adjacent images caused by camera scanning mode. The simulation results demonstrate the effectiveness of the preprocessing methods and could make FP more robust.The signal to noise ratio could reach to 40.5dB while obtained 5*improvement in resolution.

© 2020 SPIE.

Number of references:10

Main heading:Fourier transforms

Controlled terms:Cameras - Image quality - Imaging techniques - Scanning - Signal to noise ratio

Uncontrolled terms:De-noising - Gaussians - Image preprocessing - Microscopic imaging - Microscopy imaging - Mixed noise - Pre-processing method - Scanning mode

Classification code:716.1 Information Theory and Signal Processing - 742.2 Photographic Equipment - 746 Imaging Techniques - 921.3 Mathematical Transformations

Numerical data indexing:Decibel 4.05e+01dB

DOI:10.1117/12.2579989

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580450

Title:Investigation of dwell time based on lucy-richardson algorithm and gercherg surface continuation algorithm

Authors:Qian, XinJie (1, 2); Ma, Zhen (1); Yao, Yongsheng (1, 2); Shen, Le (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11568

Part number:1 of 1

Issue title:AOPC 2020: Optics Ultra Precision Manufacturing and Testing

Issue date:2020

Publication year:2020

Article number:1156814

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639577

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optics Ultra Precision Manufacturing and Testing, AOPC 2020

Conference date:June 29, 2020 - June 30, 2020

Conference location:Shanghai, China

Conference code:165075

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Computer-controlled optical surface forming technology (CCOS) can greatly improve the processing accuracy and processing efficiency of optical mirrors. The most critical problem is the solution of dwell time, which will directly affect the final convergence of the surface shape. it is found through analysis that the solution of the dwell time is a deconvolution process, which is the same as the mathematical model of the Lucy-Richardson algorithm in image restoration technology, so the algorithm can be applied to Solution of dwell time; At the same time, in order to eliminate the high-frequency shape errors caused by discontinuities at the edges of the face shapes, the original shapes need to be extended to achieve smooth connections. The two-dimensional Gercherg bandwidth-limited continuation algorithm can achieve this requirement. The simulation results show that the root mean square value (rms) and peak-valley value (pv) converge from the initial 0.2534λ, 1.494λ (λ=632.8nm) to 0.0158λ and 0.393λ, which proves the effectiveness of the algorithm. Compared with the Lucy-Richardson algorithm, other traditional solving methods have simpler calculation process, higher calculation efficiency, and higher convergence rate.

© 2020 SPIE. All rights reserved.

Number of references:9

Main heading:Edge detection

Controlled terms:Deconvolution - Efficiency - Image reconstruction - Manufacture

Uncontrolled terms:Bandwidth limiteds - Calculation efficiency - Calculation process - Continuation algorithm - Forming technology - High frequency HF - Processing accuracies - Root mean square values

Classification code:913.1 Production Engineering - 913.4 Manufacturing - 921 Mathematics

DOI:10.1117/12.2579836

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204409426823

Title:Dependence of interferogram phase on incident wavenumber and phase stability of Doppler asymmetric spatial heterodyne spectroscopy

Authors:Zhang, Ya-Fei (1, 2); Feng, Yu-Tao (1); Fu, Di (1); Wang, Peng-Chong (1); Sun, Jian (1); Bai, Qing-Lan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Feng, Yu-Tao(fytciom@126.com)

Source title:Chinese Physics B

Abbreviated source title:Chin. Phys.

Volume:29

Issue:10

Issue date:September 2020

Publication year:2020

Article number:104204

Language:English

ISSN:16741056

E-ISSN:20583834

Document type:Journal article (JA)

Publisher:IOP Publishing Ltd

Abstract:Instrument drifts introduce additional phase errors into atmospheric wind measurement of Doppler asymmetric spatial heterodyne spectroscopy (DASH). Aiming at the phase sensitivity of DASH to instrument drifts, in this paper we calculate the optical path difference (OPD) and present an accurate formula of DASH interferogram. By controlling variables in computational ray-tracing simulations and laboratory experiments, it is indicated that initial phase is directly determined by incident wavenumber, OPD offset and field of view (FOV). Accordingly, it is indicated that retrieved phase of DASH is sensitive to slight structural change caused by instrument drift, which provides the proof of necessary-to-track and -correct phase errors from instrument drifts.

© 2020 Chinese Physical Society and IOP Publishing Ltd.

Number of references:15

Main heading:Instrument errors

Controlled terms:Heterodyning - Interferometry - Spectrometers

Uncontrolled terms:Accurate formulas - Atmospheric Winds - Laboratory experiments - Optical path difference - Phase sensitivity - Ray tracing simulation - Retrieved phase - Spatial heterodyne spectroscopies

Classification code:741.3 Optical Devices and Systems - 941.4 Optical Variables Measurements

DOI:10.1088/1674-1056/ab9de8

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20205009602557

Title:Comparison of short focal length dual-fields LWIR optical lens

Authors:Mei, Chao (1); Liang, Chenguang (2); Ma, Yingjun (1); Fei, Jiaqi (1); Guo, Huinan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (2) China Academy of Launch Vehicle Technology, Beijing; 100077, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11567

Part number:1 of 1

Issue title:AOPC 2020: Optical Sensing and Imaging Technology

Issue date:2020

Publication year:2020

Article number:115670V

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639553

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Sensing and Imaging Technology, AOPC 2020

Conference date:August 25, 2020 - August 27, 2020

Conference location:Xiamen, China

Conference code:165074

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:With the development of infrared surveillance technology, the short focus zoom LWIR lens has been paid to more and more attention. In this paper, dual fields zoom lens with the fields of 20*25/8*10 are designed by two different methods. The main specifications of the lens include: aperture is 1 / 2, detector resolution is 640 * 512, pixel size is 15 m, temperature adaptability is -40 to + 60 . And we compare the volume, weight, imaging transmission, transmissivity and economy of the lens by different methods. It is found that the re-imaging method has smaller volume, weight and economy. While another imaging method has better transmittance, so the imaging system can reach higher noise equivalent power at the same image quality

© 2020 SPIE.

Number of references:7

Main heading:Lenses

Controlled terms:Imaging techniques - Infrared radiation

Uncontrolled terms:Detector resolution - Imaging method - Infrared surveillances - Noise equivalent power - Optical lens - Pixel size - Short focal lengths - Transmissivity

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 746 Imaging Techniques

Numerical data indexing:Size 1.50e+01m

DOI:10.1117/12.2575902

Funding details:

Funding text:Supported by Key Research and Development plan of Shaanxi Province ?S -YF?-ZDSF-Z ?

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204209363188

Title:Optical vortex with multi-fractional orders????(Open Access)

Authors:Hu, Juntao (1, 2); Tai, Yuping (3); Zhu, Liuhao (1); Long, Zixu (1); Tang, Miaomiao (1); Li, Hehe (1); Li, Xinzhong (1, 2); Cai, Yangjian (4, 5)

Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Cas, Xi'an; 710119, China; (3) School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang; 471023, China; (4) Shandong Provincial Engineering and Technical Center of Light Manipulations, Shandong Provincial Key Laboratory of Optics and Photonic Device, School of Physics and Electronics, Shandong Normal University, Jinan; 250014, China; (5) School of Physical Science and Technology, Soochow University, Suzhou; 215006, China

Corresponding author:Li, Xinzhong(xzli@haust.edu.cn)

Source title:Applied Physics Letters

Abbreviated source title:Appl Phys Lett

Volume:116

Issue:20

Issue date:May 18, 2020

Publication year:2020

Article number:201107

Language:English

ISSN:00036951

CODEN:APPLAB

Document type:Journal article (JA)

Publisher:American Institute of Physics Inc.

Abstract:Recently, optical vortices (OVs) have attracted substantial attention because they can provide an additional degree of freedom, i.e., orbital angular momentum (OAM). It is well known that the fractional OV (FOV) is interpreted as a weighted superposition of a series of integer OVs containing different OAM states. However, methods for controlling the sampling interval of the OAM state decomposition and determining the selected sampling OAM state are lacking. To address this issue, in this Letter, we propose a FOV by inserting multiple fractional phase jumps into whole phase jumps (2), termed as a multi-fractional OV (MFOV). The MFOV is a generalized FOV possessing three adjustable parameters, including the number of azimuthal phase periods (APPs), N; the number of whole phase jumps in an APP, K; and the fractional phase jump, α. The results show that the intensity and OAM of the MFOV are shaped into different polygons based on the APP number. Through OAM state decomposition and OAM entropy techniques, we find that the MFOV is constructed by sparse sampling of the OAM states, with the sampling interval equal to N. Moreover, the probability of each sampling state is determined by the parameter α, and the state order of the maximal probability is controlled by the parameter K, as K N. This work presents a clear physical interpretation of the FOV, which deepens our understanding of the FOV and facilitates potential applications, especially for multiplexing technology in optical communication based on OAM.

© 2020 Author(s).

Number of references:30

Main heading:Optical communication

Controlled terms:Degrees of freedom (mechanics) - Vortex flow

Uncontrolled terms:Adjustable parameters - Degree of freedom - Fractional order - Multiplexing technologies - Optical vortices - Orbital angular momentum - Physical interpretation - Sampling interval

Classification code:631.1 Fluid Flow, General - 717.1 Optical Communication Systems - 931.1 Mechanics

DOI:10.1063/5.0004692

Funding details: Number: 2018GXRC010, Acronym: -, Sponsor: -;Number: 2019YFA0705000, Acronym: -, Sponsor: -;Number: 11525418,11974102,11974218,91750201, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST201901, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;

Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (Nos. 11974102, 11525418, 91750201, and 11974218), the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, CAS (No. SKLST201901), the Innovation Group of Jinan under Grant No. 2018GXRC010, and the National key Research and Development Project of China (2019YFA0705000).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20203209009012

Title:Multiple Reliable Structured Patches for Object Tracking

Authors:Wu, Siyuan (1); Huang, Ju (1); Feng, Yachuang (1); Sun, Bangyong (1)

Author affiliation:(1) The Key Laboratory of Spectral Imaging Technology CAS, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China

Corresponding author:Feng, Yachuang(fengyachuang@opt.cn)

Source title:Cognitive Computation

Abbreviated source title:Cognitive Comput.

Issue date:2020

Publication year:2020

Language:English

ISSN:18669956

E-ISSN:18669964

Document type:Article in Press

Publisher:Springer

Abstract:It is essential to build the effective appearance model for object tracking in computer vision. Most object trackers can be roughly divided into two categories according to the appearance model: the bounding box model and the patch model. The bounding box model cannot handle shape deformation and occlusion of the non-rigid moving object effectively. The patch model is prone to be disturbed by complex backgrounds. In this paper, we propose a robust multi-structured-patch appearance model to represent the target for object tracking. The proposed appearance model is aimed to exploit and identify reliable patches that can be tracked effectively through the whole tracking process. According to attention mechanism in biological vision system, a coarse-to-fine strategy is usually used to search the target. Therefore, the proposed appearance model is represented by robust patches in different sizes, in which the bigger patches search the rough region of the target and the smaller patches estimate the accurate location. Experimental results on OTB100 dataset show that the proposed method outperforms state-of-the-art trackers.

© 2020, Springer Science+Business Media, LLC, part of Springer Nature.

Number of references:29

Main heading:Object tracking

Controlled terms:Image processing

Uncontrolled terms:Accurate location - Appearance modeling - Attention mechanisms - Biological vision systems - Coarse-to-fine strategy - Complex background - Shape deformation - State of the art

DOI:10.1007/s12559-020-09741-5

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: -;Number: 61806193, Acronym: -, Sponsor: -;Number: 61702498, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61702498, in part by the National Key R&D Program of China under Grant 2017YFB0502900, in part by the CAS Light of West China Program under Grant XAB2017B15, and in part by the National Natural Science Foundation of China under Grant 61806193.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20195107878899

Title:High-precision resin layer polishing of carbon fiber mirror based on optimized ion beam figuring process

Authors:Ding, Jiao Teng (1, 2); Fan, Xue Wu (1); Xu, Liang (1); Ma, Zhen (1); Wang, Yong Jie (1); Wu, Xiao Ge (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; Shannxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Ding, Jiao Teng(dingjiaoteng@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:206

Issue date:March 2020

Publication year:2020

Article number:163575

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:Based on the advantages of stress-free and non-liquid environment, ion beam polishing is the ideal processing technology for the Resin modified layer polishing of the carbon fiber mirror. Since the glass transition temperature of the resin is low, the energy absorbed by the surface of the mirror during ion beam processing can cause localized high temperatures, which can lead to the risk of resin softening. The finite element analysis software was used to simulate the heat transfer process of Ion beam acting on the resin modified layer. The optimum process parameters of the ion beam polishing were determined. At the same time, the resin layer surface polishing test was completed. The experimental results show that the surface polishing of the resin modified layer can be achieved by ion beam processing, and it has the convergence property and the correctness of the theoretical model is Verified.In addition, according to the process instability phenomenon in the ion beam figuring of carbon fiber-based resin modified layer, analytical research on factors affecting the accuracy of ion beam processing were carried out. The effects of various factors on the processing precision of carbon fiber resin layer were analyzed by combing and theoretical analysis,combined with experimental research to determine the amount of influence, and finally put forward corresponding solutions.

© 2019 Elsevier GmbH

Number of references:8

Main heading:Ion beams

Controlled terms:Carbon fiber reinforced plastics - Carbon fibers - Glass - Glass transition - Heat transfer - Ions - Mirrors - Polishing - Resins - Temperature

Uncontrolled terms:Convergence properties - Corresponding solutions - Finite element analysis software - Heat transfer process - Ion Beam Figuring - Process instabilities - Processing technologies - Resin layers

Classification code:604.2 - 641.1 - 641.2 - 741.3 - 802.3 - 804 - 812.3 - 815.1.1 - 817.1 - 932.1

DOI:10.1016/j.ijleo.2019.163575

Funding details: Number: 51402351, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work has been supported by the National Natural Science Foundation of China under Grant No. 51402351 .

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909589267

Title:Non-contact heart rate and respiratory monitoring based on Imaging Photoplethysmography at fingertip

Authors:WenLong, Qiao (1, 2); Liang, Zhou (2); Zhaohui, Liu (2); Jiangjun, Yu (1, 2); Xiaoxiao, Sun (1, 2)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11566

Part number:1 of 1

Issue title:AOPC 2020: Optical Spectroscopy and Imaging; and Biomedical Optics

Issue date:2020

Publication year:2020

Article number:115660Z

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639539

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optical Spectroscopy and Imaging; and Biomedical Optics, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165073

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:In this paper, we use imaging photoplethysmography (IPPG) to realize non-contact measurement of blood volume change of human fingertip, which can avoid distortion of blood vessel wall caused by pressure applied to fingertip. We use CMOS color camera to collect signals and white LED as light source. In the process of signal processing, we abandon the traditional morphological filtering algorithm in the form of double-layer cascade, and use single-layer morphological filtering algorithm. Experiments show that the single-layer morphological filtering algorithm has a good effect of eliminating baseline drift of signals, and can perfectly retain the detail components of signals without shifting the transverse components. We proposed a peak-to-valley value detection algorithm to calculate the heart rate by detecting the time interval between the adjacent peaks value. The experiment compared the accuracy of calculating the heart rate by using the traditional fast Fourier transform and the heart rate based on peak-to-valley value detection. The respiration rate was detected by using the third-order Butterworth filter. The accuracy of heart rate monitoring can be achieved at 97.86% and the accuracy of respiration monitoring can be achieved at 95.02%.

© 2020 SPIE. All rights reserved.

Number of references:18

Main heading:Biomedical signal processing

Controlled terms:Blood - Blood vessels - Butterworth filters - Fast Fourier transforms - Heart - Inertial confinement fusion - Light sources - Patient monitoring - Photoplethysmography - Signal filtering and prediction - Spectroscopy

Uncontrolled terms:Heart-rate monitoring - Imaging photoplethysmography (IPPG) - Morphological filtering - Noncontact measurements - Peak to valley value - Respiration monitoring - Respiratory Monitoring - Transverse components

Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 703.2 Electric Filters - 716.1 Information Theory and Signal Processing - 921.3 Mathematical Transformations - 932.2.1 Fission and Fusion Reactions

Numerical data indexing:Percentage 9.50e+01%, Percentage 9.79e+01%

DOI:10.1117/12.2579405

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203709159457

Title:Design and Test of Thermo Electric Cooling System for Space Based Telescope Detector Assembly

Title of translation:天基望远镜探测器组件热电制冷系统设计与试验

Authors:Yang, Wen-Gang (1, 2); Fan, Xue-Wu (1); Wang, Chen-Jie (1); Qin, De-Jin (1); Li, Bao-Peng (1, 2); Du, Yun-Fei (1); Feng, Liang-Jie (1); Zhao, Hui (1); Gao, Wei (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Fan, Xue-Wu(fanxuewu@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:49

Issue:8

Issue date:August 1, 2020

Publication year:2020

Article number:0822001

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:Active cooling must be utilized to meet the need for the space-based telescope which need very low detector noise level. The precise thermal control measures based on thermo-electric cooling technique are utilized and especially the package system and heat rejection system of thermo-electric coolers and its cotroller system are designed respectively. The parasitic heat load to the detector and the heat path resistances are optimized to reduce the input power and the radiator size. Based on the Peltier effect and Joule effect and Frourie effect, the relations between the enviroments parameters and working parameters are analyzed. The enviroments parameters include the heat pumped requirements, the thermal resistance between the hot side and the sink and the hot side sink temperature, while the working parameters include the current, voltage and input power of coolers. The sensitivity between the heat loads, thermal resistance and the input power are especially researched. The qualification model of the telescope is developed and the thermal vaccum and balance test are accomplished. The test results show that the system design are appropriate and effective, the detector temperature is controlled at -75±0.2℃. Based on the test environments conditions and the cooler's working parameters, the thermal analysis model are discussed and corrected.These lessons can provide some reference for the development of thermo-electric cooling system of the similar space based telescope.

© 2020, Science Press. All right reserved.

Number of references:15

Main heading:Heat resistance

Controlled terms:Cooling - Cooling systems - Hot working - Peltier effect - Telescopes - Thermal load - Thermoanalysis - Thermoelectric equipment

Uncontrolled terms:Cooling technique - Detector Assembly - Heat rejection systems - Qualification model - Space-based telescopes - Test Environment - Thermoelectric cooler - Working parameters

Classification code:535.2 Metal Forming - 615.4 Thermoelectric Energy - 641.2 Heat Transfer - 701.1 Electricity: Basic Concepts and Phenomena - 801 Chemistry

DOI:10.3788/gzxb20204908.0822001

Funding details: Number: 61107008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:item:Natural Science Foundation of China(No.61107008)

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508406566

Title:Development of Laser Beam Expanding Collimator for Cold Atom Preparation

Title of translation:用于冷原子制备的激光扩束准直器的研制

Authors:Hao, An-Qing (1, 2); Jia, Sen (1); Xie, Lai-Yun (1); Cai, Yong (1); Wang, Xian-Hua (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Jia, Sen(jiasen@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:49

Issue:3

Issue date:March 1, 2020

Publication year:2020

Article number:0314002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:Aiming at the defect that most polarization-maintaining fiber input beam expander collimators used in cold atom experiments can not accurately adjust the polarization of the input laser beam, a compact polarization-adjustable laser beam expanding collimator with a full length of 135 mm and an effective diameter of 20 mm for the output circular spot is proposed. The polarization axes of the polarization prism and the wave plate in the beam expander collimator can be independently adjusted, and the polarization state of the input beam of the single-mode polarization maintaining fiber can be accurately adjusted and maintained. The developed laser beam expanding collimator has prepared cold atomic groups that meet the requirements of cold atom interference experiment in the cold atom experiment of three-dimensional magneto-optical trap. The atomic number of cold atomic groups was 5×108, the temperature was about 10 μK, and the flight time signal of atomic fountain with the maximum throw-up height of 1.156 m was obtained.

© 2020, Science Press. All right reserved.

Number of references:20

Main heading:Atom lasers

Controlled terms:Atoms - Laser beams - Light polarization - Optical collimators - Polarization-maintaining fiber

Uncontrolled terms:Atomic fountains - Atomic numbers - Beam expanders - Compact polarization - Effective diameter - Magnetooptical traps - Polarization axes - Polarization state

Classification code:741 Light, Optics and Optical Devices - 744.1 Lasers, General - 744.8 Laser Beam Interactions - 931.3 Atomic and Molecular Physics

Numerical data indexing:Size 1.16e+00m, Size 1.35e-01m, Size 2.00e-02m

DOI:10.3788/gzxb20204903.0314002

Funding details: Number: 2016JM1022, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 11404387,Y429681213, Acronym: -, Sponsor: -;

Funding text:National Natural Science Foundation Youth Fund (No. 11404387), Light of the West Project (No. Y429681213), Shaanxi Natural Science Foundation (No.2016JM1022).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202808915622

Title:Improved genetic algorithm for intrinsic parameters estimation of on-orbit space cameras

Authors:Zhang, Gaopeng (1, 2); Zhao, Hong (1); Zhang, Guangdong (2); Chen, Yaohong (2)

Author affiliation:(1) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi; 710049, China; (2) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, Shaanxi; 710119, China

Corresponding author:Zhao, Hong(zhaohong@mail.xjtu.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:475

Issue date:15 November 2020

Publication year:2020

Article number:126235

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier B.V.

Abstract:Computer vision plays a key role to measure the relative posture and position between the spacecrafts, especially in various important space tasks. As one of the essential steps for computer vision, camera calibration is important for obtaining precise three-dimensional contours of the space target. However, it is impossible to use the traditional calibration targets to calibrate the space camera in orbit. To solve this problem, in this paper, we attack the on-orbit space camera calibration problem by using two steps. First, we only use two images of the solar panel, which is a commonly used element of majority human-made spacecraft, to generate an approximate initial estimation of the camera intrinsic parameters. In order to improve the robustness and accuracy of our method, the second step optimizes the initial solution by using an improved genetic algorithm (IGA). Simulated and real experiments prove that the proposed method is accurate and flexible, and shows good robust performance. Therefore, our method has realistic significance for various space tasks.

© 2020 Elsevier B.V.

Number of references:35

Main heading:Orbits

Controlled terms:Calibration - Cameras - Computer vision - Genetic algorithms - Parameter estimation

Uncontrolled terms:Camera calibration - Camera intrinsic parameters - Initial estimation - Initial solution - Intrinsic parameters - Robust performance - Three dimensional contour - Traditional calibration

Classification code:723.5 Computer Applications - 742.2 Photographic Equipment

DOI:10.1016/j.optcom.2020.126235

Funding details: Number: 201906280414, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2019JQ-295, Acronym: -, Sponsor: -;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XJJ2018190, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;

Funding text:This work is supported by National Natural Science Foundation of China (NSFC) ( 51905529 , 61975161 ), Natural Science Basic Research Program of Shaanxi Province ( 2019JQ-295 ), Fundamental Research Funds for the Central Universities, China ( XJJ2018190 ) and China Scholarship Council Foundation ( 201906280414 ). The authors are grateful to the anonymous reviewers for their valuable comments, which improved the presentation of this work.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202208742411

Title:Simulation Study on Spectral Characteristics of Skin Tissue and Volume Pulse Wave in 400~1 000 nm Wavelength

Title of translation:皮肤组织容积脉搏波400~1000 nm光谱特性仿真研究

Authors:Zhou, Liang (1); Yu, Jiang-Jun (1, 2); Liu, Zhao-Hui (1); Li, Zhi-Guo (1); Shan, Qiu-Sha (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:40

Issue:4

Issue date:April 1, 2020

Publication year:2020

Pages:1071-1075

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press

Abstract:According to the anatomical structure of the skin tissue, we established a six-layer model, and the characteristic parameters of each layer of skin tissue were given. We considered the absorption characteristics of oxidized hemoglobin and reduced hemoglobin, and gave the spectral absorption coefficients of each layer of skin tissue according to the contents of water, blood, fat and oxygen saturation in each layer of skin tissue, as well as the size of blood vessels. The scattering coefficients at different wavelengths were simplified properly, and then the scattering coefficient spectra of each layer of skin tissue were obtained. In this paper, we used Monte Carlo method to simulate the transmission process of 400~1 000 nm wavelength light in the multi-layer model of skin tissue under the conditions of contraction and relaxation. The spectral reflectance of the skin tissue was obtained by counting the distribution characteristics of a large number of photons. The amplitude spectrum of volume pulse wave was obtained by calculating the reflection coefficient of the two states obtained from the simulation. The simulation results showed that the volume pulse wave amplitude of green light is better than that of red light and blue light when the incident light intensity is constant. The penetration depth spectrum of skin tissue was obtained by calculating the corresponding skin tissue depth when the light flux of different wavelengths decreased to 1/e along the direction of skin tissue depth. The results showed that the penetration depth of blue light and green light is small, the blue light can only reach the surface layer, the green light can reach the micro-circulation layer, and the penetration depth of red light is the largest, which can reach the dermis directly. Considering when the light travels through the skin, it involves a dynamic process from contraction to relaxation, so we define the depth of pulse signal generation based on penetration depth, and the spectral generation depth is calculated by using the penetration depth of vasodilation and contraction in two different states. The results showed that the depth of light generation at different wavelengths is greater than the penetration depth, the depth of blue light is shallowand the blood absorption modulation is small, so the pulse signal obtained is more easily interfered by noise. The volume pulse wave of red light is deeper than that of green light, but compared with green light, its absorption and modulation by blood is smaller, and the depth of green light generation is enough to reach the dermis vascular layer, so the amplitude of red light volume pulse wave is smaller than that of green light. Our simulation results confirm some spectral characteristics of skin tissue, which provides a theoretical basis for the accurate acquisition of multispectral volume pulse waves and other related studies.

© 2020, Peking University Press. All right reserved.

Number of references:15

Main heading:Tissue

Controlled terms:Blood - Blood vessels - Hemoglobin - Hemoglobin oxygen saturation - Light - Microcirculation - Modulation - Monte Carlo methods - Plasma diagnostics - Reflection - Water absorption

Uncontrolled terms:Absorption characteristics - Absorption modulation - Anatomical structures - Distribution characteristics - Incident light intensity - Scattering co-efficient - Spectral characteristics - Spectral reflectances

Classification code:461.1 Biomedical Engineering - 461.2 Biological Materials and Tissue Engineering - 741.1 Light/Optics - 802.3 Chemical Operations - 922.2 Mathematical Statistics - 932.3 Plasma Physics

Numerical data indexing:Size 4.00e-07m to 1.00e-06m

DOI:10.3964/j.issn.1000-0593(2020)04-1071-05

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580493

Title:Design and improvement of a type of filter wheel in remote sensing

Authors:Song, Yang (1); Shen, Zeyi (1); Xin, Wei (1); Zhang, Xianghui (1); Lin, Shangmin (1, 2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11570

Part number:1 of 1

Issue title:AOPC 2020: Telescopes, Space Optics, and Instrumentation

Issue date:2020

Publication year:2020

Article number:1157002

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639614

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Telescopes, Space Optics, and Instrumentation, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165102

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:The field of laser remote sensing and laser detection is becoming a research hot spot. Filter wheel is an important part in the process of remote sensing. The purpose of filter wheel is to choose the proper band wavelength of light to realize the specific functions. The paper made a design scheme of a type of filter wheel component and then did structural analysis under different and strict load cases. These various load cases were used to prove that if the component could be safe during the launching time of the rocket. For the initial design scheme, the situation was not good. After that, the paper made an improved design by using special flexible supports, which had flexible links and support glue. At last, structural analysis was made. The result of analysis showed that the improvement was effective and successful.

© 2020 SPIE. All rights reserved.

Number of references:9

Main heading:Remote sensing

Controlled terms:Rockets - Space optics - Structural analysis - Telescopes - Wheels

Uncontrolled terms:Design scheme - Flexible links - Flexible supports - Improved designs - Initial design - Laser detection - Laser remote sensing - Wavelength of light

Classification code:408.1 Structural Design, General - 601.2 Machine Components - 654.1 Rockets and Missiles - 656.1 Space Flight

DOI:10.1117/12.2572943

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20194507626522

Title:Tracing and implementation of IMM Kalman filtering feed-forward compensation technology based on neural network

Authors:Lin, Di (1, 2); Wu, Yi-ming (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Lin, Di(lindi2019@tom.com)

Source title:Optik

Abbreviated source title:Optik

Volume:202

Issue date:February 2020

Publication year:2020

Article number:163574

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Elsevier GmbH

Abstract:UAV has great varieties, large controllable velocity and angular velocity, which makes high requirements on automatically identifying capability and tracking accuracy of ground search and tracking system. It happens frequently that servo feed-forward compensation technology is added in the search and tracking system to improve the tracking accuracy. However, accurate estimations of target velocity and acceleration becomes the difficult point of controlling feed-forward compensation technology. This paper proposes to adopt IMM Kalman filter technology based on neural network to estimate velocity and acceleration of the moving targets, which served as input variable of the servo feed-forward compensation system to eliminate the error of the missing distance caused by velocity and acceleration. Neural network can identify target types and makes self-adaptive adjustment on IMM Kalman filter parameters, which is helpful to improve estimation accuracy. Experimental results show that IMM Kalman filter feed-forward compensation technology based on neural network in the search and tracking system can improve the tracking accuracy of the system by more than 3 times than the conventional Kalman filter compensation, and the model verification is effective.

© 2019 Elsevier GmbH

Number of references:18

Main heading:Neural networks

Controlled terms:Aircraft detection - Error compensation - Kalman filters - Unmanned aerial vehicles (UAV) - Velocity

Uncontrolled terms:Accurate estimation - Adaptive adjustment - Feed-forward compensation - Filter compensations - Kalman-filtering - Model verification - Tracking accuracy - Tracking system

Classification code:652.1 Aircraft, General - 716.2 Radar Systems and Equipment

DOI:10.1016/j.ijleo.2019.163574

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203008974485

Title:Point-ahead analysis and pre-pointing link stability study of intersatellite laser communication????(Open Access)

Authors:Zhang, Fu-Rui (1, 2); Han, Jun-Feng (1); Ruan, Ping (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Zhang, Fu-Rui(jiffring@126.com)

Source title:Optica Applicata

Abbreviated source title:Opt Appl

Volume:50

Issue:1

Issue date:2020

Publication year:2020

Pages:111-126

Language:English

ISSN:00785466

E-ISSN:18997015

CODEN:OPAPBZ

Document type:Journal article (JA)

Publisher:Wroc&lstrok;aw University of Science and Technology

Abstract:The static bias error angle obviously affects pre-pointing links' stability in the presence of vibration in intersatellite laser communication. The 2nd order point-ahead angle is a source of misalignment which was ignored in most solutions, and this is the concern of our paper. In this study, we present a further analytical investigation into the point-ahead angle in complex satellite maneuvering environment. Static bias error angle induced by the 2nd order point-ahead angle has been studied under different intersatellite links. The probability density function of the pre-pointing links' outage has been derived in the presence of pointing jitter taking consideration of the static bias angle, and the link budget has also been analyzed. Simulation model of link stability has been established to verify the numerical results by the Monte Carlo method in Matlab-Simulink environment. The results have shown that the 2nd order point-ahead angle has a significant detrimental impact on link stability in long distance links. It is a neglectable factor. This work is dedicated to intersatellite laser communication system design.

© 2020 WrocÅ‚aw University of Science and Technology. All rights reserved.

Number of references:23

Main heading:Stability

Controlled terms:Budget control - Integrated optics - MATLAB - Monte Carlo methods - Numerical methods - Probability density function

Uncontrolled terms:Analytical investigations - Inter-satellite laser communications - Inter-satellite link - Link stability - MATLAB/ SIMULINK - Numerical results - Point-ahead angle - Simulation model

Classification code:921 Mathematics - 921.6 Numerical Methods - 922.1 Probability Theory - 922.2 Mathematical Statistics

DOI:10.37190/OA200109

Funding details: Number: Y655811213, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:Acknowledgments – We would like to express my gratitude to all those who helped us during the writing of this work. This work is supported by the foundation project of Chinese Academy of Sciences (Y655811213).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20201808589188

Title:Realized large field of view infrared imaging system of single lens with external field splicing

Title of translation:外视场拼接的单镜头大视场中波红外成像系统的实现

Authors:Shan, Qiusha (1, 2); Su, Xiuqin (1); Duan, Jing (1, 2); Zhou, Liang (1); Liu, Kai (1); Yan, Peipei (1); Jiang, Kai (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:49

Issue:3

Issue date:March 25, 2020

Publication year:2020

Article number:0314002

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics

Abstract:Based on the principle of external field splicing, a principle prototype of large-field mid-wave infrared was developed. A cooled mid-wave infrared optical system was designed. The secondary imaging structure of the optical exit aperture coincides with the cold screen was adopted to make sure 100% cold shielding efficiency of the system. The working wave band was 3.7-4.8 μm, the focus was 40 mm, the relative aperture was 1:2, the full field of view was 21.74°×17.46°(27.88°), the total length of the system was 145 mm. The principle of external field splicing with time-sharing exposure imaging of holes/mirrors was adopted, 2×1 field of view expansion was realized. The design result show that MTF>0.68 of the off-axis field of view at spatial frequency of 21 lp/mm, which closes to the diffraction limited. The system has compact constructure and has high imaging quality. The feasibility and rationality of the splicing principle were verified using prototype.

© 2020, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.

Number of references:11

Main heading:Thermography (imaging)

Controlled terms:Infrared radiation - Optical systems

Uncontrolled terms:Diffraction limited - External fields - Imaging quality - Imaging structure - Large field of views - Mid wave infrared (MWIR) - Shielding efficiency - Spatial frequency

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography

Numerical data indexing:Percentage 1.00e+02%, Size 1.45e-01m, Size 3.70e-06m to 4.80e-06m, Size 4.00e-02m

DOI:10.3788/IRLA202049.0314002

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580485

Title:Optimized design for the supporting structure of a large aperture mirror

Authors:Rui, Wang Jia (1); Tao, Yang Hong (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Ucas, Xi'an, Shanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11570

Part number:1 of 1

Issue title:AOPC 2020: Telescopes, Space Optics, and Instrumentation

Issue date:2020

Publication year:2020

Article number:115700S

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639614

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Telescopes, Space Optics, and Instrumentation, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165102

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:With the continuous development of optical technology in recent years, the pace of human exploration of space has further accelerated. Space remote sensing technology is widely used in surveying and mapping, environmental monitoring and other fields. Therefore, the requirements for space optics technology are gradually increasing. In order to reduce the launch cost and the deformation of the supporting member and the main mirror base under its own gravity, a lightweight design must be carried out. Therefore, under the premise of ensuring the rigid body displacement of the mirror body and the error of the mirror shape, lightweight has become a key requirement for the development of remote sensing technology. By comparing various supporting structures, the spatial freedom of the mirror is calculated. Choose a combination of 9-point post-support and 3-point peripheral support. Compare and select the materials commonly used in the structure of the supporting part and the main mirror base. Although the support structure adopts topology optimization, a very effective support method can be obtained, but the final result cannot be universally applied to the support structure of mirrors with different apertures. Therefore, this paper determines the design structure of the relationship between the mirror support position, the fundamental frequency and the surface shape accuracy and the support structure parameters based on the flexibility matrix. For the rigid parts of the supporting structure and the main mirror base, simulation software was used to optimize the design of the initial design structure to remove excess materials. The final main mirror base lightweight rate was 36.6%, and the triangular plate lightweight rate was 65.9%. The static analysis and modal analysis of the supporting scheme are carried out by analysis software. After optimization, the shape accuracy of the primary mirror under its own weight is better than λ/50. Structural resonance will seriously affect the use and life of the equipment. Therefore, the modal analysis is performed, and the fundamental frequency is within a reasonable range during the optimization process. The simulation results show that the first-order fundamental frequency is 836.55 Hz. The analysis results show that while ensuring the shape accuracy of the primary mirror, the lightweight design of the mirror support assembly is realized.

© 2020 SPIE. All rights reserved.

Number of references:6

Main heading:Structural optimization

Controlled terms:Computer software - Environmental technology - Ground supports - Mirrors - Modal analysis - Natural frequencies - Remote sensing - Space optics - Static analysis - Telescopes

Uncontrolled terms:Continuous development - Environmental Monitoring - Fundamental frequencies - Large-aperture mirrors - Remote sensing technology - Rigid body displacement - Space remote sensing technology - Structural resonance

Classification code:454 Environmental Engineering - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics - 921.5 Optimization Techniques

Numerical data indexing:Frequency 8.37e+02Hz, Percentage 3.66e+01%, Percentage 6.59e+01%

DOI:10.1117/12.2580254

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203609147464

Title:Real-time long-term tracker with tracking–verification–detection–refinement

Authors:Liao, Jiawen (1, 2, 3); Qi, Chun (2); Cao, Jianzhong (1); Ren, Long (1, 2, 3); Zhang, Gaopeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Liao, Jiawen(liaojiawen@stu.xjtu.edu.cnemailqichun@mail.xjtu.edu.cn)Qi, Chun(qichun@mail.xjtu.edu.cn)

Source title:Journal of Visual Communication and Image Representation

Abbreviated source title:J Visual Commun Image Represent

Volume:72

Issue date:October 2020

Publication year:2020

Article number:102896

Language:English

ISSN:10473203

E-ISSN:10959076

CODEN:JVCRE7

Document type:Journal article (JA)

Publisher:Academic Press Inc.

Abstract:Long-term tracking is one of the most challenging problems in computer vision. In this paper, we make full use of the Discriminative Correlation Filter (DCF), and propose a real-time long-term tracker by exploiting a joint tracking–verification–detection–refinement framework. We utilize a DCF which is updated aggressively to estimate translation and scale variation of the target. Subsequently, a passively updated DCF checks the reliability of the tracking result. Once the result is not reliable, we evoke the proposed optimized candidate detector to generate a small number of relatively high quality candidates. Finally, one DCF with an adaptive online learning rate is adopted to refine the predictions that the sparse candidates inferred. In addition, we employ a selection mechanism for the correlation responses to maintain reliable samples effectively. Extensive experiments show that the proposed method performs favorably against lots of state-of-the-art methods while running more than 30 frames per second on single CPU.

© 2020 Elsevier Inc.

Number of references:49

Main heading:Visual communication

Controlled terms:Image processing

Uncontrolled terms:Adaptive online learning - Correlation filters - Frames per seconds - High quality - Joint tracking - Long-term tracking - Selection mechanism - State-of-the-art methods

Classification code:717.1 Optical Communication Systems

DOI:10.1016/j.jvcir.2020.102896

Funding details: Number: 61675161,51905529,61572395, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019JQ-295, Acronym: -, Sponsor: -;

Funding text:This work was supported in part by the National Natural Science Foundation of China [ 61572395 , 61675161 , 51905529 ]; and in part by Shaanxi province natural science basic research program [ 2019JQ-295 ].

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202708899068

Title:Optical Path Design for Catadioptric Star Sensor with Large Aperture

Title of translation:大口径折反式星敏感器光学系统的光路设计

Authors:Li, Jian-Lin (1, 2); Lei, Guang-Zhi (1); Bai, Yang (2); Wen, Yan (1); Lin, Shang-Min (1)

Author affiliation:(1) Space Optical Technology Research Department, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) Institute of Photonics and Photo-Technology, Northwest University, Xi'an; 710069, China

Corresponding author:Lei, Guang-Zhi(13022861093@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:49

Issue:6

Issue date:June 1, 2020

Publication year:2020

Article number:0611002

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to improve the ability of the star sensor to detect limited magnitude, a combination of the improved Cassegrain system, aperture-corrected spherical lens group and field-of-view corrected spherical lens group is adopted to design an optical system of a large aperture catadioptric star sensor capable of correcting astigmatism, field curvature and distortion, with the spectral range of 450~950 nm, the semifield of 1.4°, an entrance pupil diameter of 250 mm and the focal length of 425 mm. According to the calculation of the initial structure parameters of the system based on the aberration theory and the optimization design of Ray tracing in Zemax software, the blocking ratio of the secondary mirror of the optical system reaches 0.43, the energy concentration of the imaging point is 80% within 30 μm, and the maximum distortion is 0.081%. The modulation transfer function is greater than 0.75 at a Nyquist frequency of 34 lp/mm, and the maximum magnification chromatic aberration is 1.138 μm, which meets the imaging requirements of star sensor pairs. Through the tolerance analysis of optical system, in the 20 Monte Carlo analysis results, the best structure is the 13th structure with the performance function of 4.975 16 μm, the worst structure is the 20th structure with the performance function of 7.799 57 μm. Through the performance function analysis of 20 times Monte Carlo structure, the selected tolerance value can well meet the basic requirements of optical system performance, and provide the basis for the errors in the process of processing and installation.

© 2020, Science Press. All right reserved.

Number of references:24

Main heading:Aberrations

Controlled terms:Fits and tolerances - Lenses - Monte Carlo methods - Optical systems - Stars

Uncontrolled terms:Chromatic aberration - Energy concentration - Initial structures - Monte carlo analysis - Optical path design - Optimization design - Performance functions - Tolerance analysis

Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 741.3 Optical Devices and Systems - 922.2 Mathematical Statistics

Numerical data indexing:Percentage 8.00e+01%, Percentage 8.10e-02%, Size 1.14e-06m, Size 2.50e-01m, Size 3.00e-05m, Size 4.25e-01m, Size 4.50e-07m to 9.50e-07m

DOI:10.3788/gzxb20204906.0611002

Funding details: Number: 19JC040, Acronym: -, Sponsor: -;Number: 11803075, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:Shaanxi Provincial Department of Education Serving Local Special Project (No. 19JC040), National Natural Science Foundation of China (No. 11803075).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202108693593

Title:Implementation of IMM Kalman filtering feed-forward compensation technology in search and track systems

Title of translation:IMM Kalman滤波前馈补偿技术在搜索跟踪系统中的应用

Authors:Lin, Di (1, 2); Wu, Yi-Ming (1); Zhu, Fan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Lin, Di(lindi@opt.ac.cn)

Source title:Kongzhi yu Juece/Control and Decision

Abbreviated source title:Kongzhi yu Juece Control Decis

Volume:35

Issue:5

Issue date:May 1, 2020

Publication year:2020

Pages:1253-1258

Language:Chinese

ISSN:10010920

CODEN:KYJUEF

Document type:Journal article (JA)

Publisher:Northeast University

Abstract:The UAV has large maneuver and angular velocity motions, which puts high requirments on the servo tracking accuracy of the ground search and tracking system. In order to improve the tracking accuracy of the ground search and tracking system, servo feed-forward compensation technology is often added. Accurate target velocity and acceleration estimation becomes the difficulty of feed-forward compensation control. IMM Kalman filtering is used to estimate the velocity and acceleration information of the target, and it is used as the input of servo feed-forward compensation system to eliminate the miss distance error caused by the velocity and acceleration of the target. The actual system test results show that the tracking accuracy of the search and tracking system is more than three times higher than that of the conventional Kalman filter compensation by using the IMM Kalman filter feed-forward compensation technology, and the model verification is effective.

© 2020, Editorial Office of Control and Decision. All right reserved.

Number of references:18

Main heading:Kalman filters

Controlled terms:Aircraft detection - Error compensation - Information filtering - Motion tracking - Velocity

Uncontrolled terms:Acceleration estimation - Feed-forward compensation - Filter compensations - Kalman-filtering - Miss distance errors - Model verification - Target velocity - Tracking accuracy

Classification code:716.2 Radar Systems and Equipment - 903.1 Information Sources and Analysis

DOI:10.13195/j.kzyjc.2018.1103

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20203809187327

Title:Broadband Photonic RF Channelizer with 92 Channels Based on a Soliton Crystal Microcomb????(Open Access)

Authors:Xu, Xingyuan (1, 2); Tan, Mengxi (1); Wu, Jiayang (1); Boes, Andreas (3); Nguyen, Thach G. (3); Chu, Sai T. (4); Little, Brent E. (5); Morandotti, Roberto (6, 7); Mitchell, Arnan (3); Moss, David J. (1)

Author affiliation:(1) Optical Sciences Centre, Swinburne University of Technology, Hawthorn; VIC; 3122, Australia; (2) Electro-Photonics Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton; VIC; 3800, Australia; (3) Rmit University, Melbourne; VIC; 3001, Australia; (4) Department of Physics, City University of Hong Kong, Tat Chee Avenue, 999077, Hong Kong; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (6) INRS-Énergie, Matériaux et Télécommunications, Varennes; J3X 1S2, Canada; (7) Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu; 610054, China

Corresponding author:Moss, David J.(dmoss@swin.edu.au)

Source title:Journal of Lightwave Technology

Abbreviated source title:J Lightwave Technol

Volume:38

Issue:18

Issue date:September 15, 2020

Publication year:2020

Pages:5116-5121

Article number:9099964

Language:English

ISSN:07338724

E-ISSN:15582213

CODEN:JLTEDG

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:We report a broadband radio frequency (RF) channelizer with up to 92 channels using a coherent microcomb source. A soliton crystal microcomb, generated by a 49 GHz micro-ring resonator (MRR), is used as a multi-wavelength source. Due to its ultra-low comb spacing, up to 92 wavelengths are available in the C band, yielding a broad operation bandwidth. Another high-Q MRR is employed as a passive optical periodic filter to slice the RF spectrum with a high resolution of 121.4 MHz. We experimentally achieve an instantaneous RF operation bandwidth of 8.08 GHz and verify RF channelization up to 17.55 GHz via thermal tuning. Our approach is a significant step towards the monolithically integrated photonic RF receivers with reduced complexity, size, and unprecedented performance, which is important for wide RF applications ranging from broadband analog signal processing to digital-compatible signal detection.

© 1983-2012 IEEE.

Number of references:59

Main heading:Signal receivers

Controlled terms:Bandwidth - Crystals - Optical resonators - Signal processing - Solitons

Uncontrolled terms:Analog signal processing - Microring Resonator (MRR) - Monolithically integrated - Multi-wavelength source - Operation bandwidth - Periodic filters - Photonic RF channelizer - Reduced complexity

Classification code:716.1 Information Theory and Signal Processing - 741.3 Optical Devices and Systems - 933.1 Crystalline Solids

Numerical data indexing:Frequency 1.21e+08Hz, Frequency 1.76e+10Hz, Frequency 4.90e+10Hz, Frequency 8.08e+09Hz

DOI:10.1109/JLT.2020.2997699

Funding details: Number: -, Acronym: MESI, Sponsor: Ministère de l'Économie, de la Science et de l'Innovation - Québec;Number: -, Acronym: NSERC, Sponsor: Natural Sciences and Engineering Research Council of Canada;Number: DP150104327, Acronym: ARC, Sponsor: Australian Research Council;Number: -, Acronym: -, Sponsor: Canada Research Chairs;Number: XDB24030000, Acronym: CAS, Sponsor: Chinese Academy of Sciences;

Funding text:Manuscript received March 14, 2020; revised May 2, 2020; accepted May 22, 2020. Date of publication May 26, 2020; date of current version September 15, 2020. This work was supported in part by the Australian Research Council Discovery Projects Program (No. DP150104327), RM acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC) through the Strategic and Discovery Grants Schemes, in part by the MESI PSR-SIIRI Initiative in Quebec, and in part by the Canada Research Chair Program. Brent E. Little was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, Grant No. XDB24030000. (Corresponding author: David J. Moss.) Xingyuan Xu is with the Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC 3122, Australia and also with the Electro-Photonics Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton VIC 3800, Australia (e-mail: xingyuanxu@swin.edu.au).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Green

Accession number:20204409430987

Title:Experimental study on a high-sensitivity optical fiber sensor in wide-range refractive index detection

Authors:Meng, Xiaojian (1); Li, Jianshe (1, 2, 3); Guo, Ying (1); Liu, Yundong (1); Li, Shuguang (1); Guo, Haitao (2); Bi, Weihong (3); Lu, Huibin (3); Cheng, Tonglei (4)

Author affiliation:(1) State Key Laboratory of Metastable Materials Science and Technology, Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao; 066004, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi’an; 710119, China; (3) Key Laboratory for Special Fiber and Fiber Sensor of Hebei Province, School of Information Science and Engineering, Yanshan University, Qinhuangdao; 066004, China; (4) State Key Laboratory of Synthetical Automation for Process Industries, College of Information Science and Engineering, Northeastern University, Shenyang; 110819, China

Corresponding author:Li, Jianshe(jianshelee@ysu.edu.cn)

Source title:Journal of the Optical Society of America B: Optical Physics

Abbreviated source title:J Opt Soc Am B

Volume:37

Issue:10

Issue date:October 1, 2020

Publication year:2020

Pages:3063-3067

Language:English

ISSN:07403224

E-ISSN:15208540

CODEN:JOBPDE

Document type:Journal article (JA)

Publisher:OSA - The Optical Society

Abstract:A novel plasmonic sensor based on a photonic crystal fiber has been fabricated. Experimental results show that 2 cm is an optimal fiber length of the sensor for refractive index monitoring. It is found that the average wavelength sensitivity and the resolution of the proposed sensor are 4000 nm/RIU and 2.5 × 10−5 RIU in the wind range of 1.3333–1.4035, respectively. In addition, this paper presents a set of operation flat roofs that is used in the side-polished fiber technique. Moreover, two effective methods of coating silver film are discussed in detail. The research in this paper has enlightening significance for exploring new optical fiber sensing technology and will open a new design methodology for optical fiber sensors.

© 2020 Optical Society of America

Number of references:22

Main heading:Refractive index

Controlled terms:Fiber optic sensors - Fibers - Optical fiber fabrication - Photonic crystal fibers - Roofs

Uncontrolled terms:Design Methodology - Fiber length - High sensitivity - Optical fiber sensing technology - Plasmonic sensors - Side-polished fiber - Silver film - Wavelength sensitivity

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics

Numerical data indexing:Size 2.00e-02m

DOI:10.1364/JOSAB.399424

Funding details: Number: 2019YFB2204001, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: B2018003008,F2017203110,F2017203193, Acronym: -, Sponsor: Natural Science Foundation of Hebei Province;Number: SKLST201908, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;

Funding text:Funding. National Key Research and Development Program of China (2019YFB2204001); The Program of the Natural Science Foundation of Hebei Province (F2017203110, F2017203193); The Postdoctoral Preferred Funding Research Project of Hebei Province (B2018003008); The Open Research Fund of State Key Laboratory of Transient Optics and Photonics (SKLST201908).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109714275

Title:High-speed focusing and scanning light through multimode fiber

Authors:Geng, Yi (1, 2); Zhang, Zaikun (1, 2); He, Zhengquan (1); Chen, Hui (1, 2); Wang, Ruiduo (1, 2); Kong, Depeng (1); Guo, Haitao (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Guo, Haitao(guoht_001@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11717

Part number:1 of 1

Issue title:24th National Laser Conference and Fifteenth National Conference on Laser Technology and Optoelectronics

Issue date:2020

Publication year:2020

Article number:1171715

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510642690

Document type:Conference article (CA)

Conference name:24th National Laser Conference and 15th National Conference on Laser Technology and Optoelectronics

Conference date:October 17, 2020 - October 20, 2020

Conference location:Shanghai, China

Conference code:165963

Publisher:SPIE

Abstract:The image distortions caused by the inherent mode dispersion and coupling of the multimode fiber (MMF) lead its output light field to be scattered and prevent it from applicating in endoscopy. Although various wavefront shaping methods have been proposed to overcome these image distortions and form the focused spots through the MMF, they a re usually time-consuming due to the multiple iterations and tedious calculation. In this paper, we present a binary amplitude-only modulation parallel coordinate algorithm for focusing and scanning light through a multimode fiber (MMF) based on the digital micro-mirror device (DMD) in a reference-free multimode fiber imaging system. In principle, our algorithm is capable of efficiently calculating the masks to be added to DMD for yielding a series of tightly focused spots; and for the same number of modulation sub-regions, our method is more than M (the number of focused spots) times faster than the amplitude iterative optimization algorithm. In the experiment, efficient light focusing and scanning at the distal end of the MMF without the iteration process are demonstrated. Furthermore, we demonstrate that the proposed method can also be extended to focus and scan light at multiple planes along the axial direction by just modifying the input wavefront accordingly. We predict the high-speed focusing method through the MMF might have the potential application for fast spot-scanning imaging.

© 2020 SPIE.

Number of references:17

Main heading:Iterative methods

Controlled terms:Fibers - Focusing - Light sources - Modulation - Multimode fibers - Optoelectronic devices - Scanning - Wavefronts

Uncontrolled terms:Digital micro-mirror device - Focusing and scanning - Iterative optimization algorithms - Multi-mode fibers (MMF) - Multiple iterations - Parallel coordinates - Tedious calculation - Wave front shaping

Classification code:741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 921.6 Numerical Methods

DOI:10.1117/12.2586318

Funding details: Number: 61535015, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was supported by the National Natural Science Foundation of China (Grant No. 61535015).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202608879110

Title:High-precision speed control of the turntable of a circumferential scanning imaging system

Title of translation:周视扫描成像系统的转台转速高精度控制

Authors:Wu, Shao-Bo (1, 2); Su, Xiu-Qin (1); Wang, Kai-Di (1, 2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:28

Issue:6

Issue date:June 1, 2020

Publication year:2020

Pages:1353-1364

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences

Abstract:In this study, a composite control algorithm was developed for controlling the turntable speed of a circumferential scanning imaging system (ICSIS) driven by a permanent magnet synchronous motor (PMSM) to obtain stable high-resolution images. Based on the load characteristics of the turntable and the mathematical model of the PMSM, a single-sampling rate control system model, comprising the mechanical parameter uncertainty and fast-changing torque disturbance, was established. The fast nonsingular terminal sliding mode (FNTSM) control and an extended high-gain observer were used in designing the speed-tracking controller. The maximum torque current ratio control was determined through another FNTSM control. Finally, the performance of the speed tracking control based on the above composite algorithm was analyzed and verified. The experimental results show that when the turntable speed is set to 120 or 240 r/min, the speed tracking error is less than 0. 1%. Compared with the proportional-integral control, FNTSM control, and linear sliding mode control+observer, the governing system with the proposed algorithm was characterized by no overshooting, stronger anti-disturbance, and higher speed-tracking precision, which enabled the ICSIS to capture clear and stable circumferential images.

© 2020, Science Press. All right reserved.

Number of references:22

Main heading:Speed

Controlled terms:Image resolution - Imaging systems - Permanent magnets - Sliding mode control - Speed regulators - Two term control systems

Uncontrolled terms:High resolution image - Load characteristics - Mechanical parameters - Non-singular terminal sliding modes - Permanent Magnet Synchronous Motor - Proportional-integral control - Scanning imaging systems - Speed tracking control

Classification code:704.1 Electric Components - 731.1 Control Systems - 732.1 Control Equipment - 746 Imaging Techniques

Numerical data indexing:Percentage 1.00e+00%, Rotational_Speed 2.40e+02RPM

DOI:10.3788/OPE.20202806.1353

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20202008644271

Title:3.9 μm emission and energy transfer in ultra-low OH−, Ho3+ /Nd3+ co-doped fluoroindate glasses

Authors:Wang, Ruicong (1); Zhang, Jiquan (1); Zhao, Haiyan (1); Wang, Xin (1); Jia, Shijie (1); Guo, Haitao (2); Dai, Shixun (3); Zhang, Peiqing (3); Brambilla, Gilberto (4); Wang, Shunbin (1); Wang, Pengfei (1, 5)

Author affiliation:(1) Key Lab of In-fiber Integrated Optics, Ministry Education of China, Harbin Engineering University, Harbin; 150001, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an; Shaanxi; 710119, China; (3) Laboratory of Infrared Material and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo; 315211, China; (4) Optoelectronics Research Centre, University of Southampton, Southampton; SO17 1BJ, United Kingdom; (5) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen; 518060, China

Corresponding author:Wang, Pengfei(pengfei.wang@tudublin.ie)

Source title:Journal of Luminescence

Abbreviated source title:J Lumin

Volume:225

Issue date:September 2020

Publication year:2020

Article number:117363

Language:English

ISSN:00222313

CODEN:JLUMA8

Document type:Journal article (JA)

Publisher:Elsevier B.V., Netherlands

Abstract:Ho3+/Nd3+ co-doped fluoroindate glass samples were prepared by melt-quenching. The absorption and emission spectra, and the differential scanning calorimetry (DSC) curve were measured and used to evaluate the spectroscopic parameters and thermal properties. An intense ~3.9 μm emission, ascribed to the transition Ho3+:5I5 →5I6, was observed under the excitation of an 808 nm laser diode and was ascribed to the efficient energy transfer process from Nd3+: 4F3/2 to Ho3+: 5I5, showing the Nd3+ role as a sensitizer. The optimal concentration ratio of Ho3+ and Nd3+ for ~3.9 μm emission was estimated to be 1:1. The spectroscopic performance suggests that the Ho3+/Nd3+ co-doped fluoroindate glass is a potential gain material for ~3.9 μm laser applications.

© 2020

Number of references:35

Main heading:Glass

Controlled terms:Absorption spectroscopy - Differential scanning calorimetry - Emission spectroscopy - Energy transfer - Laser excitation

Uncontrolled terms:Absorption and emission spectra - Co-doped - Efficient energy transfer - Fluoroindate glass - Gain materials - Melt-quenching - Optimal concentration - Spectroscopic parameters

Classification code:744.9 Laser Applications - 812.3 Glass - 944.6 Temperature Measurements

Numerical data indexing:Size 3.90e-06m, Size 8.08e-07m

DOI:10.1016/j.jlumin.2020.117363

Funding details: Number: NSFC 61935006, Acronym: -, Sponsor: -;Number: -, Acronym: HEU, Sponsor: Harbin Engineering University;Number: 3072019CF2506, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: B13015, Acronym: -, Sponsor: Higher Education Discipline Innovation Project;Number: 61905048, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;

Funding text:This work was financial supported by program of National Key Natural Science Foundation of China (NSFC 61935006 ), National Natural Science Foundation of China (NSFC 61905048 , 618050748 ), the Fundamental Research Funds for the Central Universities ( HEUCFG201841 , GK2250260018 , 3072019CF2504 , 3072019CF2506 , 3072020CFJ2507 ), the 111 project ( B13015 ) to the Harbin Engineering University.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201208317960

Title:Research on adaptive pulse signal extraction algorithm based on fingertip video image

Title of translation:基于指尖视频图像的自适应脉搏信号提取算法研究

Authors:Yu, Jiangjun (1, 2); Zhou, Liang (1); Liu, Zhaohui (1); Li, Zhiguo (1); Shan, Qiusha (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Zhou, Liang(zhouliang@opt.ac.cn)

Source title:Shengwu Yixue Gongchengxue Zazhi/Journal of Biomedical Engineering

Abbreviated source title:Shengwu Yixue Gongchengxue Zazhi/J. Biomed. Eng.

Volume:37

Issue:1

Issue date:February 25, 2020

Publication year:2020

Pages:150-157

Language:Chinese

ISSN:10015515

Document type:Journal article (JA)

Publisher:West China Hospital, Sichuan Institute of Biomedical Engineering

Abstract:In order to solve the saturation distortion phenomenon of R component in fingertip video image, this paper proposes an iterative threshold segmentation algorithm, which adaptively generates the region to be detected for the R component, and extracts the human pulse signal by calculating the gray mean value of the region to be detected. The original pulse signal has baseline drift and high frequency noise. Combining with the characteristics of pulse signal, a zero phase digital filter is designed to filter out noise interference. Fingertip video images are collected on different smartphones, and the region to be detected is extracted by the algorithm proposed in this paper. Considering that the fingertip's pressure will be different during each measurement, this paper makes a comparative analysis of pulse signals extracted under different pressures. In order to verify the accuracy of the algorithm proposed in this paper in heart rate detection, a comparative experiment of heart rate detection was conducted. The results show that the algorithm proposed in this paper can accurately extract human heart rate information and has certain portability, which provides certain theoretical help for further development of physiological monitoring application on smartphone platform.

Copyright © 2020 by Editorial Office of Journal of Biomedical Engineering.

Number of references:15

Main heading:Signal detection

Controlled terms:Biomedical signal processing - Digital filters - Extraction - Heart - Image segmentation - Iterative methods - Patient monitoring - Signal analysis - Smartphones

Uncontrolled terms:Comparative analysis - Comparative experiments - Heart-rate detection - High-frequency noise - Physiological monitoring - Pulse signal - Video image processing - Zero-phase digital filter

Classification code:461.2 Biological Materials and Tissue Engineering - 461.6 Medicine and Pharmacology - 703.2 Electric Filters - 716.1 Information Theory and Signal Processing - 718.1 Telephone Systems and Equipment - 802.3 Chemical Operations - 921.6 Numerical Methods

DOI:10.7507/1001-5515.201901038

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580483

Title:Design of flexure support for high-precision base plates on hard X-ray imager

Authors:Feiyang, Zhang (1, 2); Fu, Li (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11570

Part number:1 of 1

Issue title:AOPC 2020: Telescopes, Space Optics, and Instrumentation

Issue date:2020

Publication year:2020

Article number:115700Q

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639614

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Telescopes, Space Optics, and Instrumentation, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165102

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:An attempt has been made to propose a flexure-based support of the high-precision base plates on Hard X-ray Imager (HXI), which is designed to investigate the non-thermal high-energy electrons accelerated in solar flares. This flexure support is designed to compensate thermal strain, which can lead to an unacceptable reduction of surface accuracy under rigid constraint. The flexure support proposed in this article is made up of eight separated single-side filleted flexure leaves, which are small and easy to manufacture. The flexure leaf's compliance matrix is derived from Castigliano's second theorem. Then the matrix is used, along with Finite Element Analysis (FEA), to determine the critical dimension of the flexure leaves. According to the result of finite element simulation, under a temperature change of ±5K, the inplane torsion angle of the installation sites of grids are reduced to within 10 arcsec using flexure support. And the firstorder natural frequency of the base plate with flexure support is 184 Hz, which is higher than the natural frequency and external disturbance frequency of general satellite carriers.

© 2020 SPIE. All rights reserved.

Number of references:8

Main heading:X rays

Controlled terms:Finite element method - Natural frequencies - Plates (structural components) - Telescopes

Uncontrolled terms:Compliance matrixes - Critical dimension - External disturbances - Finite element simulations - Hard X-ray Imager - High-energy electron - Installation site - Temperature changes

Classification code:408.2 Structural Members and Shapes - 921.6 Numerical Methods - 932.1 High Energy Physics

Numerical data indexing:Frequency 1.84e+02Hz

DOI:10.1117/12.2580082

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204509457905

Title:Design of hybrid refractive-diffractive infrared dual-band zoom optical system

Title of translation:折衍混合红外双波段变焦光学系统设计

Authors:Yang, Hongtao (1); Yang, Xiaofan (1, 2); Mei, Chao (1); Chen, Weining (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciencs, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Yang, Xiaofan(zflx_369@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:49

Issue:10

Issue date:October 25, 2020

Publication year:2020

Article number:20200036

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics

Abstract:In this paper, the influence models of different diffraction elements on diffraction efficiency were established, and the diffraction efficiency among single diffraction element, harmonic diffraction element and double diffraction element was compared. The advantages of using double diffraction elements in infrared optical system were analyzed. The average diffraction efficiency of different material combinations was calculated. Based on this, a hybrid infrared dual-band and dual-field optical system suitable for airborne platform was designed. The resolution of the large field of view was 1.5 m@16 km. The long and the short focal length were 960 mm and 480 mm respectively. The zoom function was realized by switching the mirror to ensure the optical axis stability. The simulation results show that the MTF curves are smooth and close to the diffraction limit under the large temperature difference of −40 - +60 ℃. The RMS radius is within the radius of airy spots, and the minimum characteristic size of the binary diffraction surface is 6.9 μm. The design results meet the engineering requirements.

Copyright ©2020 Infrared and Laser Engineering. All rights reserved.

Number of references:12

Main heading:Optical systems

Controlled terms:Diffraction efficiency - Efficiency

Uncontrolled terms:Characteristic size - Diffraction elements - Infrared optical systems - Large field of views - Material combination - Short focal lengths - Temperature differences - Zoom optical system

Classification code:741.3 Optical Devices and Systems - 913.1 Production Engineering

Numerical data indexing:Size 4.80e-01m, Size 6.90e-06m, Size 9.60e-01m

DOI:10.3788/IRLA20200036

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909581269

Title:Quantum efficiency of transmission-mode graded bandgap AlxGa1-xAs/GaAs photocathode????(Open Access)

Authors:Yang, Yang (1); Cao, Weiwei (1); Xu, Peng (1); Bai, Yonglin (1); Zhu, Bingli (1); Wang, Bo (1); Qin, Junjun (1); Bai, Xiaohong (1)

Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology of CAS, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Yang, Yang(yangyang@opt.cn)

Source title:Journal of Physics: Conference Series

Abbreviated source title:J. Phys. Conf. Ser.

Volume:1676

Part number:1 of 1

Issue:1

Issue title:2020 6th International Conference on Materials, Mechanical Engineering and Automation Technology

Issue date:November 18, 2020

Publication year:2020

Article number:012220

Language:English

ISSN:17426588

E-ISSN:17426596

Document type:Conference article (CA)

Conference name:2020 6th International Conference on Materials, Mechanical Engineering and Automation Technology, MMEAT 2020

Conference date:May 1, 2020 - May 3, 2020

Conference location:Zhuhai, Virtual, China

Conference code:165152

Publisher:IOP Publishing Ltd

Abstract:Graded bandgap AlxGa1-xAs/GaAs photocathode with enhanced quantum efficiency is analyzed in this study. We present the relevant quantum efficiency equations by solving onedimensional continuity equations for transmission-mode graded bandgap AlxGa1-xAs/GaAs and standard AlGaAs/GaAs photocathodes. The results show that the built-in electrical field from bandgap gradation efficiently collects photogenerated electrons in the buffer layer such that quantum efficiencies in the short regions are improved in transmission-mode AlxGa1-xAs/GaAs photocathode. The results also show that a thinner buffer layer improves the short-wavelength response of transmission-mode photocathode. Increasing the active layer thickness improves long-wavelength responses but reduces short-wavelength responses. The method presented in this work may provide better estimate of performance and guide the optimum design of graded bandgap AlxGa1-xAs/GaAs photocathode.

© Published under licence by IOP Publishing Ltd.

Number of references:10

Main heading:Quantum efficiency

Controlled terms:Aluminum gallium arsenide - Buffer layers - Efficiency - Energy gap - Field emission cathodes - Gallium compounds - III-V semiconductors - Photocathodes - Transmissions

Uncontrolled terms:Continuity equations - Electrical field - Graded bandgap - Long wavelength - Optimum designs - Photogenerated electrons - Short wavelengths - Transmission mode

Classification code:602.2 Mechanical Transmissions - 712.1.2 Compound Semiconducting Materials - 714.1 Electron Tubes - 913.1 Production Engineering - 931.4 Quantum Theory; Quantum Mechanics - 933.1 Crystalline Solids

DOI:10.1088/1742-6596/1676/1/012220

Funding details: Number: 6140721010203, Acronym: -, Sponsor: -;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;

Funding text:This research was supported by the Equipment Pre-research Field Fund (6140721010203) and by West Light Foundation of Chinese Academy of Sciences.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Bronze

Accession number:20204709520722

Title:Research on compact design and reduced structure analysis of a small camera for ocean remote sensing

Authors:Song, Yang (1); Hu, Bin (1, 2); Chai, Wenyi (1); Zou, Gangyi (1, 2); Hu, Yongming (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Hu, Yongming(huyongming@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11571

Part number:1 of 1

Issue title:Optics Frontier Online 2020: Optics Imaging and Display

Issue date:2020

Publication year:2020

Article number:1157102

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639638

Document type:Conference article (CA)

Conference name:Optics Frontier Online 2020: Optics Imaging and Display

Conference date:June 19, 2020 - June 20, 2020

Conference location:Virtual, Online

Conference code:164417

Publisher:SPIE

Abstract:The status of ocean remote sensing is becoming more and more important. There are all kinds of resources in ocean and many ships on the sea. It is necessary for people to detect or observe these objects to know more about the natural resources and to ensure safety of ships. The paper concentrated on a compact design of a small space camera. An oscillating mirror was designed in the camera for a small volume. After that, structure analysis was done by traditional method and reduced method. The key step of reduced method was to get the reduced model. The analysis result showed that the reduced method could not only cut down the cost of computing, but also give a result with good accuracy. Besides, the analysis result indicated that the small space camera could undergo the strict load cases smoothly. The design in this paper may give some guidance to other designers and engineers when they are going to make a small space camera for ocean remote sensing.

© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

Number of references:8

Main heading:Structural design

Controlled terms:Cameras - Object detection - Oceanography - Remote sensing - Ships - Space optics

Uncontrolled terms:Compact designs - Ocean remote sensing - Oscillating mirrors - Reduced methods - Reduced model - Space cameras - Structure analysis

Classification code:408.1 Structural Design, General - 471.1 Oceanography, General - 656.1 Space Flight - 723.2 Data Processing and Image Processing - 742.2 Photographic Equipment

DOI:10.1117/12.2576285

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20210109716225

Title:Optical design of portable Raman spectrometer based on-site rapid detection

Authors:Luo, Weibo (1, 2); Yang, Jianfeng (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, Shanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Yang, Jianfeng(yangjf@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11606

Part number:1 of 1

Issue title:ICOSM 2020: Optoelectronic Science and Materials

Issue date:2020

Publication year:2020

Article number:116060G

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510640429

Document type:Conference article (CA)

Conference name:2020 International Conference on Optoelectronic Science and Materials, ICOSM 2020

Conference date:September 25, 2020 - September 27, 2020

Conference location:Hefei, China

Conference code:165961

Sponsor:AEIC Academic Exchange Information Centre; National University of Defense Technology; University of Science and Technology of China

Publisher:SPIE

Abstract:Raman spectroscopy is used to detect material structure, which is currently one of the fastest growing frontiers in the field of spectroscopy. The detection speed of Raman spectroscopy is very fast and does not require sample preparation, so non-destructive detection can be achieved. The realization of portable Raman spectrometer enables Raman spectroscopy to be used for on-site detection. The portable Raman spectrometer is easy to operate. Moreover, the price is relatively cheap, and the application demand in various industries has become greater. We design a portable Raman spectrometer optical system based on on-site rapid detection. It provides a important foundation for the development and production of portable Raman spectrometers.

© 2020 SPIE.

Number of references:6

Main heading:Spectrometers

Controlled terms:Optical design - Optical systems - Raman spectroscopy

Uncontrolled terms:Detection speed - Material structure - Nondestructive detection - On-site detection - Raman spectrometers - Rapid detection - Sample preparation

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

DOI:10.1117/12.2585551

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909580440

Title:Large diameter optics support optimization based on finite element method and optical surface fitting with zernike method

Authors:Liang-Xiao, Zhao (1, 2); Jian, Zhang (1, 3); San-Feng, Hao (1, 2); Li-Min, Gao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China; (3) Xidian University, Xi'an; 710126, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11568

Part number:1 of 1

Issue title:AOPC 2020: Optics Ultra Precision Manufacturing and Testing

Issue date:2020

Publication year:2020

Article number:1156804

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639577

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Optics Ultra Precision Manufacturing and Testing, AOPC 2020

Conference date:June 29, 2020 - June 30, 2020

Conference location:Shanghai, China

Conference code:165075

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:Large aperture optical element deformed by its own weight is caused is one of the important considerations when we design the optical system, designing a mirror support solution that reduces the effects of gravity is critical.Traditional methods cannot effectively and intuitively analyze mirror distortion.In this paper, the finite element method and the optical surface fitting with zernike polynomial are used to optimize the support scheme. These two methods are mutually verified and this method which use two parts is verified by the optimization scheme of the Φ900mm standard spherical mirror.With optimization, the steel belt loading and unloading weight hammer support scheme is finally adopted, and the best solution with Φ705mmin the circumference and each aperture is 55mm on the back of the mirror is obtained. The theoretical mirror surface's PV and RMS value equal to7.36nm (1/86λ) and 1.64nm (1/386λ), which is a good basis for guiding production.

© 2020 SPIE. All rights reserved.

Number of references:13

Main heading:Finite element method

Controlled terms:Fiber optic sensors - Manufacture - Mirrors - Optical systems - Polynomials - Surface fitting - Unloading

Uncontrolled terms:Large aperture - Large diameter - Mirror supports - Mirror surfaces - Optical surfaces - Optimization scheme - Support optimizations - Zernike polynomials

Classification code:537.1 - 691.2 - 741.1.2 - 741.3 - 921.1 - 921.6

Numerical data indexing:Size 5.50e-02m

DOI:10.1117/12.2574631

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:5853317

Title:Sound Active Attention Framework for Remote Sensing Image Captioning

Authors:Lu, Xiaoqiang (1); Wang, Binqiang (1, 2); Zheng, Xiangtao (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China

Corresponding author:Lu, Xiaoqiang(luxq666666@gmail.com)

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:58

Issue:3

Issue date:March 2020

Publication year:2020

Pages:1985-2000

Article number:8931249

Language:English

ISSN:01962892

E-ISSN:15580644

CODEN:IGRSD2

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Attention mechanism-based image captioning methods have achieved good results in the remote sensing field, but are driven by tagged sentences, which is called passive attention. However, different observers may give different levels of attention to the same image. The attention of observers during testing, then, may not be consistent with the attention during training. As a direct and natural human-machine interaction, speech is much faster than typing sentences. Sound can represent the attention of different observers. This is called active attention. Active attention can be more targeted to describe the image; for example, in disaster assessments, the situation can be obtained quickly and the corresponding disaster areas can be located related to the specific disaster. A novel sound active attention framework is proposed for more specific caption generation according to the interest of the observer. First, sound is modeled by mel-frequency cepstral coefficients (MFCCs) and the image is encoded by convolutional neural networks (CNNs). Then, to handle the continuity characteristic of sound, a sound module and an attention module are designed based on the gated recurrent units (GRUs). Finally, the sound-guided image feature processed by the attention module is imported into the output module to generate descriptive sentence. Experiments based on both fake and real sound data sets show that the proposed method can generate sentences that can capture the focus of human.

© 1980-2012 IEEE.

Number of references:59

Controlled terms:artificial neural network - image analysis - remote sensing

Species terms:Grus

Classification code:71.8.5.4 Remote sensing: numerical and image analysis

DOI:10.1109/TGRS.2019.2951636

Funding details: Number: 2017YFB0502900, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: 61702498, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61772510, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: 61806193, Acronym: -, Sponsor: National Natural Science Foundation of China;Number: SKLST2017010, Acronym: -, Sponsor: Chinese Academy of Sciences;

Funding text:This work was supported in part by the National Key Research and Development Program of China under Grant 2017YFB0502900; in part by the National Natural Science Foundation of China under Grant 61806193, Grant 61702498, and Grant 61772510; in part by the Young Top-Notch Talent Program of the Chinese Academy of Sciences under Grant QYZDB-SSW-JSC015; in part by the Open Research Fund of the State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, under Grant SKLST2017010; in part by the CAS "Light of West China" Program under Grant XAB2017B26 and Grant XAB2017B15; and in part by the Xi'an Postdoctoral Innovation Base Scientific Research Project.

Database:GEOBASE

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20201508406616

Title:Design of Co-aperture Wide Spectrum Compound Eye Optical System

Title of translation:共口径宽光谱复眼光学系统设计

Authors:Chen, Yang (1); Gao, Ming (1); Hu, Xue-Lei (1); Zhang, Xi-Bin (2); Jiao, Yang (3)

Author affiliation:(1) Institute of Optoelectronic Engineering, Xi'an Technological University, Xi'an; 710021, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (3) Northwest Institute of Mechanical & Electrical Engineering, Xianyang; Shaanxi; 712099, China

Corresponding author:Gao, Ming(minggao1964@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:49

Issue:3

Issue date:March 1, 2020

Publication year:2020

Article number:0322002

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

Publisher:Chinese Optical Society

Abstract:In order to expand the receiving spectrum of the compound eye optical system, a visible light and long wave infrared wide spectrum compound eye optical system was studied. The dual-band ommatidia common image equation was derived, and the matching requirement between ommatidia and the receiving system was established. The ommatidia optical system has working bandwidths of 0.38~0.78 μm and 8~12 μm, a focal length of 5 mm, a relative aperture of 1:3, and a field of view of 10°. The imaging position of the ommatidia system in both the bands is 2.92 mm. The angle between two neighboring center optical axes of the neighboring ommatidia is 4.016°, with 650 ommatidia, and the combined field of view is 90°.The receiving optical system has a focal length of 4 mm, a field of view of 80° and a relative aperture of 1:3. The ommatidia system and receiving system show good image quality, without any thermal effects in the temperature range of -40℃ to 60℃.

© 2020, Science Press. All right reserved.

Number of references:15

Main heading:Optical systems

Controlled terms:Cobalt compounds - Infrared radiation

Uncontrolled terms:Field of views - Focal lengths - Imaging positions - Long wave infrared - Receiving system - Temperature range - Visible light - Wide spectrum

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems

Numerical data indexing:Size 8.00e-06m to 1.20e-05m, Size 2.92e-03m, Size 3.80e-07m to 7.80e-07m, Size 4.00e-03m, Size 5.00e-03m

DOI:10.3788/gzxb20204903.0322002

Funding details: Number: 17JS052, Acronym: -, Sponsor: -;

Funding text:Army Equipment Preresearch Project (No. 301XXX102), Key Laboratory of Shaanxi Provincial Department of Education (No. 17JS052).

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20204909588159

Title:Design of a zoom projection optical system for high resolution projector

Authors:Qin, Guang (1, 2); Fan, Xuewu (2); Ma, Zixuan (1, 2); Zhang, Gengyao (1, 2)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Science, Xi'an, Shanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11565

Part number:1 of 1

Issue title:AOPC 2020: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics

Issue date:2020

Publication year:2020

Article number:1156508

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639515

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Display Technology; Photonic MEMS, THz MEMS, and Metamaterials; and AI in Optics and Photonics, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165072

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:With the rapidly development of optoelectronic technology and computer technology, the projection display technology has also been unprecedentedly developed. In this paper, a zoom projection objective lens is designed based on Digital Light Processing (DLP) projection display technology, the 0.47in DMD chip of Texas Instruments is selected in this paper, its resolution is 1920×1080 and its micromirror pitch is 5.4 μm. The optical system uses a 100% offset transmissive projection structure. The working wavelength of the whole zoom projection lens is visible light, and 14 lenses including protective glass are used for the projection lens, each lens in the designed system is spherical, the total length of the system is 220mm, the aperture of the optical system is about 58mm, focal length of the zoom projection lens ranges from 25mm to 32 mm, viewing angle ranges from 41 degree to 51degree, and F number is 1.7, the distortion of the designed system is less than 3%, the projected image plane relative illumination of the zoom projection lens above 90%, the telecentricity of the system is less than 1 degree. The MTF value is close to 0.3 at the Nyquist frequency 93 lp/mm for the full field of view, the designed system meet the requirements of projection. In order to meet the current processing level, the radius of curvature tolerance, the spacing tolerance, the eccentricity tolerance and the tilt tolerance are analyzed. The results show that the zoom projection lens is easy to process and produce.

© 2020 SPIE. All rights reserved.

Number of references:9

Main heading:Optical systems

Controlled terms:Display devices - Lenses - Light - Metamaterials - Optical projectors - Photonics

Uncontrolled terms:Computer technology - Current processing - Digital light processing - Optoelectronic technology - Projection displays - Projection optical system - Radius of curvature - Relative illumination

Classification code:722.2 Computer Peripheral Equipment - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 951 Materials Science

Numerical data indexing:Percentage 1.00e+02%, Percentage 3.00e+00%, Percentage 9.00e+01%, Size 2.20e-01m, Size 2.50e-02m to 3.20e-02m, Size 5.40e-06m, Size 5.80e-02m

DOI:10.1117/12.2579880

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Accession number:20195007829418

Title:Development of an In-Situ Laser Machining System Using a Three-Dimensional Galvanometer Scanner????(Open Access)

Authors:Li, Xiao (1, 2); Liu, Bin (1, 2); Mei, Xuesong (1, 2); Wang, Wenjun (1, 2); Wang, Xiaodong (1, 2); Li, Xun (3)

Author affiliation:(1) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, Xi'an; 710049, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China

Corresponding author:Liu, Bin(liubin1110@xjtu.edu.cn)

Source title:Engineering

Abbreviated source title:Engineering

Volume:6

Issue:1

Issue date:February 2020

Publication year:2020

Pages:68-76

Language:English

ISSN:20958099

Document type:Journal article (JA)

Publisher:Elsevier Ltd

Abstract:In this study, a three-dimensional (3D) in-situ laser machining system integrating laser measurement and machining was built using a 3D galvanometer scanner equipped with a side-axis industrial camera. A line structured light measurement model based on a galvanometer scanner was proposed to obtain the 3D information of the workpiece. A height calibration method was proposed to further ensure measurement accuracy, so as to achieve accurate laser focusing. In-situ machining software was developed to realize time-saving and labor-saving 3D laser processing. The feasibility and practicability of this in-situ laser machining system were verified using specific cases. In comparison with the conventional line structured light measurement method, the proposed methods do not require light plane calibration, and do not need additional motion axes for 3D reconstruction; thus they provide technical and cost advantages. The in-situ laser machining system realizes a simple operation process by integrating measurement and machining, which greatly reduces labor and time costs.

© 2020 THE AUTHORS

Number of references:41

Main heading:In situ processing

Controlled terms:Calibration - Light measurement - Scanning

Uncontrolled terms:Galvanometer scanner - Integrating measurement - Laser machining - Line structured light measurements - Line structured lights - Measurement accuracy - Three-dimensional measurements - Threedimensional (3-d)

Classification code:941.4 Optical Variables Measurements

DOI:10.1016/j.eng.2019.07.024

Funding details: Number: 2016YFB1102502,2017YFB1104602, Acronym: -, Sponsor: National Basic Research Program of China (973 Program);Number: IRT_15R54, Acronym: -, Sponsor: Program for Jilin University Science and Technology Innovative Research Team;

Funding text:This work was supported by the National Key Research and Development Program of China ( 2017YFB1104602 and 2016YFB1102502 ) and the Program for Changjiang Scholars and Innovative Research Team in University ( IRT_15R54 ).This work was supported by the National Key Research and Development Program of China (2017YFB1104602 and 2016YFB1102502) and the Program for Changjiang Scholars and Innovative Research Team in University (IRT_15R54). Xiao Li, Bin Liu, Xuesong Mei, Wenjun Wang, Xiaodong Wang, and Xun Li declare that they have no conflict of interest or financial conflicts to disclose.

Database:Compendex

Compilation and indexing terms, Copyright 2021 Elsevier Inc.

Open Access type(s): All Open Access, Gold

Accession number:20204909580486

Title:Topology optimization design of large aperture mirror for the vt system of svom

Authors:Lin, Feng (1, 2); Wang, Wei (1); Zhang, Jian (1); Fan, Xuewu (1); Xu, Wenjing (1, 2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Xi'an, Shaanxi; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:11570

Part number:1 of 1

Issue title:AOPC 2020: Telescopes, Space Optics, and Instrumentation

Issue date:2020

Publication year:2020

Article number:115700T

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9781510639614

Document type:Conference article (CA)

Conference name:2020 Applied Optics and Photonics China: Telescopes, Space Optics, and Instrumentation, AOPC 2020

Conference date:November 30, 2020 - December 2, 2020

Conference location:Beijing, China

Conference code:165102

Sponsor:Chinese Society for Optical Engineering (CSOE)

Publisher:SPIE

Abstract:This article, which is based on the topology optimization theory, considered the lightweight design of large aperture reflectors. Firstly, the material selection is based on the low temperature environment and the low temperature infrared optical mechanical structure design principles. Then, by using the minimum deformation of the mirror surface as the objective function, mirror volume and rigid body displacement as design restraints, and imposing manufacturing constraints, a conceptual design of the mirror back with manufacturability was accomplished. Finally, by using the finite element analysis method to compare the performance of the topologically optimized mirror and the primal mirror, it shows that the topologically optimized mirror met the design requirements in terms of lightening effect and structural rigidity, and the surface figure met the requirements under the influence of gravity, which emphasizes the feasibility and practicality of topology optimization in the large aperture mirror' design.

© 2020 SPIE. All rights reserved.

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