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Dual-beam delay-encoded all fiber Doppler optical coherence tomography for in vivo measurement of retinal blood flow

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Chinese Optics Letters 2022年第1期20卷 101-105页

作者： Mingming Wan Shanshan Liang Xinyu Li Zhengyu Duan Jiebin Zou Jun Chen Jin Yuan Jun Zhang School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China National Innovation Center for Advanced Medical Devices Shenzhen 518131China GBA Branch of Aerospace Information Research Institute Chinese Academy of SciencesGuangzhou 510530China School of Biomedical Engineering Sun Yat-sen UniversityGuangzhou 510006China State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510060China School of Artificial Intelligence Guilin University of Electronic TechnologyGuilin 541004China

In this paper,we propose and demonstrate a dual-beam delay-encoded Doppler spectral domain optical coherence tomography(OCT) system for in vivo measurement of absolute retinal blood velocity and flow with arbitrary *** incident beam is split by a beam displacer into two probe beams of the single-spectrometer spectral domain OCT system with orthogonal polarization states and an optical path length *** validate our approach with a phantom and in vivo experiments of human retinal blood flow,respectively.

关键词： optical coherence tomography ocular perfusion optic nerve head ophthalmology

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Graphene MEMS and NEMS

arXiv

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arXiv 2024年

作者： Fan, Xuge He, Chang Ding, Jie Gao, Qiang Ma, Hongliang Lemme, Max C. Zhang, Wendong Advanced Research Institute of Multidisciplinary Sciences Beijing Institute of Technology Beijing100081 China Center for Interdisciplinary Science of Optical Quantum and NEMS Integration Beijing Institute of Technology Beijing100081 China School of Integrated Circuits and Electronics Beijing Institute of Technology Beijing100081 China Faculty of Electrical Engineering and Information Technology RWTH Aachen University Otto-Blumenthal-Str. 25 Aachen52074 Germany AMO GmbH Otto-Blumenthal-Str. 25 Aachen52074 Germany State Key Laboratory of Dynamic Measurement Technology North University of China Taiyuan030051 China National Key Laboratory for Electronic Measurement Technology School of Instrument and Electronics North University of China Taiyuan030051 China

Graphene is being increasingly used as an interesting transducer membrane in micro- and nanoelectromechanical systems (MEMS and NEMS, respectively) due to its atomical thickness, extremely high carrier mobility, high mechanical strength and piezoresistive electromechanical transductions. NEMS devices based on graphene feature increased sensitivity, reduced size, and new functionalities. In this review, we discuss the merits of graphene as a functional material for MEMS and NEMS, the related properties of graphene, the transduction mechanisms of graphene MEMS and NEMS, typical transfer methods for integrating graphene with MEMS substrates, methods for fabricating suspended graphene, and graphene patterning and electrical contact. Consequently, we provide an overview of devices based on suspended and nonsuspended graphene structures. Finally, we discuss the potential and challenges of applications of graphene in MEMS and NEMS. Owing to its unique features, graphene is a promising material for emerging MEMS, NEMS and sensor applications. © 2024, CC BY-NC-SA.

关键词： Graphene devices

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Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation

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national Science Review 2022年第6期9卷 143-152页

作者： Haisheng Li Kui Xu Pohua Chen Youyou Yuan Yi Qiu Ligang Wang Liu Zhu Xiaoge Wang Guohong Cai Liming Zheng Chun Dai Deng Zhou Nian Zhang Jixin Zhu Jinglin Xie Fuhui Liao Hailin Peng Yong Peng Jing Ju Zifeng Lin Junliang Sun College of Chemistry and Molecular Engineering Beijing National Laboratory for Molecular Sciences Peking University Key Laboratory of Flexible Electronics and Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech University Core Labs King Abdullah University of Science and Technology Electron Microscopy Centre of Lanzhou University Lanzhou University School of Chemical and Environmental Engineering China University of Mining and Technology State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences Analytical Instrumentation Center Peking University School of Physical Science and Technology Electron Microscopy Centre of Lanzhou University and Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University College of Materials Science and Engineering Sichuan University

The effects of nanoconfined water and the charge storage mechanism are crucial to achieving the ultrahigh electrochemical performance of two-dimensional transition metal carbides（MXenes）. We propose a facile method to manipulate nanoconfined water through surface chemistry modification. By introducing oxygen and nitrogen surface groups, more active sites were created for Ti3C2MXene, and the interlayer spacing was significantly increased by accommodating three-layer nanoconfined water. Exceptionally high capacitance of 550 F g-1(2000 F cm-3) was obtained with outstanding high-rate performance. The atomic scale elucidation of the layer-dependent properties of nanoconfined water and pseudocapacitive charge storage was deeply probed through a combination of ‘computational and experimental microscopy'. We believe that an understanding of, and a manipulation strategy for, nanoconfined water will shed light on ways to improve the electrochemical performance of MXene and other two-dimensional materials.

关键词： two-dimensional material, MXene nanoconfined water energy storage mechanism supercapacitors

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Air Stable Chalcogen-Doped Rubicenes with Diradical Character

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CCS Chemistry 2022年第12期4卷 3669-3676页

作者： Liangzhuo Ma Song Wang Yuan Li Qinqin Shi Wenbin Xie Hao Chen Xin Wang Weiya Zhu Lang Jiang Runfeng Chen Qian Peng Hui Huang College of Materials Science and Opto-Electronic Technology Center of Materials Science and Optoelectronics EngineeringCAS Center for Excellence in Topological Quantum ComputationCAS Key Laboratory of Vacuum PhysicUniversity of Chinese Academy of SciencesBeijing 100049 Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640 Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing University of Posts&TelecommunicationsNanjing 210023 Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsCAS Center of Excellence in Molecular ScienceInstitute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049

Air stable diradicaloid polycyclic aromatic hydrocarbon(PAH)materials possess unique electronic and magnetic properties for various *** general,long conjugated distances between two radical centers are required to improve the air stability,thereby complicating the synthetic ***,the chalcogen containing rubicenes(O-,S-,and Se-rubicenes)were systematically investigated to understand the chalcogen effects on chalcogen-rubicene physicochemical ***,these rubicenes presented unprecedented diradical characterwithin one simple benzene ring and excellent air *** by single-crystal X-ray studies,variable-temperature nuclear magnetic resonance,and electron spin ***,the nucleus independent chemical shifts andthe anisotropy of the induced currentdensity calculations revealed that the formation of diradical was caused by a pro-aromaticity driving ***,the diradical character of rubicenes are visualizedbyFractionalOccupationNumberWeighted Electron Density(FOD)plots,which present high NFOD values from 1.651 to *** contribution provided distinctive insights into the structure and property relationship of PAH diradicals.

关键词： rubicene diradical character air stable pro-aromaticity chalcogen

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A Matching Based Escape Routing Algorithm with Variable Design Rules and Constraints 23

A Matching Based Escape Routing Algorithm with Variable Desi...

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Proceedings of the 60th Annual ACM/IEEE Design Automation Conference

作者： Qinghai Liu Disi Lin Chuandong Chen Huan He Jianli Chen Yao-Wen Chang Center for Discrete Mathematics Fuzhou University Fuzhou China and Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian China Department of Microelectronics Fuzhou University Fuzhou China Hangzhou Huawei Enterprises Telecommunication Technologies Co. Ltd Hangzhou China State Key Lab of ASIC & System Fudan University Shanghai China Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan and Department of Electrical Engineering National Taiwan University Taipei Taiwan

ISBN: (纸本)9798350323481

Escape routing is a critical problem in PCB routing, and its quality greatly affects the PCB design cost. Unlike the traditional escape routing that works mainly for the BGA package with unique line width and space, this paper presents a high-performance escape routing algorithm to handle problems with variable design rules and manual constraints, including variable line widths/spaces, the neck mode of wires, and the pad entry for differential pairs. We first propose a novel obstacle-avoiding method to project pins to the boundary and construct a channel projection graph. We then construct a bi-projection graph and propose a matching-based hierarchical sequencing algorithm to consider manual constraints. We perform global routing for each pin/differential pair by congestion-avoiding path initialization and rip-up and reroute path optimization. Finally, we complete detailed routing in every face, ensuring the wire angle and pad entry constraints. Experimental results show that our algorithm can achieve 100% routability without any design rule violation for all given industrial PCB instances, while two state-of-the-art routers cannot complete routing.

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Micro-Doppler Encoding for Long-Range Drone Monitoring

Micro-Doppler Encoding for Long-Range Drone Monitoring

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International Congress on advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS)

作者： D. Vovchuk M. Khobzei V. Tkach O. Eliiashiv O. Tzidki K. Grotov V. Bobrovs A. Glam P. Ginzburg School of Electrical Engineering 30 Chaim Levanon Street Tel Aviv University Tel Aviv Israel Department of Radio Engineering and Information Security 2 Kotsyubynskyi Street Yuriy Fedkovych Chernivtsi National University Chernivtsi Ukraine Institute of Photonics Electronics and Telecommunications 6a Ķīpsalas Street Riga Technical University Riga Latvia Department of Information and Telecommunication Technology and Systems 15 Karpatska Street Ivano-Frankivsk National Technical University of Oil and Gas Ivano-Frankivsk Ukraine Rafael Advanced Defense Systems Ltd Haifa Israel

ISBN: (数字)9798350373493

ISBN: (纸本)9798350373509

The massive deployment of small drones in urban airspaces calls for an immediate development of safety monitoring systems. Active solutions, such as live location reporting, are currently in use but heavily depend on continuous data connectivity, highlighting the need for reliable passive alternatives. Here we demonstrate a novel solution to tag the drone blades with electromagnetic stickers. Being driven into rotary motion, those stickers generate object-specific micro-Doppler signatures, which are interpretable by a surveillance radar from a 5km distance, while an untagged drone is barely seen from several 100s of meters.

关键词： Wireless communication Wireless sensor networks Blades Surveillance Airborne radar Sensors Safety Reliability Transponders Drones

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3D Map Generation for Decommissioning Work

3D Map Generation for Decommissioning Work

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International Conference on Intelligent Autonomous systems (ICoIAS)

作者： Ryoma Hanabusa Yasuto Nagase Satoshi Mitsui Toshifumi Satake Naoki Igo Advanced Course of Production System Engineering National Institute of Technology Asahikawa College Asahikawa Japan Control and Information Engineering National Institute of Technology Asahikawa College Asahikawa Japan

ISBN: (数字)9781728160788

ISBN: (纸本)9781728160795

At the Fukushima Daiichi Nuclear Power Station (NPS), robots are used to propel the decommissioning work. Creating a 3D map of the internal environment of the decommissioning work is a necessary technology for improving the working efficiency of a decommissioning robot. The purpose of this research is to realize a 3D map creating a system using a camera by operating the humanoid general-purpose robot Pepper using the Robot Operating system (ROS) and implementing and executing Visual SLAM. The system aims to be applied to a decommissioning robot in the future. In this study, we implemented Visual SLAM methods R-tab Map, which is a method for constructing 3D maps in real-time, and Large-Scale Direct SLAM, which is method that generates a map using luminance with a large gradient between frames without using features for map generation. We also compared and evaluated the effectiveness of the generated maps. Besides, the robot was manually operated using nao_teleop, which can operate Pepper from the ROS library with the PS3 controller, the visualization software rviz, and the point cloud visualization library PointCloudViewer. Using two Visual SLAM's methods, we implemented the experiment. During the experiment, a chair was placed in front of Pepper as an obstacle. In this environment, Pepper was rotated 360 [deg] by manual operation. However, nao_teleop and Visual SLAM methods caused a conflict between the manual operation of Pepper and the 3D map generation process, and both processes stopped. Therefore, the 3D map wasn't generated. To resolve the conflict with operation, Pepper was moved by human and the experiment was again. As a result, the camera image obtained from Pepper was distorted, the map could not be optimized. Therefore, the part of 3D map was only generated. For this reason, to realize a 3D map generation system, it was important to properly calibrate the camera that could acquire a flat image without distortion.

关键词： Three-dimensional displays Cameras Libraries Robot vision systems

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The rise of intelligent fabric agent from mass-produced advanced fiber materials

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Science Bulletin 2024年第23期69卷 3644-3647页

作者： Pan Li Maiping Yang Yueheng Liu Jing Zhang Sisi He Cuiwei Yang Weizhong Yang Xinyuan Cai Liping Zhu Shenglin Ye Hongyu Sun Chong Hou Ning Zhou Meifang Zhu Guangming Tao Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Mechanical Engineering and Electronic Information China University of Geosciences(Wuhan)Wuhan 430074China Shenzhen Key Laboratory of Flexible Printed Electronics Technology School of ScienceHarbin Institute of TechnologyShenzhen 518055China Department of Biomedical Engineering School of Information Science and TechnologyFudan UniversityShanghai 200433China Shanghai Different Advanced Material Co. Ltd.Shanghai 201502China School of Architecture and Urban Planning Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Meta Reality Lab Meta PlatformsInc.SunnyvaleCA 94089USA School of Nursing Peking UniversityBeijing 100191China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityNational Clinical Research Center for Cardiovascular DiseasesBeijing 100029China Key Laboratory of Vascular Aging Ministry of EducationTongji Hospital Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Physical Education Huazhong University of Science and TechnologyWuhan 430074China

Artificial intelligence(AI)is crucial in driving scientific,technological,and industrial advancements,and it has given rise to an ambient intelligence that can potentially improve the physical execution of healthcare delivery[1,2].Among diverse advanced AI technologies,an intelligent agent with multi-parameter perception,decision-making,and execution capabilities demonstrates the potential for facilitating the development of next-generation optoelectronic *** intelligent agent is a physical or abstract entity that acts autonomously,perceives and interacts with its environment,and communicates with other agents[3].It could perceive dynamic environmental conditions,execute actions,and make appropriate *** emerges as an ideal carrier for human-centered intelligent agents,providing various properties such as perceptibility,adaptability,and *** fabric,known for its unique functionality,has attracted considerable attention from academia and *** 2014,Germany proposed a national strategy called FutureTEX to upgrade the entire textile industry by promoting integration between textiles and other *** years later,the United States announced the establishment of the Revolutionary Fibers and Textiles Manufacturing Innovation institute,which intends to accelerate the revival of fabric *** with conventional fibers,revolutionary fibers focus on the design of multiple materials and structures,enabling the integration of various functionalities into a single *** in the United States,the advent of the digital revolution,advancements in Internet of Things technology,and mature fiber technology significantly boost the development of the intelligent fiber *** commercial applications of intelligent fibers are gradually *** Jacquard,a collaborative effort by Google and Levi’s,presents an intelligent jacket that combines the washability and texture of standard fabrics with the

关键词： agent execution fiber

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Hexagonally ordered microbowl arrays decorated with ultrathin CuInS_(2) nanosheets for enhanced photoelectrochemical performance

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Journal of Energy Chemistry 2020年第12期29卷 134-142页

作者： Ming Li Le Chen Yanjie Su Huan Yin Kexiang Hu State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Electronic Engineering and Automation Guilin University of Electronic TechnologyKey Laboratory of Optoelectronic Information Processing of Guangxi Colleges and Uniy/ersitiesGuilin 541004GuangxiChina Key Laboratory for Thin Film and Microfabrication of the Ministry of Education Department of Micro/Nano ElectronicsSchool of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China National and Local Joint Engineering Laboratory of Internet Technology on Mine School of Information and Control EngineeringChina University of Mining and TechnologyXuzhou 221008JiangsuChina School of Physics and Telecommunication Engineering Guangxi Colleges and Universities Key Lab of Complex System Optimization and Big Data ProcessingYulin Normal UniversityYulin 537400GuangxiChina

This paper demonstrates the design and fabrication of three-dimensional(3 D) hexagonally ordered microbowl arrays(MBAs) decorated with Cu In S2 nanosheets for enhanced photoelectrochemical(PEC) performance. The 3 D MBAs are fabricated by a micro-fabrication technique. The ultrathin CuInS2 nanosheets are grown on the 3 D electrodes by solvothermal transformation of Cu film. The photocurrent density of 3 D photocathode(CuInS2@MBAs) is about two times higher than that of the planar counterpart(CuInS2@Planar). The improved PEC performance can be ascribed to the elevated light trapping ability and the increased surface area for loading photocatalysts. In addition, CdS quantum dots as cocatalysts are modified onto the Cu In S2 nanosheets to further enhance the PEC activity because the formed p-n heterojunction can accelerate the separation of photogenerated carriers. As a result, the 3 D photocathode of CuInS2/CdS@MBAs shows an optimal incident photon to current efficiency of 10% at the wavelength of400 nm. It is believed that this work can be generalized to design other hierarchical 3 D photoelectrodes for improved solar water splitting.

关键词： Microbowl array CuInS_(2) Nanosheet Photocathode Photoelectrochemical performance

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Crossbar Wiring for III-V/Si MOS Optical Phase Shifters with Diode Selectors

Crossbar Wiring for III-V/Si MOS Optical Phase Shifters with...

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European Conference on Optical Communication (ECOC)

作者： Hanzhi Tang Rui Tang Junichi Fujikata Masataka Noguchi Shigeki Takahashi Kasidit Toprasertpong Shinichi Takagi Mitsuru Takenaka Department of Electrical Engineering and Information Systems The University of Tokyo Tokyo Japan Department of Optical Science and Technology Tokushima University Tokushima Japan National Institute of Advanced Industrial Science and Technology (AIST) Japan Photonics Electronics Technology Research Association (PETRA) Tsukuba Ibaraki Japan

We proposed a crossbar wiring scheme for voltage-driven III-V/Si MOS optical phase shifters with diode selectors. We experimentally demonstrated the pulse-amplitude control and verified the selection functionality. Th... 详细信息

ISBN: (数字)9781957171159

ISBN: (纸本)9781665475570

关键词： Wiring Power demand Contacts Phase shifters Europe Optical fiber communication

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