检索结果-内蒙古大学图书馆

Modulation format identification in fiber communications using single dynamical node-based photonic reservoir computing

引用

Photonics Research 2021年第1期9卷 I0010-I0017页

作者： QIANG CAI YA GUO PU LI ADONIS BOGRIS KALAN SHORE YAMEI ZHANG YUNCAI WANG Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China School of Electronics and Information Northwestern Polytechnical UniversityXi'an 710072China School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai UniversityShanghai 200444China Department of Informatics and Computer Engineering University of West AtticaAthens 12243Greece School of Electronic Engineering Bangor UniversityWales LL571UTUK Key Laboratory of Radar Imaging and Microwave Photonics Ministry of EducationNanjing University of Aeronautics and AstronauticsNanjing 210016China

We present a simple approach based on photonic reservoir computing(P-RC)for modulation format identification(MFI)in optical fiber *** an optically injected semiconductor laser with self-delay feedback is trained with the representative features from the asynchronous amplitude histograms of modulation *** simulations are conducted for three widely used modulation formats(on–off keying,differential phase-shift keying,and quadrature amplitude modulation)for various transmission situations where the optical signal-to-noise ratio varies from 12 to 26 d B,the chromatic dispersion varies from-500 to 500 ps/nm,and the differential group delay varies from 0 to 20 *** these situations,final simulation results demonstrate that this technique can efficiently identify all those modulation formats with an accuracy of>95%after optimizing the control parameters of the P-RC layer such as the injection strength,feedback strength,bias current,and frequency *** proposed technique utilizes very simple devices and thus offers a resource-efficient alternative approach to MFI.

关键词： fiber tuning computing

来源：评论

学校读者我要写书评

暂无评论

High-sensitive multi-stage terahertz wave parametric up-conversion detection based on KTiOPO4 crystal

High-sensitive multi-stage terahertz wave parametric up-conv...

引用

International Conference on Infrared and Millimeter Waves

作者： Y. Y. Wang C. H. Hu K. Chen C. Yan D. G. Xu Y. Takida H. Minamide J. Q. Yao Institute of Laser and Optoelectronics College of Precision Instrument and Opto-electronics Engineering Tianjin University Tianjin China Key Laboratory of Optoelectronic Information Technology (Ministry of Education) Tianjin University Tianjin China Micro Optical Electronic Mechanical System Technology Laboratory Tianjin University Tianjin China RIKEN Center for Advanced Photonics RIKEN 519-1399 Aramaki-Aoba Aoba-ku Sedai Miyagi Japan

ISBN: (数字)9781728194271

ISBN: (纸本)9781728194288

A highly sensitive multi-stage terahertz (THz) wave parametric up-conversion detector based on KTiOPO 4 (KTP) crystal pumped by 1064nm laser (10 ns, 10Hz) was demonstrated in this paper. The up-conversion signal was amplified in two KTP crystals based on non-collinear and collinear phase matching respectively to improve detection sensitivity. The detectable THz frequency range was 4.30-4.47 THz and 4.81-4.95 THz. The minimum detectable energy of 244pJ was realized with dynamic range of 36dB at 4.45THz, which was an order of magnitude higher than that of commercial Golay cell. Compared with LiNbO 3 crystal, the parametric up-conversion detection based on KTP crystal can realize high frequency range (>3 THz) THz wave detection.

关键词： Sensitivity Lithium niobate Crystals Detectors Dynamic range Frequency conversion Laser excitation

来源：评论

学校读者我要写书评

暂无评论

Analyzing and Recognizing Pedestrian Motion Using 3D Sensor Network and Machine Learning 33rd

Analyzing and Recognizing Pedestrian Motion Using 3D Sensor ...

引用

33rd International Conference on advanced information Networking and Applications, AINA 2019

作者： Sun, Ningping Tsuruoka, Toru Murakami, Shunsuke Sakamoto, Takuma Department of Human-Oriented Information System Engineering National Institute of Technology Kumamoto College 2659-2 Suya KoshiKumamoto861-1102 Japan Advanced Electronics and Information Systems Engineering Course National Institute of Technology Kumamoto College 2659-2 Suya KoshiKumamoto861-1102 Japan

ISBN: (纸本)9783030150341

How to analyze and recognize pedestrian movements is an important issue dependent on motion capture devices. In our work, we used two types of popular 3D sensors such as 3D depth sensor and 3D motion sensor to construct a sensor network for tacking motion of target because of their convenience and low cost. In this paper, we first describe how to get data from the sensor network and how to process raw data. Next, we provide algorithms for applying machine learning to the analysis and recognition of human motions. Finally, we give some evaluation experimental results. © 2019, Springer Nature Switzerland AG.

关键词： Sensor networks

来源：评论

学校读者我要写书评

暂无评论

Semidiscrete optical vortex droplets in quasi-phase-matched photonic crystals

arXiv

引用

arXiv 2023年

作者： Xu, Xiaoxi Zhao, Feiyan Huang, Jiayao He, Hexiang Zhang, Li Chen, Zhaopin Nie, Zhongquan Malomed, Boris A. Li, Yongyao School of Physics and Optoelectronic Engineering Foshan University Foshan528000 China School of Electronic and Computer Engineering Peking University Shenzhen518055 China Physics Department Solid-State Institute Technion Haifa32000 Israel Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Electronic Information and Optical Engineering Taiyuan University of Technology Taiyuan030024 China Department of Physical Electronics School of Electrical Engineering Faculty of Engineering Tel Aviv University Tel Aviv69978 Israel Instituto de Alta Investigación Universidad de Tarapacá Casilla 7D Arica Chile Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology Foshan University Foshan528000 China

A new scheme for producing semidiscrete self-trapped vortices ("swirling photon droplets") in photonic crystals with competing quadratic (χ(2)) and self-defocusing cubic (χ(3)) nonlinearities is proposed. The photonic crystal is designed with a striped structure, in the form of spatially periodic modulation of the χ(2) susceptibility, which is imposed by the quasi-phase-matching technique. Unlike previous realizations of semidiscrete optical modes in composite media, built as combinations of continuous and arrayed discrete waveguides, the semidiscrete vortex "droplets" are produced here in the fully continuous medium. This work reveals that the system supports two types of semidiscrete vortex droplets, viz., onsite- and intersite-centered ones, which feature, respectively, odd and even numbers of stripes, N. Stability areas for the states with different values of N are identified in the system's parameter space. Some stability areas overlap with each other, giving rise to the multistability of states with different N. The coexisting states are mutually degenerate, featuring equal values of the Hamiltonian and propagation constant. An experimental scheme to realize the droplets is outlined, suggesting new possibilities for the long-distance transmission of nontrivial vortex beams in nonlinear media. © 2023, CC BY.

关键词： Photonic crystals

来源：评论

学校读者我要写书评

暂无评论

Reconfigurable Intelligent Surface Assisted High-Speed Train Communications: Coverage Performance Analysis and Placement Optimization

arXiv

引用

arXiv 2023年

作者： Liu, Changzhu He, Ruisi Niu, Yong Han, Zhu Ai, Bo Gao, Meilin Ma, Zhangfeng Wang, Gongpu Zhong, Zhangdui The State Key Laboratory of Advanced Rail Autonomous Operation The School of Electronics and Information Engineering The Frontiers Science Center for Smart High-speed Railway System The Beijing Engineering Research Center of High-Speed Railway Broadband Mobile Communications Beijing Jiaotong University Beijing100044 China The State Key Laboratory of Advanced Rail Autonomous Operation Beijing Jiaotong University Beijing100044 China The National Mobile Communications Research Laboratory Southeast University Nanjing211189 China The Department of Electrical and Computer Engineering The University of Houston HoustonTX77004 United States The Department of Computer Science and Engineering Kyung Hee University Seoul446-701 Korea Republic of Henan Joint International Research Laboratory of Intelligent Networking and Data Analysis Zhengzhou University Zhengzhou450001 China Research Center of Networks and Communications Peng Cheng Laboratory Shenzhen China The Tsinghua Space Center the Beijing National Research Center for Information Science and Technology Tsinghua University Beijing100091 China The College of Information Engineering Shaoyang University Shaoyang422000 China The Beijing Key Lab of Transportation Data Analysis and Mining School of Computer and Information Technology Beijing Jiaotong University Beijing100044 China

Reconfigurable intelligent surface (RIS) emerges as maximization problem is formulated to facilitate RIS discrete an efficient and promising technology for the next wireless phase design and RIS placement optimization, which is subject generation networks and has attracted a lot of attention owing to coverage probability constraint. Simulation results validate to the capability of extending wireless coverage by reflecting that better coverage performance and higher travel distance signals toward targeted receivers. In this paper, we consider can be achieved with deployment of RIS. The impacts of some a RIS-assisted high-speed train (HST) communication system key system parameters including transmission power, signal-to-to enhance wireless coverage and improve coverage probability. noise ratio threshold, number of RIS elements, number of RIS First, coverage performance of the downlink single-input-single- quantization bits, horizontal distance between base station and output system is investigated, and the closed-form expression RIS, and speed of HST on system performance are investigated. of coverage probability is derived. Moreover, travel distance In addition, it is found that RIS can well improve coverage probability with limited power consumption for HST communications. Copyright © 2023, The Authors. All rights reserved.

关键词： Railroads

来源：评论

学校读者我要写书评

暂无评论

Geometry-Based Channel Modeling for Bistatic Integrated Sensing and Communication Vehicular Networks

引用

IEEE Communications Letters 2025年

作者： Jin, Yunwei He, Ruisi Ai, Bo Yuan, Yuan Zhang, Haoxiang Liu, Bincheng Beijing Jiaotong University State Key Laboratory of Advanced Rail Autonomous Operation the School of Electronics and Information Engineering the Frontiers Science Center for Smart High-speed Railway System Beijing100044 China Ministry of Industry and Information Technology China Academy of Industrial Internet Beijing100804 China Chinese Academy of Sciences Aerospace Information Research Institute Beijing100094 China

Integrated Sensing and Communication (ISAC) has recently attracted significant attention. Vehicular networks (VNs) require communication links to effectively leverage dynamic information of surrounding vehicles. This necessity renders ISAC particularly suitable for vehicular applications, as it simultaneously provides robust communication and high-precision sensing capabilities. In this letter, we investigate channel modeling for bistatic ISAC in VNs, where the multi-functional vehicular transmitter is designed to communicate with the receiver while operating in a bistatic configuration with the sensing unit. To enhance generality of the model, we use an elliptical geometry structure to describe scatterers distribution, and derive channel impulse response for both the communication and sensing channels. The proposed model can be adapted to various bistatic sensing scenarios by adjusting the parameters. Subsequently, we analyze space-time-frequency correlation function. Numerical results indicate that the sensing channel has longer coherence time, while it exhibits greater sensitivity to variations in terminal velocity. © 1997-2012 IEEE.

关键词： Geometry

来源：评论

学校读者我要写书评

暂无评论

A chemically mediated artificial neuron (Sept, 10.1038/s41928-022-00803-0, 2022)

引用

NATURE electronics 2022年第9期5卷 622-622页

作者： Wang, Ting Wang, Ming Wang, Jianwu Yang, Le Ren, Xueyang Song, Gang Chen, Shisheng Yuan, Yuehui Liu, Ruiqing Pan, Liang Li, Zheng Leow, Wan Ru Luo, Yifei Ji, Shaobo Cui, Zequn He, Ke Zhang, Feilong Lv, Fengting Tian, Yuanyuan Cai, Kaiyu Yang, Bowen Niu, Jingyi Zou, Haochen Liu, Songrui Xu, Guoliang Fan, Xing Hu, Benhui Loh, Xian Jun Wang, Lianhui Chen, Xiaodong State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications Nanjing China Innovative Center for Flexible Devices (iFLEX) Max Planck–NTU Joint Lab for Artificial Senses School of Materials Science and Engineering Nanyang Technological University Singapore Singapore Frontier Institute of Chip and System Fudan University Shanghai China Institute of Materials Research and Engineering Agency for Science Technology and Research (A*STAR) Singapore Singapore School of Biomedical Engineering and Informatics Nanjing Medical University Nanjing China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing China College of Chemistry University of Chinese Academy of Sciences Beijing China

Brain–machine interfaces typically rely on electrophysiological signals to interpret and transmit neurological information. In biological systems, however, neurotransmitters are chemical-based interneuron messengers. This mismatch can potentially lead to incorrect interpretation of the transmitted neuron information. Here we report a chemically mediated artificial neuron that can receive and release the neurotransmitter dopamine. The artificial neuron detects dopamine using a carbon-based electrochemical sensor and then processes the sensory signals using a memristor with synaptic plasticity, before stimulating dopamine release through a heat-responsive hydrogel. The system responds to dopamine exocytosis from rat pheochromocytoma cells and also releases dopamine to activate pheochromocytoma cells, forming a chemical communication loop similar to interneurons. To illustrate the potential of this approach, we show that the artificial neuron can trigger the controllable movement of a mouse leg and robotic hand.

关键词： Neurons

来源：评论

学校读者我要写书评

暂无评论

Recent progress of integrated circuits and optoelectronic chips

引用

Science China(information Sciences) 2021年第10期64卷 103-135页

作者： Yue HAO Shuiying XIANG Genquan HAN Jincheng ZHANG Xiaohua MA Zhangming ZHU Xingxing GUO Yahui ZHANG Yanan HAN Ziwei SONG Yan LIU Ling YANG Hong ZHOU Jiangyi SHI Wei ZHANG Min XU Weisheng ZHAO Biao PAN Yangqi HUANG Qi LIU Yimao CAI Jian ZHU Xin OU Tiangui YOU Huaqiang WU Bin GAO Zhiyong ZHANG Guoping GUO Yonghua CHEN Yong LIU Xiangfei CHEN Chunlai XUE Xingjun WANG Lixia ZHAO Xihua ZOU Lianshan YAN Ming LI School of Microelectronics Xidian University State Key Laboratory of Integrated Service Networks Xidian University National Integrated Circuit Innovation Center School of Microelectronics Fudan University School of Integrated Circuit Science and Engineering Beihang University China Center for Information Industry Development Frontier Institute of Chip and System Fudan University Institute of Microelectronics Peking University Nanjing Electronic Devices Institute State Key Laboratory of Functional Material for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Institute of Microelectronics Tsinghua University Center for Carbon-based Electronics Department of Electronics Peking University CAS Key Laboratory of Quantum Information University of Science and Technology of China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Origin Quantum Computing Company Limited Key Laboratory of Flexible Electronics & Institute of Advanced Materials Nanjing Tech University State Key Laboratory of Electronic Thin Films and Integrated Devices School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China National Laboratory of Solid State Microstructures & College of Engineering and Applied Sciences Nanjing University State Key Laboratory on Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University School of Electrical and Electronic Engineering Tiangong University Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiaotong University School of Electronic Electrical and Communication Engineering

Integrated circuits(ICs) and optoelectronic chips are the foundation stones of the modern information society. The IC industry has been driven by the so-called "Moore's law" in the past 60 years, and now has entered the post Moore's law era. In this paper, we review the recent progress of ICs and optoelectronic chips. The research status, technical challenges and development trend of devices, chips and integrated technologies of typical IC and optoelectronic chips are focused on. The main contents include the development law of IC and optoelectronic chip technology, the IC design and processing technology, emerging memory and chip architecture, brain-like chip structure and its mechanism, heterogeneous integration, quantum chip technology, silicon photonics chip technology, integrated microwave photonic chip, and optoelectronic hybrid integrated chip.

关键词： integrated circuit semiconductor science and technology optoelectronic device and chip photonic integrated circuit wide bandgap semiconductors silicon photonics hybrid integration quantum chip integrated microwave photonic photonic neural computing

来源：评论

学校读者我要写书评

暂无评论

1080-Nm dispersion-managed figure-8 fiber laser with a phase-biased nonlinear amplifying loop mirror

引用

Optics Communications 2025年 589卷

作者： Gao, Kong Dong, Li Pan, Zhongben Chu, Hongwei Pan, Han Wang, Aimin Liu, Yizhou Li, Dechun School of Information Science and Engineering Shandong University Qingdao266237 China College of Physics Science Qingdao University Qingdao266071 China State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China Center for Optics Research and Engineering Shandong University Qingdao266237 China

We report on a dispersion-managed figure-8 fiber laser with a phase-biased nonlinear amplifying loop mirror (NALM). This figure-8 fiber laser incorporated a non-reciprocal phase bias and an unparallel grating pair in the optical cavity, enabling a self-starting mode-locking state with good wavelength tunability. Numerical simulations were employed to simulate the optical dynamics of the mode-locking laser pulse inside the fiber cavity, indicating the evolution of the spectral bandwidth, pulse duration, and pulse energy at different intracavity positions. A 26.4-MHz, 1080.3-nm mode-locking laser was realized from experiment based on the numerical results. The output powers delivered from the polarization beam splitter (PBS) and the fiber output coupler (FOC) were 1.04 mW and 0.15 mW, with the corresponding pulse durations of 0.97 ps and 0.84 ps, respectively. The integrated relative intensity noise (RIN) of the 1080.3-nm mode-locking laser was 0.059 % [10 Hz, 1 MHz]. The central wavelength of the figure-8 mode-locking fiber laser can be further tuned from 1040.8 nm to 1083.6 nm, based on the intracavity optical spectral filter introduced by the grating pair. This work can provide a reliable seed source for high-energy fiber laser systems. © 2025 Elsevier B.V.

关键词： Laser mirrors

来源：评论

学校读者我要写书评

暂无评论

Deterministic bulk-boundary correspondences for skin and edge modes in a general two-band non-Hermitian system

引用

Physical Review Research 2022年第4期4卷 043222-043222页

作者： Chong Hou Lingfang Li Shihua Chen Yi Liu Luqi Yuan Yiqi Zhang Zhenhua Ni School of Physics and Frontiers Science Center for Mobile Information Communication and Security Southeast University Nanjing 211189 China Purple Mountain Laboratories Nanjing 211111 China Shanghai Key Lab of Modern Optical System University of Shanghai for Science and Technology Shanghai 200093 China CAS Center for Excellence in Ultra-Intense Laser Science Shanghai 201800 China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique School of Electronic Science and Engineering Faculty of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China

In isolated Hermitian systems, the bulk-boundary correspondence is generally thought of as a compelling principle guiding the occurrence of robust edge states through the topological invariants of the bulk. However, in open non-Hermitian systems that support non-Hermitian skin effects, the universality of the bulk-boundary correspondence has so far remained disputable in spite of being subjected to intensive studies. Here we provide analytical and numerical evidence of bulk-boundary correspondences for both skin and edge modes in 1D two-band non-Hermitian systems within the framework of a prototypical non-Hermitian Su-Schrieffer-Heeger model. Two different topological winding numbers, one on a Brillouin zone and the other on a generalized Brillouin zone, are defined to fully characterize the topological phases of matter and to understand such deterministic correspondences. In addition to the exact solutions for bulk states, we also obtain explicit solution forms for edge modes along with analytical conditions for their existence and localization, all exhibiting remarkable agreement with numerical results. Our results solve the elusive non-Hermitian topology and may facilitate experimental investigations of bulk-boundary correspondence in a wide range of non-Hermitian systems.

关键词： Edge states Skin effect Topological phases of matter Non-Hermitean systems Topological materials

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：