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Low Latency Fiber Communication system Equalizer Based on Photonic Reservoir Computing

Low Latency Fiber Communication System Equalizer Based on Ph...

2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Zuo, Xiaoyan Pei, Li Bai, Bing Bai, Bowen Wang, Jianshuai Sui, Juan Institute of Lightwave Technology Beijing Jiaotong University Key Laboratory of All-Optical Networks and Modern Communication Networks of Ministry of Education Beijing China School of Electronics Peking University State Key Laboratory of Advanced Optical Communications System and Networks Beijing China Technology Co. Ltd Beijing China

ISBN: (纸本)9798350312614

We demonstrate a low latency fiber channel distortion equalizer that implements mainly of the equalization calculations in the optical domain, based on an integrated photonic reservoir computing chip. We discussed the equalization effect of the equalizer under different dispersion noise and optical signal-to-noise ratio (OSNR) conditions. The bit error rate (BER) of the C-band with 25Gb/s on-off key (OOK) distorted signal in 25km standard single-mode fiber (SSMF) has been reduced by 3 orders of magnitude. By optimizing weights, this equalizer can adapt to link impairments. It can effectively equalize the distorted signals at data rates of 10-40 Gb/s over 25km in SSMF transmission. Furthermore, it can efficiently equalize the impaired signals after 5-40km SSMF transmission at a signal rate of 25Gb/s. © 2023 IEEE.

关键词： equalizer low latency photonic reservoir computing silicon photonics

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Multi-Task Learning: Towards Low-Complexity Neural Network Nonlinearity Compensation in Coherent Optical systems

Multi-Task Learning: Towards Low-Complexity Neural Network N...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Tonghui Ji Qi Wu Zhaopeng Xu Honglin Ji Yu Yang Lulu Liu Shangcheng Wang Zhongliang Sun Junpeng Liang Linsheng Fan Jianwei Tang Jinlong Wei Juhao Li Weisheng Hu Pengcheng Laboratory Shenzhen China State Key Lab of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication Systems & Networks Peking University Beijing China

We propose multi-task learning based NN equalization for nonlinearity compensation in coherent optical system. Compared with conventional NN equalization, 30% complexity reduction is achieved in an 800-Gb/s PDM-16QAM ... 详细信息

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： Q-factor Equalizers Symbols Artificial neural networks Optical computing Optical fiber networks Multitasking Real-time systems Complexity theory Photonics

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An Approach for Predicting and Compensating the End Deformation of a Heavy Load robot for Friction Stir Welding 16th

An Approach for Predicting and Compensating the End Deformat...

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16th International Federation of Theory of Machines and Mechanisms World Congress, IFToMM WC 2023

作者： Bai, Yujie Liu, Haitao Meng, Shaofei Ma, Yue Yue, Wei Li, Guangxi Xiao, Juliang Wang, Guofeng Ding, Yabin Key Laboratory of Mechanism Theory and Equipment Design of State Ministry of Education Tianjin University Tianjin300072 China Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin300384 China Dongguan University of Technology Dongguan523808 China

ISBN: (纸本)9783031457043

Aiming at solving the problem of insufficient plunge depth by the deformation of friction stir welding robots, this paper presents a method for predicting and compensating for the end deformation of friction stir welding robots. Firstly, the numerical model of FSW is established using DEFORM-3D software, then the axial force on the welding tool is obtained. Subsequently, the robot stiffness model is established based on the screw theory to realize the prediction of robot deformation in the workspace. Finally, a deformation compensation method based on the mirror principle is proposed to realize the compensation of the welding trajectory. Taking the 10 mm AA6061 aluminium alloy FSW as an example, the compensation method proposed in this paper is verified by using computer simulation. The results show that the stiffness model established in this paper can accurately predict the end deformation of the robot. The maximum plunge depth deviation of the compensation method proposed in this paper is reduced by 95.17% compared with the uncompensated case, which proves the effectiveness of the proposed compensation method. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Friction stir welding

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User Selection and Resource Allocation for Satellite-Based Multi-task Federated Learning system 4th

User Selection and Resource Allocation for Satellite-Based M...

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4th International Conference on Artificial Intelligence in China, AIC 2022

作者： Zhang, Mingyu Wu, Xiaoyong Zhang, Zhilong Liu, Danpu Yin, Fangfang Beijing Laboratory of Advanced Information Network Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China Shanghai Radio Equipment Research Institute Shanghai201109 China State Key Laboratory of Media Convergence and Communication School of Information and Communication Communication University of China Beijing100024 China

ISBN: (纸本)9789819912551

In view of the development of low-orbit satellite constellation and the increasing demand for computing ability and privacy protection of space-based applications, a satellite-based multi-task federated learning system is designed. Specifically, with consideration of both the fluctuations of satellite-to-ground communication links and local training impacts on global models, a user selection strategy is established. On this basis, the functional relationship between task convergence speed and wireless communication factors is analyzed, and the KM optimal matching algorithm is adopted to dynamically allocate communication resources. Simulation results show that our proposed scheme outperforms baseline methods in both total weighted error rate and accuracy, and achieves the fastest convergence rate at the same time. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Satellites

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Field effect transistor-based tactile sensors: From sensor configurations to advanced applications

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InfoMat 2023年第1期5卷 1-61页

作者： Jian Wang Shuyan Xu Congcong Zhang Ailing Yin Mingyuan Sun Hongru Yang Chenguo Hu Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongUniversity of JinanJinanPeople's Republic of China Department of Applied Physics State Key Laboratory of Power Transmission Equipment&System Security and New TechnologyChongqing UniversityChongqingPeople's Republic of China Department of Physics School of Physical Science and TechnologyUniversity of JinanJinanPeople's Republic of China State key Laboratory of Crystal Materials Shandong UniversityJinanPeople's Republic of China

The past several decades have witnessed great progress in high-performance field effect transistors(FET)as one of the most important electronic *** the same time,due to their intrinsic advantages,such as multiparameter accessibility,excellent electric signal amplification function,and ease of large-scale manufacturing,FET as tactile sensors for flexible wear-able devices,artificial intelligence,Internet of Things,and other fields to per-ceive external stimuli has also attracted great attention and become a significant field of general *** importantly,FET has a unique three-terminal structure,which enables its different components to detect external mechanics through different sensing *** one hand,it provides an important platform to shed deep insights into the underlying mechanisms of the tactile *** the other hand,these properties could in turn endow excellent components for the construction of tactile matrix sensor arrays with high *** special emphasis on the configuration of FETs,this review classified and summarized structure-optimized FET tactile sensors with gate,dielectric layer,semiconductor layer,and source/drain electrodes as sensing active components,*** working principles and the state-of-the-art protocols in terms of high-performance tactile sensors are detail discussed and highlighted,the innovative pixel distribution and integration analysis of the transistor sensor matrix array concerning flexible electronics are also *** hope that the introduction of this review can provide some inspiration for future researchers to design and fabricate high-performance FET-based tactile sensor chips for flexible electronics and other fields.

关键词： field-effect transistor flexible electronics tactile matrix sensor array tactile sensors

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Mechanism Design and Walking Stability Study of (2UPS-U) +R Series-Parallel Hybrid Bionic Wheel-Legged Quadruped robot*

Mechanism Design and Walking Stability Study of (2UPS-U) +R ...

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IEEE International Conference on robotics and Biomimetics

作者： Shanshan Li Hongbo Wang Dong Li Minghao Li Lianqing Li Yu Tian Jianye Niu Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System Yanshan University Qinhuangdao China Academy for Engineering & Technology Fudan University Shanghai China Hebei Provincial Key Laboratory of Parallel Robot and Mechatronic System and Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education of China Yanshan University Qinhuangdao China

In this paper, a bionic-based design of a series-parallel hybrid wheel-legged quadruped robot that can realize wheel-foot transformations is presented to achieve footed stable walking, and a method of measuring the static stability of the robot by the evaluation of the torque of the supporting leg rotor axis is proposed with the consideration of the robot's leg mass. Firstly, the whole robot position is solved; Secondly, the force on the robot during static walking is analyzed, and the stability of its static walking is also analyzed from the moment perspective; Finally, the stabilizing support region for static walking is solved, and the stabilizing support region for the robot in such a motion state is calculated. This paper provides high reference significance and value for the mechanism design and walking stability research of series-parallel hybrid wheel-legged quadruped robots.

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Tuning 2D magnetism in Fe3+XGeTe2 films by element doping

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National Science Review 2022年第6期9卷 163-170页

作者： Shanshan Liu Zihan Li Ke Yang Enze Zhang Awadhesh Narayan Xiaoqian Zhang Jiayi Zhu Wenqing Liu Zhiming Liao Masaki Kudo Takaaki Toriyama Yunkun Yang Qiang Li Linfeng Ai Ce Huang Jiabao Sun Xiaojiao Guo Wenzhong Bao Qingsong Deng Yanhui Chen Lifeng Yin Jian Shen Xiaodong Han Syo Matsumura Jin Zou Yongbing Xu Xiaodong Xu Hua Wu Faxian Xiu State Key Laboratory of Surface Physics and Department of Physics Fudan University Institute for Nanoelectronic Devices and Quantum Computing Fudan University College of Science University of Shanghai for Science and Technology Laboratory for Computational Physical Sciences(MOE) Fudan University Solid State and Structural Chemistry Unit Indian Institute of Science School of Electronic Science and Engineering Nanjing University Department of Physics University of Washington Department of Electronic Engineering Royal Holloway University of London Materials Engineering The University of Queensland Beijing Key Laboratory of Microstructure and Property of Advanced Materials Institute of Microstructure and Property of Advanced Materials Beijing University of Technology The Ultramicroscopy Research Center Kyushu University State Key Laboratory of ASIC and System School of Microelectronics Fudan University Collaborative Innovation Center of Advanced Microstructures Department of Applied Quantum Physics and Nuclear Engineering Kyushu University Centre for Microscopy and Microanalysis The University of Queensland Shanghai Research Center for Quantum Sciences

Two-dimensional（2D） ferromagnetic materials have been discovered with tunable magnetism and orbital-driven nodal-line features. Controlling the 2D magnetism in exfoliated nanoflakes via electric/magnetic fields enables a boosted Curie temperature（TC） or phase transitions. One of the challenges, however, is the realization of high TC2D magnets that are tunable, robust and suitable for large scale fabrication. Here, we report molecular-beam epitaxy growth of wafer-scale Fe3+XGeTe2films with TCabove room temperature. By controlling the Fe composition in Fe3+XGeTe2, a continuously modulated TCin a broad range of 185–320 K has been achieved. This widely tunable TCis attributed to the doped interlayer Fe that provides a 40% enhancement around the optimal composition X = 2. We further fabricated magnetic tunneling junction device arrays that exhibit clear tunneling signals. Our results show an effective and reliable approach, i.e. element doping, to producing robust and tunable ferromagnetism beyond room temperature in a large-scale 2D Fe3+XGeTe2fashion.

关键词： 2D ferromagnetic material Fe3+XGeTe2 film element doping above room temperature TC tunability

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Influence of the NAO on Wintertime Surface Air Temperature over East Asia:Multidecadal Variability and Decadal Prediction

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Advances in Atmospheric Sciences 2022年第4期39卷 625-642页

作者： Jianping LI Tiejun XIE Xinxin TANG Hao WANG Cheng SUN Juan FENG Fei ZHENG Ruiqiang DING Frontiers Science Center for Deep Ocean Multispheres and Earth System-Key Laboratory of Physical Oceanography-Institute for Advanced Ocean Studies-Academy of the Future Ocean Ocean University of ChinaQingdao 266100China Laboratory for Ocean Dynamics and Climate Pilot Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China College of Global Change and Earth System Sciences Beijing Normal UniversityBeijing 100875China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China

In this paper,we investigate the influence of the winter NAO on the multidecadal variability of winter East Asian surface air temperature(EASAT)and EASAT decadal *** observational analysis shows that the winter EASAT and East Asian minimum SAT(EAmSAT)display strong in-phase fluctuations and a significant 60-80-year multidecadal variability,apart from a long-term warming *** winter EASAT experienced a decreasing trend in the last two decades,which is consistent with the occurrence of extremely cold events in East Asia winters in recent *** winter NAO leads the detrended winter EASAT by 12-18 years with the greatest significant positive correlation at the lead time of 15 *** analysis shows that ENSO may affect winter EASAT interannual variability,but does not affect the robust lead relationship between the winter NAO and *** present the coupled oceanic-atmospheric bridge(COAB)mechanism of the NAO influences on winter EASAT multidecadal variability through its accumulated delayed effect of~15 years on the Atlantic Multidecadal Oscillation(AMO)and Africa-Asia multidecadal teleconnection(AAMT)*** NAO-based linear model for predicting winter decadal EASAT is constructed on the principle of the COAB mechanism,with good hindcast *** winter EASAT for 2020-34 is predicted to keep on fluctuating downward until~2025,implying a high probability of occurrence of extremely cold events in coming winters in East Asia,followed by a sudden turn towards sharp *** predicted 2020/21 winter EASAT is almost the same as the 2019/20 winter.

关键词： winter East Asian surface air temperature North Atlantic Oscillation Atlantic Multidecadal Oscillation Africa-Asia multidecadal teleconnection pattern coupled oceanic-atmospheric bridge multidecadal variability

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A grid-assisted 3D printing method for magnetically driven micro soft robot 9

A grid-assisted 3D printing method for magnetically driven m...

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9th International Conference on advanced Manufacturing Technology and Materials Science, AMTMS 2021

作者： Gao, Jian Gao, Peng Rong, Weibin Li, Dongjie Wang, Lefeng State Key Laboratory of Robotics and System Harbin Institute of Technology Heilongjiang Harbin150001 China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Heilongjiang Harbin150080 China

The magnetically driven micro soft robot is one of the research hotspots in the field of micro robots. A 3D printing method for manufacturing micro soft robots with the help of auxiliary grids is proposed. The shape flexibility of the micro soft robots manufactured by the micro 3D printing method can be improved, and internal structures composed of different materials inside the micro robots can be printed using this method. The technical details of the grid-assisted 3D printing process are introduced in this article. Micro soft robots with specific patterns were 3D printed, and the deformation and movement capabilities of the robots were verified in magnetically driven motion experiments. The experimental results prove that the grid-assisted 3D printing technology can not only manufacture magnetically driven micro soft robots, but also adjust the internal structure and motion performance of the robots. © 2022 Institute of Physics Publishing. All rights reserved.

关键词： 3D printers

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Electrolyte design principles for low-temperature lithium-ion batteries

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eScience 2023年第6期3卷 9-22页

作者： Yang Yang Wuhai Yang Huijun Yang Haoshen Zhou Graduate School of System and Information Engineering University of Tsukuba1-1-1TennoudaiTsukuba 305-8573Japan Center of Energy Storage Materials&Technology College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsNational Laboratory of Solid State Micro-structuresand Collaborative Innovation Center of Advanced Micro-structuresNanjing UniversityNanjing 210093PR China

Alongside the pursuit of high energy density and long service life,the urgent demand for low-temperature performance remains a long-standing challenge for a wide range of Li-ion battery applications,such as electric vehicles,portable electronics,large-scale grid systems,and special space/seabed/military *** Li-ion batteries suffer a major loss of capacity and power and fail to operate normally when the temperature decreases to-20℃.This deterioration is mainly attributed to poor Li-ion transport in a bulk carbonated ester electrolyte and its derived solid–electrolyte interphase(SEI).In this mini-review discussing the limiting factors in the Li-ion diffusion process,we propose three basic requirements when formulating electrolytes for low-temperature Liion batteries:low melting point,poor Liþaffinity,and a favorable ***,we briefly review emerging progress,including liquefied gas electrolytes,weakly solvating electrolytes,and localized high-concentration *** proposed novel electrolytes effectively improve the reaction kinetics via accelerating Li-ion diffusion in the bulk electrolyte and *** final part of the paper addresses future challenges and offers perspectives on electrolyte designs for low-temperature Li-ion batteries.

关键词： Low temperatures Li-ion batteries Electrolyte design Li-ion diffusion Solid–electrolyte interphase

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