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SSRN 2023年

作者： Xiong, Shixian Ke, Hongcheng Cao, Lei Wang, Yu Zhu, Qian Zhong, Liqin Fan, Lanlan Gu, Feng Nanchang Key Laboratory for Advanced Manufacturing of Electronic Information Materials and Devices Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particulate Systems International Institute for Innovation Jiangxi University of Science and Technology Nanchang330013 China

Exploring cathode materials that combine excellent cycling stability and high energy density remains challenging for aqueous zinc ion hybrid supercapacitors (ZHSCs). Herein, polyaniline (PANI) coated BCN nanoarray on carbon cloth surface is prepared as advanced cathode materials via simple high-temperature calcination and electrochemical deposition methods. Due to the high specific capacity and conductivity of PANI, the CC@BCN@PANI core-shell nanoarrays cathode shows excellent ion storage capability. Furthermore, the 3D nanoarray structure can provide enough space for the volume expansion and contraction of PANI during the charging and discharging process, which effectively avoids the collapse of the microstructure and greatly improves the electrochemical stability of PANI. Therefore, the CC@BCN@PANI based ZHSCs exhibit the superior electrochemical performances with a high capacity of 145.8 mAh g-1 (0.5 A g-1), a high energy and power density of 116.78 Wh kg-1 and 12 W kg-1, and a high-capacity retention rate of 86.2% at 2 A g-1 after 8000 cycles. In addition, the flexible Zn-ion hybrid supercapacitors (FZHSCs) are also investigated, and show a high capacity of 160 mAh g-1 (0.1 A g-1), and a capacity retention rate of 87.7% at 2 A g-1 after 450 cycles. © 2023, The Authors. All rights reserved.

关键词： Cathodes

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Erratum to: Depth estimation using an improved stereo network (Frontiers of Information technology & Electronic Engineering, (2022), 23, 5, (777-789), 10.1631/FITEE.2000676)

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Frontiers of Information technology and Electronic Engineering 2023年 1-1页

作者： Xu, Wanpeng Zou, Ling Wu, Lingda Qi, Yue Qian, Zhaoyong Science and Technology on Complex Electronic System Simulation Laboratory Space Engineering University Beijing101416 China Peng Cheng Laboratory Shenzhen518055 China Digital Media School Beijing Film Academy Beijing100088 China

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On-Chip Wideband Bandpass Filter with High Frequency Selectivity and Low Insertion Loss Based on GaAs Integrated Passive Device technology

On-Chip Wideband Bandpass Filter with High Frequency Selecti...

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IEEE International Wireless Symposium (IWS)

作者： Jiancheng Dong Xu Zhu Tao Yang Yi Nie Yong Wang Nanhu Laboratory Research Center of Advanced RF Chips and Systems Jiaxing China Laboratory of Electromagnetic Space Cognition and Intelligent Control Technology Beijing China University of Electronic Science and Technology of China Chengdu China

In this paper, an on-chip wideband bandpass filter (BPF) with high frequency selectivity and low insertion loss is proposed using gallium arsenide (GaAs) integrated passive device (IPD) technology. Multiple transmission zeros can be provided by the capacitors loaded on the series and parallel LC resonators for the proposed design. Comparing with the state-of-the-art on-chip wideband BPFs, the proposed design has the advantages of high frequency selectivity and low loss. The final filter centered at 1.93 GHz with the 3-dB fractional bandwidth of 64.2% is demonstrated, which exhibits the excellent shape factor (30-dB BW/3-dB BW) of 1.28 and the minimum insertion loss of 1.17 dB.

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A PREA and OODA Computing Framework of Unmanned systems to Perform Complex Tasks

IEEE Transactions on Intelligent Vehicles

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IEEE Transactions on Intelligent Vehicles 2024年 1-18页

作者： Yang, Dongsheng Yu, Lei Zhang, Yi Zhu, Fenghua Li, Qiang Cui, Huachao Ma, Qiongmin Fan, Lili Tian, Yonglin Jinan University Guangzhou China Intelligent Science & Technology Academy Limited of CASIC Beijing China State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of Automation Chinese Academy of Sciences Beijing China State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China 28th Research Institute of China Electronics Technology Group Corporation Nanjing China National Key Laboratory for Complex Systems Simulation National University of Defense Technology Changsha China School of Information and Electronics Beijing Institute of Technology Beijing China

A C2 computing framework for unmanned systems to perform complex tasks is proposed using methods of system of systems engineering, which is formed by combining the macro-scale command and control (C2) process mechanism model (PREA loop) and micro-scale C2 process mechanism model (OODA loop). Guided by PREA loop and OODA loop, the computing framework is divided into four steps and three kinds of transformations. The four steps are design, construction, operation monitoring, and assessment. The three transformations are tactical feedback, campaign feedback, and strategic feedback. A C2 organization model of joint landing combat force is established against the background of a typical complex task of joint landing operation, and the C2 computing framework based on the PREA &OODA is used to implement the C2 activities of the joint landing combat force. The influence of the computing framework on the performance of unmanned systems under different task conditions is verified, including task coordination load, task efficiency and sensitivity of unmanned systems response. Authors

关键词： Feedback

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Perseverance Rover Robotic Arm and Turret Mounted Instruments Surface Commissioning

Perseverance Rover Robotic Arm and Turret Mounted Instrument...

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2022 IEEE Aerospace Conference, AERO 2022

作者： Bailey, Philip Klein, Douglas Zorn, Torsten Srinivasan, Thirupathi Schaler, Ethan W. Brooks, Sawyer Beegle, Luther Dolci, Marco Hernandez, Christina Sondheim, Michael Kennedy, Megan R. Edgett, Kenneth S. California Institute of Technology Jet Propulsion Laboratory 4800 Oak Grove Dr. PasadenaCA91109 United States Malin Space Science Systems PO Box 910148 San DiegoCA92121 United States

ISBN: (数字)9781665437608

ISBN: (纸本)9781665437608

The Robotic Arm (RA) on the Perseverance rover is an integral component of the Sampling and Caching System necessary for completing the science goals of the Mars 2020 mission. While the Perseverance rover was based on the Curiosity rover which landed in 2012, the Robotic Arm was redesigned to carry a much larger turret with a new suite of payloads. Shortly after Perseverance landed in Jezero Crater, a series of checkouts was completed with the RA during the first 100 sols (Martian solar days) of the mission in order to ensure proper functionality of the RA and the instruments mounted on the turret. This period of time in the mission was called Surface Operations Transition (SOX). The objective of SOX was to systematically execute checkout activities for all the basic functionality so that the RA and instruments, as well as other rover components, could be released for scientific exploration. RA activities during SOX can be divided into four different categories: Mechanism Checkouts, Rover Visual Inspections, Performance Characterization, and Instrument Functional Checkouts. Many of these checkouts built off of each other such that each subsequent activity would verify incrementally complex functionality. Many of the defined activities were executed several times throughout the development of the rover and served as a verification that the RA's performance is consistent with testing on Earth. Other activities were developed uniquely for SOX to respond to challenges discovered during development. They were designed to be verifiable without the help of ground support equipment or previous executions on the flight hardware to compare against. This paper discusses the formulation and conception of the various RA SOX checkout activities, verification and testing required to certify them for flight, execution of the activities on Mars, issues encountered, and finally results and findings as the mission transitioned to nominal science operations. We will be presenting the r

关键词： Robotic arms

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Design and fabrication of a full elastic sub-micron-Newton scale thrust measurement system for plasma micro thrusters

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Plasma science and technology 2021年第10期23卷 29-39页

作者： Zhongkai Zhang Guanrong Hang Jiayun Qi Zun Zhang Zhe Zhang Jiubin Liu Wenjiang Yang Haibin Tang School of Space and Environment Beihang UniversityBeijing 100191People's Republic of China Shanghai Institute of Space Propulsion Shanghai Engineering Research Center of Space EngineShanghai 201112People's Republic of China School of Astronautics Beihang UniversityBeijing 100191People's Republic of China The Institute of Space Systems University of StuttgartStuttgart D-70569GermanyBeijing 100083People's Republic of China Key Laboratory of Spacecraft Design Optimization&Dynamic Simulation Technologies Ministry of EducationBeijing 100083People's Republic of China Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100083People’s Republic of China

In this work,a force measurement system is proposed to measure the thrust of plasma microthruster with thrust magnitude ranging from sub-micro-Newtons to hundreds *** thrust measurement system uses an elastic torsional pendulum structure with a capacitance sensor to measure the displacement,which can reflect the position change caused by the applied force perpendicular to the pendulum *** the open-loop mode,the steady-state thrust or the impulse of the plasma micro-thruster can be obtained from the swing of the pendulum,and in the closed-loop mode the steady-state thrust can be obtained from the feedback force that keeps the pendulum at a specific *** thrust respond of the system was calibrated using an electrostatic weak force generation *** results show that the system can measure a thrust range from 0 to 200μN in both open-loop mode and closed-loop mode with a thrust resolution of 0.1μN,and the system can response to a pulse bit at the magnitude of 0.1 m N s generated by a micro cathode arc *** background noise of the closed-loop mode is lower than that of the open-loop mode,both less than 0.1 m N/Hz in the range of 10 mHz to 5 Hz.

关键词： plasma thruster micro-thrust measurement torsional pendulum

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Intensive Tasks Offloading Decision Algorithms in Satellite Edge Computing systems

Intensive Tasks Offloading Decision Algorithms in Satellite ...

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International Conference on Optical Communications and Networks (ICOCN)

作者： Yanxiang Wang Furong Chai Qi Zhang Yuanfeng Li Meng Sun Dandan Sun Feng Tian Fu Wang Yongjun Wang Qinghua Tian Leijing Yang School of Electronic Engineering Beijing University of Posts and Telecommunications (BUPT) Beijing China Beijing Key Laboratory of Space-ground Interconnection and Convergence BUPT Beijing China Science and Technology on Information Systems Engineering Laboratory National Univ. of Defense Technology Changsha China

To address the offloading allocation problem for intensive tasks in Satellite Edge Computing (SEC) systems, a Sequence-to-Sequence (Seq2Seq) and Deep Reinforcement Learning (DRL) based decision generation algorithm, e... 详细信息

ISBN: (数字)9798350367652

ISBN: (纸本)9798350367669

关键词： Satellites Deep reinforcement learning Optical fiber communication Resource management Task analysis Edge computing

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Unraveling adaptive changes in electric vehicle charging behavior toward the postpandemic era by federated meta-learning

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The Innovation 2024年第2期5卷 21-23页

作者： Linlin You Rui Zhu Mei-Po Kwan Min Chen Fan Zhang Bisheng Yang Man Sing Wong Zheng Qin School of Intelligent Systems Engineering Sun Yat-Sen UniversityShenzhen 518107China Institute of High Performance Computing(IHPC) Agency for ScienceTechnology and Research(A*STAR)1 Fusionopolis WaySingapore 138632Republic of Singapore Institute of Space and Earth Information Science Chinese University of Hong KongHong KongChina Key Laboratory of Virtual Geographic Environment(Ministry of Education) Nanjing Normal UniversityNanjing 210023China Institute of Remote Sensing and Geographical Information System School of Earth and Space SciencesPeking UniversityBeijing 100871China State Key Laboratory of Information Engineering in Surveying Mappingand Remote SensingWuhan UniversityWuhan 430079China Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityHong KongChina

Dear Editor,Electric vehicle(EV)sales have significantly grown over the years to fulfill growing demands for economic travel and greenhouse gas mitigation.1 However,the surge in the number of EVs has led to charging anxiety as users struggle to find an available charging station before running out of electricity,resulting in longer reserve and waiting times.2 Moreover,severe mobility restrictions caused by infectious diseases,such as coronavirus disease 2019(COVID-19),have greatly affected people’s travel behavior3,4 and hindered their willingness to use EVs,given that charging in public spaces consumes time and increases the risk of contracting the virus.5 This implies that in the postpandemic era,in which individuals coexist with the virus,the interplay between the two important trends,namely vehicle electrification and mobility restrictions,can extensively affect people’s daily commuting by using EVs.

关键词： travel behavior charging

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Advances in subsea carbon dioxide utilization and storage

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Energy Reviews 2023年第1期2卷 61-80页

作者： Jiashun Luo Yachen Xie Michael Z.Hou Ying Xiong Xunning Wu Christian Truitt Lüddeke Liangchao Huang Institute of Subsurface Energy Systems Clausthal University of Technology38678Clausthal-ZellerfeldGermany State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of ScienceWuhan430071China School of Earth&Space Sciences Peking UniversityBeijing100871China Sino-German Research Institute of Carbon Neutralization and Green Development Zhengzhou UniversityZhengzhou450001China

Decisive steps in innovation and competitiveness are needed to meet global greenhouse gas emissions and climate *** an effective method for reducing carbon emissions,carbon dioxide(CO_(2))storage and utilization on the seabed enable the transport of captured CO_(2)via pipelines or ships to permanent storage sites,such as saline aquifers or depleted oil and gas reservoirs in subsea sediments,or by injecting CO_(2)for the replacement and displacement of subsea resources(oil,gas,gas hydrates,etc.).Subsea CO_(2)utilization and storage(SCUS)involves several research hotspots worldwide,including international and local laws and regulations,security,economics,environmental impact,and public *** current research and engineering progress are also of great *** addition,the vigorous implementation of the energy transition and the rapid development of renewable energy sources globally have resulted in significant advancements in *** paper provides an overview of carbon dioxide storage and utilization mechanism in the seabed,analyzes key technical and economic issues,and summarizes existing research on safety risks,monitoring technologies,and investment and operating cost control to identify remaining knowledge *** is followed by an overview of global engineering practice to update on current ***,combined with the actualities of China,the potential and trend of China's seabed carbon storage and utilization are *** review demonstrates the enormous development prospects for seabed carbon storage and utilization,although some risks remain including leakage and contamination,with which innovation in monitoring technologies and the self-sealing effect of gas hydrate,safe subsea utilization and storage of CO_(2)can be ***,considering the development of renewable energy and the demand for large-scale energy storage,hydrogen,ammonia,or other energy carriers and carbon dioxide storage and utilization can be co

关键词： Subsea CO_(2)storage and utilization CO_(2)hydrate Economic evaluation Technical challenges

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The Analysis and Compensation of Elastic Unbalance Torque of the Three-axis Air-bearing Simulator 5

The Analysis and Compensation of Elastic Unbalance Torque of...

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2021 5th International Conference on Electrical, Automation and Mechanical Engineering, EAME 2021

作者： Li, Zhanxin Cao, Zizhen Duan, Wenjie Du, Yikang Liu, Haiteng Tianjin Institute of Aerospace Mechanical and Electrical Equipment Tianjin China Tianjin Key Laboratory of Microgravity Environment Simulation Technology Tianjin China Beijing Institute of Control Engineering Beijing China Science and Technology on Space Intelligent Control Laboratory Beijing China

The most important interfering torque of a three-axis air-bearing simulator is the displacement of the center of mass in the gravity field caused by structural elasticity. In order to characterize the torque, a mathematical model of the interference moment was established. Based on the model, it is suggested that the vertical stiffness and horizontal stiffness of the structure should be equal as far as possible during the structural design, and the elastic unbalance moment can be compensated by the vertical offset of the center of mass of the air floating platform relative to the rotation center after the initial attitude leveling. ABAQUS was used to build a simulation model of the air floating platform, and the changes of the structure's centroid before and after the gravitational field was applied were extracted by software to simulate the centroid deviation caused by the elastic deformation of the structure, which was used as the characterization to conduct discrete optimization of the structure. The optimal structural parameters were obtained. Then the disturbance torque curve and the corresponding initial centroid offset after initial centroid compensation were calculated by mathematical model. The results are of positive guiding significance to the design of three-axis air-bearing simulator. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Torque

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