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Stable wide-temperature and low volume expansion Al batteries:Integrating few-layer graphene with multifunctional cobalt boride nanocluster as positive electrode

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Nano research 2020年第2期13卷 419-429页

作者： Li-Li Chen Na Li Huifeng Shi Yuefei Zhang Wei-Li Song Shuqiang Jiao Haosen Chen Daining Fang institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China School of Materials Science&Engineering Beijing Institute of TechnologBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China institute of Microstructure and Property of Advarced Materials Beijing University of TechnologyBejing 100124China State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking UniversityBeijing 100871China

To achieve stable positive electrode for promoting the overall electrochemical performance of Al batteries(ABs),here novel cobalt boride(CoB)nanoclusters are synthesized to construct composite electrodes with few-layer graphene(FLG).Due to the presence of amorphous channels in the employed CoB nanoclusters,the ABs with FLG/CoB composite positive electrodes exhibit high *** and both mechanical and electrochemical stability in the *** assistance of in situ scanning electron microscopy(SEM),the observation results suggest that the positive electrode of CoB nanoclusters holds almost ignorable volume variation upon electrochemical processes,which substantially alleviates the massive electrode expansion induced by the anion intercalation in the composite positive ***,the composite positive electrodes provide stable reversible energy storage capability within a broadened temperature range(-30-60℃),promising a novel strategy to design advanced ABs positive electrodes with enhanced overall energy storage performance.

关键词： Al batteries positive electrode cobalt boride nanoclusters ionic liquid broad temperature

design and Control for WLR-3P:A Hydraulic Wheel-Legged Robot

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Cyborg and Bionic Systems 2023年第1期4卷 243-259页

作者： Xu Li Haoyang Yu Haibo Feng Songyuan Zhang Yili Fu State Key Laboratory of Robotics and System College of Mechatronics EngineeringHarbin Institute of TechnologyHarbin 150001China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Intelligent Robot research Center Zhejiang LaboratoryHangzhou 311100China

The robot used for disaster rescue or field exploration requires the ability of fast moving on flat road and adaptability on complex *** hybrid wheel-legged robot(WLR-3P,prototype of the third-generation hydraulic wheel-legged robot)has the characteristics of fast and efficient mobility on flat surfaces and high environmental adaptability on rough *** this paper,3 design requirements are proposed to improve the mobility and environmental adaptability of the *** meet these 3 requirements,2 design principles for each requirement are put ***,for light weight and low inertia with high stiffness,3-dimensional printing technology and lightweight material are ***,the integrated hydraulically driven unit is used for high power density and fast response ***,the microhydraulic power unit achieves power autonomy,adopting the hoseless design to strengthen the reliability of the hydraulic *** is more,the control system including hierarchical distributed electrical system and control strategy is *** mobility and adaptability of WLR-3P are demonstrated with a series of ***,the robot can achieve a speed of 13.6 km/h and a jumping height of 0.2 m.

关键词： robot Robot terrain

Tribotronic triggers and sequential logic circuits

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Nano research 2017年第10期10卷 3534-3542页

作者： Li Min Zhang Zhi Wei Yang Yao Kun Pang Tao Zhou Chi Zhang Zhong Lin Wang Beijing institute of Nanoenergy and Nanosystems Chinese Academy of Sciences National Center for Nanoscience and Technology Beijing 100083 China School of Material Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0245 USA

In this paper, a floating-gate tribotronic transistor （FGTT） based on a mobile triboelectric layer and a traditional silicon-based field-effect transistor （FET） is proposed. In the FGTT, the triboelectric charges in the layer created by contact electrification can be used to modulate charge carrier transport in the transistor. Based on the FGTTs and FETs, a tribotronic negated AND （NAND） gate that achieves mechanical-electrical coupled inputs, logic operations, and electrical level outputs is fabricated. By further integrating tribotronic NAND gates with traditional digital circuits, several basic units such as the tribotronic S-R trigger, D trigger, and T trigger have been demonstrated. Additionally, tribotronic sequential logic circuits such as registers and counters have also been integrated to enable external contact triggered storage and computation. In contrast to the conventional sequential logic units controlled by electrical signals, contact-triggered tribotronic sequential logic circuits are able to realize direct interaction and integration with the external environment. This development can lead to their potential application in micro/nano-sensors, electromechanical storage, interactive control, and intelligent instrumentation.

关键词： tribotronics tribotronic transistor triboelectric nanogenerator trigger sequential logic circuits

基于自解耦三明治结构的横向运动栅场效应晶体管MEMS微力传感器

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Engineering 2023年第2期21卷 61-74,M0004页

作者：高文迪乔智霞韩香广王小章 Adnan Shakoor 刘存朗卢德江杨萍赵立波王永录王久洪蒋庄德孙东 State Key Laboratory for Manufacturing Systems Engineering International Joint Laboratory for Micro/Nano Manufacturing and Measurement TechnologiesOverseas Expertise Introduction Center for Micro/Nano Manufacturing and Nano Measurement Technologies Discipline InnovationXi’an Jiaotong University(Yantai)Research Institute for Intelligent Sensing Technology and SystemSchool of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai 265503China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Robotics and Systems Harbin Institute of TechnologyHarbin 150006China Eleventh research institute Sixth Academy of China Aerospace Science and Technology Co.Xi’an 710100China Department of Control and Instrumentation Engineering King Fahd University of Petroleum and MineralsDhahran 31261Saudi Arabia Department of Biomedical Engineering City University of Hong KongHong Kong 999077China

本文介绍了一种基于横向可移动栅极场效应晶体管(LMGFET)的新型微型力传感器的开发。提出了一种精确的电气模型,用于小型LMGFET器件的性能评估,与以前的模型相比,其精度有所提高。采用了一种新型三明治结构,该结构由一个金交叉解耦栅阵... 详细信息

本文介绍了一种基于横向可移动栅极场效应晶体管(LMGFET)的新型微型力传感器的开发。提出了一种精确的电气模型,用于小型LMGFET器件的性能评估,与以前的模型相比,其精度有所提高。采用了一种新型三明治结构,该结构由一个金交叉解耦栅阵列层和两个软光阻层SU-8组成。通过所提出的双差分传感结构,LMGFET横向工作在垂直干扰下的输出电流被大大消除,所提出传感器的相对输出误差从4.53%(传统差分结构)降低到0.01%。提出了一种实用的传感器制造工艺,并对其进行了模拟。基于LMGFET的力传感器的灵敏度为4.65μA·nN^(-1),可与垂直可移动栅极场效应晶体管(VMGFET)器件相媲美,但非线性度提高了0.78%,测量范围扩大了±5.10μN。这些分析为LMGFET器件的电气和结构参数提供了全面的设计优化,并证明了所提出的传感器在生物医学显微操作应用中具有良好的力传感潜力。

关键词：力传感器场效应晶体管横向运动三明治结构电气模型显微操作非线性度双差分

Effect of Annealing Time on the Dielectric Properties of BaMn3Ti4O14.25Pellets by Spark Plasma Sintering

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Journal of Applied Mathematics and Physics 2019年第8期7卷 1637-1644页

作者： Xiong Xie Jun Shen Xinxin Liu Liang Wang State Key Laboratory of mechanical Transmission College of Materials science and engineering Chongqing University Chongqing China Chongqing institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China

In this paper, the effects of annealing time on the dielectric properties of the Spark Plasma Sintered (SPS) BaMn3Ti4O14.25 pellets were detail studied by the crystal structure analysis, micro structural observation and electrical properties research. The results showed that long annealing time was beneficial to the recovery of crystal structure damage caused by SPS, the formation of a reoxidation layer at the surface of grains and decreasing of the electrically insulating phase. All of these resulted in an increase in dielectric constant and loss, and a reduction in breakdown voltage.

关键词： BaMn3Ti4O14.25 Dielectric Properties Reoxidation Layer electrically Insulating Phase Breakdown Voltage

Tracking Control design for Nonholonomic mechanical Systems with Affine Constraints

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International Journal of Automation and computing 2014年第3期11卷 328-333页

作者： Wei Sun Yu-Qiang Wu Zong-Yao Sun School of Automation Southeast University institute of Automation Qufu Normal University

The trajectory tracking control is considered for nonholonomic mechanical systems with affine constraints and dynamic friction. A new state transformation is proposed to deal with affine constraints, and then an integral feedback compensation strategy is used to identify the dynamic friction. The proposed controller ensures that the output tracking errors converge to zero as t →∞.As an application, a detailed example is presented to illustrate the effectiveness of the control scheme.

关键词： Tracking control nonholonomic systems affine constraints constraint forces integral feedback compensation

design of a Minimally Actuated Lower Limb Exoskeleton with mechanical Joint Coupling

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Journal of Bionic Engineering 2022年第2期19卷 370-389页

作者： Hui Li Hongliu Yu Yingwei Chen Xinyi Tang Duojin Wang Qiaoling Meng Qing Du institute of Rehabilitation Engineering and Technology University of Shanghai for Science and TechnologyShanghai 200093China Shanghai Engineering research Center of Assistive Devices institute of Rehabilitation Engineering and Technology Shanghai 200093China Key Laboratory of Neural-Functional Information and Rehabilitation Engineering of the Ministry of Civil Affairs Shanghai 200093China Department of Gastroenterology Xinhua Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200092China Department of Rehabilitation Medicine Xinhua Hospital Affiliated to Shanghai Jiaotong University School of MedicineShanghai 200092China

Powered lower limb exoskeletons have traditionally used four or more powered joints to provide ambulation assistance for individuals with spinal cord *** with numerous powered joints commonly lost some excellent features of passive orthoses and further decreased utility due to added weight and increased control *** work adopts joints coupling mechanism to design a powered exoskeleton to minimize the number of actuated joints and control *** conventional powered exoskeletons,the joint-coupled-powered exoskeleton only has a single motor-actuated joint for each exoskeleton leg in conjunction with a unique knee coupled system to enable their users to walk,sit,and *** two types of joint coupled systems are designed,respectively,hip-knee coupled and knee-ankle *** joint-coupled-powered exoskeleton system allows a single actuator to power the hip motion,and allows activate knee motion through the coupled motions of the hip or *** specifically,when the mechanical coupled system is activated,the knee joint is unlocked,resulting in synchronized hip-knee or ankle-knee flexion and *** coupling mechanism is switched on and off at specific phases of the gait(the stance phase and the swing phase)to generate the desired *** research work proves that minimal actuated robotic systems with joint coupled could achieve safe and natural walking.

关键词： Powered exoskeleton Minimal actuation Joint coupling Single motor-actuated joint

Ka-Band metalens antenna empowered by physics-assisted particle swarm optimization(PA-PSO)algorithm

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Opto-Electronic Science 2024年第10期3卷 23-33页

作者： Shibin Jiang Wenjun Deng Zhanshan Wang Xinbin Cheng Din Ping Tsai Yuzhi Shi Weiming Zhu School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610051China institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China Department of electrical Engineering City University of Hong KongHong Kong 999077China.

design of multiple-feed lens antennas requires multivariate and multi-objective optimization processes,which can be accelerated by PSO ***,the PSO algorithm often fails to achieve optimal results with limited computation resources since spaces of candidate solutions are quite large for lens antenna *** paper presents a design paradigm for multiple-feed lens antennas based on a physics-assisted particle swarm optimization(PA-PSO)algorithm,which guides the swarm of particles based on laws of *** a proof of concept,a design of compact metalens antenna is proposed,which measures unprecedented performances,such as a field of view at±55°,a 21.7 dBi gain with a flatness within 4 dB,a 3-dB bandwidth>12°,and a compact design with a f-number of *** proposed PA-PSO algorithm reaches the optimal results 6 times faster than the ordinary PSO algorithm,which endows promising applications in the multivariate and multi-objective optimization processes,including but not limited to metalens antenna designs.

关键词： multiple-feed lens antennas PA-PSO algorithm metalens metasurfaces Ka-band antenna

Pressureless crystallization of glass toward scintillating composite with high crystallinity for radiation detection

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Journal of Materials Science & Technology 2022年第34期129卷 173-180页

作者： Junzhou Tang Shichao Lv Ziyu Lin Guanxin Du Manyun Tang Xu Feng Junpeng Guo Xiang Li Junfeng Chen Lei Wei Jianrong Qiu Shifeng Zhou State Key Laboratory of Luminescent Materials and Devices School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510640China Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesGuangzhou 510640China Shanghai Hapstar M&E Equipment Co. Ltd.Shanghai 201109China Shanghai institute of Ceramics Chinese Academy of SciencesShanghai 201800China School of electrical and Electronic Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore College of Optical Science and Engineering State Key Laboratory of Modern Optical InstrumentationZhejiang UniversityHangzhou 310027China

The construction of scintillating ceramics is of great technological importance for various fundamental applications, including medical diagnostic, security inspection, resource exploration and particle physics. The chief challenge is the facile and scalable synthesis of scintillating ceramics with the desirable combination of pore-free, reliable mechanical properties and excellent scintillating performance. Here we present a pressureless glass crystallization strategy for the construction of scintillating composite with high crystallinity. The fabricated scintillating composites are featured by small optical turbidity, excellent mechanical properties, and efficient scintillating luminescence with the scintillating light yield of 15,000 pH/MeV and about 2.46 times higher than that of the commercial BGO single crystal. Moreover, the scintillating composite derived radiation detector device is successfully elaborated. The practical application for monitoring gamma ray is demonstrated and the precision of the device is less than that of the tolerable deviation of 30%. Our results suggest an innovative approach for expanding the category of scintillating material candidates, pointing to practical application in the field of radiation detection.

关键词： Glass Glass crystallization Optical materials Composite Luminescence