检索结果-内蒙古大学图书馆

I3−/I−Redox Reaction-mediated Organic Zinc-Air Batteries with Accelerated Kinetics and Long Shelf Lives

Angewandte Chemie 2023年第26期135卷

作者： Mangwei Cui Ninggui Ma Hao Lei Youfa Liu Wei Ling Sheng Chen Jiaqi Wang Prof. Hongfei Li Zhaohui Li Prof. Jun Fan Prof. Yan Huang State Key Laboratory of Advanced Welding and Joining Sauvage Laboratory for Smart Materials Shenzhen Key Laboratory of Flexible Printed Electronics Technology School of Materials Science and Engineering Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China Department of Materials Science and Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong 999077 China Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China School of System Design and Intelligent Manufacturing Southern University of Science and Technology Shenzhen 518055 China Songshan Lake Materials Laboratory Dongguan 523808 China Shenzhen China Star Optoelectronic Semiconductor Display Technology Co. Ltd. Shenzhen 518055 China

The storage time of Zn-air batteries (ZABs) for practical implementation have been neglected long-lastingly. ZABs based on organic solvents promise long shelf lives but suffer from sluggish kinetics. Here, we report a longly storable ZAB with accelerated kinetics mediated by I 3 − /I − redox. In the charge process, the electrooxidation of Zn 5 (OH) 8 Cl 2 ⋅H 2 O is accelerated by I 3 − chemical oxidation. In the discharge process, I − adsorbed on the electrocatalyst changes the energy level of oxygen reduction reaction (ORR). Benefitting from these advantages, the prepared ZAB shows remarkably improved round-trip efficiency (56.03 % vs. 30.97 % without the mediator), and long-term cycling time (>2600 h) in ambient air without replacing any components or applying any protective treatment to Zn anode and electrocatalyst. After resting for 30 days without any protection, it can still directly discharge continuously for 32.5 h and charge/discharge very stably for 2200 h (440 cycles), which is evidently superior to aqueous ZABs (only 0/0.25 h, and 50/25 h (10/5 cycles) by mild/alkaline electrolyte replenishment). This study provides a strategy to solve both storage and sluggish kinetics issues that have been plaguing ZABs for centuries, opening up a new avenue to the industrial application of ZABs.

关键词： Iodine-Containing Reaction Kinetics Redox Mediators Storage Time Zn-Air Batteries

来源：评论

学校读者我要写书评

暂无评论

A Bio-Signal Enhanced Adaptive Impedance Controller for Lower Limb Exoskeleton

A Bio-Signal Enhanced Adaptive Impedance Controller for Lowe...

引用

IEEE International Conference on robotics and Automation (ICRA)

作者： Linqing Xia Yachun Feng Fan Chen Xinyu Wu Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Guangdong China University of Chinese Academy of Sciences Beijing China Shenzhen Institute of Artificial Intelligence and Robotics for Society SIAT Branch Guangdong China

ISBN: (数字)9781728173955

ISBN: (纸本)9781728173962

The problem of human-exoskeleton interaction with uncertain dynamical parameters remains an open-ended research area. It requires an elaborate control strategy design of the exoskeleton to accommodate complex and unpredictable human body movements. In this paper, we proposed a novel control approach for the lower limb exoskeleton to realize its task of assisting the human operator walking. The main challenge of this study was to determine the human lower extremity dynamics, such as the joint torque. For this purpose, we developed a neural network-based torque estimation method. It can predict the joint torques of humans with surface electromyogram signals (sEMG). Then an radial basis function neural network (RBF NN) enhanced adaptive impedance controller is employed to ensure exoskeleton track desired motion trajectory of a human operator. Algorithm performance is evaluated with two healthy subjects and the rehabilitation lower-limb exoskeleton developed by Shenzhen institutes of advanced technology (SIAT).

关键词： Exoskeletons Torque Estimation Muscles Impedance Artificial neural networks Legged locomotion

来源：评论

学校读者我要写书评

暂无评论

A DRL-based framework for self-balancing exoskeleton walking

A DRL-based framework for self-balancing exoskeleton walking

引用

IEEE International Conference on Real-time Computing and robotics (RCAR)

作者： Yao Dong Yong He Xinyu Wu Guangju Gao Wei Feng A Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China SIAT Branch Shenzhen Institute of Artificial Intelligence and Robotics for Society Shenzhen College of Advanced Technology University of Chinese Academy of Sciences Shenzhen China CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China

ISBN: (数字)9781728172934

ISBN: (纸本)9781728172941

Self-balancing exoskeleton is a robot that can be worn by paraplegic patients for walking without external support. The exoskeleton is similar to humanoid robot with two normal human feet, which cause inconvenience to existing control methods. These model-based methods require mathematical modeling and usually do not consider the impact of the controller like limits of position and torque. This paper proposes a deep reinforce learning (DRL) based training framework for self-balancing exoskeleton, for the purpose of learning a feasible walking policy which can generate walk pattern similar to the given reference motion for paraplegia with exoskeleton. The framework is based on policy gradient descent algorithm, and a way to simplify the model is proposed to speed up model training. The experimental results indicate that this training framework which fully considers the controller can acquire a feasible control policy for self-balancing exoskeleton.

关键词： Cows Robots Real-time systems Conferences

来源：评论

学校读者我要写书评

暂无评论

End-to-End 3D Point Cloud Learning for Registration Task Using Virtual Correspondences

End-to-End 3D Point Cloud Learning for Registration Task Usi...

引用

2020 IEEE/RSJ International Conference on intelligent Robots and systems (IROS)

作者： Huanshu Wei Zhijian Qiao Zhe Liu Chuanzhe Suo Peng Yin Yueling Shen Haoang Li Hesheng Wang The Chinese University of Hong Kong T Stone Robotics Institute Hong Kong Shanghai Jiao Tong University China University of Cambridge United Kingdom Carnegie Mellon University Insititue of Medical Robotics Key Laboratory of System Control and Information Processing of Ministry of Education Key Laboratory of Marine Intelligent Equipment and System of Ministry of Education Shanghai Jiao Tong University Shanghai China Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing Institute of Technology China

ISBN: (数字)9781728162126

ISBN: (纸本)9781728162133

3D Point cloud registration is still a very challenging topic due to the difficulty in finding the rigid transformation between two point clouds with partial correspondences, and it's even harder in the absence of any initial estimation information. In this paper, we present an end-to-end deep-learning based approach to resolve the point cloud registration problem. Firstly, the revised LPD-Net is introduced to extract features and aggregate them with the graph network. Secondly, the self-attention mechanism is utilized to enhance the structure information in the point cloud and the cross-attention mechanism is designed to enhance the corresponding information between the two input point clouds. Based on which, the virtual corresponding points can be generated by a soft pointer based method, and finally, the point cloud registration problem can be solved by implementing the SVD method. Comparison results in ModelNet40 dataset validate that the proposed approach reaches the state-of-the-art in point cloud registration tasks and experiment resutls in KITTI dataset validate the effectiveness of the proposed approach in real applications.

关键词： Three-dimensional displays Aggregates Pose estimation Feature extraction Task analysis intelligent robots

来源：评论

学校读者我要写书评

暂无评论

Chaos generation by a hybrid integrated chaotic semiconductor laser

引用

Chinese Physics B 2018年第5期27卷 122-130页

作者： Ming-Jiang Zhang Ya-Nan Niu Tong Zhao Jian-Zhong Zhang Yi Liu Yu-Hang Xu Jie Meng Yun-Cai Wang An-Bang Wang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan University of TechnologyTaiyuan 030024China Institute of Optoelectronic Engineering College of Physics&OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024China

We design a hybrid integrated chaotic semiconductor laser with short-cavity optical *** can be assembled in a commercial butterfly shell with just three *** of them is coated by a transflective film to provide the optical feedback for chaos generation while insuring regular laser *** prove the feasibility of the chaos generation in this compact structure and provide critical external parameters for the fabrication by theoretical *** than the usual changeless internal parameters used in previous simulation research,we extract the real parameters of the chip by ***,the maps of the largest Lyapunov exponent with varying bias current and feedback intensity Kap demonstrate the dynamic characteristics under different external-cavity *** laser chip has its own optimal external cavity length(L)and feedback intensity(Kap)to generate chaos because of the different internal *** have acquired two ranges of optimal parameters(L=4 mm,0.12〈Kap〈0.2 and L=5 mm,0.07〈Kap〈0.12)for two different chips.

关键词： chaotic dynamic characteristics integrated chaotic semiconductor laser short-cavity optical feedback extraction of internal parameters

来源：评论

学校读者我要写书评

暂无评论

Stable Self-Charged Perovskite Quantum Rods for Liquid Laser with Near-Zero Threshold

arXiv

引用

arXiv 2025年

作者： Li, Jialu Han, Xue Wang, Wenjie Wang, Jinhui Zhang, Tingting Wu, Yuting Zhang, Guofeng Li, Bin Yang, Changgang Guo, Wenli Zhang, Mi Chen, Ruiyun Qin, Chengbing Hu, Jianyong Yang, Zhichun Liu, Shaoding Wang, Yue Gao, Yunan Ma, Jie Xiao, Liantuan Jia, Suotang State Key Laboratory of Quantum Optics Technologies and Devices Institute of Laser Spectroscopy Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan030006 China Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education Taiyuan University of Technology 79 Yingze Street Taiyuan030024 China School of Microelectronics College of Materials Science and Engineering Nanjing University of Science and Technology Nanjing210094 China State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of Physics Peking University Beijing100871 China

Colloidal quantum dots (QDs) are promising optical gain materials that require further threshold reduction to realize their full potential. While QD charging theoretically reduces the threshold to zero, its effectiveness has been limited by strong Auger recombination and unstable charging. Here we theoretically reveal the optimal combination of charging number and Auger recombination to minimize the lasing threshold. Experimentally, we develop stable self-charged perovskite quantum rods (QRs) as an alternative to QDs via state engineering and Mn-doping strategy. An unprecedented two-order-of-magnitude reduction in nonradiative Auger recombination enables QRs to support a sufficient charging number of up to 6. The QR liquid lasing is then achieved with a near-zero threshold of 0.098 using quasi-continuous pumping of nanosecond pulses, which is the lowest threshold among all reported QD lasers. These achievements demonstrate the potential of the specially engineered QRs as an excellent gain media and pave the way for their prospective applications. Copyright © 2025, The Authors. All rights reserved.

关键词： Optical pumping

来源：评论

学校读者我要写书评

暂无评论

Finite Element Analysis of Series Elastic Actuator for Exoskeleton Robot Joint

Finite Element Analysis of Series Elastic Actuator for Exosk...

引用

IEEE International Conference on Mechatronics and Automation

作者： Pengyu Xi Weimin Ge Sen Zhang Zhili Zhang Teresa Zielinska Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical Engineering Tianjin University of Technology Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin University of Technology Intelligent Manufacturing College Tianjin Sino-German University of Applied Science Tianjin China Institute of Aeronautics and Applied Mechanics Warsaw University of Technology Warsaw Poland

ISBN: (数字)9781728164168

ISBN: (纸本)9781728164175

The finite element simulation for the joints of an exoskeleton robot is conducted in this paper. Using software OpenSim to simulate the normal walking gait of the human body, the motion angle and moment of the human hip, knee and ankle joints are obtained. Using the obtained data as the input parameters in the finite element simulation of the simulation software Ls-dyna, the strain diagrams and contact force curves of the circular roller and cam disk were obtained. In this study, three commonly used materials are selected: alloy steel, ductile iron and hard aluminum alloy. Finally, the effects of different materials on the key components of the series elastic actuator are studied.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Reviewing continual learning from the perspective of human-level intelligence

arXiv

引用

arXiv 2021年

作者： Chang, Yifan Li, Wenbo Peng, Jian Tang, Bo Kang, Yu Lei, Yinjie Gui, Yuanmiao Zhu, Qing Liu, Yu Li, Haifeng The State Key Laboratory of Fire Science Department of Automation and Institute of Advanced Technology University of Science and Technology of China Hefei China Institute of Intelligent Machines Chinese Academy of Sciences Hefei230031 China The Department of Electrical and Computer Engineering Mississippi State University United States College of Electronics and Information Engineering Sichuan University Chengdu China Faculty of Geosciences and Environmental Engineering The Southwest Jiaotong University Chengdu China Institute of Remote Sensing and Geographic Information System Peking Universit Beijing China School of Geosciences and Info-Physics Central South University South Lushan Road Changsha410083 China

Humans continual learning (CL) ability is closely related to Stability Versus Plasticity Dilemma that describes how humans achieve ongoing learning capacity and preservation for learned information. The notion of CL has always been present in artificial intelligence (AI) since its births. This paper proposes a comprehensive review of CL. Different from previous reviews that mainly focus on the catastrophic forgetting phenomenon in CL, this paper surveys CL from a more macroscopic perspective based on the Stability Versus Plasticity mechanism. Analogous to biological counterpart, "smart" AI agents are supposed to i) remember previously learned information (information retrospection);ii) infer on new information continuously (information prospection:);iii) transfer useful information (information transfer), to achieve high-level CL. According to the taxonomy, evaluation metrics, algorithms, applications as well as some open issues are then introduced. Our main contributions concern i) rechecking CL from the level of artificial general intelligence;ii) providing a detailed and extensive overview on CL topics;iii) presenting some novel ideas on the potential development of CL. © 2021, CC BY.

关键词： Petroleum reservoir evaluation

来源：评论

学校读者我要写书评

暂无评论

Memristive Bellman solver for decision-making

引用

Nature communications 2025年第1期16卷 4925页

作者： Zhe Feng Zuheng Wu Jianxun Zou Lingli Cheng Xiaolong Zhao Xumeng Zhang Jian Lu Cong Wang Yilin Wang Haochen Wang Wenbin Guo Zhibin Qian Yunlai Zhu Zuyu Xu Yuehua Dai Qi Liu School of Integrated Circuits Anhui University Hefei Anhui China. School of Integrated Circuits Anhui University Hefei Anhui China. wuzuheng@***. Frontier Institute of Chip and System Fudan University Shanghai China. School of Microelectronics University of Science and Technology of China Hefei China. Research Center for Intelligent Computing Hardware Zhejiang Laboratory Hangzhou China. Institute of Brain-inspired Intelligence National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing China. School of Integrated Circuits Anhui University Hefei Anhui China. daiyuehua@***. Frontier Institute of Chip and System Fudan University Shanghai China. qi_liu@***.

The Bellman equation, with a resource-consuming solving process, plays a fundamental role in formulating and solving dynamic optimization problems. The realization of the Bellman solver with memristive computing-in-memory (MCIM) technology, is significant for implementing efficient dynamic decision-making. However, the iterative nature of the Bellman equation solving process poses a challenge for efficient implementation on MCIM systems, which excel at vector-matrix multiplication (VMM) operations but are less suited for iterative algorithms. In this work, by incorporating the temporal dimension and transforming the solution into recurrent dot product operations, a memristive Bellman solver (MBS) is proposed, facilitating the implementation of the Bellman equation solving process with efficient MCIM technology. The MBS effectively reduces the iteration numbers and which further enhanced by approximated solutions leveraging memristor noise. Finally, the path planning tasks are used to verify the feasibility of the proposed MBS. The theoretical derivation and experimental results demonstrate that the MBS effectively reduces the iteration cycles, facilitating the solving efficiency. This work could be a sound of choice for developing high-efficiency decision-making systems.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Ultrafast electron transport in metallic antiferromagnetic Mn2Au thin films probed by terahertz spectroscopy

引用

Physical Review B 2020年第1期102卷 014438-014438页

作者： Zuanming Jin Shunyi Ruan Xiaofeng Zhou Bangju Song Cheng Song Xianzhe Chen Feng Pan Yan Peng Chao Zhang Guohong Ma Yiming Zhu Songlin Zhuang Terahertz Technology Innovation Research Institute Terahertz Spectrum and Imaging Technology Cooperative Innovation Center Shanghai Key Lab of Modern Optical System University of Shanghai for Science and Technology Shanghai 200093 China Department of Physics Shanghai University Shanghai 200444 China Shanghai Institute of Intelligent Science and Technology Tongji University Shanghai 200092 China Key Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing 100084 China Institute for Superconducting and Electronic Materials University of Wollongong New South Wales 2500 Australia SIOM & STU Joint Laboratory for superintense lasers and the applications Shanghai 201210 China

The ultrafast electron transport is central to the requirement of all-electrically controlled spintronics in metallic collinear antiferromagnetic (AFM) Mn2Au thin films within the terahertz (THz) range. Here we use the THz time-domain spectroscopy to measure the conductivity spectra of Mn2Au thin films with different thicknesses and temperatures. We demonstrate an onset of carrier localization in Mn2Au with decreasing the film thickness from 15 to 5 nm. By using optical pump-THz probe spectroscopy, we found the surface trapping states in the thinnest Mn2Au film limit its photoconductivity significantly. The DC conductivity and scattering time become larger and longer with decreasing temperature for all samples, which suggests that Mn2Au behaves in a typical metallic fashion. The THz optical and conductivity properties of Mn2Au films will advance our understanding of ultrafast electronic transport processes in AFM Mn2Au thin films.

关键词： Carrier dynamics Carrier generation & recombination Charge Dielectric properties Electrical conductivity Electron relaxation Inverse spin Hall effect Photoconductivity Spin-orbit coupling Ultrafast magnetic effects Antiferromagnets Terahertz spectroscopy Terahertz techniques Terahertz time-domain spectroscopy

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：