检索结果-内蒙古大学图书馆

Effects of Annealing Below Glass Transition Temperature on the Wettability and Corrosion Performance of Fe-based Amorphous Coatings

引用

Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 243-253页

作者： Dandan Liang Xiaodi Liu Yinghao Zhou Yu Wei Xianshun Wei Gang Xu Jun Shen College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Materials Science and Engineering Tongji UniversityShanghai 201804China

This study investigated the effect of annealing below glass transition temperature(T_(g))on the microstructural characteristics,mechanical property,wettability,and electrochemical performance of activated combustion-high velocity air fuel(AC-HVAF)-sprayed Fe-Cr-Mo-W-C-B-Y amorphous coatings(ACs).Results showed that Fe-based ACs with a thickness of~300μm exhibited a fully amorphous structure with low *** from the reduced free volume,sub-T_(g) annealing increased the thermal stability,hardness,and surface hydrophobicity of Fe-based *** enhanced corrosion resistance of sub-T_(g) annealed ACs in 3.5 wt%NaCl solution was attributed to the increased surface hydrophobicity and passivation *** finding elucidates the correlation between sub-T_(g) annealing and the properties of Fe-based ACs,which promotes ameliorating ACs with superior performance.

关键词： Activated combustion-high velocity air fuel(AC–HVAF) Amorphous coating Sub-Tg annealing Free volume Wettability Electrochemical behavior

来源：评论

学校读者我要写书评

暂无评论

RISK-INFORMED TIME MARGIN ANALYSIS FOR OPERATORS IN MAIN control ROOM OF NUCLEAR POWER PLANT 14

RISK-INFORMED TIME MARGIN ANALYSIS FOR OPERATORS IN MAIN CON...

引用

14th International Conference on Quality, Reliability, Risk, Maintenance, and Safety engineering, QR2MSE 2024

作者： Yang, Leiyue Wen, Ting Xu, Anqi Yang, Ming Liu, Chengxiang Dong, Xiaomeng Li, Linfeng Shenzhen Key Laboratory of Nuclear and Radiation Safety Institute for Advanced Study in Nuclear Energy & Safety College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen China College of Mechatronics and Control Engineering Shenzhen University Shenzhen China

ISBN: (纸本)9781837242672

Nuclear reactor safety is crucial for the sustainable development of nuclear energy and the utilization of clean energy. This paper proposed a comprehensive framework for analyzing nuclear power plant accidents by integrating Risk-Informed Safety Margin Characterization (RISMC) with Human Reliability Analysis (HRA). It dynamically assessed Human Error Probability(HEP) by considering the continuous distribution of factors such as required time and available time for tasks. Unlike the static approach of the Standardized Plant Analysis Risk-Human Reliability Analysis (SPAR-H), this study introduced the concept of time margin to replace available time and established a distribution function for time margin-PSF. The integrated approach of coupling HRA with the RISMC method was applied to analyze Medium Break Loss of Coolant Accident (MLOCA). It utilized RELAP5 program for system simulation and risk analysis of key parameters within discrete intervals, combined with HEP, to evaluate Probability Safety Margin (PSM).The results indicated that, compared to existing safety analysis methods, the approach proposed in this paper adequately characterizes the distribution characteristics of available time for personnel actions and the time required for these actions. The probability of accident sequences, risk levels, and sequence consequences will significantly change with time margin, thereby affecting probabilistic safety margin. By incorporating human factor uncertainties into the PSM value, it is possible to reduce the reliance on expert judgment and conduct risk analysis from a more realistic perspective. © The Institution of engineering & Technology 2024.

关键词： Distribution functions

来源：评论

学校读者我要写书评

暂无评论

Discharge Characteristics and Dynamic Process of Directional Spraying Binary and Ternary Alloy Coating via Electrical Explosion Method 4th

Discharge Characteristics and Dynamic Process of Directional...

引用

4th International Symposium on Plasma and Energy Convention, ISPEC 2022

作者： Li, Chen Feng, Juan Yuan, Wei Cao, Yuchen Han, Ruoyu School of Physics Beijing Institute of Technology Beijing100081 China State Key Laboratory of Mechatronics Engineering and Control Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9789819915750

Electrical explosion spraying, due to its high reaction temperature and intense mechanical effect, like strong shock wave and high-speed expanded explosive products, is a kind of satisfactory thermal spraying method. It had used to prepare single- or multi-element wire coating;however, the investigation of middle physical process was lacked, which was not beneficial to deeply understand the coating formation characteristics with the explosive process. In this study, a directional electrical explosion device was designed, which was available for synthesizing dense and homogeneous coating. Experiments were performed with intertwined Cu-Ni wire, and intertwined Cu-Ni-Al wire. Electrical and radiational diagnoses including current/voltage waveforms and self-emission images were used to investigate the explosive characteristics. SEM and XRD characterizations were used to study the morphology and crystallography of the produced coating. For intertwined two-wire (Cu-Ni) explosion, the parameters were measured separately to explore more details according to the corresponding dynamic high-speed images. The results indicated that the multi-wire explosion was non-synchronously with different explosive behaviors of wires;therefore, the discharge product channel showed a mixture of plasma, un-ionized metal vapor, and un-vaporized metal drops. Accordingly, the sprayed coating was composed by μm-scaled chunks or plates with some nanoparticles adhering on them. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Nanoparticles

来源：评论

学校读者我要写书评

暂无评论

Trust Establishment for the Role-Based Collaborative Multi-Robot Systems

Trust Establishment for the Role-Based Collaborative Multi-R...

引用

2023 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2023

作者： Akbari, Behzad Zhu, Haibin Pan, Ya-Jun Dalhousie University Advanced Control and Mechatronics Laboratory Department of Mechanical Engineering HalifaxNS Canada Nipissing University Collaborative Systems Laboratory Department of Computer Science and Mathematics North BayON Canada

ISBN: (纸本)9798350337020

Trust evaluation and trust establishment play crucial roles in the management of trust within a multi-agent system. When it comes to collaboration systems, trust becomes directly linked to the specific roles performed by agents. The Role-Based Collaboration (RBC) methodology serves as a framework for assigning roles that facilitate agent collaboration. Within this context, the behavior of an agent with respect to a role is referred to as a process role. This research paper introduces a role engine that incorporates a trust establishment algorithm aimed at identifying optimal and reliable process roles. In our study, we define trust as a continuous value ranging from 0 to 1. To optimize trustworthy process roles, we have developed a consensus-based Gaussian Process Factor Graph (GPFG) tool. Our simulations and experiments validate the feasibility and efficiency of our proposed approach with autonomous robots in unsignalized intersections and narrow hallways. © 2023 IEEE.

关键词： Gaussian process factor graph Multi-Agent Systems (MASs) Role-based collaboration Trust management systems

来源：评论

学校读者我要写书评

暂无评论

Multi-objective Optimal Operation of Centralized Battery Swap Charging System with Photovoltaic

引用

Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 149-162页

作者： Yuanzheng Li Yihan Cai Tianyang Zhao Yun Liu Jian Wang Lei Wu Yong Zhao School of Artificial Intelligence and Automation Ministry of Education Key Laboratory of Image Processing and Intelligence ControlHuazhong University of Science and TechnologyWuhanChina School of Electrical and Electronic Engineering Nanyang Technological UniversitySingaporeSingapore College of Mechatronics and Control Engineering Shenzhen UniversityShenzhenChina Department of Electrical&Computer Engineering Stevens Institute of TechnologyHobokenUSA

Electric vehicles(EVs)are widely deployed throughout the world,and photovoltaic(PV)charging stations have emerged for satisfying the charging demands of EV *** paper proposes a multi-objective optimal operation method for the centralized battery swap charging system(CBSCS),in order to enhance the economic efficiency while reducing its adverse effects on power *** proposed method involves a multi-objective optimization scheduling model,which minimizes the total operation cost and smoothes load fluctuations,***,we modify a recently proposed multi-objective optimization algorithm of non-sorting genetic algorithm III(NSGA-III)for solving this scheduling ***,simulation studies verify the effectiveness of the proposed multi-objective operation method.

关键词： Multi-objective optimization electric vehicle battery swap charging system scheduling photovoltaic

来源：评论

学校读者我要写书评

暂无评论

A new active rehabilitation training mode for upper limbs based on Tai Chi Pushing Hands

引用

Biomimetic Intelligence & Robotics 2024年第3期4卷 82-92页

作者： Xiangpan Li Liaoyuan Li Jianhai Han Bingjing Guo Ganqin Du School of Mechatronics Engineering Henan University of Science and TechnologyLuoyang 471003China Henan Provincial Key Laboratory of Robotics and Intelligent Systems Luoyang 471003China School of Automotive Engineering Hubei University of Automotive TechnologyShiyan 442002China Hubei Key Laboratory of Automotive Power Train and Electronic Control Shiyan 442002China The First Affiliated Hospital of Henan University of Science and Technology Luoyang 471003China

Robot-assisted rehabilitation is a crucial approach to restoring motor function in the ***,the current training trajectory lacks sufficient theoretical or practical support,and the monotony of single-mode training is a *** Chi Pushing Hands,a beneficial and effective daily exercise,has been shown to improve balance function,psychological state,and motor function of the upper extremities in patients recovering from *** address these issues,we propose a new active rehabilitation training that incorporates Tai Chi Pushing Hands movements and yin-yang balance *** training trajectory and direction are encoded by the velocity field and consist of two processes:yang(push)and yin(return).During yang,the limb actively pushes the robot to move,while during yin,the limb actively follows the robot’s *** provide necessary assistance,an admittance controller with self-adaptive parameters is *** addition,we introduce two indexes,the‘Intention Angle’(ϖ)and the time ratio(Γ),to evaluate motion perception *** experiment was conducted on a 4-degree-of-freedom upper limb rehabilitation robot platform,and the subjects were separated into a familiar group and an unfamiliar *** experiment results show that the training could be completed well no matter whether the subject is familiar with Tai Chi Pushing Hands or *** parameters and the movement of the robot can be adjusted based on the interactive force to adapt to the ability of the subject.

关键词： Tai Chi Push Hands Velocity field Self-adaptive admittance Upper limb rehabilitation Active training

来源：评论

学校读者我要写书评

暂无评论

An Autonomous Quadrotor Exploration Combining Frontier and Sampling for Environments with Narrow Entrances 41

An Autonomous Quadrotor Exploration Combining Frontier and S...

引用

第41届中国控制会议

作者： Pudong Liu Bo Zhang College of Mechatronics and Control Engineering Shenzhen University Shenzhen City Joint Laboratory of Autonomous Unmanned Systems and Intelligent Manipulation Shenzhen University

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

An autonomous quadrotor exploration method based on frontier and motion primitives sampling is presented for exploring spatial structural environments with multiple narrow entrances,which is a rigorous challenge for traditional RRT *** exploration planning framework includes exploration target selection and autonomous *** local region exploration is implemented by expanding the motion primitives sampling in the exploration target selection,while the global exploration is completed by searching the frontier *** local exploration(LE),the motion primitives are expanded according to the quadrotor state,and the best primitive viewpoint is selected by calculating the score of the motion *** global exploration(GE) process,the best global frontier viewpoint is selected,and the key path points are determined in a global undirected *** exploring target point is selected,the autonomous navigation module generates a safe,smooth,and dynamically feasible trajectory and enables the quadrotor follow *** effectiveness and practicality of the exploration framework is validated through experimental simulations,and compared with other existing methods.

关键词： Exploration Motion Primitives Frontiers Path Planning Trajectory Optimization

来源：评论

学校读者我要写书评

暂无评论

Superior high-temperature wear resistance of an Ir-Ta-Ni-Nb bulk metallic glass

引用

Journal of Materials Science & Technology 2023年第27期158卷 121-132页

作者： Fei Sun Shengtao Deng Jianan Fu Jiahua Zhu Dandan Liang Pengfei Wang Hang Zhao Feng Gong Jiang Ma Yanhui Liu Jun Shen Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics Southern University of Science and Technology Shenzhen 518055China Shanghai Engineering Research Center of Physical Vapor Deposition(PVD)Superhard Coating and Equipment Shanghai Institute of TechnologyShanghai 201418China Institute of Physics Chinese Academy of SciencesBeijing 100190China

Wear resistance is a critical consideration in engineering *** this study,we demonstrated an Ir-Ta-Ni-Nb bulk metallic glass(BMG)with outstanding high-temperature wear resistance and revealed its promising applications in extreme *** wear behavior and mechanism were systemati-cally investigated from room temperature(RT)to 750℃.The results show that the wear rate increases from∼2.65×10^(-6)mm^(3)N^(-1)m^(-1)to∼10.56×10^(-6)mm^(3)N^(-1)m^(-1)in the temperature span RT to 400℃,following abrasive wear and flash temperature-induced oxidative wear during the ***,at the higher temperature of 600℃,further heating due to frictional heat leads to a softening of the wear surface,resulting in a maximum wear rate of∼20.99×10^(-6)mm^(3)N^(-1)m^(-1)under softness-driven abrasive wear as well as oxidative ***,the wear resistance at an even higher temperature of 750℃shows a paradoxical improvement of∼7.08×10^(-6)mm^(3)N^(-1)m^(-1),which is attributed to the formation of an oxide layer with a thickness of several microns,avoiding violent wear of *** re-sults demonstrate the unreported outstanding high-temperature wear resistance of the Ir-Ta-Ni-Nb BMG,especially its excellent capability to resist wear at 750℃,leading to the promising applications of BMG in the fields of aerospace,metallurgy,and nuclear industries.

关键词： High-temperature alloy Superior wear resistance Wear mechanisms Bulk metallic glass

来源：评论

学校读者我要写书评

暂无评论

Effect of Room Temperature Ultrasonic Vibration Compression on the Microstructure Evolution and Mechanical Properties of AZ91 Alloy

引用

Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1135-1146页

作者： Ziyue Xu Huan Liu Luyao Li Chao Sun Xi Tan Baishan Chen Qiangsheng Dong Yuna Wu Jinghua Jiang Jiang Ma College of Materials Science and Engineering Hohai UniversityNanjing210000China Suzhou Research Institute of Hohai University Suzhou215000China Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen518060China Institute of Medical Devices(Suzhou) Southeast UniversitySuzhou215163China Institute for Advanced Study Central South UniversityChangsha410083China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing211167China

To investigate the potential of direct ultrasonic vibration on improving the performance of magnesium alloys,this study first employed the ultrasonic vibration compression(UVC)on the solid solution treated AZ91 alloy,and explored its microstructure evolution and mechanical properties under *** only two seconds,the UVC alloys showed large deformation strains of 34.8–54.4%,and sudden increase of sample temperature to 243℃.Microstructure characterizations proved that UVC promoted the formation of abundant shear bands,fine grains,and the bimodal distribution of Mg17Al12 precipitates consisting of submicron particles located within the shear bands and nano-sized ones within the *** to the unique microstructure,the micro-hardness(and nano-hardness)value of UVC alloy was increased by 37.7%(35%)when compared with the solution-treated ***,the nano-modulus of the developed AZ91 alloy was also significantly increased to 62 GPa by statistical nanoindentation tests,which could be ascribed to increased Mg_(17)Al_(12) precipitates and decreased c/a value to some *** general,this work provides a new insight into the design and preparation of high-performance magnesium alloys by UVC at room temperature.

关键词： AZ91 alloys Ultrasonic vibration compression Precipitation Shear bands Mechanical properties

来源：评论

学校读者我要写书评

暂无评论

Optimized design and performance testing of hydraulic electrostatic actuator

引用

International Journal of Smart and Nano Materials 2024年第4期15卷 811-834页

作者： Yuze Ye Qingsong He Changli Yang Xiaodong Xu Lin Xie Diyi Liu Bo Zeng Zhijian Leng Jiangsu Key Laboratory of Bionic Materials and Equipment College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina Key Laboratory of Advanced Technology for Small and Medium-Sized UAV Ministry of Industry and Information TechnologyUnmanned Aerial Vehicles Research InstituteNanjing University of Aeronautics and AstronauticsNanjingChina State Key Laboratory of Mechanics and Control of Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjingChina Laboratory of Aerospace Servo Actuation and Transmission Beijing Institute of Precision Mechatronics and ControlsBeijingChina Technology Center CCCC Second Harbor Engineering CompanyWuhanChina

Hydraulic electrostatic actuators have become a research hotspot for their inherent flexibility and safety of human-machine *** paper aims to combine the characteristics of dielectric elastomers and fluid actuators,enhancing the dielectric constant and breakdown field strength by modifying Al_(2)O_(3)on the surface of nanostructured BaTiO3 and in order to develop a hydraulic electrostatic actuator with silicone rubber as the matrix ***-factor experiments were firstly conducted to confirm the range of three factors affecting the actuation strain of the actuator:BaTiO_(3)@Al_(2)O_(3)content,thickness of the silicone rubber elastomer film,and pre-stretching ratio *** response surface methodology was used to study the interactive influence of the above three influencing factors on the actuation *** was obtained that A has an insignificant influence on the actuation strain,AB has a significant influence on the actuation strain,and B,C,AC,and BC have a highly influence on the actuation *** actuation strain as the optimization objective yielded the combination results of each factor:BaTiO_(3)@Al_(2)O_(3)content of 2.57%,thickness of 0.60 mm,and pre-stretching ratio coefficient of *** strain tests were conducted with optimized parameters under *** experimental results of the actuation strain test show that the relative error between the test value and the model prediction value of 16.47%is less than 5%,and the optimization model results are *** optimized hydraulic electrostatic actuator was tested for actuation strain and electrical performance under different *** experiment showed that the maximum actuation strain of the hydraulic electrostatic actuator was 17.20%under a load of 100 *** critical breakdown current of the actuator ranged from 115μA to 130μA,and the maximum electromechanical conversion efficiency of the actuator under different loads was 67.93%.Finally,a joint actuati

关键词： Hydraulic electrostatic actuator BaTiO_(3)@Al_(2)O_(3) response surface experiments actuation strain

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：