检索结果-内蒙古大学图书馆

New Sensing Technologies for Monitoring Machinery,Structures,and manufacturing Processes

Journal of Dynamics, Monitoring and Diagnostics 2023年第2期2卷 69-88页

作者： JDMD Editorial Office Zhaoyan Fan Robert X.Gao Qingbo He Yi Huang Tianxi Jiang Zhike Peng Luc Thévenaz Yuyong Xiong Shuncong Zhong Editorial Office of JDMD Chongqing University of TechnologyChongqingPeople’s Republic of China Department of Mechanical Industrialand Manufacturing EngineeringOregon State UniversityCorvallisORUSA Department of Mechanical and Aerospace Engineering Case Western Reserve UniversityClevelandOHUSA State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghaiPeople’s Republic of China Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing School of Mechanical Engineering and AutomationFuzhou UniversityFuzhouPeople’s Republic of China Institute of Precision Instrument and Intelligent Measurement&Control Fuzhou UniversityFuzhouPeople’s Republic of China School of Mechanical Engineering Ningxia UniversityYinchuanPeople’s Republic of China EPFL Ecole Polytechnique Fédérale de Lausanne Group for Fibre OpticsSCI-STI-LT Station 111015 LausanneSwitzerland

Sensing is the fundamental technique for sensor data acquisition in monitoring the operation condition of the machinery,structures,and manufacturing *** this paper,we briefly discuss the general idea and advances of various new sensing technologies,including multiphysics sensing,smart materials and metamaterials sensing,microwave sensing,fiber optic sensors,and terahertz sensing,for measuring vibration,deformation,strain,acoustics,temperature,spectroscopic,*** on the observations from the state of the art,we provide comprehensive discussions on the possible opportunities and challenges of these new sensing technologies so as to steer future development.

关键词： fiber optic sensor metamaterials sensing microwave sensing multiphysics sensing terahertz sensing

来源：评论

学校读者我要写书评

暂无评论

Type-II topological metals

引用

Frontiers of physics 2020年第4期15卷 101-112页

作者： Si Li Zhi-Ming Yu Yugui Yao Shengyuan A.Yang Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innouation Center for Quantum Efects and ApplicationsHunan Norrmal UniversityChangsha 410081China Research Laboratory for Quantum Materials Singapore University of Technology and DesignSingapore 487372Singapore Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(MOE) Beijing Key Lab of Nanophotonics&Utrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China

Topological metals(TMs)are a kind of special metallic materials,which feature nontrivial band Cross-ings near the Fermi energy,giving rise to peculiar quasiparticle *** can be classified based on the characteristics of these band *** example,according to the dimensionality of the crossing,TMs can be classifed into nodal-point,nodal-line,and nodal-surface *** important property is the type of *** to degree of the tilt of the local dispersion around the crossing,we have typeI and type-II *** leads to significant distinctions in the physical properties of the materials,owing to their contrasting Fermi surface *** this article,we briefly review the recent advances in this research direction,focusing on the concepts,the physical properties,and the material realizations of the type-Il nodal-point and nodal-line TMs.

关键词： type-II nodal point nodal line topological metals

来源：评论

学校读者我要写书评

暂无评论

Diff9D: Diffusion-Based Domain-Generalized Category-Level 9-DoF Object Pose Estimation

引用

IEEE Transactions on Pattern Analysis and Machine Intelligence 2025年第7期47卷 5520-5537页

作者： Jian Liu Wei Sun Hui Yang Pengchao Deng Chongpei Liu Nicu Sebe Hossein Rahmani Ajmal Mian National Engineering Research Center for Robot Visual Perception and Control Technology College of Electrical and Information Engineering School of Robotics and the State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha China Institute of Artificial Intelligence and Robotics Xi’an Jiaotong University Xi’an China Department of Information Engineering and Computer Science University of Trento Trento Italy School of Computing and Communications Lancaster University Lancaster U.K. Department of Computer Science The University of Western Australia Crawley WA Australia

Nine-degrees-of-freedom (9-DoF) object pose and size estimation is crucial for enabling augmented reality and robotic manipulation. Category-level methods have received extensive research attention due to their potential for generalization to intra-class unknown objects. However, these methods require manual collection and labeling of large-scale real-world training data. To address this problem, we introduce a diffusion-based paradigm for domain-generalized category-level 9-DoF object pose estimation. Our motivation is to leverage the latent generalization ability of the diffusion model to address the domain generalization challenge in object pose estimation. This entails training the model exclusively on rendered synthetic data to achieve generalization to real-world scenes. We propose an effective diffusion model to redefine 9-DoF object pose estimation from a generative perspective. Our model does not require any 3D shape priors during training or inference. By employing the Denoising Diffusion Implicit Model, we demonstrate that the reverse diffusion process can be executed in as few as 3 steps, achieving near real-time performance. Finally, we design a robotic grasping system comprising both hardware and software components. Through comprehensive experiments on two benchmark datasets and the real-world robotic system, we show that our method achieves state-of-the-art domain generalization performance.

关键词： Shape Solid modeling Three-dimensional displays Pose estimation Training Robots Grasping Diffusion models Real-time systems Point cloud compression

来源：评论

学校读者我要写书评

暂无评论

Forming mechanisms based simulation and prediction of grinding surface roughness for abrasive belt rail grinding 5

Forming mechanisms based simulation and prediction of grindi...

引用

5th CIRP Conference on Surface Integrity, CSI 2020

作者： Zhao, Chaoyue Li, Jianyong Wang, Wenxi School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing100044 China State Key Laboratory of Mechanical Transmissions Chongqing University Chongqing400044 China Key Laboratory of Vehicle Advanced Manufacturing Measuring and Control Technology Ministry of Education China

Abrasive belt rail grinding (ABRG) was recently applied to repair the contour of the rail and eliminate the surface damage of the rail. Besides, it is desirable to not only suppress the occurrence of new damage but also to improve driving comfort and reduce wheel-rail wear. The surface roughness of the rail directly affects the contact noise, vibration, friction, and wear of the wheel-rail. However, due to the complicated contact state in belt grinding, the surface roughness forming mechanisms are still unclear. Therefore, it is necessary to study the influence of ABRG on surface roughness and to obtain a prediction method for roughness. In this paper, the initial morphology of the abrasive belt was created by using 2D digital filtering technology. The discretization method was used to simplify the entire belt grinding process into several local surface grinding processes carrying different contact pressure. The grinding depth of the abrasive particles on the local abrasive belt at various times was calculated, and the envelope of the cutting edge was induced according to the grinding depth of the effective abrasive grits. The roughness simulation of ABRG based on the forming mechanism was realized, and the 2D roughness of the processed surface was investigated. The good consistency between simulation and experimental results successfully proved the validity of the proposed method, and they both show that the contact force has a significant positive correlation to both Ra and Rsm. © 2020 The Author(s).

关键词： Surface roughness

来源：评论

学校读者我要写书评

暂无评论

Automated Assembly by Two-Fingered Microhand for Fabrication of Soft Magnetic Microrobots

Automated Assembly by Two-Fingered Microhand for Fabrication...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： Yue Zhao Xiaoming Liu Ruixi Wang Dan Liu Masaru Kojima Qiang Huang Tatsuo Arai Key Laboratory of Biomimetic Robots and Systems Ministry of Education State Key Laboratory of Intelligent Control and Decision of Complex System Beijing Advanced Innovation Center for Intelligent Robots and Systems Beijing China School of Mechatronical Engineering Beijing Institute of Technology Beijing China Department of Intelligent Manufacturing Shenzhen International Graduate School Tsinghua University Shenzhen China Department of Materials Engineering Science Osaka University Osaka Japan Center for Neuroscience and Biomedical Engineering The University of Electro-Communications Tokyo Japan

ISBN: (数字)9798350384574

ISBN: (纸本)9798350384581

Micro-assembly is an emerging method to fabricate microrobots with multiple modules or particles. However, there is always a lack of a flexible and efficient method to freely create the desired magnetic soft microrobots. In this paper, an automated assembly system based on a two-fingered microhand is presented for fabricating magnetic soft microrobots. Our proposed system can automatically pick and place components to assemble microrobots with a two-fingered micromanipulator, and orient these components through an external magnetic field. The automated assembly has the advantages of high accuracy, high speed, and high success rate. It can endow magnetic microrobots with flexible material selection, arbitrary geometry design, and programable magnetization profile. We can make full use of this system to fabricate multiple magnetic soft microrobots. The experiment results demonstrate that this system can efficiently fabricate microrobots with excellent mechanical properties, which have application potential in robotics, biomedical engineering, and environmental governance.

关键词： Three-dimensional displays Shape Micromanipulators Magnetization Manuals Three-dimensional printing Soft magnetic materials

来源：评论

学校读者我要写书评

暂无评论

4m: Mixstyle-Based Multi-Scale Mlp-Mixer for Mechanical Fault Diagnosis Under Variable Working Conditions

SSRN

引用

SSRN 2023年

作者： Luo, Gan Zhang, Lei Qi, Hongtuo Yang, Zhile Wu, Zhou School of Civil Engineering Chongqing University Chongqing400045 China Key Laboratory of Metallurgical Equipment and Control Technology Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Institute for Smart City of Chongqing University in Liyang Chongqing University Liyang Jiangsu213300 China Shenzhen Institute of Advanced Integration Technology Chinese Academy of Sciences Guangdong Shenzhen518060 China School of Automation Chongqing University Chongqing400045 China

Intelligent diagnosis is a critical technology in modern manufacturing. Most existing methods tend to use convolutional neural network (CNN) for fault diagnosis (FD) under constant operating conditions. However, the architecture of CNN is limited, resulting in poor global perception ability and high inductive bias. Variable bearing operating conditions will cause a shift in data distribution. To address these issues, this study proposes a MixStyle-based Multi-scale MLP-Mixer (4M) method that expands the statistical features of MixStyle-based data. MixStyle improves the generalization of the samples fed into the neural network and allows it to improve domain invariance learning even further. The multi-scale MLP-mixer based approach can effectively learn the multi-scale feature patterns and global information in the time-frequency (TF) image samples. The experimental results indicate that the proposed method has better diagnostic effects as well as stronger robustness and generalization abilities. © 2023, The Authors. All rights reserved.

关键词： Failure analysis

来源：评论

学校读者我要写书评

暂无评论

Design of a novel flexible assistive hand exoskeleton

Design of a novel flexible assistive hand exoskeleton

引用

Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Guotao Li Long Cheng Zhengrun Gao Jilong Lu Yanjiang Zhao State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China The National Clinical Research Center for Aging and Medicine Fudan University Shanghai China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Harbin China Intelligent Machine Institute Harbin University of Science and Technology Harbin China

ISBN: (纸本)9781665465373

Hand paralysis caused by stroke, spinal cord injury, or neurological trauma has a significant impact on the independence and quality of life of the patients. The hand exoskeleton can provide hand assistance and improve the patient’s grasp. In this article, a novel wearable flexible hand exoskeleton is proposed to assist users in activities of daily life. To create a simple and lightweight assistive hand exoskeleton, 3D printing is used to manufacture most of the components, and a remote drive system is designed to reduce the weight of the hand exoskeleton. A ball pair device and a slider device are used to ensure the freedom of the thumb and the adaptability of the hand exoskeleton to different hand sizes. Finally, the experiments are conducted to verify that the hand exoskeleton can achieve motion assistance.

关键词： Exoskeletons Thumb Metals Stroke (medical condition) Three-dimensional printing Motion capture Paralysis

来源：评论

学校读者我要写书评

暂无评论

Anisotropic Martensitic Transformation in B2-CuZr-Structured Crystallites

SSRN

引用

SSRN 2024年

作者： Dong, Jie Huang, Yan Zhang, Yibo Sun, Baoan Yang, Ming Wei, Xuerui Lu, Zhichao Zhang, Fan Liang, Zhiyuan Zhao, Jinkui Song, Wenli Wu, Yuan Lu, Zhaoping Wang, Xun-Li Ma, Dong Songshan Lake Materials Laboratory Guangdong Dongguan523808 China Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control Engineering Shenzhen University Shenzhen518060 China Beijing100190 China National Key Laboratory for Metrology and Calibration Techniques China Institute of Atomic Energy Beijing102413 China Beijing100049 China Spallation Neutron Source Science Center Guangdong Dongguan523803 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China Department of Physics City University of Hong Kong 83 Tat Chee Ave. Hong Kong China Spallation Neutron Source China Beijing Advanced Innovation Center for Materials Genome Engineering China

The remarkable mechanical properties achieved in CuZr-based complex alloys consisting of, or containing, austenitic B2-CuZr-structured crystallites rely on the B2→B19' martensitic transformation (MT), which results in the well-known transformation-induced plasticity (TRIP) and shape memory effects. However, owing to the anisotropic nature of crystals, the MT and, in turn, the transformation-induced mechanical behaviors essentially depend on the crystal orientation of B2-CuZr, which remains rarely known in the literature. Here, we present a systematic investigation on the crystallographic orientation-dependent MT in B2-CuZr-structured single crystals using micropillar compression tests. Strong anisotropy is revealed, in which, along loading axis, a near--oriented B2 tends to fracture without MT, whereas a near-/-oriented B2 is prone to MT which leads to extensive plasticity. A critical resolved shear stress (CRSS) is thus determined for the first of its kind, demonstrating that the onset of MT is stress-controlled via a {011}B2 lattice shear in which {011}B2 is the shear plane and B2 is the shear direction. On this basis and using an Eshelby theory-based analysis of triaxial stress fields, we further reveal the anisotropic MT behavior of micrometer-sized monocrystalline B2-CuZr spherulites when embedded in a metallic glass matrix;we show the dominant effect of anisotropic MT on the shear-band/microcrack propagation that eventually leads to fracture in such a B2-containing composite material. Our results shed light on the mechanisms of anisotropic MT with or without matrix confinement, and provide a new perspective for understanding the TRIP-enhanced mechanical properties as well as shape memory/superelastic behaviors of B2-structured or B2-containing complex alloys. © 2024, The Authors. All rights reserved.

关键词： Single crystals

来源：评论

学校读者我要写书评

暂无评论

Tailoring the Anomalous Hall Effect in Van Der Waals Ferromagnet Fe3gete2

SSRN

引用

SSRN 2024年

作者： Wu, Kaile Wang, Qin Wang, Junshan Jiang, Jiaolin Zhao, Tian Zhao, Dong Han, Dan Quan, Zhiyong Ma, Zongmin Wang, Haomin Sang, Shengbo Ge, Yang Shanxi Key Laboratory of Micro Nano Sensors & Artificial Intelligence Perception College of Electronic Information and Optical Engineering Taiyuan University of Technology Taiyuan030024 China Key Lab of Advanced Transducers and Intelligent Control System The Ministry of Education Taiyuan University of Technology Taiyuan030024 China College of Materials Science and Engineering Taiyuan University of Technology Taiyuan030024 China Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education School of Chemistry and Materials Science Shanxi Normal University Taiyuan030031 China State Key Laboratory of Dynamic Measurement Technology North University of China Shanxi Taiyuan030051 China School of Semiconductor and Physics North University of China Shanxi Taiyuan030051 China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai200050 China Shanxi Research Institute of 6D Artificial Intelligence Biomedical Science Taiyuan030024 China

Two-dimensional van der Waals magnetic materials have shown fascinating natural ferromagnetic properties at the atomic level, which has great potential in fields of low power spintronics, quantum computing and optical communication. Herein, the ferromagnetism and magnetic anisotropy of bulk Fe3GeTe2 (FGT) were investigated, and the testing results indicate a pronounced vertical magnetic anisotropy below the Curie temperature (Tc=165 K) of FGT. In addition, the anomalous Hall effect of FGT nanoflakes was studied at various temperatures and thicknesses by standard Hall bar device in detail. The results show the anomalous Hall resistance (0.764 Ω at 20 K decreased to 0.332 Ω at 140 K) and the obvious rectangular magnetic hysteresis rings below Tc (165 K). Furthermore, we calculated the carrier concentration (2.5×1022 cm-3 at 20K) and mobility (13.3 cm2/(v·s) at 20K) under large magnetic field (-6 T~6 T). Particularly, we demonstrated that the strong tailoring ability of the anomalous Hall effect for FGT-based magnetoelectric transport devices comes form the regulation of magnetic moment by sample thickness and magnetic field angle. The above experimental results verify that FGT is expected to be a prime candidate material for ultrathin 2D spintronic devices to the next generation. © 2024, The Authors. All rights reserved.

关键词： Germanium alloys

来源：评论

学校读者我要写书评

暂无评论

Ceramic particles reinforced copper matrix composites manufactured by advanced powder metallurgy:preparation, performance, and mechanisms

引用

International Journal of Extreme manufacturing 2023年第3期5卷 200-234页

作者： Yi-Fan Yan Shu-Qing Kou Hong-Yu Yang Shi-Li Shu Feng Qiu Qi-Chuan Jiang Lai-Chang Zhang State Key Laboratory of Automotive Simulation and Control Jilin UniversityRenmin StreetNo.5988ChangchunJilin Province 130025People’s Republic of China Key Laboratory of Automobile Materials Ministry of Education and Department of Materials Science and EngineeringJilin UniversityRenminStreetNo.5988ChangchunJilin Province 130025People’s Republic of China School of Materials Science and Engineering Jiangsu University of Science and TechnologyJilin Province 130025People’s Republic of China School of Mechanical and Aerospace Engineering Jilin University270 Joondalup DriveJoondalupPerthWestern Australia 6027Australia Centre for Advanced Materials and Manufacturing School of EngineeringEdith Cowan UniversityZhenjiang 212003People’s Republic of China

Copper matrix composites doped with ceramic particles are known to effectively enhance the mechanical properties,thermal expansion behavior and high-temperature stability of copper while maintaining high thermal and electrical *** greatly expands the applications of copper as a functional material in thermal and conductive components,including electronic packaging materials and heat sinks,brushes,integrated circuit lead *** far,endeavors have been focusing on how to choose suitable ceramic components and fully exert strengthening effect of ceramic particles in the copper *** article reviews and analyzes the effects of preparation techniques and the characteristics of ceramic particles,including ceramic particle content,size,morphology and interfacial bonding,on the diathermancy,electrical conductivity and mechanical behavior of copper matrix *** corresponding models and influencing mechanisms are also elaborated in *** review contributes to a deep understanding of the strengthening mechanisms and microstructural regulation of ceramic particle reinforced copper matrix *** more precise design and manipulation of composite microstructure,the comprehensive properties could be further improved to meet the growing demands of copper matrix composites in a wide range of application fields.

关键词： copper matrix composites advanced powder metallurgy model prediction particle characteristics strengthening mechanism

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：