检索结果-内蒙古大学图书馆

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

作者： Qin, Yankai Shang, Chao Li, Xiangyu Zhang, Xiaohong Luo, Yuangeng Zhang, Miao CCTEG Taiyuan Research Institute Co Ltd Taiyuan China Shanxi Tiandi Coal Mining Machinery Co Ltd Taiyuan China Department of Automation Tsinghua University Beijing China School of Mechanical and Transportation Engineering Taiyuan University of Technology Taiyuan China Division of Industrial and System Engineering Taiyuan University of Science and Technology Taiyuan China

ISBN: (纸本)9781837242672

Multi-component replacement repairable systems refer to systems wherein all critical components are replaced in batches after a given production cycle, while defective parts are taken offline for maintenance before being reused as the system continues to operate. This paper focuses on multi-component replacement repairable systems composed of multiple identical components, defining a grouped replacement and offline condition-based maintenance strategy. The concept of maintenance degree is introduced to indicate the extent of maintenance on a component, and a model is constructed where maintenance effects, costs, and durations are determined by this degree of maintenance. By analyzing the state transition characteristics of the system operating under alternating conditions of operational and replacement components, a steady-state probability model of system degradation is derived. Considering factors such as maintenance time, cost, and effectiveness, an average cost rate model within a finite time frame is established to determine the optimal system replacement period, preventive maintenance thresholds, and degree of maintenance. The correctness and effectiveness of the strategy and model are verified using a seven-roll continuous hot-rolling system as a case study, along with an analysis of parameter sensitivity. © The Institution of engineering & Technology 2024.

关键词： Condition based maintenance

来源：评论

学校读者我要写书评

暂无评论

Nature-inspired dynamic control for pursuit-evasion of robots

arXiv

引用

arXiv 2024年

作者： Zhou, Panpan Li, Sirui Zhao, Benyun Wahlberg, Bo Hu, Xiaoming Department of Mathematics KTH Royal Institute of Technology Stockholm Sweden Department of Transport and System Analysis KTH Royal Institute of Technology Stockholm Sweden Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong Division of Decision and Control Systems KTH Royal Institute of Technology Stockholm Sweden

The pursuit-evasion problem is widespread in nature, engineering, and societal applications. It is commonly observed in nature that predators often exhibit faster speeds than their prey but have less agile maneuverability. Over millions of years of evolution, animals have developed effective and efficient strategies for both pursuit and evasion. In this paper, we provide a dynamic framework for the pursuit-evasion problem of unicycle systems, drawing inspiration from nature. First, we address the scenario involving one pursuer and one evader by proposing an Alert-Turn control strategy, which consists of two efficient ingredients: a sudden turning maneuver and an alert condition for starting and maintaining the maneuver. We present and analyze the escape and capture results at two levels: a lower level of a single run and a higher level with respect to parameters’ changes. In addition, we provide a theorem with sufficient conditions for capture. The Alert-Turn strategy is then extended to more complex scenarios involving multiple pursuers and evaders by integrating aggregation control laws and a target-changing mechanism. By adjusting a ‘selfish parameter’, the aggregation control commands produce various escape patterns of evaders: cooperative mode, selfish mode, as well as their combinations. The influence of the selfish parameter is quantified, and the effects of the number of pursuers and the target-changing mechanism are explored from a statistical perspective. Our findings align closely with observations in nature. Finally, the proposed control strategies are validated through numerical simulations that replicate some chasing behaviors of animals in nature. Copyright © 2024, The Authors. All rights reserved.

关键词： Animals

来源：评论

学校读者我要写书评

暂无评论

Optimal condition-based maintenance decisions for group-replacement multi-component repairable system

Optimal condition-based maintenance decisions for group-repl...

引用

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

作者： Yankai Qin Chao Shang Xiangyu Li Xiaohong Zhang Yuangeng Luo Miao Zhang CCTEG Taiyuan Research Institute Co Ltd Taiyuan People's Republic of China Department of Automation Tsinghua University Beijing People's Republic of China School of Mechanical and Transportation Engineering Taiyuan University of Technology Taiyuan People's Republic of China Division of Industrial and System Engineering Taiyuan University of Science and Technology Taiyuan People's Republic of China

ISBN: (数字)9781837241958

关键词：

来源：评论

学校读者我要写书评

暂无评论

Precipitation-strengthened micromechanical behaviors of magnesium alloy under cyclic loading

引用

Journal of Magnesium and Alloys 2024年

作者： Liu, Chuhao Xie, Di Gao, Yanfei Zhang, Xiaodan Zhong, Shengyi Wang, Huamiao An, Ke Liaw, Peter K. Peng, Yinghong State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai200240 China Department of Materials Science and Engineering The University of Tennessee KnoxvilleTN37996 United States School of mechanical engineering and automation Fuzhou University Fujian 350116 China School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai200249 China SJTU Paris Elite Institute of Technology Shanghai Jiao Tong University Shanghai200240 China Neutron Scattering Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Shanghai Frontier Science Center of Mechanoinformatics Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering Science Shanghai University Shanghai200072 China

The microscopic-deformation mechanisms of an extruded magnesium alloy with and without precipitates [Guinier-Preston (GP) zones] subjected to cyclic deformation were investigated by in-situ neutron-diffraction (ND) measurements and crystal-plasticity modeling. The relationship between the macroscopic-cyclic-deformation behavior and the microscopic responses (particularly twinning and detwinning) at the grain level was established. The general deformation-mechanism evolution in the solution-state (ST) sample was similar to that in the peak-aged-state (PA) sample over fatigue cycles. Both samples plastically deformed by extension twinning during compression, and by a sequential process of detwinning and dislocation motion under reverse tension. The main difference is that in the PA sample, the presence of precipitating particles constrains the twinning/detwinning behaviors, which leads to an increase in the participation of dislocation slip in the plastic deformation and then induces a strengthening effect during cyclic loading. Based on the combination of the previous in-situ ND results and crystal-plasticity model, our work provides a comprehensive analysis of the interaction between the precipitation strengthening and twinning/detwinning mechanism under the whole multi-cycle cyclic loading and their effect on the macro- and micro-mechanical behavior of the precipitate-strengthened magnesium alloys. © 2024

关键词： Magnesium alloys

来源：评论

学校读者我要写书评

暂无评论

Protocol for the fabrication of self-standing (nano)cellulose-based 3D scaffolds for tissue engineering

引用

STAR Protocols 2025年第1期6卷 103583页

作者： Mohan, Tamilselvan Bračič, Matej Bračič, Doris Lackner, Florian Nagaraj, Chandran Štiglic, Andreja Dobaj Kargl, Rupert Kleinschek, Karin Stana Graz University of Technology Institute for Chemistry and Technology of Biobased System (IBioSys) Stremayrgasse 9 Graz 8010 Austria University of Maribor Faculty of Mechanical Engineering Laboratory for Characterization and Processing of Polymers Smetanova Ulica 17 Maribor 2000 Slovenia Department of Internal Medicine Division of Pulmonology Medical University of Graz Graz Austria Institute of Automation Faculty of Electrical Engineering and Computer Science University of Maribor Maribor Slovenia Members of the European Polysaccharide Network of Excellence (EPNOE) Austria

Three-dimensional (3D) and porous scaffolds made from nanocellulosic materials hold significant potential in tissue engineering (TE). Here, we present a protocol for fabricating self-standing (nano)cellulose-based 3D scaffolds designed for in vitro testing of cells from skin and cartilage tissues. We describe steps for preparation of nanocellulose ink, scaffold formation using 3D printing, and freeze-drying. We then detail post-processing procedures to enhance mechanical properties, stability, and biocompatibility. This protocol offers researchers a framework for developing versatile and sustainable biomaterials for regenerative medicine. For complete details on the use and execution of this protocol, please refer to Mohan et al.¹ and Štiglic et al.² © 2025 The Authors

关键词： Biotechnology and bioengineering Chemistry Material sciences Tissue engineering

来源：评论

学校读者我要写书评

暂无评论

Recent Advances in Triboelectric Nanogenerators: From Technological Progress to Commercial Applications

引用

ACS Nano 2023年第12期17卷 11087-11219页

作者： Choi, Dongwhi Lee, Younghoon Lin, Zong-Hong Cho, Sumin Kim, Miso Ao, Chi Kit Soh, Siowling Sohn, Changwan Jeong, Chang Kyu Lee, Jeongwan Lee, Minbaek Lee, Seungah Ryu, Jungho Parashar, Parag Cho, Yujang Ahn, Jaewan Kim, Il-Doo Jiang, Feng Lee, Pooi See Khandelwal, Gaurav Kim, Sang-Jae Kim, Hyun Soo Song, Hyun-Cheol Kim, Minje Nah, Junghyo Kim, Wook Menge, Habtamu Gebeyehu Park, Yong Tae Xu, Wei Hao, Jianhua Park, Hyosik Lee, Ju-Hyuck Lee, Dong-Min Kim, Sang-Woo Park, Ji Young Zhang, Haixia Zi, Yunlong Guo, Ru Cheng, Jia Yang, Ze Xie, Yannan Lee, Sangmin Chung, Jihoon Oh, Il-Kwon Kim, Ji-Seok Cheng, Tinghai Gao, Qi Cheng, Gang Gu, Guangqin Shim, Minseob Jung, Jeehoon Yun, Changwoo Zhang, Chi Liu, Guoxu Chen, Yufeng Kim, Suhan Chen, Xiangyu Hu, Jun Pu, Xiong Guo, Zi Hao Wang, Xudong Chen, Jun Xiao, Xiao Xie, Xing Jarin, Mourin Zhang, Hulin Lai, Ying-Chih He, Tianyiyi Kim, Hakjeong Park, Inkyu Ahn, Junseong Huynh, Nghia Dinh Yang, Ya Wang, Zhong Lin Baik, Jeong Min Choi, Dukhyun Kyung Hee University Gyeonggi Yongin17104 Korea Republic of Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States Department of Mechanical Engineering Soft Robotics Research Center Seoul National University Seoul08826 Korea Republic of Department of Mechanical Engineering Gachon University Seongnam13120 Korea Republic of Department of Biomedical Engineering National Taiwan University Taipei10617 Taiwan Frontier Research Center on Fundamental and Applied Sciences of Matters National Tsing Hua University Hsinchu30013 Taiwan School of Advanced Materials Science & Engineering Sungkyunkwan University Suwon16419 Korea Republic of Sungkyunkwan University 2066 Seobu-ro Gyeonggi Suwon16419 Korea Republic of Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 117585 Singapore Division of Advanced Materials Engineering Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Jeonbuk National University 567 Baekje-daero Jeonbuk Jeonju54896 Korea Republic of Department of Physics Inha University 100 Inha-ro Incheon22212 Korea Republic of School of Materials Science & Engineering Yeungnam University Gyeongbuk Gyeongsan38541 Korea Republic of 291 Daehak-ro Daejeon34141 Korea Republic of School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue 639798 Singapore Institute of Flexible Electronics Technology of Tsinghua Zhejiang Jiaxing314000 China Nanomaterials and System Lab Major of Mechatronics Engineering Faculty of Applied Energy System Jeju National University Jeju632-43 Korea Republic of School of Engineering University of Glasgow GlasgowG128QQ United Kingdom Seoul02792 Korea Republic of Department of Physics Inha University Incheon22212 Korea Republic of Suwon16419 Korea Republic of Department of

Serious climate changes and energy-related environmental problems are currently critical issues in the world. In order to reduce carbon emissions and save our environment, renewable energy harvesting technologies will serve as a key solution in the near future. Among them, triboelectric nanogenerators (TENGs), which is one of the most promising mechanical energy harvesters by means of contact electrification phenomenon, are explosively developing due to abundant wasting mechanical energy sources and a number of superior advantages in a wide availability and selection of materials, relatively simple device configurations, and low-cost processing. Significant experimental and theoretical efforts have been achieved toward understanding fundamental behaviors and a wide range of demonstrations since its report in 2012. As a result, considerable technological advancement has been exhibited and it advances the timeline of achievement in the proposed roadmap. Now, the technology has reached the stage of prototype development with verification of performance beyond the lab scale environment toward its commercialization. In this review, distinguished authors in the world worked together to summarize the state of the art in theory, materials, devices, systems, circuits, and applications in TENG fields. The great research achievements of researchers in this field around the world over the past decade are expected to play a major role in coming to fruition of unexpectedly accelerated technological advances over the next decade. © 2023 The Authors. Published by American Chemical Society

关键词： Nanogenerators

来源：评论

学校读者我要写书评

暂无评论

Compact-design, Modeling and Simulation of the Internal Permanent Magnet of Magnetically Guided Capsule Endoscope

引用

Journal of Physics: Conference Series 2022年第1期2187卷

作者： Guanqing Zhang Ruixue Yin Kemin Wang Wenjun Zhang Biomedical Science and Technology Research Center School of Mechatronic Engineering and Automation Shanghai University Shanghai 200444 China Complex and Intelligent System Research Laboratory (CISRL) School of Mechanical and Power Engineering East China University of Science and Technology Shanghai 200237 China Division of Biomedical Engineering University of Saskatchewan Saskatchewan Canada

Miniaturization is a challenge for the magnetically guided capsule endoscope (MGCE), especially considering the multifunction of MGCE. This paper proposes a compact-design of internal permanent magnet (IPM), which contributes to the miniaturization of MGCE. The IPM is a complex of actuator and shell of the MGCE, which frees the occupation of conventional IPM. The IPM is for the first time designed with a streamline shape for good kinematics. A magnetic propulsion model of the proposed IPM is established and a magnetic propulsion simulation based on finite element (FE) and boundary element (BE) analysis for guaranteeing steady locomotion and navigation is conducted. The simulation is validated by comparison of the analytical model. At last, the locomotion modes and navigation of IPM are simulated based on the justified simulation. In conclusion, the compact-design of IPM can guarantee the locomotion and navigation of MGCE, and increase the available inner space of MGCE.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Magnetic Continuum Robot for Intelligent Manipulation in Medical Applications

SmartBot

引用

SmartBot 2025年

作者： Yuanbiao Ma Xuanyu An Qijun Yang Mingxue Cai Zhiqiang Tang Jinke Chang Veronica Iacovacci Tiantian Xu Li Zhang Qianqian Wang Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical Engineering Southeast University Nanjing China Guangdong Provincial Key Laboratory of Robotics and Intelligent System Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen China Department of Mechanical Engineering National University of Singapore Queenstown Singapore Department of Engineering Science University of Oxford Oxford UK Department of Surgical Biotechnology Division of Surgery & Interventional Science Centre for Biomaterials in Surgical Reconstruction and Regeneration University College London London UK BioRobotics Institute Scuola Superiore Sant’Anna Pisa Italy Department of Excellence in Robotics & AI Scuola Superiore Sant’Anna Pisa Italy Department of Mechanical and Automation Engineering The Chinese University of Hong Kong Hong Kong China Chow Yuk Ho Technology Center for Innovative Medicine The Chinese University of Hong Kong Hong Kong China Multi-Scale Medical Robotics Center Hong Kong Science Park Hong Kong China

Magnetic continuum robots (MCRs) have garnered substantial attention as a new class of flexible robotic systems capable of navigating complex and confined spaces with remarkable dexterity. By combining continuous, deformable structures with remotely applied magnetic fields, MCRs achieve contactless, remote manipulation, making them well-suited for medical applications. This review introduces recent advances in MCR research, focusing on design principles, structural configurations, and control strategies. Various MCR designs and structures, including those integrated with permanent magnets, magnetic matter, ferromagnetic sphere, and micro coil, are discussed. Furthermore, different magnetic actuation platforms are introduced, and the level of MCR automation is classified based on control strategies. Key intelligent manipulation capabilities of MCRs, including navigation, delivery, printing, grasping, imaging, and sensing are explored. Finally, future development priorities and directions are identified to provide insights for advancing intelligent robotic systems.

关键词： intelligent manipulation magnetic actuation magnetic continuum robot medical application

来源：评论

学校读者我要写书评

暂无评论

Performance and exergy analysis of an inclined solar still with baffle arrangements

引用

Heliyon 2023年第4期9卷 e14807页

作者： S Seralathan G Chenna Reddy S Sathish A Muthuram Joshuva Arockia Dhanraj Natrayan Lakshmaiya Karthikeyan Velmurugan Chatchai Sirisamphanwong Rattapon Ngoenmeesri Chattariya Sirisamphanwong School of Aeronautical Sciences Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Department of Mechanical Engineering Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Centre for Automation & Robotics (ANRO) Department of Mechatronics Engineering Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Department of Mechanical Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai India. Center for Alternative Energy Research and Development Khon Kaen University Thailand. Mechanical Engineering Division Faculty of Engineering Khon Kaen University Khon Kaen Thailand. Smart Energy System Integration Research Unit Department of Physics Faculty of Science Naresuan University Thailand. Research and Academic Service Faculty of Science Naresuan University Thailand. Department of Physics and General Science Faculty of Science Nakhon Sawan Rajabhat University Thailand.

This study presents the details of performance and exergy investigations on an inclined solar still with baffle arrangements. The shortage of consumable water creates the transformation of accessible brackish water into consumable water an unavoidable one and this can be accomplished utilizing sun-oriented refining. To remove drinkable water from pungent water, sun-oriented still is broadly utilized. To build the contact season of the pungent water with sunlight-based brilliance, perplex course of action is set to expand the opposition in the stream. This prompts more vanishing of brackish water. Therefore, the objective of this study is to improve freshwater yield. The experimental study is performed for two different mass flow rates (m = 0.0833 kg/min and m = 0.166 kg/min). An increase in the mass flow of water directly deteriorates the yield of fresh water. Highest accumulated freshwater yield is achieved as 2.908 kg/m day during the month of May for m = 0.0833 kg/min. The accumulated freshwater yield improved by 4.23% in comparison with inclined solar still designs. Moreover, the yield is better by 3.49%-61.56% in comparison with various solar still designs. Using RSM, a polynomial statistical model is specified to estimate as well as maximize the freshwater yield of ISSB. The exergy analysis for m = 0.0833 kg/min shows a maximum hourly exergy efficiency of 6.82%.

关键词： Baffle arrangements Exergy efficiency Inclined solar still Performance yield

来源：评论

学校读者我要写书评

暂无评论

An experimental and CFD analysis of a two-phase flow air induction nozzle with agricultural application 6

An experimental and CFD analysis of a two-phase flow air ind...

引用

6th International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SIMULTECH 2016

作者： Vashahi, Foad Ra, Sothea Choi, Yong Lee, Jeekeun Mechanical System Engineering Chonbuk National University Jeonju-si Jeollabuk-do54896 Korea Republic of Agricultural Engineering Rural Development Administration Farming Automation Division Nongsaengmyeong-ro Wansan-gu Jeonju-si Jeollabuk-do560-500310 Korea Republic of Division of Mechanical System Engineering Chonbuk National University Jeonju-si Jeollabuk-do54896 Korea Republic of

ISBN: (纸本)9789897581991

The two phase flow parametric study on the air induction nozzle is presented with water and air as working fluid where liquid was supplied at the pre-orifice with various inlet pressures ranged from 3 to 6 bar. The interaction between air and water at molecular level at the orifice exit leads to forming a strong shear layer intensified with increase in inlet pressure. Mean diameter and void fraction in each bubble and their individual shapes is adjusted prior to the desired criteria. Thus, it is vital to regulate the ratio of intake air to the supplied liquid so that the generated micro bubbles fit the design criteria. CFD analysis was accompanied via commercial software STAR CCM+ from cd-Adapco and validated against experimental data to find the most appropriate turbulence model. Then, the chosen model is used to investigate design parameters and their effect on the desired parameters. A volume of fluid (VOF) method of RANS models used to undertake the air-water interaction. Results of such comparison revealed minor priority of the Realizable k-ϵ to the k-ω model. In addition, the unsteady state solution presented remarkable predictions in compare to that of steady state solution in particular predicting air behaviour. © Copyright 2016 by SCITEPRESS - Science and Technology Publications, Lda. All rights reserved.

关键词： Nozzles

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：