检索结果-内蒙古大学图书馆

2025 IEEE International Conference on Mechatronics, ICM 2025

作者： Meng, Qizhi Jiang, Ming Tang, Ruijie Kuo, Chin-Hsing Ceccarelli, Marco Takeda, Yukio Institute of Science Tokyo Department of Mechanical Engineering Tokyo Japan Tsinghua University Department of Mechanical Engineering Beijing China School of Mechanical Materials Mechatronic and Biomedical Engineering University of Wollongong Australia University of Rome Tor Vergata Department of Industrial Engineering Rome Italy

ISBN: (纸本)9798331533892

Partial loss of upper limb motor function is a typical sequela of stroke. To help such patients actively cope with daily challenges and improve their quality of life, limb functional assistances play important roles. To this end, this paper proposes a three-degree-of-freedom parallel mechanism, which can be used for human upper limb assistance. The base of the proposed mechanism is a circular track that can be attached to the waist of the human body. The mechanism consists of two chains containing parallelogram linkage, which presents good constraints for the mobile platform and facilitates the static balance design by adding springs, thereby providing reliable assistive functions and lightweight portability. The mobility of the proposed mechanism is analyzed via the screw theory, and it is verified that the mechanism generates the aimed movements. Then, the kinematic analysis of the mechanism is presented. Finally, the static balance design is carried out in detail, and the spring constants of the three added springs are calculated. The result shows that the mechanism can achieve perfect static balance. The proposed mechanism is expected to provide a potential candidate for assistive devices and be developed into a prototype providing upper limb assistance. © 2025 IEEE.

关键词： End effectors

来源：评论

学校读者我要写书评

暂无评论

Mesoporous WO3-Dot-Decorated Flexible Electrodes for the Determination of Industrial Pollutants

引用

Energy & Environmental materials 2025年第2期8卷 277-287页

作者： Aneesh Koyappayil Hyunho Seok Gwan Hyun Choi Sachin Chavan Sangho Yeon Sihoon Son Anna Go Jinhyoung Lee Keon-Woo Kim Dongho Lee Hyun-Bin Choi Hyeong-U Kim Jin Kon Kim Taesung Kim Min-Ho Lee School of Integrative Engineering Chung-Ang University SKKU Advanced Institute of Nanotechnology (SAINT) Sungkyunkwan University Materials Architecturing Research Center Korea Institute of Science and Technology (KIST) School of Mechanical Engineering Sungkyunkwan University National Creative Research Initiative Center for Hybrid Nano Materials by High-level Architectural Design of Block Copolymer Pohang University of Science and Technology (POSTECH) Department of Semiconductor Convergence Engineering Sungkyunkwan University Semicondcutor Manufacturing Research Center Korea Institute of Machinery and Materials (KIMM) Department of Nano-Mechatronics University of Science and Technology (UST)

This study demonstrates the fabrication of mesoporous tungsten trioxide（WO3）-decorated flexible polyimide（PI） electrodes for the highly sensitive detection of catechol（CC） and hydroquinone（HQ）,two environmental ***-inorganic composite dots are formed on flexible PI electrodes using evaporation-induced self-assembly（EISA） and electrospray *** EISA process is induced by a temperature gradient during electrospray,and the heated substrate partially decomposes the organic parts etched by O2plasma,creating mesoporous *** pulse voltammetry and cyclic voltammetry demonstrate a linear correlation between analyte concentration and the electrochemical *** studies support the spontaneous adsorption of CC and HQ molecules on model *** proposed sensor shows high sensitivity,a wide linear range,and a low detection limit for both individual and simultaneous determination of CC and *** sample analysis on river water confirms practical *** WO3-decorated PI electrode presents an efficient and reliable approach for detecting these pollutants,contributing to environmental safety measures.

关键词： catechol flexible sensor hydroquinone mesoporous WO3 simultaneous determination

来源：评论

学校读者我要写书评

暂无评论

Analysis of void formation and crack propagation at grain boundaries in Al-Zn-Mg-Cu alloy

引用

Keikinzoku/Journal of Japan Institute of Light Metals 2025年第2期75卷 96-102页

作者： Tsuchiya, Shota Shimizu, Kazuyuki Kamada, Yasuhiro Toda, Hiroyuki Fujihara, Hiro Hirayama, Kyosuke Koyama, Motomichi Uesugi, Masayuki Takeuchi, Akihisa Faculty of Science and Engineering Iwate University 4-3-5 Ueda Iwate Morioka-shi020-8551 Japan Faculty of Engineering Tottori University Tottori-shi Tottori Japan Department of Physical Science and Materials Engineering Iwate University Iwate Morioka-shi Japan Department of Mechanical Engineering Kyusyu University Fukuoka-shi Fukuoka Japan Department of Materials Science and Engineering Kyoto University Kyoto-shi Kyoto Japan Institute for Materials Research Tohoku University Sendai-shi Miyagi Japan Japan Synchrotron Radiation Research Institute Sayo-gun Hyogo Japan

Hydrogen embrittlement in Al-Zn-Mg-Cu alloys is suggested to originate from debonding of the η phase interface. Previous studies have shown that intragranular T phase precipitation, facilitated by increased Mg content, contributes to the mitigation of quasi-cleavage fracture. However, the role of T phase precipitation on the grain boundary in suppressing intergranular fracture remains unclear. In this study, in-situ observational techniques were used to examine the relationship between grain boundary precipitates and hydrogen-induce intergranular cracking. Obtained results showed that while the T phase precipitates in the matrix of Mg-enhanced alloy, the η phase predominates on grain boundaries, which lead intergranular fracture. The presence of numerous voids at intergranular crack tips suggests that void nucleation along grain boundaries and subsequent coalescence is the primary mechanism of crack propagation. The observed void formation at η phase interfaces is consistent with first-principles calculations and supports the concept that intergranular fracture originates from debonding at η phase interfaces. © 2025 The Japan Institute of Light Metals.

关键词： Grain boundaries

来源：评论

学校读者我要写书评

暂无评论

Atomically precise M-N-C electrocatalysts for oxygen reduction:Effects of inter-site distance,metal-metal interaction,coordination environment,and spin states

引用

Journal of Energy Chemistry 2025年第2期101卷 132-155,I0004页

作者： Junfeng Huang Saira Ajmal Anuj Kumar Jianwen Guo Mohammed Mujahid Alam Abdullah G.Al-Sehemi Ghulam Yasin School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Nano-Technology Research Laboratory Department of ChemistryGLA UniversityMathuraUttar Pradesh 281406India Department of Chemistry College of ScienceKing Khalid UniversityAbha 61413Saudi Arabia School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China State Key Laboratory of Chemical Resource Engineering College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Inspired by molecular catalysts,researchers developed atomically precise nitrogen-coordinated single or dual metal sites imbedded in graphitized carbon(M-N-C)to fully utilize metallic sites for *** catalysts performed remarkably well in the electrocatalytic oxygen reduction reaction(ORR)due to their distinct coordination and electrical structures,Nonetheless,their maximum efficacy in practical applications has yet to be *** agenda identifies tailoring the coordination environment,spin states,intersite distance,and metal-metal interaction as innovative approaches to regulate the ORR performance of these ***,it is necessary to undertake a precise assessment of these methodologies and the knowledge obtained to be implemented in the design of future M-N-C catalysts for ***,this review aims to analyze recent progress in M-N-C ORR catalysts,emphasizing their innovative engineering with aspects such as alteration in intersite distance,metal-metal interaction,coordination environment,and spin ***,we critically discuss how to logically monitor the atomic structure,local coordination,spin,and electronic states of M-N-C catalysts to modulate their ORR *** have also highlighted the challenges associated with M-N-C catalysts and proposed suggestions for their future design and fabrication.

关键词： Electrocatalysis M-N-C electrocatalysts ORR Activity descriptors Spin states

来源：评论

学校读者我要写书评

暂无评论

Slip-band-driven dynamic recrystallization mediated strain hardening in HfNbTaTiZr refractory high entropy alloy

引用

材料科学技术（英文版） 2025年第6期209卷 240-250页

作者： Long Xu Yuefei Jia Yueli Ma Yandong Jia Shiwei Wu Chao Chen Hongyu Ding Jieren Guan Xinfeng Kan Rui Wang Gang Wang Marine Equipment and Technology Institute Jiangsu University of Science and TechnologyZhenjiang 212003China Institute of Materials Shanghai UniversityShanghai 200444China Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore

Refractory high-entropy alloys(RHEAs)exhibit outstanding strength at room temperature,but their high-temperature applications are hindered by severe ***,we report slip-band-driven dy-namic recrystallization to enhance the high-temperature strain hardening of HfNbTaTiZr *** intro-ducing partial lattice defects through hot forging,we increase the nucleation sites for dynamic recrys-tallization during subsequent thermomechanical deformation,thus suppressing the strain-softening *** reveal that the high-temperature deformation is governed by the formation of heterogeneous bimodal grains along slip bands,which effectively constrain dislocation motion and improve strength,while microbands prevent premature *** fracture mode also changes from ductile to mixed to cleavage-dominated with increasing *** results demonstrate a simple and effective method for overcoming high-temperature strain-softening for BCC high entropy alloys.

关键词： Refractory high-entropy alloy High-temperature strain-softening Slip band Recrystallization

来源：评论

学校读者我要写书评

暂无评论

Spherical Magnetic Fe-Alginate Microgels Fabricated by Droplet-Microfluidics Combining with an External Crosslinking Approach and the Study of Their pH Dependent Fe^(3+) Release Behaviors

引用

Chinese Journal of Polymer science 2025年第2期43卷 289-302页

作者： Jie Chen Run-Yu Yu ai-Qi Wang Zhe-Yu Zhang Arezoo Ardekani Yuan-Du Hu Department of Materials Science and Engineering School of Physics Science and EngineeringBeijing Jiaotong UniversityBeijing100044China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of TechnologyGuangzhou510641China State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai200438China Department of Mathematics School of Mechanical EngineeringPurdue University585 Purdue MallWest LafayetteIN47907-2088USA

Due to the rapid development and potential applications of iron(Ⅲ)-alginate(Fe-Alg)microgels in biomedical as well as environmental engineering,this study explores the preparation and characterization of spherical Fe-Alg microgels using droplet microfluidics combined with an external ionic crosslinking *** study focused on the role of Fe^(3+)and examined its effects on the physical/chemical properties of microgels under different ionic conditions and reduced or oxidized *** pH-dependent release behavior of Fe^(3+)from these microgels demonstrates their potential biomedical and environmental ***,the microgels can exhibit magnetism simply by utilizing in situ oxidation,which can be further used for targeted drug delivery and magnetic separation technologies.

关键词： Fe-alginate microgels Droplet microfluidics In situ oxidation Magnetism

来源：评论

学校读者我要写书评

暂无评论

Aeroelastic Flap Free-Play Analysis Using a Harmonic Balance Approach

Aeroelastic Flap Free-Play Analysis Using a Harmonic Balance...

引用

AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： Thomas, Jeffrey P. Dowell, Earl H. Department of Mechanical Engineering and Materials Science Duke University DurhamNC27708-0300 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

Aeroelastic limit cycle oscillation results are presented for a three-degree-of-freedom plunge, pitch, and flap structural model with flap free-play in a viscous transonic flow airfoil. A nonlinear frequency domain harmonic balance approach is used for the computational model. The Newton-Raphson approach solves the governing equations, and Brodyen’s method approximates the Jacobian matrix used in the Newton-Raphson approach, significantly reducing the computational approach. The authors have previously used the harmonic balance approach to model either the unsteady aerodynamics or the unsteady structural dynamics. In this case, we are now using harmonic balance to model both the unsteady aerodynamics and the unsteady structural dynamics. A strongly nonlinear limit cycle oscillation response trend is observed. The objective is to discern the nature of the limit cycle oscillation response and determine the computational requirements for accurately modeling it. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Jacobian matrices

来源：评论

学校读者我要写书评

暂无评论

Atomic origin of minor alloying element effect on glass forming ability of metallic glass

引用

Chinese Physics B 2025年第3期34卷 483-489页

作者： Shan Zhang Qingan Li Yong Yang Pengfei Guan Beijing Computational Science Research Center Beijing 100193China Department of Mechanical Engineering College of EngineeringCity University of Hong KongTat Chee AvenueKowloon TongKowloonHong KongChina Advanced Interdisciplinary Sciences Research(AiR)Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

The glass-forming ability(GFA)of metallic glasses is a key scientific challenge in their development and application,with compositional dependence playing a crucial *** studies have demonstrated that the addition of specific minor elements can greatly enhance the GFA of parent alloys,yet the underlying mechanism remains *** this study,we use the ZrCuAl system as a model to explore how the addition of minor Al influences the crystallization rate by modulating the properties of the crystal-liquid interface,thereby affecting the *** results reveal that the minor addition of Al significantly reduces the crystal growth rate,a phenomenon not governed by particle density fluctuations at the *** impact of minor element additions extends beyond a modest increase in crystal-unfavorable motifs in the bulk supercooled *** importantly,it leads to a significant enrichment of these motifs at the crystal-supercooled liquid interface,forming a dense topological network of crystal-unfavorable structures that effectively prevent the growth of the crystalline interface and enhance *** results provide valuable insights for the design and development of high-performance metallic glasses.

关键词： metallic glass glass forming ability interface structure molecular dynamics(MD)

来源：评论

学校读者我要写书评

暂无评论

Kinetic investigation of the energy storage process in graphene fiber supercapacitors:Unraveling mechanisms,fabrications,property manipulation,and wearable applications

引用

Carbon Energy 2025年第1期7卷 133-173页

作者： Juan Zhang Wenwen Liu Minzhi Du Qingli Xu Minren Hung Ruifang Xiang Meng Liao Xinhou Wang Bingjie Wang Aiping Yu Kun Zhang Key Laboratory of Textile Science and Technology(Donghua University) Ministry of EducationCollege of TextilesDonghua UniversityShanghaiChina Department of Chemical Engineering Waterloo Institute for NanotechnologyUniversity of WaterlooWaterlooONCanada Laboratory of Advanced Materials State Key Laboratory of Molecular Engineering of PolymersDepartment of Macromolecular ScienceFudan University2205 Songhu RdShanghai 200438China College of Mechanical Engineering Donghua UniversityShanghai 201620China

Graphene fiber supercapacitors(GFSCs)have garnered significant attention due to their exceptional features,including high power density,rapid charge/discharge rates,prolonged cycling durability,and versatile weaving ***,inherent challenges in graphene fibers(GFs),particularly the restricted ion-accessible specific surface area(SSA)and sluggish ion transport kinetics,hinder the achievement of optimal capacitance and rate *** existing reviews on GFSCs,a notable gap exists in thoroughly exploring the kinetics governing the energy storage process in *** review aims to address this gap by thoroughly analyzing the energy storage mechanism,fabrication methodologies,property manipulation,and wearable applications of *** theoretical analysis of the energy storage process,specific parameters in advanced GF fabrication methodologies are carefully summarized,which can be used to modulate nano/micro-structures,thereby enhancing energy storage *** particular,enhanced ion storage is realized by creating more ion-accessible SSA and introducing extra-capacitive components,while accelerated ion transport is achieved by shortening the transport channel length and improving the accessibility of electrolyte *** on the established structure-property relationship,several critical strategies for constructing optimal surface and structure profiles of GF electrodes are *** on the exceptional flexibility and wearability of GFSCs,the review further underscores their potential as foundational elements for constructing multifunctional e-textiles using conventional textile *** conclusion,this review provides insights into current challenges and suggests potential research directions for GFSCs.

关键词： fiber-shaped supercapacitor graphene ion storage ion transport wearable application

来源：评论

学校读者我要写书评

暂无评论

Investigation of Mode I Interlaminar Fracture Toughness Recycle Carbon in Hybrid Composite

引用

Journal of Aeronautics, Astronautics and Aviation 2025年第3期57卷 557-564页

作者： Naufal, Muhammad Irfan Gan, Khong Wui Israr, Haris Ahmad Nejad, Ali Farokhi Wong, King Jye Faculty of Mechanical Engineering Universiti Teknologi Malaysia Johor Skudai81310 UTM Malaysia Smart Manufacturing and Systems Research Group University of Southampton Malaysia Johor Iskandar Puteri79100 Malaysia Department of Mechanical Materials and Manufacturing Engineering Faculty of Science and Engineering University of Nottingham Malaysia Jalan Broga Selangor Semenyih43500 Malaysia

This paper investigates the Mode I interlaminar fracture toughness of hybrid composites reinforced with recycled carbon fiber and various unidirectional fiber (glass, carbon, and flax). Specimens were tested using a mixed-mode bending jig, and crack propagation was monitored through digital image correlation (DIC). The results revealed that hybrid flax/recycled carbon composites exhibited the highest fracture toughness (1127.89 J/m2), followed by hybrid glass/recycled carbon (807.27 J/m2), and hybrid carbon/recycled carbon (741.09 J/m2). Load-displacement curves indicated significant load drops correlated with crack propagation paths observed in DIC images. Analysis suggested that crack propagation consistently occurred at the interface between the recycled carbon fiber (rCF) layers and the other fiber layers, likely due to the random orientation of the RCF and strength disparities between the fibers. Future research will explore other delamination modes and optimize fiber-matrix interfaces to enhance mechanical properties. © 2025 The Aeronautical and Astronautical Society of the Republic of China. All rights reserved.

关键词： Hybrid composites

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：