检索结果-内蒙古大学图书馆

Acta Mechanica Solida Sinica 2023年第4期36卷 594-601页

作者： Jian Wang Yumei Zhou Lanying Xu Lelun Jiang Liu Wang School of Mechatronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument School of Biomedical EngineeringSun Yat-sen UniversityGuangzhou 510006China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230026China

Magnetic kirigami with tunable configurations under magnetic actuation is of significant interest in various emerging ***,there remains a grand challenge to develop magnetic kirigami with a facile fabrication strategy,programmable mag-netization,and *** this work,we present a novel magnetic kirigami that is readily fabricated by the laser cutting *** magnetic kirigami consists of an array of magnetic microplates,each with a programmed *** applying an actuation magnetic field,each microplate can rotate and even flip,allowing for predesigned kirigami *** further coating the surface of the microplate array,the magnetic kirigami can be programmed with *** demonstrate a potential application of information encryption by engineering magnetic kirigami into a magneto-responsive QR *** a simple fabrication strategy,our work paves the way for other applications of magnetic kirigami.

关键词： Magnetic kirigami Laser cutting Magnetic actuation

来源：评论

学校读者我要写书评

暂无评论

A highly efficient and eco-friendly recycling process for the separation and purification of components from used photovoltaic panels

A highly efficient and eco-friendly recycling process for th...

引用

2024 International Conference on Optoelectronic materials and Devices, ICOMD 2024

作者： Zhan, Jialin Zhang, Zuosheng Zhou, Fujing Hu, Jian Department of Intelligent Manufacturing Anhui Vocational and Technical College Hefei China Department of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing China School of Mechanical Engineering Chaohu University Hefei China

ISBN: (数字)9781510689046

ISBN: (纸本)9781510689039

The paper employs two methods, pyrolysis and physical crushing, to pretreat discarded photovoltaic modules, dividing the solar cells into "cell particles" and "powder" components. The composition of elements in the cells is determined using SEM-EDS, and a preliminary quantitative analysis of the components of crystalline silicon solar cells is conducted. Dissolution experiments are performed on the pretreated cells, using sodium hydroxide to leach aluminum and dissolve silicon nitride, and using nitric acid to dissolve the carbon in the cells. EDS is used to detect the elemental content after the chemical experiments. The results show that a combined method of pyrolysis and chemical methods achieves a silicon extraction rate of 81.6%, effectively realizing the separation and purification of silicon from used photovoltaic panels. © 2025 SPIE.

关键词： Silicon nitride

来源：评论

学校读者我要写书评

暂无评论

Influence of surface modification technique on the properties of jute – Sisal fibre filled epoxy composites

引用

materials Today: Proceedings 2022年 65卷 2578-2580页

作者： Nigrawal, Archana Kumar Sharma, Arun Haque, Fozia Z. Optical Nano Materials Lab Department of Physics Maulana Azad National Institute of Technology India Department of Mechanical Engineering Laxmipati Institute of Science and Technology India

Natural fibers have gain a lot of consciousness as potential alternative for the substitution of man-made fibers, as reinforcement of a range of resins for highly developed application as they are having little density, renewable, sustainable, and eco-friendly. Throughout processing, natural fibers are not having any harmful effects and are not coarse to the dispensation apparatus. In this paper hybrid composite by using jute fibre and sisal fibre reinforced with epoxy resin has been prepared and their mechanical properties and dc conductivity have been measured. Measurements have been conducted on the hybrid composites by using Electrometer. It is observed that the hybrid composite having unidirectional orientation of jute fibre and sisal fibre gives better mechanical properties. It was observed that the surface treatment of fibres eliminates some quantity of lignin, wax and oils on both sides of the cell wall of the fibres and the alteration of certain amount of alpha to beta cellulose. Due to these changes there is an improvement in tensile strength of the composites and increase in conductivity was also observed. © 2022

关键词： Jute fibers

来源：评论

学校读者我要写书评

暂无评论

Application of Chaotic Encryption and Decryption in Wireless Transmission From Sensory Toolholders on Machine Tools

引用

IEEE Sensors Journal 2023年第11期23卷 11453-11468页

作者： Lin, Chi-Yuan Wu, Shu-Cing Kuo, Ping-Huan Huang, Meng-Jun Hong, Song-Wei Yau, Her-Terng National Chin-Yi University of Technology Department of Electronic Engineering Taichung411030 Taiwan National Chin-Yi University of Technology Prospective Technology of Electrical Engineering and Computer Science Program Taichung411030 Taiwan Chiayi62102 Taiwan National Chung Cheng University Department of Mechanical Engineering Chiayi62102 Taiwan

In recent years, several industries have increased their demand for processing precision, automatic detection, and visualization interfaces. Therefore, to keep pace with the fourth industrial revolution, machine tool operators install a large number of sensors on machine tools to obtain more precise physical quantities during processing and use a variety of sensors to obtain measurements in various situations. However, these additional sensors on machine tools result in complicated wire layouts, which exhibit negative effects on processing. Such problems lead to the birth of wireless data transmission, which is expected to become the new standard in the future. At present, there is more and more interactive integration between relevant embedded system and the machine tool, which allows information communication between each other in the wireless domain. However, generally, the majority of machine tool operators focus on optimizing the sensing conditions during processing, but they disregard the importance of information security. In the current era of the Internet of Things (IoT), information security is regarded as a crucial factor. For the wireless communication between the IoT equipment for each machine in the machining field, the transmitted data are almost exposed within public space directly due to the loss in constraint and protection of physical wiring. Therefore, such a process can easily be intercepted by other devices that capture information on relevant status of the machine or command messages received by the controller, where intentional individual may possibly control the operating mechanism and progress of entire plant. This leads to theft of relevant secrets in manufacturing technology for the subject company, or intentional shutdown, machine damage, and vicious blackmailing attacks. Therefore, introducing the mechanism of safety protection during wireless signal transmission is an inevitable technology to maintain the company interests and also the

关键词： Synchronization

来源：评论

学校读者我要写书评

暂无评论

Development of exosome membrane materialsfused microbubbles for enhanced stability and efficient drug delivery of ultrasound contrast agent

引用

Acta Pharmaceutica Sinica B 2023年第12期13卷 4983-4998页

作者： Yongho Jang Jeehun Park Pilsu Kim Eun-Joo Park Hyungjin Sun Yujin Baek Jaehun Jung Tai-kyong Song Junsang Doh Hyuncheol Kim Department of Chemical and Biomolecular Engineering Sogang UniversitySeoul 04107Republic of Korea Research Institute of Advanced Materials(RIAM) Institute of Engineering ResearchSeoul National UniversitySeoul 08826Republic of Korea Department of Electronic Engineering Sogang UniversitySeoul 04107Republic of Korea Biomedical Research Institute&Department of Radiology Seoul National University HospitalSeoul 03080Republic of Korea Interdisciplinary Program in Bioengineering Seoul National UniversitySeoul 08826Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Institute of Engineering Research Bio-MAX InstituteSeoul National UniversitySeoul 08826Republic of Korea Department of Biomedical Engineering Sogang UniversitySeoul 04107Republic of Korea

Lipid-coated microbubbles are widely used as an ultrasound contrast agent,as well as drug delivery ***,the two main limitations in ultrasound diagnosis and drug delivery using microbubbles are the short half-life in the blood system,and the difficulty of surface modification of microbubbles for active *** exosome,a type of extracellular vesicle,has a preferentially targeting ability for its original *** this study,exosome-fused microbubbles(Exo-MBs)were developed by embedding the exosome membrane proteins into *** a result,the stability of Exo-MBs is improved over the conventional *** the same principle that under the exposure of ultrasound,microbubbles are cavitated and self-assembled into nano-sized particles,and Exo-MBs are self-assembled into exosome membrane proteins-embedded nanoparticles(Exo-NPs).The Exo-NPs showed favorable targeting properties to their original cells.A photosensitizer,chlorin e6,was loaded into Exo-MBs to evaluate therapeutic efficacy as a drug *** higher therapeutic efficacy of photodynamic therapy was confirmed,followed by cancer immunotherapy from immunogenic cell *** have therefore developed a novel ultrasound image-guided drug delivery platform that overcomes the shortcomings of the conventional ultrasound contrast agent and is capable of simultaneous photodynamic therapy and cancer immunotherapy.

关键词： Exosomes Microbubbles Photodynamic therapy Ultrasound Sonoporation Cancer immunotherapy Drug delivery

来源：评论

学校读者我要写书评

暂无评论

Deciphering theαrelaxation and the anelastic-to-plastic transition in the deep glassy state

引用

science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 131-138页

作者： Qi Hao Guanghui Xing Eloi Pineda Claudio Fusco Laurent Chazeau Jean-Marc Pelletier Yunjiang Wang Yong Yang Jichao Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710072China Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarcelona08019Spain Univ Lyon INSA LyonUniversitéClaude Bernard Lyon 1CNRSMATEISUMR5510Villeurbanne69621France State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China Department of Mechanical Engineering College of EngineeringCity University of Hong KongHong Kong999077China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongHong Kong999077China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Northwestern Polytechnical UniversityXi’an710072China Key Laboratory of Aircraft Structural Integrity Ministry of Industry and Information TechnologyXi’an710072China

In contrast to their conventional crystalline counterparts,amorphous solids exhibit diverse dynamic relaxation mechanisms under external *** challenge to understanding their behavior lies in unifying microscopic dynamics,relaxation,and macroscopic *** study establishes a potential link by quantifying the characteristic time of the anelastic-to-plastic transition through dynamic mechanical relaxation and stress relaxation tests across a wide temperature range in both the supercooled liquid and the glassy *** is found that the stress relaxation time in the glassy solids follows an Arrhenius relationship,aligning with the mainαrelaxation time,and unveils a finding:αrelaxation continues to govern deformation even below the glass transition,challenging previous assumptions of the role of secondaryβrelaxation.A hierarchically constrained atomic dynamics model rationalizes the temperature dependence ofαrelaxation and the transition fromβtoαrelaxation,also providing evidence that the stretched exponent in the Kohlrausch-Williams-Watts equation can serve as an order *** work highlights the role ofαrelaxation in the glassy state and contributes to elucidating the potential correlation between relaxation and deformation in amorphous materials.

关键词： dynamic relaxation nonelastic deformation metallic glasses aging

来源：评论

学校读者我要写书评

暂无评论

State-of-the-art advances in vacancy defect engineering of graphitic carbon nitride for solar water splitting

引用

Journal of Semiconductors 2023年第8期44卷 16-34页

作者： Jie Li Kaige Huang Yanbin Huang Yumin Ye Marcin Ziółek Zhijie Wang Shizhong Yue Mengmeng Ma Jun Liu Kong Liu Shengchun Qu Zhi Zhao Yanjun Zhang Zhanguo Wang College of Mechanical and Electrical Engineering Handan UniversityHandan 056005China Hebei International Joint Research Center for Computational Optical Imaging and Intelligent Sensing Hebei International Joint Research Center for Computational Optical Imaging and Intelligent SensingSchool of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandan 056038China Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices Beijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Materials Science and Engineering Faculty of Materials Science and Chemical EngineeringNingbo UniversityNingbo 315211China Faculty of Physics Adam Mickiewicz University Poznan61-614 PoznanPoland Guangdong-Hong Kong Joint Laboratory for Water Security Engineering Research Center of Ministry of Education on Groundwater Pollution Control and RemediationCenter for Water ResearchAdvanced Institute of Natural SciencesBeijing Normal University at ZhuhaiZhuhai 519087China

Developing low-cost,efficient,and stable photocatalysts is one of the most promising methods for large-scale solar water *** a metal-free semiconductor material with suitable band gap,graphitic carbon nitride(g-C_(3)N_(4))has attracted attention in the field of photocatalysis,which is mainly attributed to its fascinating physicochemical and photoelectronic ***,several inherent limitations and shortcomings—involving high recombination rate of photocarriers,insufficient reaction kinetics,and optical absorption—impede the practical applicability of g-C_(3)N_(4).As an effective strategy,vacancy defect engineering has been widely used for breaking through the current limitations,considering its ability to optimize the electronic structure and surface morphology of g-C_(3)N_(4) to obtain the desired photocatalytic *** review summarizes the recent progress of vacancy defect engineered g-C_(3)N_(4) for solar water *** fundamentals of solar water splitting with g-C_(3)N_(4) are discussed *** then focus on the fabrication strategies and effect of vacancy generated in g-C_(3)N_(4).The advances of vacancy-modified g-C_(3)N_(4) photocatalysts toward solar water splitting are discussed ***,the current challenges and future opportunities of vacancy-modified g-C_(3)N_(4) are *** review aims to provide a theoretical basis and guidance for future research on the design and development of highly efficient defective g-C_(3)N_(4).

关键词： g-C_(3)N_(4) vacancy defect water splitting photocatalyst charge carrier

来源：评论

学校读者我要写书评

暂无评论

Combining Machine Learning, DFT, EFM, and Modeling to Design Nanodielectric Behavior 241

Combining Machine Learning, DFT, EFM, and Modeling to Design...

引用

241st ECST Meeting

作者： Schadler, Linda S Chen, Wei Brinson, L. Catherine Sundararaman, Ravishankar Prabhune, Prajakta Iyer, Akshay Department of Mechanical Engineering University of Vermont BurlingtonVT05405 United States Department of Materials Science and Engineering Rensselaer Polytechnic Institute 12180 United States Department of Mechanical Engineering and Materials Science Duke University DurhamNC27708 United States Department of Mechanical Engineering Northwestern University EvanstonIL60208 United States

ISBN: (纸本)9781607685395

Predicting and designing the properties of polymer nanodielectrics is challenging due to the number of parameters controlling properties and the breadth of scale (from electronic to mm). This paper summarizes a preliminary study using elongated semiconducting nanoparticles with an extrinsic interface that enhanced carrier trapping to attempt to find a parameter space that allows for improved permittivity and breakdown strength without increasing loss. We combine finite element modeling of dielectric constant with a Monte Carlo multi-scale simulation of carrier hopping to predict break down strength. Filler dispersion, filler geometry, isotropy and interface trapping properties are explicitly taken into account to compute design objectives associated with dielectric constant and mobility. Ultimately, we trained a latent variable Gaussian Process (LVGP) metamodel that can take both qualitative (e.g., orientation and dispersion states) and quantitative variables (e.g., microstructure descriptors) as inputs to predict properties over a broader range with observed tradeoffs. © 2022 ECS - The Electrochemical Society.

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

Ultralow friction polymer composites incorporated with mono-dispersed oil microcapsules

引用

Friction 2021年第1期9卷 29-40页

作者： Lin ZHANG Guoxin XIE Shuai WU Shiguang PENG Xiaoqing ZHANG Dan GUO Shizhu WEN Jianbin LUO State Key Laboratory of Tribology Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Mechanical Engineering Beijing Technology and Business UniversityBeijing 100048China

Ultralow friction polymer composites were prepared by adding oil-loaded microcapsules into epoxy(EP)***-dispersed polystyrene(PS)/poly alpha olefin(PAO)microcapsules with a diameter of~2μm and a shell thickness of~30 nm were prepared by solvent evaporation method in an oil-in-water *** lubrication behaviors of the EP resin composites with oil-loaded microcapsules have been investigated under different loads and sliding *** compared with the pure EP resin,the friction coefficient of the composite could be reduced to 4%(from 0.71 to 0.028)and the wear rate could be decreased up to two orders of *** was demonstrated that the released PAO oil from the microcapsules during the friction process produced a boundary lubricating film,which could prevent the direct contact of two rubbing surfaces,and thus leading to an extremely low friction coefficient and wear ***,the composites with microcapsules could achieve comparable lubrication properties to the case under the external lubrication condition,while the former case could effectively minimize the lubricant leakage and improve the lubrication efficiency.

关键词： polymer composite microcapsules solvent evaporation ultralow friction boundary lubrication

来源：评论

学校读者我要写书评

暂无评论

Low-density diamondlike amorphous carbon at nanostructured metal-diamond interfaces

引用

Physical Review materials 2024年第9期8卷 096001页

作者： Brendan McBennett Yuka Esashi Nicholas W. Jenkins Albert Beardo Yunzhe Shao Emma E. Nelson Theodore H. Culman Begoña Abad Michael Tanksalvala Travis D. Frazer Samuel Marks Weilun Chao Sadegh Yazdi Joshua L. Knobloch Henry C. Kapteyn Margaret M. Murnane Department of Physics Materials Science and Engineering Center for X-Ray Optics Renewable and Sustainable Energy Institute and the Materials Science & Engineering Program 4775 Walnut Street #102 Boulder Colorado 80309 USA

Next-generation nanoelectronic, energy, and quantum technologies require increasingly stringent thermal, optical, mechanical, and electrical properties of component materials, often surpassing the limits of widely used materials such as silicon. Diamond, an ultrawide bandgap semiconductor, is a promising material for these applications because of its very high stiffness, thermal conductivity, and electron mobility. However, incorporating diamond into devices that require high-quality metal-diamond interfaces is challenging. In this work, we use a suite of electron microscopy measurements to reveal an ultrathin amorphous carbon layer that emerges at metal-diamond interfaces after electron beam lithography. Using extreme ultraviolet scatterometry, we nondestructively determine lower bounds on the layer's Young's modulus and thermal conductivity, which at >230GPa and >1.1 W/(mK) are indicative of a diamondlike form of amorphous carbon with high sp3 bonding. However, extreme ultraviolet coherent diffractive imaging reflectometry and energy-dispersive x-ray spectroscopy measurements indicate a low and likely inhomogeneous density in the range of 1–2g/cm3. The low density of such a stiff and conductive layer could indicate that it contains nanometer-scale voids or atomic-scale vacancies. The appearance of this unusual layer illustrates the nanofabrication challenges for diamond and highlights the need for better techniques to characterize surfaces and interfaces in nanoscale devices.

关键词： Amorphous materials Diamond Interfaces Thin films Electron energy loss spectroscopy Energy-dispersive x-ray spectroscopy High-harmonic generation Ultrafast femtosecond pump probe X-ray reflectivity

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：