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arXiv 2023年

作者： Safavigerdini, Kaveh Nouduri, Koundinya Surya, Ramakrishna Reinhard, Andrew Quinlan, Zach Bunyak, Filiz Maschmann, Matthew R. Palaniappan, Kannappan Department of Electrical Engineering and Computer Science United States Department of Mechanical & Aerospace Engineering United States MU Materials Science and Engineering Institute University of Missouri-Columbia ColumbiaMO United States

We present a pipeline for predicting mechanical properties of vertically-oriented carbon nanotube (CNT) forest images using a deep learning model for artificial intelligence (AI)based materials discovery. Our approach incorporates an innovative data augmentation technique that involves the use of multi-layer synthetic (MLS) or quasi-2.5D images which are generated by blending 2D synthetic images. The MLS images more closely resemble 3D synthetic and real scanning electron microscopy (SEM) images of CNTs but without the computational cost of performing expensive 3D simulations or experiments. mechanical properties such as stiffness and buckling load for the MLS images are estimated using a physics-based model. The proposed deep learning architecture, CNTNeXt, builds upon our previous CNTNet neural network, using a ResNeXt feature representation followed by random forest regression estimator. Our machine learning approach for predicting CNT physical properties by utilizing a blended set of synthetic images is expected to outperform single synthetic image-based learning when it comes to predicting mechanical properties of real scanning electron microscopy images. This has the potential to accelerate understanding and control of CNT forest self-assembly for diverse applications. Copyright © 2023, The Authors. All rights reserved.

关键词： Carbon nanotubes

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Continual driver behaviour learning for connected vehicles and intelligent transportation systems: Framework, survey and challenges

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Green Energy and Intelligent Transportation 2023年第4期2卷 69-80页

作者： Zirui Li Cheng Gong Yunlong Lin Guopeng Li Xinwei Wang Chao Lu Miao Wang Shanzhi Chen Jianwei Gong Chair of Traffic Process Automation “Friedrich List”Faculty of Transport and Traffic SciencesTU Dresden01069 DresdenGermany School of Mechanical Engineering Beijing Institute of Technology100081 BeijingChina Transport and Planning Civil Engineering and GeosciencesDelft University of Technology2628 CD Delft School of Engineering and Materials Science Queen Mary University of LondonE14NS LondonUK Baidu Inc Beijing 100085China State Key Laboratory of Wireless Mobile Communications China Information and Communication Technology Group Co.Ltd.(CICT)China

Modelling,predicting and analysing driver behaviours are essential to advanced driver assistance systems(ADAS)and the comprehensive understanding of complex driving ***,with the development of deep learning(DL),numerous driver behaviour learning(DBL)methods have been proposed and applied in connected vehicles(CV)and intelligent transportation systems(ITS).This study provides a review of DBL,which mainly focuses on typical applications in CV and ***,a comprehensive review of the state-of-the-art DBL is ***,Given the constantly changing nature of real driving scenarios,most existing learning-based models may suffer from the so-called“catastrophic forgetting,”which refers to their inability to perform well in previously learned scenarios after acquiring new *** a solution to the aforementioned issue,this paper presents a framework for continual driver behaviour learning(CDBL)by leveraging continual learning *** proposed CDBL framework is demonstrated to outperform existing methods in behaviour prediction through a case ***,future works,potential challenges and emerging trends in this area are highlighted.

关键词： Driver behaviours Connected vehicles Continual learning Machine learning Intelligent transportation systems

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Surface roughening of Nafion membranes using different route planning for IPMCs

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International Journal of Smart and Nano materials 2020年第2期11卷 117-128页

作者： Liang Yang Dongsheng Zhang Xining Zhang Aifen Tian Yifan Ding School of Mechanical Engineering Xi’an Jiaotong UniversityXi’anChina School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’anChina

In this paper,three different roughening route planning methods(free coarsening,vertical coarsening,circling coarsening)were designed to pre-treat the basement *** platinum IPMC was prepared by electroless plating to observe their surface morphology and test their performances such as output displacement and blocking *** results show that the platinum electrode of the vertical coarsening route planning of IPMC is distributed in the shape of fish scales and is the most compact and regular on the surface *** thickness of the platinum electrode layer is about 13μm,the maximum output displacement is 54.89 mm,the blocking force of 15.46 mN,and the maximum strain energy density of the IPMC of 2.44 KJ/m^(3).Vertical coarsening route planning can significantly improve the electrodynamic properties of IPMC,and it is recommended that the surface roughening of IPMC be utilized in the research and application of *** lays a certain experimental foundation for the performance improvement and innovation research and development of IPMC in the subsequent stage.

关键词： Intelligent materials IPMC surface coarsening micromorphology actuation property

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Preface to the fifth edition

Solid Mechanics and its Applications

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Solid Mechanics and its Applications 2022年 264卷 vii页

作者： Dowell, Earl H. Department of Mechanical Engineering and Materials Science Duke University DurhamNC United States

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An angle-insensitive electromagnetic absorber enabling a wideband absorption

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Journal of materials science & Technology 2022年第18期113卷 33-39页

作者： Zhichao Lou Qiuyi Wang Xiaodi Zhou Ufuoma I.Kara Rajdeep S.Mamtani Hualiang Lv Meng Zhang Zhihong Yang Yanjun Li Chenxuan Wang Solomon Adera Xiaoguang Wang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037China Willian G.Lowrie Department of Chemical and Biomolecular Engineering The Ohio State UniversityColumbusOH43210United States of America Institute of Materials Research and Engineering Agency for SciencesTechnology and ResearchSingapore State Key Laboratory of Medical Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical SciencesSchool of Basic Medicine Peking Union Medical CollegeBeijing 100005China Department of Mechanical Engineering University of MichiganAnn ArborMI48109United States of America Sustainability Institute The Ohio State UniversityColumbusOH43210United States of America School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China

Electromagnetic(EM)wave absorbers with wideband absorption capability are proposed as a strategy to mitigate environmental pollution by EM ***,designing an EM absorber with its performance capacity independent of the EM wave incident angle remains elusive to *** this challenge requires development of EM absorbers whose EM absorption performance is insensitive to the EM wave incident ***,we synthesized EM absorbers with a variety of structures with different symme-tries(including micro-/nanospheres,nanoflakes and nanotubes)to study the effect of the EM absorbers’structure and the EM wave incident angle on the EM absorption *** analysis reveals that non-magnetic EM absorbers with spatially symmetric nanostructures exhibit excellent EM wave incident ***,we demonstrate that a class of non-magnetic EM absorbers made from bam-boo derived-carbon nanospheres exhibit EM incident angle-insensitivity and wideband EM absorption performance with an effective absorption band up to 3.5 GHz when the thickness is 1.4 mm,a signif-icant improvement from prior studies which used thicknesses as high as 3-4 mm for comparable EM absorption performance.

关键词： Nanostructure Angle-insensitive EM absorption Biomass derived carbon Wideband

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Improvement of formability of silicon-containing recycled wrought aluminium by hot stamping after rapid heating 28

Improvement of formability of silicon-containing recycled wr...

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28th Congress of the International Federation for Heat Treatment and Surface engineering, IFHTSE 2023

作者： Kawana, Ryohei Hirosawa, Shoichi Ootaki, Mitsuhiro Maeno, Tomoyoshi Suzuki, Yasushi Yabuki, Yuuji Department of Mechanical Engineering and Materials Science Yokohama National University 79-5 Tokiwadai Hodogaya-ku Kanagawa Yokohama240-8501 Japan G-tekt Corporation 4-8-41 Shinmeidai Hamura Tokyo205-0023 Japan

ISBN: (纸本)9781713889533

In this study, Al-Si binary alloys of Al-3%Si, Al-7%Si and Al-12%Si were cast, homogenized and cold-rolled at a reduction ratio of 80%, and then the mechanical properties were evaluated by tensile tests at room temperature. Irrespective of Si content, ultimate tensile strength of the cold-rolled specimens reached 200-210 MPa, although elongation to fracture decreased with increasing Si content. SEM microstructures suggested that the coarsened Si particles are deformed by cold rolling, and then the edges of broken Si particles act as starting points of crack generation, resulting in the earlier fracture of Al-7%Si and Al-12%Si alloys. On the formability of the cold-rolled specimens, on the other hand, Al-3%Si and Al-7%Si alloys were both successfully V-bent with a bending radius of 9 mm, indicating that the amount of Si particles has less influence on the degradation of formability. However, V-bending of more Si particle containing Al-12%Si alloy could not be accomplished at room temperature, and therefore rapid heating to 250°C became quite effective for improving the formability of Al-12%Si alloy as well as a commercial A4032-T6 alloy. The effectiveness of such a hot stamping method was clarified even in the case of a bending radius of 2 mm;i.e. Al-3%Si alloy can be V-bent at room temperature, whereas rapid heating to 250, 300 and 350°C are needed for Al-7%Si, Al-12Si and A4032-T6 alloys, respectively. Therefore, it was revealed that higher Si content as well as some alloy elements (e.g. Cu and Mg) degrades the formability of Al-Si alloys, but rapid heating before hot stamping can improve the formability of recycled wrought aluminum. © 2023 28th IFHTSE 2023 Congress. All rights reserved.

关键词： Aluminum alloys

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Influence of Welding Parameters and Post Weld Heat Treatment on mechanical and Corrosion Behaviour of Friction Stir Welded Aluminium Alloys

SSRN

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SSRN 2024年

作者： Abolusoro, Olatunji Peter Khoathane, Moshibudi Caroline Mhike, Washington Omoniyi, Peter Kailas, Satish V. Akinlabi, Esther T. Department of Chemical Metallurgical and Materials Engineering Tshwane University of Technology Staatsartillerie Road Philip Nel Park Pretoria Postal code Pretoria0183 South Africa Department of Mechanical Engineering Landmark University Omu-Aran Nigeria Department of Mechanical Engineering University of Ilorin Ilorin Nigeria Department of Mechanical Engineering Indian Institute of Science Bangalore India Department of Mechanical and Construction Engineering Northumbria University Newcastle United Kingdom

A study on how corrosion and mechanical characteristics of friction stir welded joints are affected by processing parameters employed during the welding and the post-weld heat treatment administered on the welded materials have been reported in this paper. This study specifically investigated the effects of variable parameters such as the tool rotational and welding speeds and the post-weld heat treatment on the mechanical and corrosion behaviour of the friction stir welded dissimilar AA6101-T6 and AA7075-T651 Aluminium Alloys. The welded samples were characterized through the evolving microstructure and mechanical characteristics. The results show that the tensile strength of the joints decreases from 154 MPa to 144 MPa when the rotational speed increases from 950 rpm to 1550rpm. However, the tensile strength increases from 138 MPa to 154 MPa with an increase in the welding speed from 20 mm/min to 110 mm/min. This is due to high heat input at higher rotational speed which weakens the bonding strength at the joints. The corrosion behaviour were observed to differ at different parameters. The corrosion inhibition efficiency was highest at a rotational speed of 950 rpm, welding speed of 65 mm/min, and lowest at 950 rpm and 20 mm/min. It was observed that the Post-Weld Heat Treatment (PWHT) process enhanced the mechanical properties due to improvement in grain refinement but lowered the corrosion resistance. This study is significant as it informs the basis for optimization of processing parameters and post weld heat treatment for dissimilar aluminium alloys for the grades considered in this study. © 2024, The Authors. All rights reserved.

关键词： Friction stir welding

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Mo-terminated edges in two-dimensional molybdenum disulfide for site-specific hydrolysis and DNA cleavage

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materials Today 2025年 86卷 162-171页

作者： Wang, Cong Wu, Menghan Li, Muqing Zhao, Yingcan Zhao, Mingchuang Zhang, Yunhao Bai, Yichao Gao, Jianxiang Wang, Xiaoxia Tian, Xilin Zhang, Han Chang, Liang Zou, Xiaolong Liu, Bilu Kang, Feiyu Terrones, Mauricio Lei, Yu Institute of Materials Research Shenzhen Key Laboratory of Advanced Layered Materials for Value-added Applications Guangdong Provincial Key Laboratory of Thermal Management Engineering and Materials & Center of Double Helix Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Institute of Materials Research & Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Advanced Layered Materials for Value-added Applications Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Environmental Science Program Department of Life Sciences Beijing Normal University-Hong Kong Baptist University United International College Guangdong519087 China Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China Department of Physics Department of Chemistry Department of Materials Sciences Center for 2-Dimensional and Layered Materials The Pennsylvania State University University ParkPA16802 United States International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics Shenzhen University Shenzhen518060 China

The hydrolysis of DNA serves as the foundational principle for gene engineering that enable precise gene cleavage at the molecular level. This process typically occurs in biological nucleases, which exhibit nucleobase-selective and catalytic hydrolysis capabilities rarely replicated in abiotic nanomaterials. Here, we demonstrate that molybdenum-terminated (Mo-terminated) edges of molybdenum disulfide (MoS2) possess the unique ability to abstract a proton (H+) from water molecules, thereby facilitating catalytic hydrolysis reactions that cleave the phosphodiester bonds in DNA through the action of hydroxide ions. The enhanced proton absorption at Mo-terminated edges of MoS2 significantly reduces the activation energy required for the DNA hydrolysis reaction. Furthermore, the favorable interaction between the Mo-terminated edges and thymine nucleobases promotes both charge transfer and P-O bond cleavage, enabling targeted DNA hydrolysis at 'TTTTTTT' sequences under dark conditions. This discovery underscores the potential of MoS2 as a stable, efficient nanosystem for precise genetic editing, heralding advanced applications in the field of gene engineering. © 2025 The Author(s)

关键词： Activation energy

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2D/2D Heterostructures:Rational Design for Advanced Batteries and Electrocatalysis

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Energy & Environmental materials 2022年第1期5卷 115-132页

作者： Jun Mei Ting Liao Ziqi Sun School of Chemistry and Physics Queensland University of Technology2 George StreetBrisbane Qld 4000Australia School of Mechanical Medical and Process Engineering Queensland University of Technology2 George StreetBrisbane Qld 4000Australia Centre for Materials Science Queensland University of Technology2 George StreetBrisbane Qld 4000Australia

Two-dimensional/two-dimensional(2D/2D)heterostructures consisting of two or more 2D building blocks possess intriguing electronic features at the nanosized interfacial regions,endowing the possibility for effectively modulating the confinement,and transport of charge carriers,excitons,photons,phonons,*** bring about a wide range of extraordinary physical,chemical,thermal,and/or mechanical *** rational design and synthesis of 2D/2D heterostructures,electrochemical properties for advanced batteries and electrocatalysis can be well regulated to meet some practical *** this review,a summary on the commonly employed synthetic strategies for 2D/2D heterostructures is first given,followed by a comprehensive review on recent progress for their applications in batteries and various electrocatalysis ***,a critical outlook on the current challenges and promising solutions is presented,which is expected to offer some insightful ideas on the design principles of advanced 2D-based nanomaterials to address the current challenges in sustainable energy storages and green fuel generations.

关键词： 2D heterostructures 2D nanomaterials battery electrocatalysis energy storage

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Effect of grain boundary diffusion of terbium on mode of mechanical fracture of sintered NdFeB magnets

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Journal of Rare Earths 2024年第4期42卷 696-704页

作者： Zexin Lu Tinghui Wang Jianjun Jiang Bizhang Zheng Lijing Yang Xingqi He Anli Lin Shengzhi Dong Zhenlun Song CAS Key Laboratory of Magnetic Materials and Devices Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China Faculty of Mechanical Engineering and Mechanics Ningbo UniversityNingbo315211China Ningbo Xinqi Precision Magnetism Steel Co. Ltd..Ningbo315156China Center for Advanced Measurement Science National Institute of MetrologyBeijing102200China Division of Functional Materials Central Iron&Steel Research InstituteBeijing100081China

Grain boundary diffusion process(GBDP)is a widely used method of increasing the coercivity of sintered NdFeB *** this study,the effects of the GBDP on the bending strength and microhardness of sintered NdFeB magnets and the fracture mode were *** show that the bending strength of magnets is reduced by pickling and heat treatment and greatly recove rs after heavy rare earth element(Tb)grain boundary *** pickling and the heat treatment cause a slight decrease in *** with the recovery of the bending strength,the hardness decreases after the *** fracture mode of bended magnets changes from intergranular to *** study helps in further improving the mechanical and magnetic properties of sintered NdFeB magnets.

关键词： Sintered NdFeB magnets Grain boundary diffusionprocess Bending strength Heavy rare earth element Coercivity

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