检索结果-南通市图书馆

Transfer or blockage:Unraveling the interaction between deformation twinning and grain boundary in tantalum under shock loading with molecular dynamics

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第25期156卷 118-128页

作者： Z.C.Meng M.M.Yang A.H.feng S.J.Qu F.Zhao L.Yang J.H.Yao Y.Yang Q.B.fan H.Wang Interdisciplinary Centre for Additive Manufacturing (ICAM) School of Materials and ChemistryUniversity of Shanghai for Science and TechnologyShanghai 200093China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China School of Materials Science and Engineering Tongji UniversityShanghai 201804China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China National Key Laboratory of Science and Technology on Materials Under Shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401135China

The interaction between{112}deformation twinning and grain boundary in coaxial polycrystalline tantalum under shock compression was studied with molecular dynamics simulation under different grain pair misorientation angles(MA)and geometric compatibility factor(m’).Generally,in the coaxial polycrystal,the value of MA determines the occurrence of twin transfer(TT)or twin blockage(TB),i.e.,twin transfer occurs at MA≤29°with twin blockage otherwise.Under TT,the value of m’affects the selection of twin variants.,i.e.,the twin system with a larger m’is easier to active.The morphology of twin pairs is ruler-shaped and lenticular under TT and TB,respectively,with different thickening mechanisms,including grain boundary dislocation emission.

关键词： Plasticity Grain boundary Twin Atomistic simulation Tantalum

The 12 february 2013 North Korean Underground Nuclear Test

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The 12 February 2013 North Korean Underground Nuclear Test

腰椎间盘高信号区(HIZ)是否一定代表纤维环破裂?

中国科学院地质与地球物理研究所2014年度（第14届）...

作者： L.-F.Zhao X.-B.Xie W.-M.Wang Z.-X.Yao Key Laboratory of the Earth’s Deep Interior Institute of Geology and Geophysics Chinese Academy of Sciences Institute of Geophysics and Planetary Physics University of California at Santa Cruz Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau Research Chinese Academy of Sciences

Online Material:figures of Pn waveform comparisons and spectral ratios;tables of Pn differential times and parameters for events used in the study.INTRODUCTION On 12 february 2013,North Korea conducted its third and the largest nuclear test to date in the China–North Korea border area.According to local news,people living in nearby

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

国际医学放射学杂志 2017年第3期 360-360页

作者： Z.Shan H.Chen J.Liu H.Ren X.Zhang F.Zhao 孙海涛 Department of Orthopaedics Sir Run Run Shaw Hospital School of Medicine Zhejiang University

摘要目的研究MR矢状面T;WI、T;WI的高信号区（HIZ）的特征,明确其原因。材料与方法纳入73例具有下腰痛及HIZ（于T;WI确认）的病人,年龄25;0岁（平均51岁）,将其分为2组,"单序列HIZ组"定义只在T;WI上显示HIZ,"双序列HIZ组"则在T;WI和T;W... 详细信息

摘要目的研究MR矢状面T;WI、T;WI的高信号区（HIZ）的特征,明确其原因。材料与方法纳入73例具有下腰痛及HIZ（于T;WI确认）的病人,年龄25;0岁（平均51岁）,将其分为2组,"单序列HIZ组"定义只在T;WI上显示HIZ,"双序列HIZ组"则在T;WI和T;WI上均显示HIZ。将手术切除的组织与HIZ相对应的组织进行分析。结果共研究了82个椎间盘,39例病人显示椎间盘后纤维环单序列HIZ,30例病人显示双序列HIZ,4例病人单序列HIZ和双序列

关键词： HIZ 高信号区纤维环

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

MR成像能用于预测软组织肉瘤的分级吗?

国际医学放射学杂志 2014年第5期 476-476页

作者： F.Zhao S.Ahlawat S.J.farahani K.L.Weber E.A.Montgomery J.A.Carrino 孔祥 Shandong Medical Imaging Research Institute Shandong University

摘要目的寻找可用于鉴别高级别和低级别软组织肉瘤(STS)的MR影像特征。材料与方法本研究通过机构审查委员会批准并获得知情同意书。回顾性纳入被诊断为STS的

关键词： MR STS 低级别软组织肉瘤高级别

Battery prognostics and health management for electric vehicles under industry 4.0

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

能源化学:英文版 2023年第9期84卷 30-33页

作者： Jingyuan zhao Andrew f.Burke Institute of Transportation Studies University of California DavisDavisCA 95616USA

Transportation electrification is essential for decarbonizing transport. Currently, lithium-ion batteries are the primary power source for electric vehicles (EVs). However, there is still a significant journey ahead before EVs can establish themselves as the dominant force in the global automotive market. Concerns such as range anxiety, battery aging, and safety issues remain significant challenges.

关键词： Lithium-ion battery Prognostics and health management Machine learning Cloud Artificial intelligence Digital twins Lifelong learning

Review on supercapacitors:Technologies and performance evaluation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第8期30卷 276-291,I0006页

作者： Jingyuan zhao Andrew f.Burke Institute of Transportation Studies University of California-Davis95616 DavisUSA Computer Science and Technology Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences518118 ShenzhenChina

The development of electrochemical capacitors(i.***.supercapacitors)have attracted a lot of attention in recent years because of the increasing demand for efficient,high-power energy storage.Electrochemical capacitors(ECs)are particularly attractive for transportation and renewable energy generation applications,taking advantage of their superior power capability and outstanding cycle life.Over the past decade,various advanced electrode materials and cell design are being studied to improve the energy density of ECs.Hybrid Li-ion capacitors and pseudo-capacitors that utilize fast surface redox reactions of metal oxide and doped polymers are the prime candidates being considered.This paper is concerned with the metrics being used to describe the performance of ECs and how the metrics are evaluated by testing devices and how the data from the testing are best interpreted.Emphasize is on relating testing of advanced ECs using materials more complex than activated carbons to testing electric double-layer capacitors(EDLCs)using carbon in both electrodes.A second focus of the paper is projecting the potential of the advanced materials and ionic liquid electrolytes for the development of complete EC cells having an energy density more than a factor of ten greater the energy density of the EDLC devices currently on the market.This potential was evaluated by calculating the performance(energy and power)of a series of ECs that utilize the advanced materials that have been studied by electrochemists over the past 10-15 years.The capacitance and resistance of the advanced ECs were calculated utilizing specific capacitance(f/g or f/cm^(3))and porosity data for the electrode materials and ionic conductivity of the electrolytes.It was concluded that hybrid ECs can be developed with energy densities of at least 50 Wh/kg,70 Wh/L with efficient power greater than 3 k W/kg.Continued research on micro-porous carbons with specific capacitance of 200 f/g and greater is needed.to achieve these EC performance goals.

关键词： Electrochemical capacitors Metrics Evaluation Cell design Applications

A new thermodynamically stable Nb_(2)Ni intermetallic compound phase revealed by peritectoid transition within binary Nb-Ni alloy system

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第5期100卷 246-253页

作者： J.F.Zhao H.P.Wang B.Wei School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710072China

A new intermetallic compound of thermodynamically stable Nb_(2)Ni phase is discovered within Nb-Ni binary system,refreshing the current situation that there are only three stable intermediate phases of Nb_(7)Ni_(6),NbNi_(3) and NbNi_(8).The new stable phase is generated from the peritectoid transition:(Nb)+Nb_(7)Ni_(6)→Nb_(2)Ni,and the transformation temperature is 1533 K.This refreshes the current equilibrium Nb-Ni binary phase diagram.It is confirmed by transmission electron microscopy and the annealing experiments,which is determined to be the fCC structure(Pearson:cf96,space grope:fd-3m O2,a=11.888A).furthermore,the equilibrium properties of Nb_(2)Ni phase are produced by density functional theory,including the formation energy,cohesive energy,bulk modulus and lattice constant.

关键词： Intermetallic compound Peritectoid transition Transmission electron microscopy Density functional theory Nb alloy

Vibration Control of an Experimental flexible Manipulator Against Input Saturation

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1340-1342页

作者： Zhijia zhao Sentao Cai Ge Ma f.Richard Yu the School of Mechanical and Electrical Engineering Guangzhou UniversityGuangzhou 510006 the Guangdong Laboratory of Artificial Intelligence and Digital Economy(SZ) Shenzhen 518060China the Guangdong Laboratory of Artificial Intelligence and Digital Economy(SZ) College of Computer Science&Software EngineeringShenzhen UniversityShenzhen 518060China

Dear Editor, This letter considers the control problem of an experimental flexible manipulator in position tracking, vibration suppression, and saturation compensation. Based on the backstepping technology and a Nussbaum function, we develop an anti-windup control to restrain the manipulator’s vibration, realize the desire trajectory tracking, and eliminate the saturation.

关键词： restrain eliminate Vibration

Analysis of COVID-19 clusters involving vertical transmission in residential buildings in Hong Kong region

在线全文

学校读者我要写书评

暂无评论

Building Simulation 2023年第5期16卷 701-711页

作者： Pengcheng zhao Department of Mechanical Engineering The University of Hong KongPokfulamHong KongChina

Multiple clusters of coronavirus disease 2019(COVID-19)in Hong Kong have involved vertical transmissions in residential buildings,wherein the flats of confirmed cases were often vertically aligned.Data on the buildings and cases associated with 19 such clusters were retrieved and compared with the corresponding data on the entirety of Hong Kong region.Vertical transmissions usually occurred in old high-rise buildings with small flat areas and low estate prices during winter.In addition,infection occurred frequently among the elderly and among upstairs neighbours of index cases.Virus-laden aerosols may have been transmitted between flats mostly via shared drainpipes,and the vertical distribution of the confirmed cases in a building varied by its drainage system design.for buildings with their entire drainpipes installed indoors,both the upstairs and downstairs neighbours of the index case flats could be infected.By comparison,buildings with their drainage stacks installed outdoors had lower infection risks and demonstrated a clearer pattern of vertical transmission:most infected cases resided upstairs from the index case flats,indicating that the virus spread could be dominated by the stack effect.This study provides valuable data and analysis for developing epidemic control strategies for residential buildings.

关键词： drainage system high-rise building infection SARS-CoV-2 stack effect ventilation