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Journal of Materiomics 2022年第4期8卷 882-892页

作者： z.sun X.Chen Juncheng zhang Huiyuan Geng L.X.zhang State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China

Skutterudite(SKD)thermoelectric materials have high conversion efficiency,great mechanical proper-ties,and economical practicability in the medium temperature range(500e550C).They need to bejoined with metal electrodes to form a thermoelectric power generation device during ***,high contact resistivity,severe element diffusion,and large coefficient of thermal expansionmismatch are main obstacles for their *** address these issues,a FeCoNiCrMo high-entropyalloy diffusion barrier layer was designed and prepared using an arc smelting method in this *** heating temperatures on the microstructure and properties of the bonded joints were *** maximum shear strength was 21.6 Mpa and the corresponding reaction layer thickness,contactresistivity were 3.77 mm,1.8 mUcm2 respectively at 600C,40 MPa,10 *** strength dropped downto 18.8 MPa and the contact resistivity increased to 4.2 mU cm2 after aging for 640 *** modelwas established and it predicted that the contact resistivity would keep lower than 6.5 mU cm2(300 h,100 days)and 11 mU cm2(8760 h,1 year)and the reaction layer thickness would not exceed 25 mm(2400 h,100 days)and 45 mm(8760 h,1 year).

关键词： High-entropy diffusion barrier layer Skutterudite Diffusion bonding Microstructure Shear strength Contact resistivity

On building automation system security

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High-Confidence Computing

High-Confidence Computing 2024年第3期4卷 103-122页

作者： Christopher Morales-Gonzalez Matthew Harper Michael Cash Lan Luo zhen Ling Qun z.sun Xinwen Fu Department of Computer Science University of Massachusetts LowellLowell 01854USA Department of Electrical and Computer Engineering University of Central FloridaOrlando 32816USA School of Computer Science and Technology Southeast UniversityMa’anshan 243032China School of Computer Science and Engineering Anhui University of TechnologyNanjing 211189China

Building Automation Systems(BASs)are seeing increased usage in modern society due to the plethora of benefits they provide such as automation for climate control,HVAC systems,entry systems,and lighting *** BASs in use are outdated and suffer from numerous vulnerabilities that stem from the design of the underlying BAS *** this paper,we provide a comprehensive,up-to-date survey on BASs and attacks against seven BAS protocols including BACnet,EnOcean,KNX,LonWorks,Modbus,zigBee,and *** studies of secure BAS protocols are also presented,covering BACnet Secure Connect,KNX Data Secure,KNX/IP Secure,ModBus/TCP Security,EnOcean High Security and z-Wave *** and zigBee do not have security *** point out how these security protocols improve the security of the BAS and what issues remain.A case study is provided which describes a real-world BAS and showcases its vulnerabilities as well as recommendations for improving the security of *** seek to raise awareness to those in academia and industry as well as highlight open problems within BAS security.

关键词： Building automation system BAS protocols Security Attack

Methodologies for preparation of prokaryotic extracts for cell-free expression systems

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Synthetic and Systems Biotechnology 2020年第4期5卷 252-267页

作者： Stephanie D.Cole Aleksandr E.Miklos Abel C.Chiao zachary z.sun Matthew W.Lux US Army Combat Capabilities Development Command Chemical Biological Center 8567 Ricketts Point RoadAberdeen Proving GroundMD21010USA Division of Biology and Biological Engineering California Institute of TechnologyPasadenaCAUSA Synvitrobio Inc. San FranciscoCAUSA 8567 Ricketts Point Road Bldg E3549 Room B140APGMD21010USA

Cell-free systems that mimic essential cell functions,such as gene expression,have dramatically expanded in recent years,both in terms of applications and widespread *** we provide a review of cell-extract methods,with a specific focus on prokaryotic ***,we describe the diversity of Escherichia coli genetic strains available and their corresponding *** then trace the history of cell-extract methodology over the past 20 years,showing key improvements that lower the entry level for new ***,we survey the rise of new prokaryotic cell-free systems,with associated methods,and the opportunities ***,we use this historical perspective to comment on the role of methodology improvements and highlight where further improvements may be possible.

关键词： Cell-free systems Cell-free expression Cell-free extract Synthetic biology Methods

CORRELATION BETWEEN THE ELASTIC AND THE VIBRONIC BEHAVIOR OF NANOSTRUCTURED TITANIA AND THEIR PRESSURE,SIzE,AND TEMPERATURE DEPENDENCE

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Journal of Advanced Dielectrics 2011年第4期1卷 407-416页

作者： X.J.LIU L.K.PAN z.sun Y.M.CHEN X.X.YANG L.W.YANG z.F.zHOU CHANG Q.sun Engineering Research Center for Nanophotonics&Advanced Instrument Ministry of Education Department of Physics East China Normal University Shanghai 200062P.R.China Institute for Quantum Engineering and Micro-Nano Energy Technology Key Laboratory of Low-Dimensional Materials and Application Technology and Faculty of Materials and Optoelectronic Physics Xiangtan University Hunan 411105P.R.China School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore

Correlation bet ween the elastic and the vibronic behavior of TiO_(2) and their responses to thevariation of crystal size,applied pressure,and measuring temperature has been investig ated basedon the bond order-length-strength correlation *** reproduction of themeasurements clarified that.(i)the elastic modulus(B)and the Raman shifts(△ω)are stronglycorrelated and we can know either one of the B or the △ω from the other;(i)the under-coordination induced cohesive energy loss and the energy density gain in the surface up to skindepth determines the size effect;(ii)bond expansion and bond weakening due to thermalvibration originat es the thermally softened elastic modulus and the Raman shifts;and(iv)bondcompression and bond strengthening results in the mechanically stiffened elastic modulus and theRaman *** the developed premise,one can predict the changing trends of the concernedproperties with derivatives of quantitative information of the atomic cohesive energy,bindingenergy density,Debye tempera ture,and nonlinear compressibility of the specimen.

关键词： TiO_(2)nanostructures elasticity Ramanshift pressure temperature

Fabrication of Field Emission Display Prototype Utilizing Printed Carbon Nanotubes/Nanofibers Emitters

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Fabrication of Field Emission Display Prototype Utilizing Pr...

Development of Carbon Nanotube Light Array for Large-size Display

2007亚洲显示国际会议

作者： P.S.Guo T.Chen Y.W.Chen z.J.zhang T.Feng L.L.Wang L.F.Lin z.sun Engineering Research Center for Nanophotonics & Advanced Instrument,Ministry of Education Nanotech Center and Department of Physics,East China Normal University,North zhongshan Rd.3663,Shanghai 200062,China

Carbon nanotubes/nanofibers(CNTs)used as emitters,diode-type field emission display(FED)prototypes of dot ma- trix and character image were fabricated by low-cost techniques and equipments,*** technical development in the design and fabrication of the cathode,the anode and the panel are *** were produced by a simple, low-cost and easily-controllable thermal chemical vapor *** cathode was prepared by the screen-printing meth- od and its field emission characteristics were enhanced by a heat post-treatment in H gas *** panel structure was packaged by a vacuum fluorescent display-like process and vacuum-sealed through an exhausting glass *** fully-sealed CNTs FED(c-FED)showed good emission property and *** brightness of 600 cd/m was achieved from the yellow phosphor below a relatively low applied electric *** developed technology has potential practical application in c-FED.

关键词： Field Emission Display Carbon Nanotubes Carbon Nanofibers Chemical Vapor Deposition(CVD) Screen-printing

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Development of Carbon Nanotube Light Array for Large-size Di...

基于血凝块的时间密度曲线作为急性缺血性卒中机械取栓功能性结局的新型影像学预测因子

2007亚洲显示国际会议

作者： T.Feng~1 z.sun~1 L.L.Wang~1 T.Chen~1 z.J.zhang~1 L.F.Lin~1 Y.W.Chen~1 P.S.Guo~1 X.Wang~2 1 Engineering Research Center for Nanophotonics & Advanced Instrument Ministry of Education East China Normal University Shanghai 200062 China 2 Shanghai Institute of Microsystem and Information Technology Chinese Academy of Science Shanghai 200050 China

＜正＞Carbon nanotube（CNT）light array is a very promising technology for piling-up large-size display,because of it owns many advantages such as low cost,high luminance,long life,low power,fast response,full color,good compatibility, and so *** this paper,we prepared CNT cathode using screen-printing *** that,we improved the field emission properties of the CNT cathode using plasma surface modification ***,we designed and sealed di- ode-type 16×16 matrix CNT fight array *** simple driving circuits,we realized the dynamic display of the 16×16 matrix CNT light array device.

关键词： Carbon Nanotube(CNT) Field Emission Display(FED) Large-size Disply

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国际医学放射学杂志 2024年第3期 376-376页

作者： J.Wei J.Jiang Y.zhu X.Wei z.sun J.sun 吴小佳

摘要目的从CT灌注成像（CTP）中获得的血栓通透性的新评价指标可否更准确地预测急性缺血性脑卒中（AIS）中机械血栓切除术（MT）的临床反应。方法研究纳入2018年4

关键词：

加速PET/MR成像对儿童与青年人癌症分期的评估

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国际医学放射学杂志 2017年第1期 109-109页

作者： M.Aghighi L.J.Pisani z.sun C.Klenk H.Madnawat S.L.Fineman 柴超 Department of Radiology Molecular Imaging Program at Stanford Stanford University

摘要目的如果成像参数合理,采用18F-FDG PET结合全身MR成像对儿童肿瘤的分期进行评估理论上是可行的。本研究对18F-FDG PET结合MR短TI反转恢复脉冲（STIR）

关键词： MR FDG STIR 全身 PET/MR 儿童

Influence of introducing zr,Ti,Nb and Ce elements on externally solidified crystals and mechanical properties of high-pressure die-casting Al–Si alloy

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 147-153页

作者： Junjie Li Wenbo Yu zhenyu sun Weichen zheng Liangwei zhang Yanling Xue Wenning Liu Shoumei Xiong Center of Materials Science and Engineering School of Mechanical and Electronic Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Traffic&Transportation Engineering Central South UniversityChangsha 410075China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

High pressure die casting(HPDC)AlSi10Mn Mg alloy castings are widely used in the automobile *** can optimize the mechanical properties of castings through heat treatment,while the release of thermal stress arouses the deformation of large integrated ***,the development of non-heat treatment Al alloys is becoming the hot *** addition,HPDC contains externally solidified crystals(ESCs),which are detrimental to the mechanical properties of *** achieve high strength and toughness of non-heat treatment die-casting Al-Si alloy,we used AlSi9Mn alloy as matrix with the introduction of zr,Ti,Nb,and *** influences on ESCs and mechanical properties were systematically investigated through three-dimensional reconstruction and thermodynamic *** results reveal that the addition of Ti increased ESCs'size and porosity,while the introduction of Nb refined ESCs and decreased ***,large-sized Al_3(zr,Ti)phases formed and degraded the mechanical *** introduction of Ce resulted in the poisoning effect and reduced mechanical properties.

关键词： aluminium alloy high-pressure die-casting externally solidified crystals non-heat treatment

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ON THE L_∞ CONVERGENCE AND THE EXTRAPOLATION METHOD OF A DIFFERENCE SCHEME FOR NONLOCAL PARABOLIC EQUATION WITH NATURAL BOUNDARY CONDITIONS

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Journal of Computational Mathematics 2001年第5期19卷 449-458页

作者： Wan, z.-S. sun, z.-z. Institute of Applied Physics and CM P.O. Box 8009 Beijing 100088 China

In paper (J. Comput. Appl. Math., 76 (1996), 137-146), a difference scheme for a class of nonlocal parabolic equations with natural boundary conditions was derived by the method of reduction of order and the unique solvability and second order convergence in L2-norm are proved. In this paper, we prove that the scheme is second order convergent in L∞ norm and then obtain fourth order accuracy approximation in L∞ norm by extrapolation method. At last, one numerical example is presented.

关键词： Approximation theory Boundary conditions Convergence of numerical methods Extrapolation

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