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Math.matical modeling and full-scale sh.king table tests for multi-curve buckling restrained braces

Earth.uake Engineering and Engineering Vibration 2009年第3期8卷 359-371页

作者： C. S. Tsai Yungch.ng Lin Wensh.n Ch.n h. C. su Department of Civil Engineering Feng Chia University Taich.ng Chinese Taipei Graduate Institute of Civil and h.draulic Engineering Feng Chia University Taichung Chinese Taipei Department of Water Resources Engineering and Conservation Feng Chia University Taichung Chinese Taipei

Buckling restrained braces （BRBs） h.ve been widely applied in seismic mitigation since th.y were introduced in th. 1970s. h.wever, traditional BRBs h.ve several disadvantages caused by using a steel tube to envelope th. mortar to prevent th. core plate from buckling, such.as： complex interfaces between th. materials used, uncertain precision, and time consumption during th. manufacturing processes. In th.s study, a new device called th. multi-curve buckling restrained brace （MC-BRB） is proposed to overcome th.se disadvantages. Th. new device consists of a core plate with.multiple neck portions assembled to form multiple energy dissipation segments, and th. enlarged segment, lateral support elements and constraining elements to prevent th. BRB from buckling. Th. enlarged segment located in th. middle of th. core plate can be welded to th. lateral support and constraining elements to increase buckling resistance and to prevent th.m from sliding during earth.uakes. Component tests and a series of sh.king table tests on a full-scale steel structure equipped with.MC-BRBs were carried out to investigate th. beh.vior and capability of th.s new BRB design for seismic mitigation. Th. experimental results illustrate th.t th. MC-BRB possesses a stable mech.nical beh.vior under cyclic loadings and provides good protection to structures during earth.uakes. Also, a math.matical model h.s been developed to simulate th. mech.nical ch.racteristics of BRBs.

关键词： buckling restrained brace energy absorption passive control earth.uake energy plasticity model structural control multi-curve BRB

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Design and Mech.nics Simulation of Bionic Lubrication System of Artificial Joints

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Journal of Bionic Engineering 2006年第3期3卷 155-160页

作者： S. h. su Z. K. h.a J. h. Zh.ng Sch.ol of Mech.tronics Engineering and Automation Shanghai University Shanghai 200072 P R. China

We propose a new structure for artificial joints with.a joint capsule wh.ch.is designed to overcome th. drawback of current prosth.ses th.t omit many functions of th. lubricant and th. joint capsule. Th. new structure is composed of th.ee components： lubricant, artificial joint and artificial joint capsule. Th. lubricant sealed in th. capsule can not only reduce th. wear of th. artificial joint but also prevents th. wear particles leaking into th. body. So unexpected reactions between th. wear particles and body can be avoided completely. A th.ee-dimensional （3-D） finite element analysis （FEA） model was created for a bionic knee joint with.capsule. Th. stresses and th.ir distribution in th. artificial capsule were simulated with.different th.ckness, loadings, and flexion angles. Th. results sh.w th.t th. maximum stress occurs in th. area between th. artificial joint and th. capsule. Th. effects of capsule th.ckness and th. angles of flexion on stress are discussed in detail.

关键词： artificial joint bionic joint capsule 3-D FEA

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EFFECT OF Zr ADDITION TO Ti-KILLED STEEL ON INCLUSION FORMATION AND MICROSTRUCTURAL EVOLUTION IN WELDING INDUCED COARSE-GRAINED h.AT AFFECTED ZONE

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Acta Metallurgica Sinica(English.Letters) 2008年第3期21卷 220-226页

作者： F. Ch.i C.F. Yang h. su Y.Q. Zh.ng Z. Xu Y.h. Yang Institute for Structural Materials Central Iron and Steel Research Institute Beijing 100081 China Sch.ol of Materials Science and Engineering Shanghai Jiaotong University Shanghai 200030 China Sch.ol of Materials Science and Engineering Kunming University of Science and Technology Kunming650093 China

Effects of Zirconium on th. ch.mical component and size distribution of Ti-bearing inclusions, favored th. grain refinement of th. welding reduced, coarse-grained h.at affected zone （CGh.Z） with.enh.nced impact tough.ess in Ti-killed steels, wh.ch.were examined based on experimental observations and th.rmodynamic calculations. It indicated th.t th. ch.mical constituents of inclusions gradually varied from th. TiO oxide to th. Ti-O＋Zr-O compound oxide and a single ph.se of th. ZrO2 oxide, as th. Zr content increased from zero to 0.0100%. A trace of Zr （0.0030%-0.0080%, depending on th. oxygen content in liquid steel） provided a large amount of nucleating core for Ti oxide because of th. larger specific density of ZrO2 oxide, and produced a small size distribution of th. inclusions favorable for acicular ferrite transformation with.a h.gh.nucleation rate in th. CGh.Z, and a h.gh.volume fraction of acicular ferrite was obtained in th. CGh.Z, with.enh.nced impact tough.ess. Oth.rwise, a h.gh.content of Zr （-0.0100%） produced a single ph.se Zr02, wh.ch.was impotent to nucleate acicular ferrite, and a microstructure composed of ferrite side plate and grain boundary ferrite developed in th. CGh.Z. Th. experimental results were confirmed by th.rmodynamic calculations.

关键词： Nonmetallic inclusions Zirconium Acicular ferrite Coarse-grain h.at affected zone (CGh.Z)

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Sh.rt-term Distributed Energy Resource Sch.duling for a DC Microgrid

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Energy and Power Engineering 2013年第4期5卷 15-21页

作者： G. W. Ch.ng h. J. Lu h. J. su Department of Electrical Engineering National Chung Cheng University

A microgrid is associated with.a low voltage distribution power network and inh.rits small modular generation systems and loads th.t h.ve certain coordinated functions to provide th. solution to supply premium power to remote or specific areas. Similar to conventional power systems, th. energy management of distributed generation resources (DERs) is carried out to minimize th. operation cost and maximize benefit of installation of DERS in a microgrid. Th.s paper presents th. process of implementing th. sh.rt-term DER sch.duling function for a dc microgrid. Th. optimal sch.duling results for two operation modes are th.n reported.

关键词： Microgrid Distributed Generation Resources PV Battery

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EXTENDED WARRANTY STRATEGIES FOR ONLINE Sh.PPING suPPLY Ch.IN WITh.COMPETING suPPLIERS CONSIDERING COMPONENT RELIABILITY

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Journal of Systems Science and Systems Engineering 2017年第6期26卷 753-773页

作者： Xingh.ng Qin Qiang su Samuel h. h.ang Sch.ol of Economics and Management Tongji University Shanghai China Sch.ol of Business Planning Chongqing Technology and Business University Chongqing China Department of Mech.nical and Materials Engineering University of Cincinnati Cincinnati USA

Th.s article presents th. issue of extended warranty and management strategies in a th.ee-ech.lon competing online sh.pping supply ch.in with.price- and base warranty period-dependent demand. We employ game th.ory to develop decision models to explore th. interactions between component suppliers and th. manufacturer, as well as competition between two component suppliers. Products and extended warranty are sold by an online store, wh.ch.is th. leader in th. Stackelberg game. Two scenarios are considered： eith.r th. manufacturer offers a prepaid extended warranty to customers or doses not. In each.scenario, base warranties are assumed to be bundled with.products. Our results sh.w th.t wh.n th. manufacturer＇s repair costs ch.nge in a proper range, providing extended warranty can benefit both.th. manufacturer and th. online store; oth.rwise, th. manufacturer h.s no incentive to offer th. extended warranty. Reducing repair costs, improving component reliability, or sh.rtening th. base warranty period allows th. manufacturer to realize significantly better value of th. extended warranty. h.gh.component reliability benefits both.th. manufacturer and th. online store, with.th. manufacturer reaping more benefit. Extending th. length.of th. base warranty adversely affects profit of th. manufacturer and th. value of th. extended warranty.

关键词： Extended warranty online sh.pping supply ch.in game th.ory online sh.pping

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A surface engineering strategy for th. stabilization of zinc metal anodes with.montmorillonite layers toward long-life rech.rgeable aqueous zinc ion batteries

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Journal of Energy Ch.mistry 2025年第1期100卷 94-105页

作者： Wenbo Wang Ruifeng Xu Xu Zh.ng Peiyu Wang Bao Yang Bingjun Yang Juan Yang Kailimai su Pengjun Ma Yanan Deng Xianfeng Fan Wanjun Ch.n Key Laboratory for Electronic Materials College of Electrical Engineering Northwest Minzu University Resource Ch.mistry and Energy Materials Research.Center State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Institute for Materials and Processes School of Engineering University of Edinburgh

Rech.rgeable aqueous zinc-ion batteries （AZIBs） exh.bit appreciable potential in th. domain of electroch.mical energy ***,th.re are serious ch.llenges for AZIBs,for instance zinc dendrite growth.h.drogen evolution reaction （h.R）,and corrosion side ***,we propose a surface engineering modification strategy for coating th. montmorillonite （MMT） layer onto th. surface of th. Zn anode to tackle th.se issues,th.reby ach.eving h.gh.cycling stability for rech.rgeable *** results reveal th.t th. MMT layer on th. surface of th. Zn anode is able to provide ordered zincoph.lic ch.nnels for zinc ions migration,facilitating th. reaction kinetics of zinc *** functional th.ory（DFT） calculations and water contact angle （CA） tests prove th.t MMT@Zn anode exh.bits superior adsorption capacity for Zn2+and better h.droph.bicity th.n th. bare Zn anode,th.reby ach.eving excellent cycling ***,th. MMT@Zn||MMT@Zn symmetric cell h.lds th. stable cycling over 5600 h.at 0.5 mA cm-2and 0.125 m A h.cm-2,even exceeding 1800 h.long cycling under h.rsh.conditions of 5 m A cm-2and 1.25 m A h.*** MMT@Zn||V2O5full cell reach.s over 3000 cycles at 2 A g-1with.excellent rate ***,th.s surface engineering modification strategy for enh.ncing th. electroch.mical performance of AZIBs represents a promising application.

关键词： surface engineering strategy Montmorillonite layer Protection mech.nism of Zn anode Cycling stability Aqueous zinc ion batteries

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h.erarch.cal sodium-rich.Prussian blue h.llow nanosph.res as h.gh.performance cath.de for sodium-ion batteries

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Nano Research 2018年第8期11卷 3979-3990页

作者： Xiao Tang h.o Liu Dawei su Peter h. L. Notten Guoxiu wang Center for Clean Energy Tech.ology Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia Department of Ch.mical Engineering and Ch.mistry Eindhoven University of Technology Eindhoven 5600 MB The Netherlands Fundamental Electroch.mistry (IEKg) Forschungszentrum Julich Julich D-52425 Germany

Recently, Prussian blue and its analogues （PBAs） h.ve attracted tremendous attention as cath.de materials for sodium-ion batteries because of th.ir good cycling performance, low cost, and environmental friendliness. h.wever, th.y still suffer from kinetic problems associated with.th. solid-state diffusion of sodium ions during ch.rge and disch.rge processes, wh.ch.leads to low specific capacity and poor rate performances. In th.s work, novel sodium iron h.xacyanoferrate nanosph.res with.a h.erarch.cal h.llow arch.tecture h.ve been fabricated as cath.de material for sodium-ion batteries by a facile template meth.d. Due to th. unique h.llow sph.re morph.log~ sodium iron h.xacyanoferrate nanosph.res can provide large numbers of active sites and h.gh.diffusion dynamics for sodium ions, th.s delivering a h.gh.specific capacity （142 mAh.g）, a superior rate capabili, and an excellent cycling stability. Furth.rmore, th. sodium insertion/extraction mech.nism h.s been studied by in situ X-ray diffraction, wh.ch.provides furth.r insigh. into th. crystal structure ch.nge of th. sodium iron h.xacyanoferrate nanosph.re cath.de material during ch.rge and disch.rge processes.

关键词： sodium-rich sodium ironh.xacyanoferrate h.llow nanosph.res cath.de sodium-ion batteries

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Effects of longwall-induced stress and deformation on th. stability and mech.nical integrity of sh.le gas wells drilled th.ough.a longwall abutment pillar

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International Journal of Mining Science and Tech.ology 2017年第1期27卷 115-120页

作者： Daniel W.h.su National Institute for Occupational Safety and h.alth Bruceton 15236PAUSA

Th.s paper presents th. results of a compreh.nsive study conducted by CONSOL Energy, Marcellus Sh.le Coalition, and Pennsylvania Coal Association to evaluate th. effects of longwall-induced subsurface deformations on th. mech.nical integrity of sh.le gas wells drilled over a longwall abutment *** primary objective is to demonstrate th.t a properly constructed gas well in a standard longwall abutment pillar can maintain mech.nical integrity during and after mining operations. A study site was selected over a south.estern Pennsylvania coal mine, wh.ch.extracts 457-m-wide longwall faces under about 183 m of cover. Four test wells and four monitoring wells were drilled and installed over a 38-m by84-m centers abutment pillar. In addition to th. test wells and monitoring wells, surface subsidence measurements and underground coal pillar pressure measurements were conducted as th. 457-m-wide longwall panels on th. south.and north.sides of th. abutment pillar were mined by. To evaluate th. resulting coal protection casing profile and lateral displacement, th.ee separate 60-arm caliper surveys were conducted. Th.s research.represents a very important step and initiative to utilize th. knowledge and science obtained from mining research.to improve miner and public safety as well as th. safety and h.alth.of th. oil and gas industries.

关键词： Gas well Casing Abutment pillar Stability Safety and h.alth Instrumentation Numerical simulation

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Toxicity of substituted benzenes and algae (Scenedesmus obliquus) with.solvation equation

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Ch.nese Science Bulletin 2009年第10期54卷 1690-1696页

作者： Zh.O Yuanh.i QIN WeiCh.o su LiMin YUAN Xing LU Guangh.a ABRAh.N h. Mich.el Department of Environmental Science Northeast Normal University Changchun 130024 China College of Environmental Science and Engineering Hohai University Nanjing 210098 China Department of Ch.mistry University College London London WC1H OA J UK

Quantitative structure-activity relationsh.ps (QSARs) for th. toxicity of substituted ph.nols, anilines and nitrobenzenes to algae (Scenedesmus obliquus) h.ve been studied. Ch.micals were divided into polar narcotics and electroph.les based on structure criteria according to th. toxicity mech.nisms of action. A good relationsh.p between th. toxicity and octanol/water partition coefficient (logP) was observed for th. polar narcotic compounds. Th. results confirmed th.t h.droph.bicity is th. determining ph.sicoch.mical parameter in modelling narcotics. h.wever, no statistically significant mono-parametric QSAR models could be made from descriptors calculated in th.s study for all th. compounds. In order to investigate th. mech.nisms of toxic action and develop QSAR models for all compounds, Abrah.m solvation descriptors were calculated from th. program of Ph.rma-Algorith.s. Stepwise regression produced a th.ee-parameter QSAR model (polarizability/dipolarity, h.drogen-bond basicity and molecular volume) with.a good statistical fit for all th. compounds studied, wh.ch.h.d square of th. correlation coefficient R2=0.83. We h.ve also developed an interpretable QSAR model by using parameter of logP, wh.ch.represents th. bio-uptake process, and polarizability/dipolarity (S), wh.ch.represents th. interaction of ch.micals with.th. acceptor micromolecules (target receptor) at th. active site. No h.drogen-bond interaction was observed between th. ch.micals and receptor micromolecules.

关键词：毒性作用取代苯酚溶剂化硝基苯类化合物藻类定量构效关系氢键相互作用方程

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Th. discovery of artemisinin and th. Nobel Prize in Ph.siology or Medicine

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Science Ch.na(Life Sciences) 2015年第11期58卷 1175-1179页

作者： su Xin-Zh.an MILLER Louis h. Laboratory of Malaria and Vector Research National Institute of Allergy and Infectious DiseasesNational Institutes of Health

1 summary Th. 2015 Nobel Prize in Ph.siology or Medicine was awarded to Professor Tu YouYou for h.r key contributions to th. discovery of artemisinin. Artemisinin h.s saved mil- lions of lives and represents one of th. significant contribu- tions of Ch.na to global h.alth. Many scientists were in- volved in th. previously unknown 523 Project, and th. No- bel Prize given to a single person h.s not been with.ut con- troversy. h.re we summarize some key events in th. 523 Project and present our views on th. Award to h.lp th. pub- lic better understand th. rationale of th. Nobel Committee＇ s decision, th. significance of th. discovery, and current is- sues related to artimisinin in treating malaria.

关键词：诺贝尔生理学或医学奖青蒿素 MIL 科学家委员会生命狮子疟疾

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