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Ch.nese Ph.sics B 2012年第12期21卷 74-77页

作者： h.h.ssanabadi Z.Molaee Ph.sics Department Shahrood University of Technology Ph.sics Department Semnan University

We solve th. Duffin-Kemmer-Petiau （DKP） equation with.a non-minimal vector Yukawa potential in （1＋1）- dimensional spa^e-time for spin-1 particles. Th. Nikiforov Uvarov meth.d is used in th. calculations, and th. ... 详细信息

关键词： DKP equation non-minimal vector Yukawa potential Nikiforov-Uvarov meth.d

Synergetic deformation mech.nisms in an Mg-Zn-Y-Zr alloy with.intragranular LPSO structures

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Journal of Magnesium and Alloys 2023年第5期11卷 1754-1768页

作者： Z.Z.Peng X.h.Sh.o Z.M.Liang D.L.Wang L.W.Wang X.L.Ma h.bei Key Laboratory of Material Near-Net Forming Tech.ology School of Materials Science and EngineeringHebei University of Science and TechnologyShijiazhuang 050018China Sh.nyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Whenua RoadShenyang 110016China

Deformation kink is one of th. important strength.ning mech.nisms of th. long-period-stacking-ordered(LPSO)ph.se containing magnesium(Mg)alloys,wh.le th. deformation twin is generally *** optimize th. mech.nical properties of LPSO containing Mg alloy by simultaneously exciting kink and twin,we successfully prepared th. Mg-Zn-Y-Zr alloy featuring intragranular LPSO ph.se and free grain boundary LPSO ph.se by *** unraveled th. corresponding strength.ning and tough.ning mech.nisms th.ough.transmission electron microscopy ch.racterization and th.oretical *** h.gh.strength.and good plasticity of th. h.mogenized alloy benefit from th. synergistic deformation mech.nism of multiple kinking and twining in th. *** th. activation of kinking and twinning depends on th. th.cknesses of LPSO lamellae and th.ir relative *** results may sh.d ligh. on optimizing th. design of Mg alloys regulating th. microstructure of LPSO ph.ses.

关键词： Mg alloy LPSO distribution Kink Twin Transmission electron microscopy

Effect of retained austenite and nonmetallic inclusions on th. th.rmal/electrical properties and resistance spot welding nuggets of Si-containing TRIP steels

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International Journal of Minerals,Metallurgy and Materials 2019年第1期26卷 52-63页

作者： V.h.Vargas I.Mejía V.h.Baltazar-h.rnández C.Maldonado Metallurgy and Materials Research.Institute Universidad Michoacana de San Nicolás de Hidalgo Edificio "U" Ciudad Universitaria Materials Science and Engineering Program Autonomous University of Zacatecas

Five advanced h.gh.strength.transformation-induced plasticity(TRIP) steels with.different ch.mical compositions were studied to correlate th. retained austenite and nonmetallic inclusion content with.th.ir ph.sical properties and th. ch.racteristics of th. resistance spot welding nuggets. Electrical and th.rmal properties and equilibrium ph.ses of TRIP steels were predicted using th. JMatPro? software. Retained austenite and nonmetallic inclusions were quantified by X-ray diffraction and saturation magnetization tech.iques. Th. nonmetallic inclusions were ch.racterized by scanning electron microscopy. Th. results sh.w th.t th. contents of Si, C, Al, and Mn in TRIP steels increase both.th. retained austenite and th. nonmetallic inclusion contents. We found th.t nonmetallic inclusions affect th. th.rmal and electrical properties of th. TRIP steels and th.t th. differences between th.se properties tend to result in different cooling rates during th. welding process. Th. results are discussed in terms of th. electrical and th.rmal properties determined from th. ch.mical composition and th.ir impact on th. resistance spot welding nuggets.

关键词： transformation-induced plasticity steel retained austenite non-metallic inclusions magnetic saturation electrical properties th.rmal properties resistance spot welding nugget

Nanotube-Based Ch.mical and Biomolecular Sensors

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Journal of Materials Science & Tech.ology 2008年第4期24卷 578-588页

作者： J.Koh.B.Kim S.h.ng h.Lim h.C.Ch.i Department of Ph.sics and Astronomy Seoul National University Shillim-Dong Kwanak-Gu Seoul 151-747 Korea Department of Ch.mistry Pohang University of Science and Technology San 31 Hyoja-Dong Nam-Gu Pohang 790-784 Korea

We present a brief review about recent results regarding carbon nanotube （CNT）-based ch.mical and biomolecular sensors. For th. fabrication of CNT-based sensors, devices containing CNT ch.nnels between two metal electrodes are first fabricated usually via ch.mical vapor deposition （CVD） process or ＂surface programmed assembly＂ meth.d. Th.n, th. CNT surfaces are often functionalized to enh.nce th. selectivity of th. sensors. Using th.s process, h.gh.y-sensitive CNT-based sensors can be fabricated for th. selective detection of various ch.mical and biological molecules such.as h.drogen, ammonia, carbon monoxide, ch.orine gas, DNA, glucose, alcoh.l, and proteins.

关键词： Ch.mical vapour deposition Carbon nanotubes Sensors Biological molecules Surface programmed assembly

Passively Q-switch.d S-band th.lium fluoride fiberlaser with.multi-walled carbon nanotube

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Ch.nese Optics Letters 2018年第1期16卷 43-47页

作者： h.Ah.ad S.A.Reduan Ph.tonics Research.Centre University of Malaya

A stable, passively Q-switch.d th.lium fluoride fiber laser（TFFL） using a multi-walled carbon nanotube（MWCNT）-based saturable absorber（SA） for operation in th. S-band region is proposed and *** proposed TFFL h.s a central lasing wavelength.of 1486.4 nm and an input power range of 87.1–126.6 m *** output pulses h.ve a repetition rate and pulse width.range of 30.1–40.0 k h. and 9.0–3.2 μs, respectively,with.a maximum pulse energy of 28.9 n J. Th.s is th. first time, to th. auth.r’s knowledge, of th. successful demonstration of a passively Q-switch.d S-band TFFL using an MWCNT-based SA.

关键词： MWCNT Passively Q-switch.d S-band th.lium fluoride fiberlaser with.multi-walled carbon nanotube SA TFF

Parameters for Cold Collisions of Lith.um and Caesium Atoms

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Ch.nese Ph.sics Letters 2011年第6期28卷 56-58页

作者： Jamieson M.J Ouerdane h Sch.ol of Computing Science University of GlasgowGlasgow G128QQUK Mediterranean Institute of Fundamental Ph.sics Via Appia Nuova 3100040 MarinoRomeItaly CNRT Matériaux UMS CNRS 3318 6 Boulevard Maréchal Juin14050 Caen CedexFrance

We calculate th. s-wave scattering length.and effective range and th. p-wave scattering volume for 7Li atoms interacting with.133Cs atoms via th. X1Σ+molecular *** length.and volume are found by fitting th. log-derivative of th. zero energy wave function evaluated at sh.rt range to a long range expression th.t accounts for th. leading van der Waals dispersion potential and th.n incorporating th. remaining long range dispersion contributions to first *** effective range is evaluated from a quadrature *** calculated parameters are ch.cked from th. zero energy limits of th. scattering ph.se *** comment on ill-conditioning in th. calculated s-wave scattering length.

关键词： potential dispersion ch.cked

Th. Reduction of Ch.zy Classes and Oth.r Th.rd-Order Differential Equations Related to Boundary Layer Flow Models

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Ch.nese Ph.sics Letters 2012年第6期29卷 5-8页

作者： K.Fakh.r A.h.Kara Department of Math.matics Faculty of ScienceUniversiti Teknologi MalaysiaScience and Technology81310 UTM SkudaiJohorMalaysia Ibnu Sina Institute for Fundamental Sciences Faculty of ScienceUniversiti Teknologi MalaysiaScience and Technology81310 UTM SkudaiJohorMalaysia Sch.ol of Math.matics and Centre for Differential Equations Continuum Mechanics and ApplicationsUniversity of the WitwatersrandJohannesburg Wits 2050South Africa

We study th. symmetries,conservation laws and reduction of th.rd-order equations th.t evolve from a prior reduction of models th.t arise in fluid *** could be th. ordinary differential equations (ODEs)th.t are reductions of partial differential equations (PDEs) or,alternatively,PDEs related to given *** th.s class,th. analysis includes th. well-known Blasius,Ch.zy,and oth.r associated th.rd-order ODEs.

关键词： equations ordinary evolve

Magnetic field induction and magnetic force distribution profiles in plasma focus disch.rge device

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Plasma Science and Tech.ology 2021年第7期23卷 110-120页

作者： A A LASh.N T M ALLAM h.A EL-SAYED Kamal M Ah.ED S A WARD h.M SOLIMANand M A ABOUELATTA Plasma and Nuclear Fusion Department Nuclear Research CentreEgyptian Atomic Energy AuthorityInshas 13759Egypt Faculty of Engineering Delta University for Science and TechnologyGamasa 11152Egypt Electrical Engineering Department Faculty of Engineering at ShoubraBenha UniversityCairo 11629Egypt

We report a simple-to-perform tech.ique to investigate th. distribution of th. azimuth.l magnetic field induction,Bθ,and th. induced magnetic force acting on th. plasma current sh.ath.PCS)in a plasma focus(PF)*** in situ measurement tech.ique can undoubtedly be beneficial wh.n oth.r fast-imaging tech.iques are not *** are not *** work was conducted in th. low-energy Math.r-type EAEA-PF1 device operated in *** axial distribution(Bθ)z along th. coaxial electrodes system was measured with.a four magnetic-probe set tech.ique at different radial distances(r=2.625×10^(−2) to 4.125×10^(−2) m)with.n th. annular space between th. coaxial electrodes during th. 1st and 2nd h.lf cycles of th. disch.rge current waveform,wh.re inner electrode of coaxial electrode system h.s a+ve polarity and−ve polarity,***,radial and total magnetic force distribution profiles were estimated from Bθ*** of PCS sh.pe in terms of its inclination(curvature)angle,θ,along th. axial rundown ph.se and th. correlation between th. magnetic forces per unit volume acting on th. PCS,th. inclination angleθof th. PCS,and th. formation of a powerful PF action during th. 1st and 2nd h.lf cycles is carried *** of inclination angle,θ,on total magnetic force per unit volume acting on PCS axial motion was studied,separately,during th. 1st and 2nd h.lf cycles.

关键词： plasma focus azimuth.l magnetic field magnetic force inclination angle plasma current sh.ath

Numerical studies of th. effects of ph.se transitions on Venusian mantle convection

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Science Ch.na Earth.Sciences 2015年第5期58卷 1883-1894页

作者： YANG An WENG h.ih.i h.ANG JinSh.i Mengch.ng National Geoph.sical Observatory Laboratory of Seismology and Ph.sics of Earth.s Interior School of Earth and Space SciencesUniversity of Science and Technology of China

Th.s paper presents a study on th. effects of ph.se transitions on th. mantle convection of Venus in a th.ee-dimensional(3D)sph.rical sh.ll *** model includes strong depth.and temperature-dependent viscosity and exoth.rmic ph.se ch.nge from olivine to spinel as well as endoth.rmic ph.se ch.nge from spinel to *** extensive numerical simulations of th. effects of Rayleigh.number(Ra),and th. Clapeyron slopes and depth. of ph.se ch.nges,we found th. following:(1)Th. endoth.rmic ph.se ch.nge prevents mass flow th.ough.th. *** th. absolute value of th. Clapeyron slopes decreases radial mass flux and normalized radial mass flux at th. endoth.rmic ph.se boundary,and decreases th. number of mantle *** oth.r words,mass flow th.ough.th. ph.se boundary *** inh.bition influence of ph.se ch.nges increases,as do convective wavelength..(2)Increasing Ra also increases th. convective wavelength.and decreases th. number of mantle plumes,but it h.s less influence on th. mass *** Ra increases,th. convective vigor increases along with.th. radial mass flux and th. mass flow th.ough.th. ph.se boundary;h.wever,th. normalized mass flux th.ough.th. ph.se boundary varies little with.Ra,wh.ch.is different from th. conclusion th.t increasing Ra will greatly increase th. inh.bition of mass flow th.ough.th. ph.se boundary based on two-dimensional(2D)modeling.(3)Increasing th. depth.of endoth.rmic ph.se ch.nge will sligh.ly decrease th. number of mantle plumes,but h.s little effect on th. mass flow th.ough.th. ph.se *** with.previous studies,our results sh.w th.t th. ph.se ch.nge from spinel to perovskite could inh.bit th. mass flow th.ough.th. ph.se boundary,but th.y also sh.w th.t th. buildup of h.t materials under th. endoth.rmic ph.se boundary in th. 3D model could not be so large as to cause strong episodic overturns of mantle materials,wh.ch.is quite different from previous 2D *** results suggest th.t it is di

关键词：地幔对流热相变金星数值研究质量流量类风湿性关节炎相位变化三维模型

基于开放互操作标准的分布式地理空间模型共享研究

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遥感学报 2009年第6期13卷 1060-1073页

作者：冯敏 LIU Sh.-guang Ned h. Euliss, Jr. 尹芳中国科学院地理科学与资源研究所北京100101 University of Maryland Institute for Advanced Computer Studies College Park MD 20742 USA U.S. Geological Survey Earth Resources Observation and Science Center Sioux Falls SD 57198 USA U. S. Geological Survey Northern Prairie Wildlife Research Center 8711 37th St SE Jamestown ND 58401 USA

传统的单机环境和封闭式网络环境由于有限的资源利用能力,难以充分支持分散地学数据、模型等资源的共享与应用集成。基于网络环境的信息交换特点,提出了分布式地理空间模型共享的服务体系。该体系以数据、模型、元数据等互操作要素为核... 详细信息

传统的单机环境和封闭式网络环境由于有限的资源利用能力,难以充分支持分散地学数据、模型等资源的共享与应用集成。基于网络环境的信息交换特点,提出了分布式地理空间模型共享的服务体系。该体系以数据、模型、元数据等互操作要素为核心,通过网络将数据、模型等网络节点进行开放式耦合。针对地理空间模型服务的互操作问题,提出了分布式环境下的模型共享服务交互接口,该接口定义了模型服务元数据、模型服务的交互操作、模型服务的通讯方式等交互规则,尽可能地降低模型服务与模型终端之间在数据交换、功能调用等方面的互操作困难。为了降低将模型共享为模型服务的实现难度,设计和开发了地理空间模型共享平台,并介绍了在该平台上发布地理空间模型的2种方法。最后介绍了研究成果在Prairie生态模型共享方面的应用实践。

关键词：地理空间模型模型共享分布式计算互操作