简介：Vanadiumalloys(V-Cr-Tiseries)areimportantcandidatematerialsforblanketcomponentsoffusionreactorsduetotheirlowactivationandhighstrengthatelevatedtemperatures.Low-temperatureirradiationembrittlementdeterminestheoperationtemperaturelimitofVanadiumalloysfortheapplicationtostructuralmaterialsoffusionreactorsirradiationresponseofvanadiumalloysneedstobeclarifiedfortheirapplication.Inthepresentstudy,specimensoftwoalloys(V-4Cr-4TiandV-5Cr-5Ti)wereirradiatedwithenergeticHeionsandheavyionstounderstandhardeningofthealloysduetoheliumaccumulationandcascadedamageproduction.

简介：自然界中存在着许多含义深远的常数，黄金数只是它们当中的一员。黄金数起源于人们对于黄金分割问题的研究，这种研究可以追溯到两千多年前的古希腊时期。设单位线段ＡＢ被点Ｐ分为长度不等的两段，且令小段长度与大段长度之比恰好等于大段长度与线段全长之比。我们把线段...

简介：Inthispaper,AgBF4/[emim][BF4]supportedionicliquidmembranes(SILMs)werepreparedsuccessfullyforCO/N2separationusingnitrogenpressureimmobilizationprocedures.TheincorporationofAgBF4coulddecreasemembraneweightloss,improvethepressure-resistantability,andkeepthecriticalpressure(0.45MPa)oftheSILMs.ThehighviscosityandundissolvedAgBF4solidsinmembraneliquidwoulddisturbgasmoleculartransportthroughmembraneandgiverisetothegastransportresistance.Therefore,thegaspermeabilitydecreasedremarkablywithincreasingAgBF4carriercontentinthemembrane.WhenthemolarratioofAgBF4to[emim][BF4]increasedfrom0:1to0.3:1,theCO/N2selectivityoftheSILMsshowedagreatincreasefrom~1to~9at20°Cand0.4MPa,suggestingthatAgBF4wasaneffectivecarrierforCOfacilitatedtransport.ThepermeabilitiesofN2andCOincreasedathighertransmembranepressure,indicatingthatmoleculartransportwoulddominatethetransportprocessathighpressure.Thetemperature-dependentgaspermeabilityfollowedtheArrheniusequation.Moreover,thedifferencesbetweentheactivationenergiesofCOandN2becamelargerafterintroducingAgBF4,resultinginmoreobviousdecreaseintheCO/N2selectivityathigheroperatingtemperature.

简介：Theone-dimensionalsuper-symmetricferromagnetict-JmodelisstudiedviathethermalBetheansatz.AnalyticexpressionsofthefreeenergyforT→Oareobtained.AnewcriticalbehaviourbeyondtheuniversalclassofLuttingerLiquidsisfoundinthissystem.

简介：TheGAUDIsoftwareframeworkistobeusedforallevent-processingapplicationsintheLHCbexperiment.TheGEANT4toolkithasbeenintegratedintoGAUDItoformthebasisoftheLHCbsimulationprogramGAUSS.Thebenefitsofthisapproacharethatitpermitsre-useofbasicservices,suchaspersistency,interactivityanddatavisualization,aswellasphysicsalgorithmsthatwereoriginallydevelopedinthecontextofthereconstructionandanalysisprograms.FollowingtheGAUDIphilosophy,theintegrationhasbeenachievedbydevelopinganumberofserviceswithabstractinterfacesthatcanbepluggedinatrun-time.Wedescribetheoveralldesignanddetailsofthecomponentsforinterfacingthedetectorgeometry,theprimaryinteractionandtheoutputfromtrackingparticlesthroughthedetector.

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简介：Thispaperinvestigatesthetemperaturefielddistributionandthermalfocallengthwithinalaserdiodearray(LDA)end-pumpedYVO4/Nd:YVO4rectangularcompositecrystal.AgeneralexpressionofthetemperaturefielddistributionwithintheNd:YVO4rectangularcrystalwasobtainedbyanalysingthecharacteristicsoftheNd:YVO4crystalandsolvingthePoissonequationwithboundaryconditions.ThetemperaturefielddistributionsintheNd:YVO4rectangularcrystalfortheYVO4/Nd:YVO4compositecrystalandtheNd:YVO4singlecrystalareresearchedrespec-tively.CalculatingthethermalfocallengthwithintheNd:YVO4rectangularcrystalwasdonebyananalysisoftheadditionalopticalpathdifferences(OPD)causedbyheat,whichwasveryidenticalwithexperimentalresultsinthispaper.ResearchresultsshowthatthemaximumrelativetemperatureontherearfaceoftheNd:YVO4crystalinthecompositecrystalis150Kandthethermalfocallengthis35.7mmwhentheoutputpoweroftheLDAis22W.Inthesamecircumstances,theexperimentalvalueofthethermalfocallengthis37.4mm.Sotherelativeerrorbetweenthetheoreticalanalysisandtheexperimentalresultisonly4.5%.Withthesameconditions,thethermalfocallengthoftheNd:YVO4singlecrystalis18.5mm.SotherelativerateofthethermalfocallengthbetweentheYVO4/Nd:YVO4crystalandtheNd:YVO4crystalis93%.So,thethermalstabilityoftheoutputpowerandthebeamqualityoftheYVO4/Nd:YVO4laserismoreadvantageousthanthelaserwithNd:YVO4singlecrystal.

简介：在物理学习中，常会遇到电表示数变化类题型，这类题型考查了学生对动态电路的分析与判断能力，还考查了电学规律、物理公式的运用以及物理方法的使用，是中考的热点之一．但由于题目难度较大，致使很多考生不能正确解答，甚至无从下手．现就这一问题结合常见题型，分类解析．

简介：电表示数变化题型是初中物理教学的一个难点，这类题主要是利用滑动变阻器来改变电阻的大小，从而改变电流的大小，或者是利用开关的通断来改变电路的连接，从而引起电流的变化．下面通过几个例子谈一谈这类题的解题思路．

简介：牛顿环实验中确定最佳测量环数是实验和计算的一个重要方面，本文首先确定实验要求的相对误差，然后运用误差理论得到最佳测量环数，其结果与文献采用的方法相一致。该方法的结果是简化测量和计算工作量的有效方法，提供了物理实验测量和计算理论分析的一种方法。

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简介：在这份报纸，我们学习稳定性局部地旋转地对称(LRS)Bianchi我在通过阶段空间分析的f(T)重力的宇宙模型。我们假设f(T)严肃能被当作象完美的液体一样表现的有效黑暗精力，并且建议在无压力的物质以及黑暗精力之间有相互作用。我们构造方程的相应自治系统检查模型的稳定性因为非幽灵，真空和幽灵分阶段执行。批评的点作为与相比在幽灵阶段仍然保持更稳定，这被结束非幽灵和真空盒子。最后，我们通过一些宇宙论的参数讨论模型的宇宙论的行为。

简介：ItisnotedthattheITER-FEATisanexperimentalreactorsystemwithaspectratioA=3whilethesphericalapproachhasaspectrationear1.4thatallowsformuchhigherstablebetavaluebuttheengineeringaspectsareratherformidable.Recently,

简介：AKerr-lens,mode-lockedYVO4∕Nd:YVO4lasercoupledwithanacousto-opticmodulator（AOM）Q-switchingnear1064nmwasemployedtopumpanintracavityKTiOPO4（KTP）opticalparametricoscillator.Asubnanosecondsignalwavenear1572nmwithlowrepetitionratewasrealized.AtanAOMrepetitionrateof8kHz,themaximumoutputpowerwas165mW.Thehighestaveragepulseenergy,theshortestduration,andthehighestpeakpowerofamode-lockingsignalpulsewereestimatedtobe～10.3μJ,～120ps,and～82kW,respectively.

简介：Geant4LowEnergyElectromagneticpackageProvidesaprecisetreatmentofelectromagneticinterationsofparticleswithmatterdowntoverylowenergies(250oVforelectronsandphotons,<1keVforhadronsandions),Itincludesaverietyofmodelsfortheelectromagneticprocessesofelectrons,photons,hadronsandions,takingintoaccountadvancefeatures,suchasshelleffectsandeffectsduetochargedependence.Thecomprehensivesetofparticletypesitcanhandle,thevarietyofmodelingapproachesandtheextendedcoverageofenergyrangemakethispackageauniquetoolamongMonteCarlocodesonthemarket,andofrelevancetoserveralexperimentaldomainsinHIEP,astroparticlephysics,spacescienceandbiomedicalstudies.

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简介：采用四元数方法对欧拉位移定理进行证明。

简介：1．对比热容的概念缺乏理解例1由Q=cm（t-t0）可得：c=Q／m（t-t0），关于同一种物质的比热容c．下列说法正确的是（）

简介：本文介绍由三片集成块ＣＳ８２０４、ＷＥ９１４０Ａ、ＴＥＡ１０６１组成的典型电话机电路，主要分析电话机的电源供给电路、振铃电路、拨号电路和通话电路。

简介：用多光子光电效应理论简要分析了多光子光电效应实验,指出多光子光电效应满足nhν=12mv20+φ(hν0)且nν/ν0=4/3。同时用微扰法及单光子光电效应理论分析了H原子电离问题,结果表明也是当ω/ω0=4/3时电离几率最大