简介：ResultsofinelasticneutronscatteringexperinientsandabinitiomoleculardynamicssimulationsforGeTe一theparentcompoundofphase-changematerialsarereported.TheinelasticneutronspectraofGeTepowdersampleshavebeendeterminedinthetemperaturerangeextendingfrom300to700K.Thephononpeaksundergothermalshiftsresultingfromanharmoniceffectsbeingweakerforacousticthanopticmodes.AsmallconcentrationoffreechargecarriesarisingfromthepresenceofGe-vacancieswasfoundnottoaffectsignificantlytheneutronweightedphonondensitiesofstatesofGeTe.Thespectralpatternchangesqualitativelyacrossthestructuralphasetransition,butthelocalstructureofGeTeremainshardlyaffected,asconfirmedbytheanalysisoftemperaturedependenceofthepairdistributionfunctionobtainedfromabinitiomoleculardynamicsinvestigations.Thepresenttheoreticalstudiessupportinawideextentourexperimentalobservationsandalsothoseprovidedbylocalprobemethods.

简介：Ｐｈａｓｅ　Ｔｒａｎｓｉｔｉｏｎｓ　ｉｎ　Ｓｏｄｉｕｍ　ＣｌｕｓｔｅｒｓＰｈａｓｅＴｒａｎｓｉｔｉｏｎｓｉｎＳｏｄｉｕｍＣｌｕｓｔｅｒｓ￥ＺｈａｎｇＦｅｎｇｓｈｏｕ；Ｅ．ＳｕｒａｕｄａｎｄＲ．ＧｌｏｗｉｎｓｋｉＭｏｓｔｏｆｔｈｅｔｈｅｏｒｅｔｉｃａｌ...

简介：Thesolid-phasesynthesisofisoxazolineson2-polystyrylsulfonamidoethanolresinisreported.2-Polystyrylsuifonamidoethanolresin1wasreactedwithacryloylchloridetoafford2-polystyrylsulfonylamidoethylacrylateresin2,whichwasfurtherreactedwithbrominatedaldoximesby[3+2]cycioadditiontogiveisoxazolineresin4.Resin4wastreatedwithaqueous6mol/LHCIsolutiontoobtainisoxazolinesingoodyieldandpurity.

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简介：Anovelmethodforconvertinganarrayofout-of-phaselasersintooneofin-phaselasersthatcanbetightlyfocusedispresented.Themethodexploitssecond-harmonicgenerationandcanbeadaptedfordifferentlaserarraysgeometries.Experimentalandcalculatedresults,presentedfornegativelycoupledlasersformedinasquare,honeycomb,andtriangulargeometriesareingoodagreement.

简介：我们理论上学习光参量的扩大(OPA)或二根弄歪阶段的激光横梁抽的啁啾的脉搏OPA(OPCPA)的阶段特征。由于空间走离开，在two-beam-pumped，光参量的扩大(TBOPA)将两个都泵阶段失真是部分转了在单个晶体发信号以便降级信号横梁质量，它将在高精力的OPCPA更严肃。有补偿walkoff的水晶对的一种OPA配置为减少在第一个阶段经验丰富的信号阶段失真并且通过第二晶体保证二泵阶段失真的信号阶段独立人士被表明，因此维持信号横梁质量。如此的TBOPA类似于借助于消除它的敏感到泵横梁的阶段和数字的常规量激光放大器。[从作者抽象]

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简介：ＩｍｐｒｏｖｅｍｅｎｔｏｆＰｈａｓｅＭｅａｓｕｒｅｍｅｎｔＳｙｓｔｅｍｆｏｒＨＩＲＦＬ￥ＺｈａｎｇＪｉａｎｈｕａ；ＬｉＪｉａｎｄＨｕａｎｇＺｈｅｎｇｒｏｎｇＰｈａｓｅｍｅａｓｕｒｅｍｅｎｔｉｓｖｅｒｙｉｍｐｏｒｔａｎｔｆｏｒａｃｃｅｌｅｒａｔｏｒｏｐ...

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简介：Cahn-Hilliard阶段地的数字近似当模特儿因为二阶段的不可压缩的流动在这份报纸被考虑。几有效并且为联合非线性的Cahn-Hilliard阶段地的精力马厩时间discretization计划为匹配的密度盒子和变量的系统密度大小写被构造，并且被显示满足类似于连续精力法律的分离精力法律。

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简介：Moleculardynamics(MD)simulationsoftheconsecutivecompression-decompressioncyclesofhexagonalzincsulfide(wurtzite)nanoparticlespredictanirreversiblephasetransformationtothecubicpolymorph.Thephasetransformationcommencesatthecontactareabetweentheparticleandtheindenterandproceedswiththenumberofcompressioncycles.Dislocationsarevisibleforaparticlesizeabove5nm.ResultsfromwetgrindinganddrypowdercompressionexperimentsonacommercialwurtzitepigmentagreequalitativelywithMDsimulationpredictions.X-raydiffractionpatternsrevealthattheamountofcubicpolymorphinthecompressedsamplesincreaseswithpressureappliedtothepowder.Incomparisonwithpowdercompression,wetmillingleadstoamorepronouncedphasetransformation.Thisoccursbecausetheparticlesareexposedtoalargenumberofstresseventsbycollisionwiththegrindingmedia,whichleadstotheformationofdefectsandnewsurfacecrystallitesbyparticlefracture.AccordingtotheMDsimulations,phasetransformationisexpectedtooccurpreferentiallyinsurfacecrystallitesbecausetheyexperiencethehighestmechanicalload.Becauseofthephasetransformation,thewetgroundandcompressedsamplesexhibitalowerphotoluminescenceintensitythanthefeedmaterial.Incomparisonwithpowdercompression,millingreducesthephotoluminescenceintensitymoresubstantially.Thisoccursbecauseahigherdefectconcentrationisformed.Thedefectscontributetothephasetransformationandphotoluminescencequenching.

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简介：Thepurposeofthispaperistoprovetheuniformstabilityofmultidimensionalsubsonicphasetransitionssatisfyingtheviscosity-capillaritycriterioninavanderWaalsfluid,andfurthertoestablishthelocalexistenceofphasetransitionsolutions.

简介：Theso-called＂phasedifference＂iscommonlyintroducedasaphenomenologicalparameterinRamantensortheory,soastofittheexperimentaldatawell.Althoughphasedifferenceiswidelyrecognizedasanintrinsicpropertyofcrystals,itsphysicsstillremainsambiguous.Recently,Kranertetal.havepresentedanewformalismtoexplaintheoriginofphasedifferencetheoretically.Here,wesystematicallyconductedexperimentalresearchwithpolarphononsinwurtzitecrystals,theresultsofwhichstronglysurestthatthephasedifferenceshouldbepredeterminedinaRamantensor,ratherthanbetreatedasRamantensorelementstraditionallyorasanintrinsicproperty.OnthegroundsofpinpointingexistinglogicalflawsinRamantensorstudy,weprovidealogicallyclearparadigm.

简介：Thisworkbrieflysummarizedtherecentresearcheffortsmadeonthephaseheattransferprocessesinvolvingbiologicalaggregates,withparticularattentiononthecorrelationofaggregatestructureandstateofwaterwiththeprocessefficiency.Thephasechangeprocessesincludeboiling,drying,freezing,sintering,pyrolysis,andsupercriticalextraction,whiletheformerthreewerediscussedinsomedetail.

简介：PolymerPhysicsLaboratory,InstituteofChemistry,TheChineseAcademyofSciences,Beijing100080,China