简介：AdeuteronpossessesacoulombpotentialbarrierwithmaximumUmax≈10^6eV(atro=1.51×10^-13cm)aroundhim.Soprerequisitetodirectcollideandexcitenuclearfusionreactionfortwodeuteronsistopenetratetoallofoppositebarrier.

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简介：固体加速长度在一张冷稠密的运输病床上被调查(0.10中间的

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简介：我们实现在我们87Rb空间寒冷原子钟，它在单程的模式操作。几修正在我们的以前的物理、光的系统上被做。在最高的察觉地区的有效原子信号与87%被增加到2.5次抽效率。冷原子云的温度被1.4K增加。我们在抽的激光紧张和detuning上学习有效信号获得和抽的效率的依赖。转变的效果被讨论。这种技术可以在未来空间寒冷原子钟被使用。

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简介：我们在场在高度反响的媒介的极端慢的明亮、黑暗的光solitons的形成上的系统的研究。由调查，四一生拓宽了原子系统，即，三状态的A类型和串联类型计划，和四状态的N类型和cascade-typeschemes，我们证明在冷原子系统的如此的极端慢的soh'tons的形成是相当通用的现象。

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简介：Vanadiumalloys,especiallythatofV4Cr4Ti,aresupposedasthepromisingcandidatestructuralmaterialforfusionapplicationsfortheirgoodthermalproperties,hightemperaturestrengthandtheinherentlowactivationcharacteristics.However,inrecent

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简介：Cold-stretchedpressurevesselsfromausteniticstainlesssteels(ASS)arewidelyusedforstorageandtransportationofliquefiedgases,andhavesuchadvantagesasthinwallandlightweight.Fatigueisanimportantconcerninthesepressurevessels,whicharesubjectedtoalternativeloads.Eventhoughseveralcodesandstandardshaveguidelinesonthesepressurevessels,therearenorelevantdesignmethodsonfatiguefailure.TounderstandthefatiguepropertiesofASS1.4301(equivalentsincludeUNSS30400andAISI304)insolution-annealed(SA)andcold-stretchedconditions(9%strainlevel)andtheresponseoffatiguepropertiestocoldstretching(CS),low-cyclefatigue(LCF)testswereperformedatroomtemperature,withtotalstrainamplitudesrangingfrom-.4%to-.8%.Martensitetransformationsweremeasuredduringthetests.Comparisonsoncyclicstressresponse,cyclicstress-strainbehavior,andfatiguelifewerecarriedoutbetweenSAandCSmaterials.ResultsshowthatCSreducestheinitialhardeningstage,butprolongsthesofteningperiodinthecyclicstressresponse.Martensitetransformationhelpsformastableregimeandsubsequentsecondaryhardening.Thestressesofmonotonicandcyclicstress-straincurvesareimprovedbyCS,whichleadstoalowerplasticstrainandamuchhigherelasticstrain.ThefatigueresistanceoftheCSmaterialisbetterthanthatoftheSAmaterial,whichisapproximately1?03to2?04cycles.TheS-NcurveoftheASMEstandardforASSiscomparedwiththefatiguedataandisjustifiedtobesuitableforthefatiguedesignofcold-stretchedpressurevessels.However,consideringtheCSmaterialhasabetterfatigueresistance,theS-Ncurvewillbemoreconservative.ThepresentstudywouldbehelpfulinmakingfulluseoftheadvantagesofCStodevelopanewS-Ncurveforfatiguedesignofcold-stretchedpressurevessels.

简介：Wedemonstratetheefficientgenerationofcoherentlightinafour-leveldouble-cascadeatomicmediumbycontinuous-wavelow-intensitylaserradiation.Wederivethecorrespondingexplicitanalyticalexpressionsforthegeneratedfour-wavemixing(FWM)field.DependenciesoftheintensityofthegenerateFWMfieldonthepropagationdistance,ontheinput-waveintensity,andonthephotondetuningareinvestigated.Toconclude,wealsogiveabriefdiscussionontheexperimentalrealizationoftheproposedscheme.

简介：Thispaperhasdevelopedandcharacterizedamethodtoproduceavelocity-tunable87Rbcoldatomicsourceforatomicinterferometryapplication.Usingahighspeedfluorescenceimagingtechnology,itreportsthatthedynamicprocessoftheatomicsourceformationisobservedandthesourceperformancesincludingthefluxandtheinitialvelocityarecharacterized.Atunableatomicsourcewiththeinitialvelocityof1.4～2.6m/sandtheatomicsourcefluxof2×108～6×109atoms/shasbeenobtainedwiththebuiltexperimentalsetup.

简介：Pd-containingionicliquid（IL）1-hexyl-3-methylimidazoliumtetrafluoroborate（C6MIMBF4）immobilizedon7-Al2O3（Pd-IL/γ-Al2O3）waspreparedandcharacterizedbyFouriertransforminfraredspectroscopy（FTIR）,scanningelectronmicroscopy（SEM）andBrunauer-Emmett-Teller（BET）analysis.TheinfluencesofC6MIMBF4loadingandPdonmethaneconversiontoC2hydrocarbonsundercoldplasmawereinvestigated.FTIRandSEManalysesindicatedthatC6MIMBF4hadbeensuccessfullyimmobilizedon7-Al2O3andtheC6MIMBF4showedexcellentstabilityundercoldplasma.TheresultsofBETandmethaneconversionshowedthatwiththeincreaseinimmobilizationamountofC6MIMBF4ontoγ-Al2O3,thespecificsurfaceareaandporevolumeofIL/γ-Al2O3decreased,whiletheselectivityandyieldofC2hydrocarbonsincreased.TheselectivityofC2hydrocarbonswas94.6%whentheloadingofC6MIMBF4was40%,andthepercentageofC2H4inC2hydrocarbonswasashighas64%whenusingPd-IL/γ-Al2O3asacatalystwithnoconventionalthermalreductiontreatment.Opticalemissionspectra（OES）fromthecoldplasmareactorduringmethaneconversionwerealsostudied.TheresultsindicatedthattheintensityoftheC2,CH,H,andCactivespeciesfrommethaneandhydrogendecompositionincreasedwhenIL/γ-Al2O3orPd-IL/γ-Al2O3wasintroducedintotheplasmasystem.BasedontheanalysesofthegasproductandOESspectra,itcanbeconcludedthatthesurfacecatalyzedreactionsbetweenplasmaandionicliquidwereveryimportantforthereductionofPd2+andtheformationofC2H4.

简介：Inthepresentpapertheproblemofnonlinearinteractionoftwomildly-relativisticcircularlypolarizedlasersinacoldplasmaisstudiedinordertoinvestigateelectromagneticallyinducedtransparency(EIT).Basedonarelativistickineticmodel,byexpansionofrelativisticLorentzfactorintermsoflasersamplitude,weobtainthecouplednonlineardispersionrelations.Itisobservedthatduetoresonanceinthesecondharmonicofplasmabeat-wave,thenewEITpass-bandiscreatedinthehighintensitiesoflasers.Theeffectofamplitudeandfrequencyvariationonthedispersionisnumericallyinvestigated.

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