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212 个结果
  • 简介:TheenergyresponsesofKaoftwotypesofcylindricalG-Mcountertubeswerecalculatedusinganelectron-photoncascadeMonteCarlocode,EGS4.OnetypeoftheG-McountertubeswasGJ4401(sensitivelength9cm,diameter1cm),theotherwasJ5(sensitivelength2cm,diameter0.3cm),therestrictedsamplingtechniqueofsourcephotonwasused.Goodtendencyagreementsbetweenthesimulationsandexperimentswereachievedforgammaradiationwithenergiesrangingfrom40keVto1.25MeV.ForGJ4401,thedifferenceofresponsebetweensimulationsandexperimentsat662keVwas34%andforJ5thedifferencewas27%.

  • 标签: G-M计数器 能量响应计算 MONTE Carlo法
  • 简介:Two-dimensional(2D)graphitecarbonnitride(g-C3N4)nanosheetshavebeensuccessfullyusedasasaturableabsorber(SA)inapassivelyQ-switchedNd:LLFlaserat1.3μmforthefirsttime,tothebestofourknowledge.Underanincidentpumppowerof9.97W,theshortestpulsedurationof275nswasacquiredwithoutputpowerof0.96Wandpulserepetitionrateof154kHz,resultinginapulseenergyof6.2μJ.Inaddition,thesaturableabsorptionbehaviorsofzero-dimensional12nmg-C3N4nanoparticles(g-C3N4-NPs)andthree-dimensionalorderedmesoporousg-C3N4(mpg-C3N4)werealsoobserved,althoughtheirmorphologyandstructurewerequitedifferentfrom2Dg-C3N4.Theexperimentalresultsintroducethepotentialapplicationofg-C3N4nanomaterialsasSAsinQ-switchedlasers.

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  • 简介:在一篇最近的文章[物理信A372(2008)417],王等。建议了一个方法,它被叫(G'/G)扩大方法,寻找非线性的进化方程的旅行波浪答案。包含KdV方程,mKdV方程,变体Boussinesq方程,和Hirota一种奶油色的陶器方程的参数的旅行波浪解决方案被使用这个方法获得。他们想(G'/G)扩大方法是一个新方法和许多非线性的进化方程的更多的旅行波浪答案能被获得。在这篇论文,我们将证明(G'/G)扩大方法等价于扩大tanh功能方法。

  • 标签: BOUSSINESQ方程 非线性演化方程 函数法 展开法 tanh函数方法 MKDV方程
  • 简介:Weexperimentallydemonstratea4×4nonblockingsiliconthermo-optic(TO)switchfabricconsistingofthreestagesoftunablegeneralizedMach–Zehnderinterferometers.All24routingstatesfornonblockingswitchingarecharacterized.Thedevice’sfootprintis4.6mm×1.0mm.Measurementsshowthattheworstcrosstalkofallswitchingstatesis-7.2dB.Theon-chipinsertionlossisintherangeof3.7–13.1dB.TheaverageTOswitchingpowerconsumptionis104.8mW.

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  • 简介:Thesuppressionoftherecombinationofelectronsandholes(e–h)andtheenhancementofthelightabsorptionofsemiconductorsaretwokeypointstowardefficientphotocatalyticdegradation.Here,wereportafew-layerg-C3N4/α-MoO3nanoneedles(flg-C3N4/α-MoO3NNs)all-solid-stateZ-schememechanismphotocatalystsynthesizedviaatypicalhydrothermalmethodinacontrolledmanner.Therecombinationofthephoto-inducede–hpairscouldbeeffectivelyrestrainedbytheZ-schemepassagewaybetweentheflg-C3N4andα-MoO3NNsinthecomposite,whichcouldalsopromiseahighredoxabilitytodegradepollutants.Anditbecamepossibleforthepreparedphotocatalysttoabsorblightinawiderangeofwavelengths.Thedetailedmechanismwasstudiedbyelectronspin-resonancespectroscopy(ESR).Thelow-dimensionalnanostructureofthetwoconstituents(α-MoO3NNswithone-dimensionalstructureandflg-C3N4withtwo-dimensionalstructure)endowedthecompositewithvarietiesofexcellentphysicochemicalproperties,whichfacilitatedthetransferanddiffusionofthephotoelectronsandincreasedthespecificsurfaceareaandtheactivesites.The10wt%flg-C3N4/α-MoO3NNsshowedthebestphotocatalyticperformancetowardRhBdegradation,therateofwhichwas71.86%,~2.6timeshigherthanthatofα-MoO3NNs.

  • 标签: Flg-C3N4 α-MoO3 NANONEEDLES ALL-SOLID-STATE Z-scheme mechanism
  • 简介:On △I= Bifurcation PhenomenaOn△I=BifurcationPhenomena¥ZhangJingye;YangSunandMikeGuidryTheexperiments-bythenew7--raydetector...

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  • 简介:我们介绍自发的对称碎在Pati之间的acouplingbetween的顺序—Salam和电镀物品弱对称苏(4)_(PS)直接X苏(4)_(EW)可伸缩以便在宏大统一精力在联合常数之中建立一种算术地一致的关系。与减已知的夸克和雷普顿的雷普顿量数字那里的酒吧的价值,由传递includingright的中微子,我们能在直到电磁的U(1)_(他们)的层次放大的不同精力发现混合角度关系。

  • 标签: 电弱模型 统一化对称 规范对称 耦合常数
  • 简介:Therearemoreandmorecountriestoakeanefforttothestudiesofvanadiumalloyforfusionapplication.NIFSinJapanhasrecentlydevelopedan80kgheatV4Cr4Tialloy(NIFS-heat2)aftertheproductionofa500kgscaleV4Cr4TiinU.S.severalyearsago.PropertyevaluationofthealloyhasbeenputintoaninternationalcollaborationprogramunderthecoordinationofIEA(InternationalEnergyAgency).SWIPhasjoinedthecollabrationonthehydrogenembrittlementresistanceevaluationofthealloyt.

  • 标签: 钒合金 氢脆变 阻抗 NIFS
  • 简介:ThedevelopmentoftheGEANT4applicationforALICEsimulationwithinthealiRootframeworkisdescribed.TheG3toG4approachadoptedbyALICEcollaborationisexplained.Theoverviewofthedesign,presentimplementationandfunctionalityispresentedandtheremainingproblemsarediscussed.

  • 标签: ALICE实验 软件开发 GEANT4
  • 简介:SinceitserliestyearsofR&D[1],theGEANT4simulationtoolkithasbeendevelopedfollowingsoftwareprocessstandardswhichdictatedtheoverallevolutionoftheproject.Thecomplexityofthesoftwareinvolved,thewideareasofapplicationofthesoftwareproduct,thehugeamountofcodeandCategorycomplexity,thesizeanddistributednatureoftheCollaborationitselfareallingredientswhichinvolveandcorrelatetogetherawidevarietyofsoftwareprocesses.Althoughin"production"andavailabletothepublicsinceDecember1998,theGEANT4softwareproduct[1]includesCategoryDomainswhicharestillunderactivedevelopment.Thereforetheyrequiredifferenttreatmentalsointermsofimprovementofthedevelopmentcycle,system,testingandusersupport,ThisarticleismeanttodescribesomeofthesoftwareprocessesastheyareappliedinGEANT4forbothdevelopment,testingandmaintenanceofthesoftware.

  • 标签: GEANT4 软件处理 软件开发
  • 简介:Vanadiumalloys(V-Cr-Tiseries)areimportantcandidatematerialsforblanketcomponentsoffusionreactorsduetotheirlowactivationandhighstrengthatelevatedtemperatures.Low-temperatureirradiationembrittlementdeterminestheoperationtemperaturelimitofVanadiumalloysfortheapplicationtostructuralmaterialsoffusionreactorsirradiationresponseofvanadiumalloysneedstobeclarifiedfortheirapplication.Inthepresentstudy,specimensoftwoalloys(V-4Cr-4TiandV-5Cr-5Ti)wereirradiatedwithenergeticHeionsandheavyionstounderstandhardeningofthealloysduetoheliumaccumulationandcascadedamageproduction.

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  • 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.

  • 标签: SUPPORTED IONIC liquid membranes [BF4] AgBF4
  • 简介:TheGAUDIsoftwareframeworkistobeusedforallevent-processingapplicationsintheLHCbexperiment.TheGEANT4toolkithasbeenintegratedintoGAUDItoformthebasisoftheLHCbsimulationprogramGAUSS.Thebenefitsofthisapproacharethatitpermitsre-useofbasicservices,suchaspersistency,interactivityanddatavisualization,aswellasphysicsalgorithmsthatwereoriginallydevelopedinthecontextofthereconstructionandanalysisprograms.FollowingtheGAUDIphilosophy,theintegrationhasbeenachievedbydevelopinganumberofserviceswithabstractinterfacesthatcanbepluggedinatrun-time.Wedescribetheoveralldesignanddetailsofthecomponentsforinterfacingthedetectorgeometry,theprimaryinteractionandtheoutputfromtrackingparticlesthroughthedetector.

  • 标签: GAUDI软件 数据处理 事件模拟