简介：为高功率脉冲功率装置设计了4MV同轴-三平板型水介质自击穿开关作为脉冲输出开关。脉冲输出开关指在脉冲功率装置中脉冲形成线输出端的开关，它是脉冲形成线和传输线的连接部件，对传输电脉冲进行二次压缩。脉冲输出开关常常是自击穿开关，由于其前面的主开关对Marx发生器输出电脉冲进行了初步压缩，脉冲输出开关的输入脉冲前沿上升较快，故脉冲输出开关常常是多通道开关。

简介：Theabinitiomolecularorbitalmethodisemployedtostudytheenantioselectivereductionofacetophenonewithboranecatalyzedbythiszolidino[3,4-c]oxazaborolidine.Computationresultshowsthatthecontrollingstepforthereductionisthedecompositionofthecatalyst-alkoxyboraneadductandthereductionleadstoS-alcohols.ThetransitionatateofthehydridetransferfromtheboranemoietytothecarbonylcarbonofacetophenoneisatwistedchairstructurewithaB(2)-N(3)-BBH3-HBH3-CCo-OCO6-memberedring.

简介：Grapheneistwodimensionalmaterialswhichismadeofhoneycombedcarbonatoms.Itattractsextensiveinterestsforitswonderfulcharacteristicsthatmakethegrapheneapotentialcandidateinfieldsofmicroelectronicsproduction,moleculedetection,desalinationandDNAsequencing.Highlychargedion(HCI)hashugepotentialenergyforpeelingoffelectrons.Wheninteractingwithsolidsurface,theHCIdistortedthesolidlatticeviapotentialdepositionandthenthenanostructureswereformedonthesolidsurface.TheHCIwasexpectedasatoolforsurfacemodification.Inthiswork,HOPGandgraphemewereirradiatedwithXeq+andArq+ions.ThetypicalRamanspectraofgrapheneandHOPGirradiatedwithhighlychargedionswereshowninFig.1.TheDpeakappearedat1335cm??1onthespectraofgrapheneirradiatedwithhighlychargedions.TheintensityofDpeakincreasedwithfluence.TheratioofintensityofDpeaktothatofGpeakvariedwithfluenceinFig.2.Theratioroselinearlywiththesquarerootoffluencewhenfluencewaslow.Theratiosaturatedwhentheirradiationfluencewashigh.Thecriticalfluencedependedonthechargestateofion.Thehigherchargestateitwas,thelowercriticalfluenceitwouldbe.

简介：ＭｉｃｒｏｄｏｓｉｍｅｔｒｉｃＳｐｅｃｔｒｕｍａｎｄＲａｄｉａｌＤｏｓｅＤｉｓｔｒｉｂｕｔｉｏｎｏｆ２３９ＰｎｏｒＲａｙｉｎＣＨ４Ｇａｓ￥ＺｈｕＬｉａｎｆａｎｇ；ＬｉＸｕｅｋａｎ；ＣｈｅｎＸｕｅｂｉｎｇ；ＨｅＹｕｓｈｅｎｇ；ＳｕＹｏｕｗｕａｎｄ...

简介：Duetolowactivationcharacteristics,desirablehigh-temperaturestrength,goodresistancetoradiationdamageandusablefabricationproperties,vanadium(V)alloysareattractivecandidatestructuralmaterialsforfusionreactors[1].Irradiationinducedhardening/embrittlementatlowtemperatureisamajorproblemforthematerialsapplicationinfusionreactor[2].Inthisstudy,H/Heionswithvariousenergieswereusedtoirradiateapurevanadium(V)andaValloy(V-4Ti)toobtainadamageplateaufromsamplesurfacetothedepthof1.5m,asshowninFig.1[3].Thedetailsofirradiationparameters(energies,fluences)forHandHeionsareshowninTable1.NanoindentationwasperformedtoinvestigatethehardeningbehaviorofV-4TialloyandpureVunderirradiation.

简介：

简介：Wedemonstratedamonolithic,compact,diode-pumpedgain-switchedNd:YVO4laserat1.064μmwavelengthwithcontrollablerepetitionrateof1Hzto25kHz.Stablegain-switchedpulsetrainwithmaximumrepetitionrateof25kHzandpulsewidthof16nswasobtained.

简介：Recently,Cristofaro-GardinerandHutchingsprovedthatthereexistatleasttwoclosedcharacteristicsoneverycompactstar-shapedhypersufaceinR~4.ThenGinzburg,Hein,Hryniewicz,andMacarinigavethisresultasecondproof.Inthispaper,wegiveitathirdproofbyusingindexiterationtheory,resonanceidentitiesofclosedcharacteristicsandaremarkabletheoremofGinzburgetal.

简介：ＳＹＮＴＨＥＳＩＳＯＦ３－ＡＲＹＬ－１（２Ｈ，４Ｈ）ＡＣＲＩＤＯＮＥＳＡＮＤＴＨＥＩＲＤＥＲＩＶＡＴＩＶＥＳ￥ＲｏｎｇＹＩＮ；ＧｕａｎｇＦａｎＨＡＮ；ＹｕＴｉａｎＬＩ（ＤｅｐａｒｔｍｅｎｔｏｆＭｅｄｉｃａｌＬａｂｏｒａｔｏｒｙ，ＪｉｌｉｎＭｅｄｉｅａ...

简介：结合吲哚的增加到许多，不饱和的酉同类(chalcones)在超声的条件下面在房间温度由KHSO4的催化数量调停了负担得起相应迈克尔使内收在对优秀收益好被报导。

简介：Thenanomaterialsoftenexhibitveryinterestingelectrical,optical,magnetic,andchemicalproperties,whichcannotbeachievedbytheirbulkcounterparts[1-7].Thedevelopmentofuniformnanometersizedparticleshasbeenintensivelypursuedbecauseoftheirtechnologicalandfundamentalscientificimportance[8-15].Itissignificantthatnanostructuredmaterialscanbecontrollablyassembledintotherequiredgeometryontosubstrates,becomingthebasisofthenextgenerationofcomponentsanddevices[16-31].Thedevelopmentofnewmethodsandstrategiesfororganizingthenanoparticlebasicbuildingblocksintothedesiredstructuresisrequired.Superlatticesmadefromthesebuildingblocksgiveustheopportunitytostudynotonlythepropertiesoftheindividualbuildingblocks,butalsocollectiveeffects.Thesuperparamagneticironoxidenanocrystals(NCs)havebeenusedinthefieldsofbio-medicine,ferrofluids,refrigerationsystem,catalysis,particularlyinmagneticresonanceimaging,tissueengineering,anddrugdeliveryapplications[32-42].

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简介：Graphitic碳氮化物(g-C3有向在可见轻照耀下面的4-nitrophenol的降级的高photocatalytic活动的N4)被蚀刻的HCl准备由氨中立化列在后面。准备样品的结构，形态学，表面区域，和photocatalytic性质被学习。在处理以后，g-C3N4从几测微计减少了到几百纳米，和g-C3N4从11.5 增加了；m2/g到115 ；m2/g。同时，g-C3N4显著地在可见的光下面向4-nitrophenol的降级在处理以后被改进照耀。小粒子g-C3N4是5.7次体积g-C3为水处理和环境补习为未来应用使它成为有希望的可见轻光催化剂的N4,。

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

简介：Highlychargedions(HCIs)carryingamountofpotentialenergywillproducesomenewphysicalphenomenabecausethepotentialenergywillbedepositedintoaverysmallvolumewithinaveryshorttime.WewouldapplythecalorimetricmethodtostudytheenergydepositionofHCIs[1;2].Hereinweintroducethenewsetupforcalorimetricmeasurementforthepotentialenergydepositionofhighlychargedionsat320kVHighlyChargedIonsPhysicsExperimentalPlatform.Thesetupwasconstructedby3parts:theDewar,theelectricaltemperaturecontrollerandthemainpart.ThediamondtargetwasconnectedtotheLN2cooledheatsinkby4copperwiresandaPlatinumtemperaturesensorwasgluedtotherearsideofthetarget.AsshowninFig.1.

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简介：Two-dimensional(2-D)BiVO4nanosheets-graphene(GR)compositeswithdifferentweightadditionratiosofGRhavebeenpreparedviaafacilewetchemistryprocess.X-raydiffraction(XRD),Ramanspectra,X-rayphotoelectronspectra(XPS),UV-visdiffusereflectancespectra(DRS),field-emissionscanningelectronmicroscopy(FE-SEM),transmissionelectronmicroscopy(TEM),nitrogenadsorption-desorption,transientphotocurrentresponseandphotoluminescence(PL)spectrawereemployedtodeterminethepropertiesofthesamples.ItisfoundthatBiVO4nanosheetscouldpavewellonthesurfaceofgraphenesheets.BiVO4nanosheets-GRcompositeswithaproperadditionamountofGRexhibitedhigherphotocatalyticactivitythanbareBiVO4nanosheetstowardliquid-phasedegradationofrhodamineB(RhB)andmethylorange(MO)undervisiblelightirradiation.TheenhancementofphotocatalyticactivitiesofBiVO4nanosheets-GRcompositescanbeattributedtotheeffectiveseparationofphotoexcitedelectron-holepairs.Thisworknotonlyprovidesasimplestrategyforfabricatingspecific2-Dsemiconductor-2-DGRcomposites,butalsoopensanewwindowofsuch2-Dsemiconductor-2-DGRcompositesasvisiblelightphotocatalyststowardanimprovedvisiblelightphotoactivityinpurifyingpollutedwaterresources.

简介：Thedifferentregioselectiveandstereoselectiveproductswereobtainedbythereductionofstigmast-4,22-dien-3,6-dionewithNaBH4-CH3OHwhendifferentkindsofmetalionswasaddedtothereaction.

简介：Well-dispersedBaSO4nanoparticlesweresynthesizedinthepresenceofsodiumpolyacrylate（PAAS）byasimpleprecipitationmethod,withBaCl2and（NH4）2SO4asreactants.ThedifferentrolesperformedbyPAASinthesynthesisofBaSO4nanoparticleswereinvestigatedusingX-raydiffractometry,Fouriertransforminfraredspectroscopy,andtransmissionelectronmicroscopy.TheresultsindicatethattheassynthesizedBaSO4nanoparticlesweresphereswithanaveragediameterof30nmandthattheirsurfaceswereaffectedbythePAAS.Underatypicalprocedureemployed,PAASreactedwithBaCl2toyieldanintermediate,servingasacontrolreleasingagentandseparatingthenucleationandcrystalgrowthprocessesoftheBaSO4nuclei.DuringformationoftheBaSO4nanospheres,theintermediateslowlydissolvedandreleasedbariumandpolyacrylateions,inhibitingthegrowthandaggregationofnewlyformedBaSO4seedsandresultinginparticlesofnarrowdiameterdistributionandimproveddispersibility.Moreover,thesepolyacrylateionsfurthermodifiedthesurfacesoftheBaSO4nanoparticles.

简介：ＳＹＮＴＨＥＳＩＳ　ＡＮＤ　ＳＰＥＣＴＲＡ　ＳＴＵＤＩＥＳ　ＯＦ　ＴＲＡＮＳＩＴＩＯＮ　ＭＥＴＡＬ　ＣＯＭＰＬＥＸＥＳ　ＤＥＲＩＶＥＤ　ＦＲＯＭ　２，　４－ＤＩＮＩＴＲＯＰＨＥＮＹＬ　ＨＹＤＲＡＺＩＮＥＳＹＮＴＨＥＳＩＳＡＮＤＳＰＥＣＴＲＡＳＴＵＤＩ...