学科分类
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368 个结果
  • 简介:Theionsaturationcurrentisveryimportantinprobetheory,whichcanbeusedtomeasuretheelectrontem-peratureandthefloatingpotential.Inthiswork,theeffectsofenergeticionsontheionsaturationcurrentarestudiedviaparticle-in-cellsimulations.Itisfoundthattheenergeticionsandbackgroundionscanbetreatedseparatelyasdifferentspecies,andthevsatisfytheirindividualBohmcriterionatthesheathedge.

  • 标签: ENERGETIC ION EFFECTS the ION SATURATION
  • 简介:Theself-diffusionofEu^3+ioninporousresinsD72andD751wasstudiedbyisotopeexchangereaction.ApplyingKataoka'sbidisperseporemodel,theintraparticleeffectivediffusivityDewereresolvedintoasoliddiffusivityDgandamacroporediffusivityDp.TheexperimentsshowthatDe.DpandDgallincreasewiththeincreaseofreactiontemperature;theresponseDpandDgofD751resinissmallerthanthatofD72resin;thediffusivityofEu^3+ioninsolutionislargerthanDp,whichleadstotheconclusionthatthediffusionofionintheporeofresincannotcompletelybeequaltothatinsolution.

  • 标签: 稀土金属离子 多孔物质离子 树脂
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  • 简介:RadioactiveIonBeamLineinLanzhou¥ZhanWenlong;GuoZhongyan;LiuGuanhua;YinQuanmin;ZhouJianqunandWangYifangAsanewfrontierinnu...

  • 标签: LANZHOU
  • 简介:Progress of IMP Laser Ion SourceProgressofIMPLaserIonSource¥ZhaoZhizheng;YangYongfengandCaiXichenLotsOfprogressesofIMPlaserio...

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  • 简介:Experimentshaveshownthattheionenergyobtainedbylaser–ionaccelerationcanbeoptimizedbychoosingeithertheappropriatepulsedurationortheappropriatetargetthickness.WedemonstratethatthisbehaviorcanbedescribedeitherbythetargetnormalsheathaccelerationmodelofSchreiberetal.orbytheradiationpressureaccelerationmodelofBulanovandcoworkers.Thestartingpointofourconsiderationsisthattheessentialpropertyofalasersystemforionaccelerationisitspulseenergyandnotitsintensity.Maybesurprisinglyweshowthathigherionenergiescanbereachedwithreducedintensities.

  • 标签: laser–ion ACCELERATION RELATIVISTIC LASER PLASMA INTERACTION
  • 简介:WatersorptionisothermsavailableintheliteraturesofNa^+-fromofDowex50W×4and×8,BioRex-70,Amberlyst-15,Nafion-117,hydroustitaniumoxide,crystallinezirconiumphosphateandzinchexacyanoferrate(Ⅱ),havebeenanalysedbytheD′ArcyandWattequation.HydrationofNa^+intheionexchangersisthepredominantinteractionofsorbedwater.Thecorrelationbetweenthehydrationnumbersandthoseobtainedforelectrolytesolutionisfoundinthispaper.Qualitativeimplicationsofthestateofsorbedwaterintheionexchangersonitsvariouscharacteristicquantitieslikeselectivity,arebrieflydiscussed.

  • 标签: 离子交换剂 钠离子 吸水状态
  • 简介:INFLUENCEOFIONBEAMBOMBARDMENTONSURFACEPROPERTIESOFPOPYURETHANEGuHanqing,LuMozhuandDingFuqing(TianjinInstituteofUrologicSurger...

  • 标签: : ION BEAM SURFACE MODIFICATION SURFACE
  • 简介:Inthispaper,amacrokineticsmodelequationdescribingthecharacteristicsofthesolid-liquidmasstransferhasbeenproposed.Thequalitativeanalysisandexperimentalverificationhavebeendoneforthismodeequation.Themodelequationcanexplaintheionexchangeprocessconsiderablywell.

  • 标签: 离子交换动力学 模型方程 固-液相转移
  • 简介:Ionchannelsareessentialforcellularsignaling.Voltage-gatedionchannels(VGICs)arethelargestandmostextensivelystudiedsuperfamilyofionchannels.Theypossessmodularstructuralfeaturessuchasvoltage-sensingdomainsthatencircleandformmechanicalconnectionswiththepore-formingdomains.Suchfeaturesareintimatelyrelatedtotheirfunctioninsensingandrespondingtochangesinthemembranepotential.Inthepresentwork,wediscussthethermodynamicmechanismsoftheVGICsuperfamily,includingthetwo-stategatingmechanism,sliding-rockingmechanismofthevoltagesensor,subunitcooperation,lipid-infiltrationmechanismofinactivation,andtherelationshipwiththeirstructuralfeatures.

  • 标签: Ion channel GATING mechanism MEMBRANE potential
  • 简介:Inthispaper,thecontinuouselectroregenerationofionexchangeresinisinvestegated.Themixedresinisinsertedbetweenacationexchangemembraneandananionexchangemembrane.Theeffluentwateroffreshwaterroommeetsthedemandforpowerplantonwatertreatment.TheB2thatisthecumulativeformationconstantofthemetalcomplexesofresinisverydifferentewithorwithoutelectricfield.Itindicatesthatthedissociationdegreeofmetalcomplexesofresinisgreaterwitelectricfieldthanthatwithoutelectricfield.

  • 标签: 离子交换树脂 阳离子交换膜 连续电镀再生 阴离子交换膜
  • 简介:Anionbeamhastheuniquefeatureofbeingabletodeposititsmainenergyinsideahumanbodytokillcancercellsorinsidematerial.However,conventionalionacceleratorstendtobehugeinsizeandcost.Inthispaper,afutureintenselaserionacceleratorisdiscussedtomakethelaser-basedionacceleratorcompactandcontrollable.Theissuesinthelaserionacceleratorincludetheenergyefficiencyfromthelasertotheions,theionbeamcollimation,theionenergyspectrumcontrol,theionbeambunching,andtheionparticleenergycontrol.Inthestudy,eachcomponentisdesignedtocontroltheionbeamqualitybyparticlesimulations.Theenergyefficiencyfromthelasertoionsisimprovedbyusingasolidtargetwithafinesub-wavelengthstructureoranear-critical-densitygasplasma.Theionbeamcollimationisperformedbyholesbehindthesolidtargetoramulti-layeredsolidtarget.Thecontroloftheionenergyspectrumandtheionparticleenergy,andtheionbeambunchingaresuccessfullyrealizedbyamulti-stagelaser–targetinteraction.

  • 标签: INTENSE SHORT-PULSE LASER LASER ION ACCELERATION
  • 简介:Weconsideronesourceofdecoherenceforaquantumcomputercomposedofmanytrappedionsduetothethermaleffectsofthesysteminthepresenceoflaser-ioninteraction.Theupperlimitofthetemperatureatwhichthelogicalgateoperationscouldbecarriedoutreliablyisgiven,andourresultisagreementwiththeexperiment.

  • 标签: 量子计算机 离子陷阱 温度效应
  • 简介:1IntroductionThenickelaloysandcomplexesarewidelyusedasmagnetic,optical,nuclearandsuperconductingmaterials[1,2].Manynickelcom...

  • 标签: Nickel CHLORIDE ELECTROCHEMICAL BEHAVIOR Transfer COEFFICIENT