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13 个结果
  • 简介:MainWorkforRadiationProtectionGroupin1996¥SongWenjie;WangGuiling;LiZongqiang;ZhuHongbin;FuMingdeng;GaoXiuying;MaHuifangandZhe...

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  • 简介:Systemsofphotosyntheticreactioncentreshavebeenmodelledasheatengines,whileithasalsobeenreportedthattheefficiencyandpowerofsuchheatenginescanbeenhancedbyquantuminterference—atraitthathasattractedmuchinterest.Wecomparetwodefinitionsoftheworkofsuchaphotosyntheticheatengine,i.e.definitionAusedbyWeimeretal.andBbyDorfmanetal.Wealsointroduceacoherentinteractionbetweendonorandacceptor(CIDA)todemonstrateareversibleenergytransport.Weshowthatthesetwodefinitionsofworkcanimpartcontradictoryresults,thatis,CIDAenhancesthepowerandefficiencyofthephotosyntheticheatenginewithdefinitionBbutnotwithA.Additionally,wefindthatbothreversibleandirreversibleexcitation-energytransportcanbedescribedwithdefinitionA,butdefinitionBcanonlymodelirreversibletransport.Asaresult,weconcludethatdefinitionAismoresuitableforphotosyntheticsystemsthandefinitionB.

  • 标签: QUANTUM WORK HEAT ENGINE PHOTOSYNTHESIS
  • 简介:Withabout20permanentstaffandseveralgraduatestudents,IonSourceGroupisdoingpioneeringworkinhighperformanceECRandLaserionsourcedevelopment,ionsourceplasmastudy,ionsourceapplicationandroutineoperationfornationallaboratory.In2016,withthegreatcontributionsoftheteammembers,manyverypromisingresultsandachievementshavebeenmade.FortheroutineoperationofHIRFLfacility,threeionsources,i.e.

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  • 简介:Anappropriatecoupledcohesivelawforpredictingthemixedmodefailureisestablishedbycombiningnormalseparationandtangentialseparationofsurfacesinthecohesivezonemodel(CZM)andthecohesiveelementmethod.TheXu-Needlemanexponentialcohesivelawwiththefullyshearfailuremechanismisoneofthemostpopularmodels.Basedontheproposedconsistentlycoupledrule/principle,theXu-Needlemanlawwiththefullyshearfailuremechanismisprovedtobeanon-consistentlycoupledcohesivelawbyanalyzingthesurfaceseparationwork.ItisshownthattheXu-Needlemanlawisonlyvalidinthemixedmodefracturewhenthenormalseparationworkequalsthetangentialseparationwork.BasedontheconsistentlycoupledprincipleandthemodificationoftheXu-Needlemanlaw,aconsistentlycoupledcohesive(CCC)lawisgiven.ItisshownthattheproposedCCClawhasalreadyovercomethenon-consistencydefectoftheXu-Needlemanlawwithgreatpromiseinmixedmodeanalyses.

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  • 简介:Themainworkoftheirradiationtechniquegroupfocusesonthefollowingtwoaspectsin2016:1.TechniquesupportWehavehadabout772.5hbeamtimefor39roundsofsingleeventeffect(SEE)tests,whichiscooperatingwithvariousinstitutes,universities,andcompanies.Thetestsarethebasicsafeguardforthespacecraftandsatellite.InordertoguaranteethetestefficiencyoftheTerminal5,themaintenanceandimprovementforthevacuum,thesampletransferandbeammonitorsystemhavebeenachieved.

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  • 简介:Theconceptofentransyhasbeennewlyproposedintermsoftheanalogybetweenheatandelectricalconductionandcouldbeusefulinanalyzingandoptimizingtheheat-workconversionsystems.Thisworkpresentscomparativeanalysesofentransyandexergyforoptimizationsofheat-workconversion.TheworkproductionandheattransferprocessesinCarnotcyclesystemareinvestigatedwiththeformulationsofexergydestruction,entransyloss,workentransy,entransydissipation,andefficienciesforbothcasesofdumpingandnon-dumpingofusedsourcefluid.Theeffectsofsourceandcondensationtemperaturesonthesystemperformancearesystematicallyinvestigatedforoptimalconditionofproducingmaximumworkorworkentransy.

  • 标签: 火用分析 热功转换 优化 卡诺循环 转换系统 传热过程
  • 简介:拉制金属表被合拢与11%变硬工作。这些随后被使用,抵抗焊接构造X类型格子捆绑有0.17的核心亲戚密度的三明治面板。三明治面板在单轴的压缩被测试,为比较,有限元素的方法被采用模仿测量压缩压力紧张曲线。山峰压缩力量比金字塔形的核心三明治的高是32%。变硬工作的X类型格子结构的提高的机械性质主要与弯曲并且工作变硬的低度从直神气的贡献发源,而非二维的蹒跚的节点。

  • 标签: 加工硬化 桁架结构 压缩性能 X型 模拟 实验
  • 简介:TernarymetalchalcogenidesemiconductorAg8SnS6,whichisanefficientphotocatalystundervisiblelightradiation,isstudiedbyplane-wavepseudopotentialdensityfunctionaltheory.Aftergeometryoptimization,theelectronicandopticalpropertiesarestudied.Ascissoroperatorvalueof0.81eVisintroducedtoovercometheunderestimationofthecalculationbandgaps.Thecontributionofdifferentbandsisanalyzedbyvirtueoftotalandpartialdensityofstates.Furthermore,inordertounderstandtheopticalpropertiesofAg8SnS6,thedielectricfunction,absorptioncoefficient,andrefractiveindexarealsoperformedintheenergyrangefrom0to11eV.TheabsorptionspectrumindicatesthatAg8SnS6hasagoodabsorbencyinvisiblelightarea.Surfaceenergiesandworkfunctionsof(411),(413),(211),and(112)orientationshavebeencalculated.TheseresultsrevealthereasonforanoutstandingphotocatalyticactivityofAg8SnS6.

  • 标签: 第一原理方法 功函数 表面能 光学性质 电子 密度泛函理论