简介:Thisresearchreportsthepreparationandcharacterizationofcoppernanoparticlesmodifiedbydidecylbenzenesulfonate(DBS),TheCunanoparticles'sizewasdeterminedtobe40nmbytransmissionelectronmicroscope(TEM).TheX-rayphotoelectronspectrometry(XPS)resultsshowthatthereareinteractionsbetweenthecoppernanoparticlesandDBSfunctiongroup.Thenonlinearopticalpropertieswerestudiedbythefour-wavemixingmethod.Thevalueofx^(3)/α0wasfoundtobe6.9×10^-11esucm.
简介:Energydepositionofintensepulsedionbeam(IPIB)ontheTitargetbasedonthe2DmodelofIPIBdensityhasbeensimulatedbytheMonteCarlo(MC)method.Takingthedepositedenergyasthethermalsource,wehaveestablishedtheablationmodelofthetargetandcalculatedthespatialandtemporalevolutionoftheablationshapeoftheTitargetirradiatedbyIPIBwithdifferentenergydensities.WehavealsoestablishedtheejectionmodelofthehydrodynamicequationsrelatedtotheablationshapeofthetargetbyusingtheablationresultsastheinitialconditionsofplasmaformedbyIPIBirradiation.Thespatiallyandtemporallyevolutedprofilesoftheplasmapressureandmassdensityarecalculated.
简介:Thepedestalcharacteristicisanimportantbasisforhighconfinementmode(Hmode)research.BecauseofthefinitespatialresolutionofThomsonscattering(TS)diagnosticonExperimentalAdvancedSuperconductingTokamak(EAST),itisnecessarytocharacterizethepedestalwithasuitablefunctionalform.BasedonsimulatedandexperimentaldataofEAST,itisshownthatthetwo-linemethodwithabilinearfittinghasbetterreproducibilityofpedestalparametersthanhyperbolictangent(tanh)andmodifiedhyperbolictangent(mtanh)methods.ThismethodhasbeenappliedtoEASTtypeIedgelocalizedmode(ELM)discharges,andtheelectronpedestaldensityisfoundtobeproportionaltotheline-averageddensityandtheedgepressuregradientisfoundtobeproportionaltothepedestalpressure.Furthermore,theionpoloidalgyro-radiushasbeenidentifiedasthesuitableparametertodescribethepedestalpressurewidth.
简介:Thekillinglogarithmsindexinkillingavegetativeforminanexplosureofabout90sandasporeinanexplosureofabout120s,byusingalow-temperatureplasmaproducedbydielectricbarrierdischarge(DBD),reached5.Thespeedinkillingthestrainstested,byusingalow-temperatureplasma,wasthehighestwithE.Coli,thenS.AureusandB.Subtilisvarnigerspore.Theresultsofthescanningelectronmicroscopeshowedthatthelow-temperatureplasmadestroyedtheouterstructureofthebacteriaandthatthevegetativeformwasmoresusceptibletotheinactivationeffectofthelow-temperatureplasmathanwasthespore.Thisindicatedthattheeffectsofthehighvoltageandhighvelocityparticleflow,inplasma,penetratingthroughtheouterstructureofthebacteriamightplayadominantroleduringtheinactivationofthebacteria.
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简介:本文对先进三代核电AP1000的丧失正常给水事故从稳压器满溢、冷却剂系统压力边界完整性和燃料包壳完整性方面进行分析研究。由于AP1000设计中考虑汽机停机可能会引起电网扰动,因此考虑了反应堆紧急停堆之后汽机停机引起的丧失厂外交流电的情况。丧失厂外交流电后,主泵将停运,一次侧排热能力将降低,冷却剂升温升压;但丧失厂外交流电也将引起化容系统不可用,从而可能降低稳压器满水和冷却剂系统超压的风险。因此,本文对于不同的限制准则,分别进行交流电是否有效的分析评价。结果表明,无论交流电是否有效,在非能动堆芯冷却系统的运行下和操纵员动作下,堆芯余热可以有效导出,稳压器没有满溢,冷却剂系统的压力边界以及燃料包壳的完整性均能得到保证。