简介:TheECRwaveheatingisnowaroutinemethodforplasmaheatingandprofilecontrolinfusiondevicesandalsoinplasmaapplications.TheoreticalstudyofECRwavepropagationandabsorptionbeganveryearlyin1950's.Basictheoreticalworkhadaccomplishedin1970~1980.Fortoroidaldeviceslikethetokamak,thefundamentalO-modeandX-modewithnearlyperpendicularpropagationwereusedveryoften.ForpureO-modeandX-modewithkx=O,
简介:Ionopticsisacriticalcomponentofionthrusters.Atwo-dimensionalaxisymmetricmodelisdevelopedtostudythecharacteristicsofthree-gridelectroncyclotronresonanceionthrusteroptics.Thecodeisbasedonaparticle-in-cellcombinedwiththeMonteCarlocollisionmethodtosimulateiondynamicsandcharge-exchangeprocessesinthegridregion.Thesimulationresultsshowthatthemodecangiveareasonableestimateofthephysicscharacteristicsoftheionoptics.Thedesignoftheionopticssatisfiestherequirementofpreventingelectronbackstreaming.Charge-exchangeionscancausedamagetothegrids,especiallytotheacceleratorgrid.'Barrel'erosioncanincreasetheacceleratorgridapertureradiusatarateof1.91×10~(-11)m/s,whilethedeceleratorgridplaysanimportantroleinreducing'pits-and-grooves'erosion.
简介:Aim:TostudytheeffectofEcdysterone(ECR)ontheexpressionofTaufromthecerebralcorticeandhippocampusandbehaviorsinpassiveavoidancereactionandspatialdiscriminationofthemiceinducedbyoverloadaluminumsalt.MethodsFourty-fiveNIHmicewererandomlydividedintofivegroups,thecontrolgroup,themodelgroup,thetreated
简介:Inordertostudytheatomicoxygencorrosionofspacecraftmaterialsinlowearthorbitenvironment,anatomicoxygensimulatorwasestablished.Inthesimulator,a2.45GHzmicrowavesourcewithmaximumpowerof600WwaslaunchedintothecircularcavitytogenerateECR(electroncyclotronresonance)plasma.TheoxygenionbeammovedontoanegativelybiasedMoplateundertheconditionofsymmetrymagneticmirrorfieldconfine,thenwasneutralizedandreflectedtoformoxygenatombeam.Thepropertiesofplasmadensity,electrontemperature,plasmaspacepotentialandionincidentenergywerecharacterized.TheatomicoxygenbeamfluxwascalibratedbymeasuringthemasslossrateofKaptonduringtheatomic5~30eVandacrosssectionofφ80mmcouldbeobtainedundertheoperatingpressureof10-1~10-3Pa.Suchahighfluxsourcecanprovideacceleratedsimulationtestsofmaterialsandcoatingsforspaceapplications.
简介:Inthispaper,polycrystallinesiliconfilmsweredepositedbyelectroncyclotronresonanceplasma-enhancedchemicalvapordeposition(ECR-PECVD)usingSiH_4/ArandSiH_4/H_2gaseousmixture.EffectsofargonflowrateonthedepositionefficiencyandthefilmpropertywereinvestigatedbycomparingwithH_2.TheresultsindicatedthatthedepositionrateofusingArasdischargegaswas1.5-2timeshigherthanthatofusingH_2,whilethepreferredorientationsandthegrainsizesofthefilmswereanalogous.FilmcrystallinityincreasedwiththeincreaseofArflowrate.OptimizedflowratioofSiH_4toArwasobtainedasF(SiH_4):F(Ar)=10:70forthehighestdepositionrate.
简介:Objective:ToexplorethemechanismofEcdysterone(ECR)inpreventionoflearningandmemorydysfunctionoftheratsinducedbyβ-amyloidpeptide(Aβ25-35).Methods:NinetyWistarmaleratswererandomlydividedintofivegroups,thecontrolgroup,themodelgroup,thetreatedgroups(ECR4mg·kg^-1andECR8mg·kg-1andNimodipine
简介:蜕皮激素受体(EcR)和ultraspiracle(USP)形成heterodimers调停ecdysteroid在molting和变形期间发信号。各种各样的EcR/USPheterodimers被报导了。然而,联合什么样的EcR/USP被鳞翅类的昆虫在幼虫蛹的变形期间采用并且EcR/USPheterodimer是否在不同纸巾之中变化,是不清楚的。探讨这些问题,每EcR和USP的二isoforms从普通糖蛾被克隆,他们的送信人RNA表示模式被即时量的聚合酶链反应响应神经质的正式就职在幼虫蛹的变形期间并且在midgut在不同纸巾检验。而且,他们的subcellular本地化和蛋白质蛋白质相互作用被短暂表示并且分别地的远西方的弄污探索。所有四基因在prepuae或蛹是显著地起来调整的。EcRB1和USP1的表示侧面与在外皮,胖身体和midgut的对方将近相同,并且一种类似的状况也适用于EcRA和USP2。三基因除了USP2,和USP1回答了正式就职到20-hydroxyecdysone(20E)能由20E和少年荷尔蒙起来调整。在原子核和原子本地化主要局部性的四蛋白质被20E支持。在每EcR和USP之间的蛋白质蛋白质相互作用在vitro被发现。这些结果建议EcR/USPheterodimer(EcRA/USP2和EcRB1/USP1)的二种类型可以在普通糖蛾同时存在,并且后者应该在幼虫蛹的变形期间起更重要的作用。另外,EcR/USPheterodimer的类型不在在变形期间经历histolysis和新生的纸巾变化。
简介:【本刊讯】2013年6月6~7日,由中国物品编码中心、中国ECR委员会主办的“2013第十一届中国ECR大会”在杭州盛大召开,国内外知名零售企业、制造企业、物流企业代表以及行业协会、专家学者等400余人汇聚一堂,齐力打造协同供应链,共同探讨零售业突围解困之路。本届大会以“打造协同供应链,提升消费者价值”为主题,围绕我国消费品市场发展趋势分析、消费者研究与需求分析以及如何打造协同供应链等话题展开。中国物品编码中心主任、中国ECR委员会联合主席张成海、浙江省质量技术监督局党委书记杨烨、中国连锁经营协会会长郭戈平等出席本次会议。