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简介：Ｒｏｔａｔｉｏｎ　ｉｎ　Ｒｅａｃｔｉｏｎ　１９Ｆ＋５１ＶＲｏｔａｔｉｏｎｉｎＲｅａｃｔｉｏｎ１９Ｆ＋５１Ｖ￥ＷａｎｇＱｉ；ＬｕＪｕｎ；ＸｕＨｕｓｈａｎ；ＬｉＳｏｎｇｌｉｎ；ＺｈｕＹｏｎｇｔａｉａｎｄＺｈａｎｇＹｕｈｕＩｎｄＬｓｓｉ...

简介：在教学过程中，教师应循循诱导，激发学生学习兴趣，以培养学生主动学习，独立思考，探索研究的习惯和分析问题，解决问题能力．

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简介：Theeffectofbismuth（Bi）forbothVO2+/VO2+andV3+/V2+redoxcouplesinvanadiumflowbatteries（VFBs）hasbeeninvestigatedbydirectlyintroducingBionthesurfaceofcarbonfelt（CF）.TheresultsshowthatBihasnocatalyticeffectforVO2+/VO2+redoxcouple.Duringthefirstchargeprocess,BiisoxidizedtoBi3+（neverreturnbacktoBimetalinthesubsequentcycles）duetothelowstandardredoxpotentialof0.308V（vs.SHE）forBi3+/BiredoxcouplecomparedwithVO2+/VO2+redoxcoupleandBi3+exhibitno（orneglectable）electro-catalyticactivity.Additionally,therelationshipbetweenBiloadingandelectrochemicalactivityforV3+/V2+redoxcouplewasstudiedindetail.2wt%Bi-modifiedcarbonfelt（2%-BiCF）exhibitsthehighestelectrochemicalactivity.Usingitasnegativeelectrode,ahighenergyefficiency（EE）of79.0%canbeachievedatahighcurrentdensityof160mA/cm2,whichis5.5%higherthanthepristineone.Moreover,theelectrolyteutilizationratioisalsoincreasedbymorethan30%.Eventhecelloperatedat140mA/cm2forover300cycles,theEEcanreach80.9%withoutobviousfluctuationandattenuation,suggestingexcellentcatalyticactivityandelectrochemicalstabilityinVFBs.

简介：金属V作为贮氢材料具有良好的增压性能因而在ICF靶丸制备工艺中备受关注，但是金属V难活化，严重影响了其在增压材料方面的应用。为了改善金属V的活化性能，向金属V中掺杂少量的金属Ni以期达到对其改性和改善其贮氢性能的目的。

简介：全部的内部分区和(尖端)为~(12)在温度被计算直到6000KC~(16)O_2。用计算分区函数，我们生产ν_的线紧张~(12)的3乐队在几高温度的C~(16)O_2。结果证明计算的线紧张在在直到3000K的温度的HITRAN数据库的对那些的很好的同意，它在高温度为尖端和线紧张的计算提供强壮的支持。然后，计算被扩大推进高温度，和ν_的模仿的系列~(12)的3乐队在5000和6000K的C~(16)O_2被报导。

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简介：Vanadiumalloys,especiallythatofV4Cr4Ti,aresupposedasthepromisingcandidatestructuralmaterialforfusionapplicationsfortheirgoodthermalproperties,hightemperaturestrengthandtheinherentlowactivationcharacteristics.However,inrecent

简介：Vanadiumalloys(V-Cr-Tiseries)areimportantcandidatematerialsforblanketcomponentsoffusionreactorsduetotheirlowactivationandhighstrengthatelevatedtemperatures.Low-temperatureirradiationembrittlementdeterminestheoperationtemperaturelimitofVanadiumalloysfortheapplicationtostructuralmaterialsoffusionreactorsirradiationresponseofvanadiumalloysneedstobeclarifiedfortheirapplication.Inthepresentstudy,specimensoftwoalloys(V-4Cr-4TiandV-5Cr-5Ti)wereirradiatedwithenergeticHeionsandheavyionstounderstandhardeningofthealloysduetoheliumaccumulationandcascadedamageproduction.

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简介：Accordingtothewell-establishedlight-to-electricityconversiontheory,resonantexcitedcarriersinthequantumdotswillrelaxtothegroundstatesandcannotescapefromthequantumdotstoformphotocurrent,whichhavebeenobservedinquantumdotswithoutap–njunctionatanexternalbias.Here,weexperimentallyobservedmorethan88%oftheresonantlyexcitedphotocarriersescapingfromInAsquantumdotsembeddedinashort-circuitedp–njunctiontoformphotocurrent.Thephenomenoncannotbeexplainedbythermionicemission,tunnelingprocess,andintermediate-bandtheories.Anewmechanismissuggestedthatthephotocarriersescapedirectlyfromthequantumdotstoformphotocurrentratherthanrelaxtothegroundstateofquantumdotsinducedbyap–njunction.Thefindingisimportantforunderstandingthelow-dimensionalsemiconductorphysicsandapplicationsinsolarcellsandphotodiodedetectors.

简介：捷联惯性测量单元较“平台式”惯性测量单元在功能上有新的突破，即前者能实现三维定位，后者只能实现水平二维定位。人们常提及的捷联惯性测量单元是指多陀螺多加速度计的测量单元，即测量过程中用线性加速度计测量运动体的线性加速度，用陀螺仪测量运动体转动角度、角速度或角加速度的测量装置。该类惯性测量单元造价昂贵，针对此，人们在利用多个线性加速度计的适当组合还可以测量运动体的转动角速度甚至转动角加速度等角度信息原理的基础上，提出了无陀螺多加速度计捷联惯性测量单元和单陀螺多加速度计捷联惯性测量单元的实现方案。

简介：Theground-stateandthermodynamicpropertiesofquantummixed-spinchainsof1/2-1/2-1-1and3/2-3/2-1-1areinvestigatedbyaquantumMonteCarlosimulationwiththeloop-clusteralgorithm.For1/2-1/2-1-1chain,wefindithastwophasesseparatedbyanenergy-gapvanishingpointintheground-state.For3/2-3/2-1-1chain,thenumericalresultsshowtwoenergy-gapvanishingpointsisolatedbydifferentphasesinitsground-state.Ourcalculationsindicatethatallthesegroundstatephasescanbeunderstoodbymeansofvalence-bond-solidpicture,andthethermodynamicbehavioratfinitetemperaturesiscontinuousasafunctionofparameterα=J2/J1.

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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.

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