简介：ThispaperstudiestheequilibriumgeometriesandelectronicpropertiesofBenandBenLiclusters,upton=15,byusingdensity-functionaltheory(DFT)atB3LYP/6-31G(d)level.Thelowest-energystructuresofBenandBenLiclustersweredetermined.Theresultsindicatethatasinglelithiumimpurityenhancesthestabilityandchemicalreactivityoftheberylliumclusters.Itfindsthatthegeometriesofthehostclusterschangesignificantlyaftertheadditionofthelithiumatomforn≥8.Thelithiumimpuritypreferstobeontheperipheryofberylliumclusters,andoccupiesvertexsites.BothBe4Li,Be9Li,andBe13Liwerefoundtobeparticularlystablewithhigheraveragebindingenergy,localpeaksofsecond-orderenergydifferenceandfragmentationenergies.ForalltheBenLiclustersstudied,wefoundchargetransfersfromtheLitoBesiteandco-existenceofcovalentandmetallicbondingcharacteristics.更多还原

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简介：Thestructureandbindingenergyofcopperclustersofthesizerange70to150werestudiedbyusingtheembeddedatommethod.Thestabilityofthestructureoftheclusterswasstudiedbycalculatingtheaveragebindingenergyperatom,firstdifferenceenergyandseconddifferenceenergyofcoppercluster.Mostofthecopperclustersofthesizen=70-150adoptanicosahedralstructure.Theresultsshowthatthetrendsareinagreementwiththeoreticpredictionforcopperclusters.Themoststablestructuresforcopperclustersarefoundatn=77,90,95,131,139.

简介：Inthispaper,weinvestigateperfectquantumteleportationanddensecodingbyusingan2N-qubitWstatechannel.Inthequantumteleportationscheme,anunknownN-qubitentangledstatecanbeperfectlyteleported.Oneebitofentanglementandtwobitsofclassicalcommunicationareconsumedintheteleportationprocess,justlikewhenusingtheBellstatechannel.WhileN+1bitsofclassicalinformationcanbetransmittedbyonlysendingNparticlesinthedensecodingprotocol.

简介：ＦｉｒｓｔＯｂｓｅｒｖａｔｉｏｎｏｆＹｒａｓｔＢａｎｄｉｎＮ＝９１Ｏｄｄ－ｏｄｄ１６２ＬｕＮｕｃｌｅｕｓ￥ＺｈａｎｇＹｕｈｕ；ＺｈｏｕＸｉａｏｈｏｎｇ；ＺｈａｏＱｉｎｇｚｈｏｎｇ；ＳｕｎＸｉａｎｇｆｕ；ＬｅｉＸｉａｎｇｇｕｏ；?..

简介：把一个统计腐烂模型基于结合的一个动态Langevin方程，我们计算僵绳以后的巨大的偶极子回声(GDR)的变化有僵绳以后的磨擦力量的重原子核240Cf，246Cf，252Cf，和240U的光线复合()。我们发现僵绳以后的排放到的敏感与增加系统的neutron-to-proton比率(N/Z)更加减少。而且为240U，排放对不再敏感。我们建议那精确地由测量切断前GDR光线复合获得僵绳以后的磨擦强度的信息，与低N/Z在各种各样的复合系统之中选择那些是最佳的。

简介：为在一种尺寸与开的边界条件跳跃相关的N部件Bariev模型在并列Betheansatz方法的框架被学习。Theenergy光谱，integrable边界条件和相应Betheansatz方程被导出。

简介：将强爆炸环境中的冲击波与目标表面热层作用简化为一维/二维平面冲击波与水平热层作用,分别采用一维不定常流理论和二维有限体积数值方法进行求解,获取冲击波与热层作用的流场发展图像。结果表明：一维情况下,热层内产生了往返传播的波系,致使流场压力、密度等物理量以阶梯型变化趋近终值;二维情况下,流场中出现了独特的前驱波和涡旋结构,壁面附近压力随时间变化呈现双峰构型,与无热层存在的情况相比,冲击波到时提前,动压水平分量峰值增大1~2.5倍。

简介：ThepresolarSiCgrains[1]carrytheoriginalstellarnucleosynthesissignature.Theirisotopicanomaliescomparedtothesunarethestrongconstrainsinthesupernovae(SN)modelcalculations.The15N-excessinsomeSiC-ABgrains(12C/13C<10and14N/15N<272)isoneofthechallengesofcore-collapsesupernovae(CCSNe)models[2].Recently,PignataripointedoutthattheentrainmentofH-richmaterialintotheHeshellbeforetheSNexplosionallowsthecoproductionof13C,15Nand26Al,whichprovidesanewproductionscenarioforSiC-ABgrains[2].IntheHeshellnucleosynthesis,the13Cisproducedthrough12C(p,γ)13N(β+γ)13Creaction.The14Nissynthesizedthrough13N(n,γ)and13C(p,γ)reactions.

简介：LargeapertureNd:phosphatelaserglassisakeyopticalelementforaninertialconfinementfusion(ICF)facility.N31,onetypeofneodymiumdopedphosphateglasses,wasdevelopedforhighpeakpowerlaserfacilityapplicationsinChina.ThecompositionandmainpropertiesofN31glassaregiven,togetherwiththoseofLHG-8,LG-770,andKGSS-0180Nd:phosphatelaserglasses,fromHoyaandSchott,andfromRussia.Thetechnologiesofpotmelting,continuousmelting,andedgecladdingoflargesizeN31phosphatelaserglassarebrieflydescribed.ThesmallsignalgainprofilesofN31glassslabsfrombothpotmeltingandcontinuousmeltingatvariousvaluesofthepumpingenergyofthexenonlamparepresented.N31glassischaracterizedbyastimulatedemissioncrosssectionof3.8×10-20cm2at1053nm,anabsorptioncoefficientof0.10–0.15%cm-1atlaserwavelength,smallresidualstressaroundtheinterfacebetweenthecladdingglassandthelaserglass,opticalhomogeneityof～2×10-6ina400mmaperture,andlaserdamagethresholdlargerthan42J/cm2fora3nspulsewidthat1064nmwavelength.

简介：Non-noblemetal-basedcatalysts,especiallystableones,havegainedincreasingattentionsinthefieldofelectronicallycatalytichydrogenevolutionreaction(HER).Inthiswork,anN-dopedcarbonconfinedCo–Nialloywithreducedgrapheneoxide(rGO)decoration(CoNi@N-C/rGO)wasfabricatedforHER.ThepreparedcatalystexhibitedexcellentHERactivityinanacidicelectrolyte(Tafelslopeof~133.7mV).TheresultsshowedthattheenhancedHERperformanceofthenanostructuresisattributedtothechemicalandelectronicsynergiceffectbetweentheconfinedCo–NialloyandrGO.Stabilitytests,realizedvialongtermpotentialcyclesandextendedelectrolysis,providedtheconfirmationoftheexceptionaldurabilityofthecatalyst,whichoriginatedfromtheconfiningeffectoftheN-dopedcarbonshell.Thisversatilemethodprovidesastrategyfordesigningstablenon-preciousmetalelectrocatalystsconfinedbycarboncoating.

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简介：Accordingtothegoodchargetransportingpropertyofperovskite,wedesignandsimulateap–i–n-typeall-perovskitesolarcellbyusingone-dimensionaldevicesimulator.Theperovskitechargetransportinglayersandtheperovskiteabsorberconstitutetheall-perovskitecell.Bymodulatingthecellparameters,suchaslayerthicknessvalues,dopingconcentrationsandenergybandsofn-,i-,andp-typeperovskitelayers,theall-perovskitesolarcellobtainsahighpowerconversionefficiencyof25.84%.Thebandmatchedcellshowsappreciablyimprovedperformancewithwidenabsorptionspectrumandloweredrecombinationrate,soweobtainahighJ_(sc)of32.47mA/cm~2.Thesmallseriesresistanceoftheall-perovskitesolarcellalsobenefitsthehighJ_(sc).Thesimulationprovidesanovelthoughtofdesigningperovskitesolarcellswithsimpleproducingprocess,lowproductioncostandhighefficientstructuretosolvetheenergyproblem.

简介：首先对矩阵和其伴随矩阵的一些性质进行介绍，为后面的命题证明做一些准备；其次在文[1]的基础上给出一些更加具体的推论，并对这些推论进行证明；最后对A与A^＊的特征向量之间的关系给出了一个结果。

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简介：制备了金属-铁电层-绝缘层-半导体（Pt/Bi3.15Nd0.85Ti3O12/YSZ/Si,MFIS）二极管,研究了该二极管的存储窗口电压、疲劳特性和高温保持特性。结果表明：该二极管的存储窗口电压随扫描电压的增大呈先增大后减小的趋势,其中最大存储窗口电压约为0.88V且存储窗口电压的变化几乎不受扫描电压的扫描速度与频率的影响;该二极管在109次翻转循环后,其积累电容和耗尽电容基本没有变化,且存储窗口电压仅下降了5%。另外,该二极管在80℃下加速测量8h（相当于常温下测量60d）后,加速后器件的电容差比加速前降低了13%,说明该二极管抗疲劳特性和高温特性良好。

简介：利用TCAD仿真技术,研究了电离总剂量辐射陷阱电荷对0.18μmN沟道MOSFET转移特性的影响.构建了0.18μmN沟道MOSFET的三维仿真结构,获得了在电离总剂量（totalionizingdose,TID）效应影响下,负栅压偏置时器件中电流密度的分布情况.分析了器件浅槽隔离层（shallowtrenchisolation,STI）中氧化物陷阱电荷和界面态陷阱电荷对器件泄漏电流的影响.仿真计算了N-MOSFET的转移特性,仿真结果与辐照试验结果受辐照影响的趋势基本一致,为深亚微米MOS器件的总剂量辐射效应的损伤机制提供了一种分析手段.

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简介：激光触发气体间隙放电主要有3个发展阶段：气体分子吸收激光而被激发和电离；其次，自由电子和其它带电粒子在电场作用下发生漂移运动，它们与中性粒子间引起碰撞，并产生电离、俘获和复合等化学反应过程；漂移运动的电子和其它带电粒子受到电场的欧姆加热，再经过碰撞作用，气体温度升高，逐渐发生热电离。一般，气体温度接近约10^4K，它的导电率迅速增加，导致开关闭合。