简介：ThedevelopmentoftheHalfWaveResonator(HWR010)isbasedontheChinaADSproject.TheHWR010operatesat162.5MHzandcanprovidemorethan0.78MVofacceleratingvoltagepercavityforprotonwithopt=0.10.ThegoaloftheRFpropertiesistogetalowerheatloadandahigheracceleratinggradient,whicharedeterminedbyahigherR/Q0andlowerpeaksurfacefields(Bpk/EaccandEpk/Eacc).InordertooptimizetheHWRgeometryparameters,CST-MWSisusedtoconducttheRFsimulation.TheoptimizedRFparametersareshowinTable1.

简介：本文构造了一系列方程,由这些方程可以得到一年中任何一天、一天中任何一个时刻、从地球上任何纬度观察的太阳在天空中的位置。由这些方程出发,给出了太阳每年一次的8字形图的解释。这些方程还可以预测日出与日落时间。结合对8字形图的理解,本文证明了日出开始变早的时间为什么不是恰好在冬至时刻,而是在冬至以后的一段时间。在方程的构造中,模型假定地球环绕太阳运行的轨道是一个圆,且沿轨道匀速运动,利用日出的预测时间来评估由这个假设所引起的误差。

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.

简介：Theoreticalmodelsofstellarevolutionpredictnegligiblequantitiesof6Li,9Be,and11Binthehydrogenburningphasesofastar’sevolution[1].TheprimordialBig-Bangnucleosynthesis(BBN)modelmightbemoregenerousinitsproductionoftheseelements[2].Theradiative-capturecrosssectionforprotoncaptureon11Bleadingto12CissmallatastrophysicallyinterestingenergiesbecauseofthelargeCoulombbarrier.

简介：Theresultsonadissociationbehaviorofpropanehydratespreparedfrom'drywater'andcontainedunreactedresidualwaterintheformoficeinclusionsorsupercooledliquidwater(watersolutionofgas)werepresentedfortemperaturesbelow273K.Thetemperaturerampingorpressurereleasemethodwasusedforthedissociationofpropanehydratesamples.Itwasfoundthatthemechanismofgashydratedissociationattemperaturesbelow273Kdependedonthephasestateofunreactedwaterinthehydratesample.Gashydratesdissociatedintoiceandgasiftheiceinclusionswereinthehydratesample.Thesamplesofpropanehydrateswithinclusionsofunreactedsupercooledwateronly(withouticeinclusions)dissociatedintosupercooledwaterandgasbelowthepressureofthesupercooledwater-hydrate-gasmetastableequilibrium.

简介：