简介：在这篇文章，我们在场有浸透的发生的一个肝炎B流行模型。确定、随机的系统的动态行为被学习。到这个目的，我们首先建立确定的模型的平衡的本地、全球的稳定性条件。由构造合适的随机的Lyapunov功能，第二，为肝炎B的各态历经的静止分发以及扑灭的存在的足够的条件被获得。

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简介：BymeansoflimittheoryandFonda'stheorem,anSEISepidemicmodelwithconstantrecruitmentandthedisease-relatedrateisconsidered.Theincidencetermisofthenonlinearform,andthebasicreproductionnumberisfound.Ifthebasicreproductionnumberislessthanone,thereexistsonlythedisease-freeequilibrium,whichisgloballyasymptoticallystable,andthediseasediesouteventually.Ifthebasicreproductionnumberisgreaterthanone,besidestheunstabledisease-freeequilibrium,thereexistsalsoauniqueendemicequilibrium,whichislocallyasymptoticallystable,andthediseaseisuniformlypersistent.

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简介：Inindirectdrive,reducingpeakintensityofasinglebeamandcontrollingoverlapofmulti-beamsaretwooppositerequirementsforlaserfocalspotdesign.Inthispaper,animprovedlaserspotdesigntechniqueforindirectdrivebuiltuponthegeometricstructuresoflaserpropagationintohohlraumhasbeenintroduced.Theproposedtechniqueisabletogenerateappropriatecontinuousphaseplate(CPP)producingaspecialshapedspotthatcanbalancetheoppositerequirements.ThecorrespondingCPPdoesnotbringdifficultiestothedesignandfabrication.Phaseaberrationsaremoresensitivetothespecialshapedspot;however,itcanbetolerableforthecurrentbeamcontrollevel.

简介：Inthispaper,normalincidenceverticalp-i-nphotodetectorsonagermanium-on-insulator(GOI)platformweredemonstrated.Theverticalp-i-nstructurewasrealizedbyion-implantingboronandarsenicatthebottomandtopoftheGelayer,respectively,duringtheGOIfabrication.Abruptdopingprofileswereverifiedinthetransferredhigh-qualityGelayer.Thephotodetectorsexhibitadarkcurrentdensityof~47mA∕cm~2at-1Vandanopticalresponsivityof0.39A/Wat1550nm,whichareimprovedcomparedwithstate-of-the-artdemonstratedGOIphotodetectors.Aninternalquantumefficiencyof~97%indicatesexcellentcarriercollectionefficiencyofthedevice.Thephotodetectorswithmesadiameterof60μmexhibita3dBbandwidthof~1GHz,whichagreeswellwiththeoreticalcalculations.Thebandwidthisexpectedtoimproveto~32GHzwithmesadiameterof10μm.ThisworkcouldbesimilarlyextendedtoGOIplatformswithotherintermediatelayersandpotentiallyenrichthefunctionaldiversityofGOIfornear-infraredsensingandcommunicationintegratedwithGeCMOSandmid-infraredphotonics.