简介：Thesymmetryenergy,whichgovernsmanyphysicalphenomenafromthestructureofexoticnucleitoastrophysicalprocesses,hasmanyramificationsinbothnuclearphysicsandastrophysics.Althoughnuclearsymmetryenergyanditsslopeatthenormaldensityofnuclearmatterhavebeenroughlypinneddown,recentinterpretationsofFOPIandFOPI-LANDdatabydifferenttransportmodelsleadtodivergentconclusionsonthedensity-dependentsymmetryenergyatsupradensities.

简介：Cerenkovwakeamplificationcanbeusedasanacceleratingscheme,inwhichatriggerbunchofelectronspropagatinginsideacylindricalwaveguidefilledwithanactivemediumgeneratesaninitialwakefield.Duetothemultiplereflectionsinsidethewaveguide,thewakemaybeamplifiedsignificantlymorestronglythanwhenpropagatinginaboundlessmedium.Sufficientlyfarawayfromthetriggerbunchthewake,whichtravelswiththesamephasevelocityasthebunch,reachessaturationanditcanaccelerateasecondbunchofelectronstrailingbehind.ForaCO2gasmixtureournumericalandanalyticalcalculationsindicatethatashortsaturationlengthandahighgradientcanbeachievedwithalargewaveguideradiusfilledwithahighdensityofexcitedatomsandatriggerbunchthattravelsatavelocityslightlyabovetheCerenkovvelocity.Toobtainastablelevelofsaturatedwakethatwillbesuitableforparticleacceleration,itiscrucialtosatisfythesingle-moderesonancecondition,whichrequireshighaccuracyinthewaveguideradiusandtheratiobetweentheelectronphasevelocityandtheCerenkovvelocity.Forsingle-modepropagationourmodelindicatesthatitisfeasibletoobtaingradientsashighasGVm-1inawaveguidelengthofcm.

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简介：Thesymmetryenergywhichcharacterizestheisospindependenceoftheequationofstateofasymmetricnuclearmatter,playsacrucialroleinunderstandingavarietyofissuesinnuclearphysicsandastrophysics,suchasheavyioncollisions,exoticnuclei,stabilityofsuperheavynuclei,fusioncrosssections,thestructures,compositionandcoolingofneutronstars[1??5].Muchtheoreticalandexperimentalefforthasbeenmadetoconstrainthedensitydependenceofsymmetryenergy.Uptonow,wehavegotsomebasicknowledgeaboutthesymmetryenergyatlowdensities,whileathighdensitiesweevendonotknowitsvariationtendencyasafunctionofdensity.Theproblemremainsunsolvedduetothedifficultyofnucleon-nucleoninteractionsandmany-bodyproblems.

简介：Weinvestigatetheeffectsofspontaneouslygeneratedcoherence(SGC)onboththesteadyandtransientgainpropertiesinafour-levelinverted-Y-typeatomicsysteminthepresenceofaweakprobe,twostrongcoherentfields,andanincoherentpump.Forthesteadyprocess,wefindthattheinversionlessgainmainlyoriginsfromSGC.Inparticular,wecanmodulatetheinversionlessgainbychangingtherelativephasebetweenthetwofields.Moreover,theamplitudeofthegainpeakcanbeenhancedandtheadditionalgainpeakcanappearbychangingthedetuningofthecouplingfield.Asforthetransientprocess,thetransientgainpropertiescanalsobedramaticallyaffectedbytheSGC.ComparedtothecasewithoutSGC,thetransientgaincanbegreatlyenhancedwithcompletelyeliminatedtransientabsorptionbychoosingtheproperrelativephasebetweenthetwofields.Andtheinverted-Y-typesystemwithSGCcanbesimulatedinbothatomicandsemiconductorquantumwellsystemsavoidingtheconditionsofSGC.

简介：在这份报纸，我们证实完全的集中结果和完全的时刻集中为加权的和结果广泛地在温和条件下面的orthant依赖者随机变量。作为推论，加权的和的相应结果否定地延长了orthant依赖者随机变量也被获得，它在文学概括并且改善相关已知的工作。

简介：Twocoupled-modemethods,namelyDGMCM(Direct-Global-MatrixCoupledModeMethod)andCCMM(ConsistentCoupled-ModeMethod),areanalyzedandcompared.First,bothofthesetwomethodsprovidetwo-waysolutions,andhencetheyareaccuratemodels.Second、theseriesoflocalverticalmodesinDGMCMconvergesasfastasthatinCCMM,whereasDGMCMhasamoretolerablerequirementofthenumberofsegmentsthanCCMM.Third,thesetwomodelsobtainthefieldsolutionbysolvingthecoupled-modesystemwithdifferentcoefficientmatrices,inwhichthecomputationaletfortfortherequiredparametersisalmostthesame.Finally,DGMCMcanhandlesomeproblemswhicharedifficultforCCMM,suchasinawaveguidewitharoughbottom,alinesourcelocatedrightontopofaslopingbottom,orinthepresenceofmultiplesources.InDGMCM,closed-formexpressionsforcouplingmatricesinatwo-layerwaveguidearegiven.Inaddition.theformulationfortheline-sourceprobleminplanegeometryisderivedtoupdateCCMM.

简介：让{X，Xk：k1}是扩大否定地依赖的随机的一个序列有普通分发F令人满意的前的变量>0。让是nonnegative珍视整数的随机的变量，独立于{X，Xk：k1}。在这份报纸，作者为随机的和$S_\tau=\sum\limits_获得必要、足够的条件{n=1}^\tau{X_n}$当随机的数字比被加数有一条更重的尾巴时，有一条一致地变化的尾巴，即，$\frac{{P(X>x)}}{{P(\tau>x)}}\to0$作为x。

简介：Weinvestigatespontaneousemissionpropertiesandcontrolofthezerophononline(ZPL)fromadiamondnitrogen–vacancy(NV)centercoherentlydrivenbyasingleellipticallypolarizedcontrolfield.WeusetheSchr¨odingerequationtocalculatetheprobabilityamplitudesofthewavefunctionofthecoupledsystemandderiveanalyticalexpressionsofthespontaneousemissionspectra.Thenumericalresultsshowthatafewinterestingphenomenasuchasenhancement,narrowing,suppression,andquenchingoftheZPLspontaneousemissioncanberealizedbymodulatingthepolarizationdependentphase,theZeemanshift,andtheintensityofthecontrolfieldinoursystem.Inthedressed-statepictureofthecontrolfield,wefindthatmultiplespontaneouslygeneratedcoherencearisesduetothreeclose-lyingstatesdecayingtothesamestate.Theseresultsareusefulinrealexperiments.

简介：Epidemiologicstudiesuseoutcome-dependentsampling(ODS)schemeswhere,inadditiontoasimplerandomsample,therearealsoanumberofsupplementsamplesthatarecollectedbasedonoutcomevariable.ODSschemeisacost-effectivewaytoimprovestudyefficiency.Wedevelopamaximumsemiparametricempiricallikelihoodestimation(MSELE)fordatafromatwo-stageODSschemeundertheassumptionthatgivencovariate,theoutcomefollowsagenerallinearmodel.Theinformationofbothvalidationsamplesandnonvalidationsamplesareused.Whatismore,weprovetheasymptoticpropertiesoftheproposedMSELE.

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简介：Inthispaper,stochasticglobalexponentialstabilitycriteriafordelayedimpulsiveMarkovianjumpingreaction-diffusionCohen-Grossbergneuralnetworks(CGNNsforshort)areobtainedbyusinganovelLyapunov-Krasovskiifunctionalapproach,linearmatrixinequalities(LMIsforshort)technique,It?formula,Poincar′einequalityandHardy-Poincaréinequality,wheretheCGNNsinvolveuncertainparameters,partiallyunknownMarkoviantransitionrates,andevennonlinearp-Laplacediffusion(p>1).ItisworthmentioningthatellipsoiddomainsinRm(m≥3)canbeconsideredinnumericalsimulationsforthefirsttimeowingtothesyntheticapplicationsofPoincar′einequalityandHardy-Poincar′einequality.Moreover,thesimulationnumericalresultsshowthateventhecorollariesoftheobtainedresultsaremorefeasibleandeffectivethanthemainresultsofsomerecentrelatedliteraturesinviewofsignificantimprovementintheallowableupperboundsofdelays.