简介:Recently,Cristofaro-GardinerandHutchingsprovedthatthereexistatleasttwoclosedcharacteristicsoneverycompactstar-shapedhypersufaceinR~4.ThenGinzburg,Hein,Hryniewicz,andMacarinigavethisresultasecondproof.Inthispaper,wegiveitathirdproofbyusingindexiterationtheory,resonanceidentitiesofclosedcharacteristicsandaremarkabletheoremofGinzburgetal.
简介:Inthisarticle,theauthorsshowtheexistenceofglobalsolutionoftwo-dimensionalviscousCamassa-Holm(Navier-Stokes-alpha)(NS-α)equations.TheauthorsalsoprovethatthesolutionoftheNS-αequationsconvergestothesolutionofthe2DNSequationsintheinviscidlimitandgivetheconvergencerateofthedifferenceofthesolution.
简介:1.IntroductionThetwcawayerrorcomponentregressionmodelmsybeexpressedasif=o+
简介:Thisarticleprovestheexistenceanduniquenessofsolutiontotwo-parameterstochasticVolterraequationwithnon-LipschitzcoefficientsanddrivenbyBrowniansheet,wherethemaintoolisBihari'sinequalityintheplane.Moreover,wealsodiscussthetimeregularitypropertyofthesolutionbyKolmogorov'scontinuitycriterion.
简介:Inthisarticle,weconsideratwo-componentnonlinearshallowwatersystem,whichincludesthefamous2-componentCamassa-HolmandDegasperis-Procesiequationsasspecialcases.Thelocalwell-posedessforthisequationsisestablished.Somesufficientconditionsforblow-upofthesolutionsinfinitetimearegiven.Moreover,byseparationmethod,theself-similarsolutionsforthenonlinearshallowwaterequationsareobtained,andwhichlocalorglobalbehaviorcanbedeterminedbythecorrespondingEmdenequation.
简介:Inthisarticle,weintroduceanewviscosityiterativemethodfortwononexpansivemappingsinHilbertspaces.Wealsoprove,withoutcommutativityassumption,thattheiteratesconvergetoacommonfixedpointofthemappingswhichsolvessomevariationalinequality.TheresultspresentedextendthecorrespondingresultsofShimizuandTakahashi[T.Shimizu,W.Takahashi,Strongconvergencetocommonfixedpointoffamiliesofnonexpansivemappings,J.Math.Anal.Appl.211(1997),71-83],andYaoandChen[Y.Yao,R.Chen,ConvergencetocommonfixedpointsofaveragemappingswithoutcommutativityassumptioninHilbertspaces,NonlinearAnalysis67(2007),1758-1763].
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简介:Anon-autonomouscompetingsystemisinvestigatedinthispaper,wherethespeciesxcandiffusebetweentwopatchesofaheterogeneousenvironmentwithbarriersbetweenpatches,butforspeciesy,thediffusiondoesnotinvolveabarrierbetweenpatches,furtheritisassumedthatalltheparametersaretimedependent.Itisshownthatthesystemcanbemadepersistentundersomeappropriateconditions.Moreover,sufficientconditionsthatguaranteetheexistenceofauniquepositiveperiodicorbitwhichisgloballyasymptoticstablearederived.
简介:Weintroduceaone-stepimplicititerativemethodfortwofinitefamiliesofasymp-toticallynonexpansivemappingsinahyperbolicspaceanduseittoapproximatecommonfixedpointsofthesefamilies.Theresultspresentedinthispaperarenewinthesettingofhyperbolicspaces.Ontop,thesearegeneralizationsofseveralresultsinliteraturefromBanachspacestohyperbolicspaces.Attheendofthepaper,wegiveanexampletovalidateourresults.
简介:Thispaperconsidersaschedulingproblemintwo-stagehybridflowshop,wherethefirststageconsistsoftwomachinesformedanopenshopandtheotherstagehasonlyonemachine.Theobjectiveistominimizethemakespan,i.e.,themaximumcompletiontimeofalljobs.WefirstshowtheproblemisNP-hardinthestrongsense,thenwepresenttwoheuristicstosolvetheproblem.Computationalexperimentsshowthatthecombinedalgorithmofthetwoheuristicsperformswellonrandomlygeneratedprobleminstances.
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简介:Epidemiologicstudiesuseoutcome-dependentsampling(ODS)schemeswhere,inadditiontoasimplerandomsample,therearealsoanumberofsupplementsamplesthatarecollectedbasedonoutcomevariable.ODSschemeisacost-effectivewaytoimprovestudyefficiency.Wedevelopamaximumsemiparametricempiricallikelihoodestimation(MSELE)fordatafromatwo-stageODSschemeundertheassumptionthatgivencovariate,theoutcomefollowsagenerallinearmodel.Theinformationofbothvalidationsamplesandnonvalidationsamplesareused.Whatismore,weprovetheasymptoticpropertiesoftheproposedMSELE.