简介：你也许知道mean的中文意思是“意思”，但这只是其一，mean这个词还有很多意思呢，想知道吗？请往下看!

简介：

简介：

简介：我们使用二个多项式到结果讨论一致的根，然后我们在情况r=在特性和的吝啬的价值上改进伯吉斯的结果3。最后，我们在情况r=为特性和的吝啬的价值给新估计4。关键词结果-多项式-特性先生(2000)题目分类11L40

简介：作者考虑光滑的沉浸F的一个家庭(趇??鮼触鞭裦螥觧1吗？？

简介：Inthispaper,weproposeadimension-reducing,K-meanclusteringprocedurebyProjectionPursuit(PP)techniquesoastoexploretheclusteringstructureofdatainhigh-dimensionalspaceintermsoflow-dimensionalprojectivepointsofdata,andweobtainthea.s.consistenceoftheestimatesoftheclustercentersandprojectionorientations.

简介：ＭＥＡＮＶＡＬＵＥＯＦＡＮＡＬＹＴＩＣＯＰＥＲＡＴＯＲＦＵＮＣＴＩＯＮＳＹｕＸｉａｏｐｅｉ（喻小培）（Ｄｅｐｔ．ｏｆＭａｔｈ．，ＣｅｎｔｒａｌＣｈｉｎａＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，Ｗｕｈａｎ４３００７０，Ｃｈｉｎａ）ＪｉａｎＭｉｎｇ（蹇明）（Ｄ...

简介：在这篇论文，我们为多项式建立L~q不平等，它特别地产出一些Zygmund类型不平等的有趣的归纳。

简介：

简介：Inordertogiveacompleteandaccuratedescriptionaboutthesensitivityofefficientportfoliostochangesinassets'expectedreturns,variancesandcovariances,thejointeffectofestimationerrorsinmeans,variancesandcovariancesontheefficientportfolio'sweightsisinvestigatedinthispaper.Itisprovedthattheefficientportfolio'scompositionisaLipschitzcontinuous,differentiablemappingoftheseparametersundersuitableconditions.Thechangerateoftheefficientportfolio'sweightswithrespecttovariationsaboutriskreturnestimationsisderivedbyestimatingtheLipschitzconstant.Ourgeneralquantitativeresultsshowthattheefficientportfolio''sweightsarenormallynotsosensitivetoestimationerrorsaboutmeansandvariances.Moreover,wepointoutthoseextremecaseswhichmightcausestabilityproblemsandhowtoavoidtheminpractice.Preliminarynumericalresultsarealsoprovidedasanillustrationtoourtheoreticalresults.

简介：在这篇论文，我们在联合起来的磁盘D上学习Hakopian插值的加权的吝啬的不可分的集中。我们出现在Hakopian插值多项式Hn之间的内部产品(f；x，y)；光滑的功能g(x，y)在D上收敛到f的(x，y)；g(x，y)在D上什么时候n→8f(x，y)属于C(D)；g的所有第一部分衍生物(x，y)属于空间嘴唇M[α](0<α≤1)。我们进一步证明那提供了g的所有秒部分的衍生物(x，y)也属于空间嘴唇M[α]；f(x，y)属于C[1](D)，在Hakopian插值的部分衍生物之间的内部产品多项式；g(x，y)在D上收敛到那在之间；g(x，y)在D上什么时候n→∞。

简介：Somediseasesotherthancardiacdiseasecanbe“prevented”,butthepurposeofthiscommunicationwrittenbyaclinicalcardiologist,notasapreventionspecialist,istofocusstrictlyoncardiovasculardisease.Thedefinitionofpreventivemedicineinsimplesttermsmeanskeepingyourpatienthealthy.Inadditiontomaintaininghealth,ofcourse,wewanttopreventthedisabilityassociatedwithcardiacdiseaseaswellasdeathintheyoungerperson.

简介：

简介：TheDeGrootmodelisoneofthemostclassicalmodelsinthefieldofopiniondynamics.ThestandardDeGrootmodelassumesthatagentsarehomogeneousandupdatetheiropinionsinthedirectionofaweightedaverageoftheirneighbors'opinions.Onenaturalquestioniswhetherasecondtypeofagentscouldsignificantlychangethemainpropertiesofthemodel.Theauthorsaddressthisquestionbyintroducingrebels,whoupdatetheiropinionstowardtheoppositeoftheirneighbors'weightedaverage.Theauthorsfindthattheexistenceofrebelsremarkablyaffectstheopiniondynamics.Undercertainmildconditions,theexistenceofafewrebelswillleadthegroupopiniontothegoldenmean,regardlessoftheinitialopinionsoftheagentsandthestructureofthelearningnetwork.ThisresultiscompletelydifferentfromthatofthestandardDeGrootmodel,wherethefinalconsensusopinionisdeterminedbyboththeinitialopinionsandthelearningtopology.Thestudythenprovidesnewinsightsintounderstandinghowheterogeneousindividualsinagroupreachconsensusandwhythegoldenmeanissocommoninhumansociety.

简介：Theweightedarithmeticalmeancomplexjudgementmatrix(WAMCJM)isthemostcommonmethodforaggregatinggroupopinions,butithasashortcoming,namelytheWAMCJMoftheperfectlyconsistentjudgementmatricesgivenbyexpertscanotguaranteeitsperfectconsistency.AnupperboundoftheWAMCJM'sconsistencyispresented.Simultaneously,acompatibilityindexofjudgingtheaggregatingextentofgroupopinionsisalsointroduced.TheWAMCJMisofacceptableconsistencyandisprovedprovidedthecompatibilitiesofalljudgementmatricesgivenbyexpertsaresmallerthanthethresholdvalueofacceptableconsistency.Theseconclusionsareimportanttogroupdecisionmaking.

简介：Inthispaper,westudytheasymptoticCUSUMtestsfordetectingchangesinthemeanorvarianceofamoving-averageprocesswithlongmemory.Whenthereisnochangeover[O,T],theasymptoticdistributionoftheteststatisticisderived,whichallowsustofindasymptoticcriticalvalues.Whenthereisachange,thebehavioroftheteststatisticisdiscussed.Conditionsfortheconsistencyofthesetestsarealsodiscussed.Basedontheasymptoticresults,simulationstudiesoftestingforchangesinthemeanshowthattheCUSUMtestproposedperformswell.

简介：

简介：

简介：最大的原则被使用在R正常速度被仅仅取决于吝啬的弯曲的光滑的功能f给的n+1,。由估计的使用，一些推论包括不可分的Harnack不平等被获得。特别地，条件与流动的答案与哪个是翻译soliton或膨胀soliton被给。

简介：ForaBanachSpaceXGarcia-FalsetintroducedthecoefficientR(X)andshowedthatifR(X)<2thenXhasafixedpoint.Inthispaper,wedefineameannon-expansivemappingTonXinthesensethat‖Tx-Ty‖≤a‖x-Y‖+b‖x-Ty‖foranyx,y∈X,wherea,5≥0,a+b≤1.WeshowthatifR(X)<2/(1+b)thenThasafixedpointinX.