学科分类
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46 个结果
  • 简介:ThetraditionalGaussianMixtureModel(GMM)forpatternrecognitionisanunsupervisedlearningmethod.Theparametersinthemodelarederivedonlybythetrainingsamplesinoneclasswithouttakingintoaccounttheeffectofsampledistributionsofotherclasses,hence,itsrecognitionaccuracyisnotidealsometimes.ThispaperintroducesanapproachforestimatingtheparametersinGMMinasupervisingway.TheSupervisedLearningGaussianMixtureModel(SLGMM)improvestherecognitionaccuracyoftheGMM.Anexperimentalexamplehasshownitseffectiveness.TheexperimentalresultshaveshownthattherecognitionaccuracyderivedbytheapproachishigherthanthoseobtainedbytheVectorQuantization(VQ)approach,theRadialBasisFunction(RBF)networkmodel,theLearningVectorQuantization(LVQ)approachandtheGMM.Inaddition,thetrainingtimeoftheapproachislessthanthatofMultilayerPerceptrom(MLP).

  • 标签: 模式识别 高斯混合模型 机器学习
  • 简介:Thesurfaceemittingmicrocavityisformedbysandwichingapolymerfilmcontainingpoly(para-phenylenevinylene)(BMPPV)andpoly(N-vinylcarbazole)(PVK)betweenaDBRwithareflectivityof99.5%andasilverfilm.Thesampleisopticallypumpedbya337.1nmlineofnitrogenlaserwith10nspulsesat20Hzrepetitionrate.ThelasingphenomenonisobservedinBMPPVandPVKmixturemicrocavity.Thefullwidthathalfmaximum(FWHM)is6nmatthepeakwavelengthof460nm.Thelasingthresholdenergyisestimatedtobeabout5μJ.

  • 标签: 聚合物激光 |
  • 简介:Thispaperpresentsaninvestigationonstrengthofcementdeepmixing(CDM)mixture.Fourtypicalworksofoffshoreorland-basedprojectsareintroduced.Withsamplesfromtheseprojectsandlaboratorytests,statisticalanalysisismadeontheincrementlawofthestrengthofcement-soilmixturewithdifferentamountofcement,andstrengthsunderdifferentworkingconditionsarecompared.Itisfoundthattheamountofcementinthecement-soilmixtureiscloselyrelatedtotheunconfinedcompressivestrengthofthemixture.Attheageof90d,theunconfinedcompressivestrengthofthecement-soilmixtureincreasedby0.054Mpa-0.124Mpawitheachcementincreasing10kg/m3inthecement-soilmixture,averagelyincreasedby0.085Mpa,whilethatattheageof120dincreasedby11%incomparison.Thequalityofthecement-soilmixtureshouldbecomprehensivelyevaluatedinaccordancewiththetrimmedaverageofstrength,coefficientofvariationandrockqualitydesignation(RQD)indicatorsofsamplingratio.

  • 标签: CDM混合物 取样 无约束压力 统计学分析 质量评估 水泥粘合剂
  • 简介:ConstructingareasonablereactionkineticmodelforCr-containingwasteincinerationisofhighsignificancetostudytheeffectofvariousfactors,suchastemperature,Cl,onitshexavalentchromiumcompounds.Inthispaper,aprimaryCr/H/Air/ClreactionkineticmodelisbuiltandstudiedbyGaussian03codewithquantumchemistrytheory.Numericalresultsshowthattherearetwooverallreactionsinthemodel,eachofthetwooverallreactionsconsistsoftheirrespectivetwoelementaryreactions.Sothetwooverallreactionsshouldbeomittedfromthemodel.Instead,thefourelementaryreactionsshouldbeaddedintheCr/H/Air/Clreactionkineticmodel.Theactivationenergiesofthefourelementaryreactionsarealsocalculated.

  • 标签: 动力学模型 高氯 空气 小时 反应活化能 CR
  • 简介:自愿的云是云计算的一个新范例。它与一些好预备的云一起提供一种其他的选择。然而,在不明确的时间跨越那参加者份额他们在自愿的云的计算资源,有一些,质问问题,即,变化,在能力下面并且低利益。在这份报纸,体系结构首先基于Bittorrent协议被建议。在这体系结构,资源能从保留的例子市场被保留或请求并且能在一个短圆与更低的价格被存取。实际上,这些资源能填满不适当的资源在自愿的云分享并且减轻变化和在能力下面问题。然后,每个节点的差错率被用来评估它的分享的时间的无常。由利用一个线性预言模型,它被被用于评估系统的计算能力的一个分发函数启用。而且,费用优化问题被调查,一个计算方法被介绍在自愿的云解决低利益的问题。最后,系统表演被模拟的二个集合验证。并且试验性的结果为资源保留优化显示出我们的计算方法的有效性。

  • 标签: BITTORRENT协议 市场 实例 混合体 资源共享 计算能力
  • 简介:Inthispaper,severalmixtruerulesofsoundvelocityandtheirusefulnessincharacterizingthecomponentsofbiomediumareanalysed.Itispointedoutthatforcharacterizingthecomponentsofbiomedium,therulesarecompatiblewitheachotherundercertainconditions,andtheerrorsbetweeneachruleandrealsoundvelocityarediffferent.Itconcludesthatthereisnogeneralrulesuitableforvariousmediaamongabovementionedrules.

  • 标签: SOUND VELOCITY MIXTURE RULES Biomedium.
  • 简介:AnewmethodologyofvoiceconversionincepstrumeigenspacebasedonstructuredGaussianmixturemodelisproposedfornon-parallelcorporawithoutjointtraining.Foreachspeaker,thecepstrumfeaturesofspeechareextracted,andmappedtotheeigenspacewhichisformedbyeigenvectorsofitsscattermatrix,therebytheStructuredGaussianMixtureModelintheEigenSpace(SGMM-ES)istrained.Thesourceandtargetspeaker’sSGMM-ESarematchedbasedonAcousticUniversalStructure(AUS)principletoachievespectrumtransformfunction.Experimentalresultsshowthespeakeridentificationrateofconversionspeechachieves95.25%,andthevalueofaveragecepstrumdistortionis1.25whichis0.8%and7.3%higherthantheperformanceofSGMMmethodrespectively.ABXandMOSevaluationsindicatetheconversionperformanceisquiteclosetothetraditionalmethodundertheparallelcorporacondition.TheresultsshowtheeigenspacebasedstructuredGaussianmixturemodelforvoiceconversionunderthenon-parallelcorporaiseffective.

  • 标签: 高斯混合模型 语音转换 特征空间 结构化 倒谱 语料库
  • 简介:我们为斜Bellstates的任意的混合的远距传物建议一个协议,隧道能与混合的纯最大地纠缠的statesor绑了的任何一个被构造,这被显示出纠缠的状态。我们也介绍协议认识到经由多粒子的斜贝尔状态的控制teleportationof混合混合了状态。我们的结果证明boundentangled状态也是在量通讯任务的重要、有用的资源。

  • 标签: 量子论 隐形传输 纠缠状态 混合状态
  • 简介:Thispaperisconcernedwiththestatisticalmodelingofthedependencestructureofmultivariatefinancialdatausingthecopula,andtheapplicationofcopulafunctionsinVaRvaluation.Aftertheintroductionofthepurecopulamethodandthemaximumandminimummixturecopulamethod,authorspresentanewalgorithmbasedonthemoregeneralizedmixturecopulafunctionsandthedependencemeasure,andapplythemethodtotheportfolioofShanghaistockcompositeindexandShenzhenstockcomponentindex.Comparingwiththeresultsfromvariousmethods,onecanfindthatthemixturecopulamethodisbetterthanthepureGaussiancopulamethodandthemaximumandminimummixturecopulamethodondifierentVaRlevel.

  • 标签: 混合物 应用 风险管理 基于模型 a函数 数据依赖
  • 简介:TheobjectiveofthisstudywastoinvestigateandevaluatetherheologicalandmoisturesusceptibilityoftheWMAmixturescontainingmoistaggregates.Theexperimentaldesignincludedtheutilizationsoftwoaggregatesources,twomoisture,twoanti-strippingadditives,andthreeWMAadditivesandcontrol.Severalpropertiesofthebindersandmixtureswereobtainedincluding:viscosity,dynamicshearrheometer,beambendingrheometerofWMAbinders,indirecttensilestrength(ITS),tensilestrengthratio(TSR),andflowvalues.TheexperimentalresultsindicatethattheWMAadditivescanresultinaslightdecreaseinviscosityandanincreaseinfailuretemperature.Inaddition,themoisturesusceptibilityresultsillustratedthatthemixturescontainingmoistaggregatesgenerallyhavesimilarITSvaluestoothermixturesregardlessofHMAorWMAtypes.Moreover,therewerenosignificantdifferencesinthewetITSvaluesofWMAmixtureamongstfourtypesofmixturesunderidenticalconditions(samemoistureandlimecontents)exceptforthemixturescontainingliquidanti-strippingadditiveandAsphaminadditive.

  • 标签: 碎石混合料 流变性能 WMA 水稳定性 动态剪切流变仪 液态混合物
  • 简介:Countdatawithexcesszerosareoftenencounteredinmanymedical,biomedicalandpublichealthapplications.Inthispaper,anextensionofzero-inflatedPoissonmixedregressionmodelsispresentedfordealingwithmultileveldataset,referredashierarchicalmixturezero-inflatedPoissonmixedregressionmodels.AstochasticEMalgorithmisdevelopedforobtainingtheMLestimatesofinterestedparametersandamodelcomparisonisalsoconsideredforcomparingmodelswithdifferentlatentclassesthroughBICcriterion.AnapplicationtotheanalysisofcountdatafromaShanghaiAdolescenceFitnessSurveyandasimulationstudyillustratetheusefulnessandeffectivenessofourmethodologies.

  • 标签:
  • 简介:直接模拟蒙特卡罗(DSMC)方法被介绍在多部件气体混合物为声学的繁殖建模。并且声学的变细的一个理论预兆的模型被建议,它不依靠经验的参数。各种各样的多部件气体混合物的声学的变细系列,由氮,氧,二氧化碳,甲烷和水组成,被DSMC方法估计。兴趣的健全频率范围从8MHz到232MHz。与基于DL,加古典变细的模型由Stokes-Kirchhoff公式计算了的松驰变细的结果相比,我们的模型的声学的变细的评价同意了他们。模型的精确取决于变细从产生的分子碰撞的物理机制的理解。另外,我们的模型的结果证明频率依赖者的人物声学的变细依靠煤气的混合物的作文。并且这能导致能够在各种各样的环境和进程决定煤气的作文的份量上的聪明的声学的煤气的传感器的开发。

  • 标签: 气体混合物 声衰减 多组分 数值模拟 非线性 直接模拟蒙特卡罗
  • 简介:EvaluationofhightemperatureperformanceofSBS-modifiedasphaltmixturewaspresented.Bothwheelloadedmethodandcreepmethodwereadoptedfortwodifferentmixturesandtwokindsofspecimenswithdifferentheight,andcorrespondingindicatorsweremeasured.Meanwhile,thecorrelationbetweentheseindicatorswasthoroughlyanalyzedandtwokindsofmixtureswerecompared.TheexperimentalresultsshowthatthereisagoodlinearrelationshipbetweenLWTindicatorsandCTindicatorsforM-13,whilearelativelypoorrelationshipforM-25,especiallythatbetweendynamicstiffnessandstaticstiffnessandthatbetweendynamicstabilityandstaticcreepstiffness.Besides,logarithmicrelationshipbetweenDSandRDhasahigherdeterminationcoefficientthanthatforlinearrelationship.Thus,multi-indexevaluationshouldbetakenforsyntheticallyassessinghightemperatureperformanceofasphaltmixture.

  • 标签: 改性沥青混合料 高温性能 SBS 线性关系 静态刚度 动态稳定性
  • 简介:FordeterminingtheoptimalpercentageofRAPmaterialincentralplanthotrecycling,binderwasrecoveredfromRAPbymeansofAbsonrecoverymethod,andpropertiestestsofmixedbindersconsistingofrecoveredasphaltandfreshasphaltatdifferentratioswereperformed.Inaddition,theperformancesofmixturewithdifferentpercentagesofRAPsuchasruttingresistance,anti-cracking,moisturesusceptibilityandfatigueresistanceweretested.ThebindertestresultsshowedthatthehightemperatureperformancewasimprovedwiththeincreaseofthepercentageoftheRAP,whilethelowtemperatureperformancewasdeclined.Whenthepercentageoftherecoveredbinderwaslessthan30%,themixedbindercouldmatchthetechnicalstandardsforfreshasphalt.TestsonthemixturesshowedthatruttingresistanceincreasedgraduallyasRAPpercentageincreased,whilethermalanti-crackingatlowtemperatureandfatiguepropertiesdeclined.TheeffectofthepercentageofRAPonmoisturesusceptibilitywaslimited.ItisindicatedthatlowtemperatureperformanceandfatiguepropertiesareimportantforselectingtheoptimalpercentageofRAP.Basedondataobtainedfrombindersandmixtures,itisconcludedthatthemaximumpercentageofRAPisapproximately30%withouttheadditionofrejuvenatingagent.

  • 标签: 沥青路面再生 最佳比例 热再生 工厂 中央 混合料
  • 简介:Toefficientlydecreasethesizeofparametersandimprovetherobustnessofparameterstraining,afuzzyclusteringbasedphonetictied-mixturemodel,FPTM,ispresented.TheGaussiancodebookofFPTMissynthesizedfromGaussiancomponentsbelongingtothesamerootnodeinphoneticdecisiontree.FuzzyclusteringmethodisfurtherusedforFPTMcovariancesharing.ExperimentalresultsshowthatcomparedwiththeconventionalPTMwithapproximatelythesameparameterssize,FPTMdecreasethesizeofGaussianweightsby77.59%andincreaseswordaccuracyby7.92%,whichprovesGaussianfuzzyclusteringisefficient.ComparedwithFPTM,covariance-sharedFPTMdecreasesworderrorrateby1.14%,whichprovesthecombinedfuzzyclusteringforbothGaussianandcovarianceissuperiortoGaussianfuzzyclusteringalone.

  • 标签: 失真-偏聚分析 语音矩阵 HMM 鲁棒性
  • 简介:TheeffectsonhepaticEROD(7-ethoxyresorufinO-deethylase)inMugilso-iuyexposedtobenzo(a)pyrene(BaP),pyreneandtheirmixturesofequalconcentrationwereinvestigated,atconcentrationsof0.1,1.0,5.0,10.0,50.0μg/dm3,inexperimentalcondition.Time-effectsanddoseresponseofthebiochemicalindexswereobserved.TheresultsshowedthatthehepaticERODactivitieswereinducedbytheexposureofBaP,pyreneandtheirmixturesathighconcentration.Dose-responseconnectionswerethatthehepaticERODactivitieswereelevatedwithincreasingconcentrationofthepollutants.ThecombinedeffectofBaPandpyreneat1:1concentrationratioonhepaticERODactivitywasantagonism.

  • 标签: 生物化学 EROD 活性 PAHS 鲻鱼
  • 简介:Theperformanceofawell-designedlayerofsand,andcompositeslikelayerofsandmixedwithshreddedrubbertire(RSM)aslowcostbaseisolators,isstudiedinshaketabletestsinthelaboratory.Thebuildingfoundationismodeledbya200mmby200mmand40mmthickrigidplexi-glassblock.Theblockisplacedinthemiddleofa1mby1mtankfilledwithsand.Theselectedbaseisolatorisplacedbetweentheblockandthesandfoundation.Accelerometersareplacedontopofthefootingandfoundationsandlayer.ThedisplacementofthefootingisalsomeasuredbyLVDT.Thewholesetupismountedonashaketableandsubjectedtosinusoidalmotionswithvaryingamplitudeandfrequency.Sandisfoundtobeeffectiveonlyatveryhighamplitude(>0.65g)ofmotions.Theperformanceofacompositeconsistingofsandand50%shreddedrubbertireplacedunderthefootingisfoundtobemostpromisingasalow-costeffectivebaseisolator.

  • 标签: SHAKE TABLE TEST base isolation shredded