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  • 简介:Anewmethodisproposedforidentifyingoutliersinthedirection-of-arrival(DOA)dataofasourceobservedfromalineararraysonar.Supposeasourcemovesuniformlyalongastraightline.Themethodforidentifyingoutliersconsistsofthreesteps.(i)Dividethedataintogroups,eachwithfoursamplepoints,anddeletecertaintwosamplepointsfromeverygroupbymeansofarobustmethodpesentedinthispaper.Whenthepercentageoftheoutliersislessthan50%,thereexistsatleastonegroupinwhichtheremainingtwosam-plepointsare"good".(ii)EstimatetheDOAanditsChangerate,(θ0,θ0),usingtheremainingtwosimplepointsofeverygroup,andcomputetheobjectivefunctionsofM-etsimatorusingtheresultingestimatesofallgroupsrespectively.A"good"estimateof(θ0,θ0),whichminmizestheobjec-tivefunctionisthenobtained.(iii)IteratetheM-estimatorwiththe"good"esti-mateof(θ0,θ0)astheinitialvalue,obtainanaccurateestimateof(θ0,θ0),andidentifyoutliersintheobserveddatausi

  • 标签: identifying straight ESTIMATOR<
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  • 简介:Prosodiccontrolisanimportantpartofspeechsynthesissystem.Prosodicparameterschoicerightorwronginfluencesthequalityofsyntheticspeechdirectly.Atpresent,texttospeechsystemhaslesseffectivedescribetoreflectdatarelationshipsinthecorpus.Anewresearchapproach-dataminingtechnologytodiscoverthoserelationshipsbyassociationrulesmodelingispresented.Andanewalgorithmforgeneratingassociationrulesofprosodicparametersincludingpitchparametersanddurationparametersfromcorpusisdeveloped.Theoutputrulesimprovethecorrectnessofsyllablechoiceintexttospeechsystem.

  • 标签: 物质文明 坚持 优质 体育 建筑
  • 简介:ThesynchrodoublepulsesignalmodeisfreuqentlyusedinShortBaseLine(SBL)underwaterpositioningsystemsoastoobtaintheinforma-tionofbothdistanceanddepthofatargetsimultaneously.Howerer,thissignalmodealsobringsaboutrangingindistinctnessresultinginashorterpositioningdistancemuchlessthanthatlimitedbytheperiodofthesynchrosignal.Thispaperpresentsahardwaredistance-gatedataacquiringscheme.Itputstheoriginaldatasenttothecomputerinorderof"directfirstpulse—depthinformationpulse(orfirstpulsereflectedbywatersurface)…"toguaranteetheeffectivepositioningdistanceofthesystem.Ithastheadvan-tageofreducingtheprocessingtimeofthecomputerthusensuringtherealtimefunctioningofthesystem.Afigureoftheorbitofanunderwatermovingtargetmeasuredinpracticeisattachedtotheendofthepaper.

  • 标签: positioning underwater reflected GUARANTEE FIGURE acquiring
  • 简介:Toaimattheproblemthatthehorizontaldirectivityindexofthevectorhydrophoneverticalarrayisnothigherthanthatofavectorhydrophone,thehigh-resolutionazimuthestimationalgorithmbasedonthedatafusionmethodwaspresented.TheproposedalgorithmfirstemploysMUSICalgorithmtoestimatetheazimuthofeachdividedsub-bandsignal,andthentheestimatedazimuthsofmultiplehydrophonesareprocessedbyusingthedatafusiontechnique.Thehigh-resolutionestimatedresultisachievedfinallybyadoptingtheweightedhistogramstatisticsmethod.TheresultsofthesimulationandseatrialsindicatedthattheproposedalgorithmhasbetterazimuthestimationperformancethanMUSICalgorithmofasinglevectorhydrophoneandthedatafusiontechniquebasedontheacousticenergyfluxmethod.Thebetterperformanceisreflectedintheaspectsoftheestimationprecision,theprobabilityofcorrectestimation,thecapabilitytodistinguishmulti-objectsandtheinhibitionofthenoisesub-bands.

  • 标签: 估计算法 高分辨率 方位角 融合法 矢量水听器 数据融合技术