简介：Timeresolutionofmultipathdelayprofilesmeasuredbyusingautocorrelationofpseudonoise(PN)codesequenceisgenerallylimitecbythechiprateofthePNcodesequence.Inthispaper,weproposeasimplemethodtoimprovethetimeresolutionofdelayprofilesmeasuredbythePNcorrelationmethod.Effectivenessofthismethodisdemonstratedbyindoorwirelesspropagationexperiments.

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简介：Anoveluniversalpreprocessingmethodisproposedtoestimateanglesofarrival,whichisapplicabletoone-ortwo-dimensionalhighresolutionprocessingbasedonarbitrarycenter-symmetricarrays(suchasuniformlineararrays,equal-spacedrectangularplanararraysandsymmetriccirculararrays).Bymappingthecomplexsignalspaceintotherealone,thenewmethodcaneffectivelyreducethecomputationneededbythesignalsubspacedirectionfindingtechniqueswithoutanyperformancedegradation.Inaddition,thenewpreprocessingschemeitselfcandecorrelatethecoherentsignalsreceivedonthearray.Forregulararraygeometrysuchasuniformlineararraysandequal-spacedrectangularplanararrays,thepopularspatialsmoothingpreprocessingtechniquecanbecombinedwiththenovelapproachtoimprovethedecorrelatingability.Simulationresultsconfirmtheaboveconclusions.

简介：Thisstudyproposesapost-processortoimprovetheharmonicstructureofavowelinanenhancedspeech,enablingthespeechqualitytobeimproved.Initially,aspeechenhancementalgorithmisemployedtoreducethebackgroundnoiseforanoisyspeech.Hencetheenhancedspeechispost-processedbyahybrid-medianfiltertoreducethemusicaleffectofresidualnoise.Sincetheharmonicspectraareimpactedbybackgroundnoiseandaspeechenhancementprocess,thequalityofavowelisdeteriorated.Aharmonicregeneratedmethodisdevelopedtoimprovethequalityofpost-processedspeech.Experimentalresultsshowthattheproposedmethodcanimprovethequalityofpost-processedspeechbyadequatelyregeneratingharmonicspectra.

简介：Powerefficiencyandlinkreliabilityareofgreatimportanceinhierarchicalwirelesssensornetworks(HWSNs),especiallyatthekeylevel,whichconsistsofsensornodeslocatedonlyonehopawayfromthesinknodecalledOHS.ThepowerandadmissioncontrolprobleminHWSNsiscomsideredtoimproveitspowerefficiencyandlinkreliability.Thisproblemismodeledasanon-cooperativegameinwhichtheactiveOHSsareconsideredasplayers.Byapplyingadouble-pricingschemeinthedefinitionofOHSs'utilityfunction,aNashEquilibriumsolutionwithnetworkpropertiesisderived.Besides,adistributedalgorithmisalsoproposedtoshowthedynamicprocessestoachieveNashEquilibrium.Finally,thesimulationresultsdemonstratetheeffectivenessoftheproposedalgorithm.

简介：Thedecisionsconcerningportfolioselectionforarmyengineeringandmanufacturingdevelopmentprojectsdeterminethebenefitofthoseprojectstothecountryconcerned.Projectsaretypicallyselectedbasedonexanteestimatesoffuturereturnvalues,whichareusuallydifficulttospecifyoronlygeneratedafterprojectlaunch.Ascenario-basedapproachispresentedheretoaddresstheproblemofselectingaprojectportfoliounderincompletescenarioinformationandinterdependencyconstraints.Inthefirststage,therelevantdominanceconceptsofscenarioanalysisarestudiedtohandletheincompleteinformation.Then,ascenario-basedprogrammingapproachisproposedtohandletheinterdependenciestoobtaintheprojects,whosereturnvaluesaremulti-criteriawithintervaldata.Finally,anillustrativeexampleofarmyengineeringandmanufacturingdevelopmentshowsthefeasibilityandadvantagesofthescenario-basedmulti-objectiveprogrammingapproach.

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简介：ＮｅｕｒａｌＮｅｔｗｏｒｋＳｉｇｎａｌＰｒｏｃｅｓｉｎｇＡｐｐｒｏａｃｈｆｏｒＤａｍａｇｅＡｓｓｅｓｓｍｅｎｔｉｎＦｉｂｅｒｏｐｔｉｃＳｍａｒｔＭａｔｅｒｉａｌＳｙｓｔｅｍｓａｎｄＳｔｒｕｃｔｕｒｅｓ①②ＴＵＹａｑｉｎｇ（Ｄｅｐａｒｔ．ｏｆＡｕｔｏｍ...

简介：Weappliedthedecisiontreealgorithmtolearnassociationrulesbetweenwebpage’scategory(pornographicornormal)andthecriticalfeatures.Basedontheserules,weproposedanefficientmethodoffilteringpornographicwebpageswiththefollowingmajoradvantages:1)aweightedwindow-basedtechniquewasproposedtoestimatefortheconditionofconceptdriftforthekeywordsfoundrecentlyinpornographicwebpages;2)checkingonlycontextsofwebpageswithoutscanningpictures;3)anincrementallearningmechanismwasdesignedtoincrementallyupdatethepornographickeyworddatabase.

简介：HandoverinDigitalVideoBroadcastingforHandhelds(DVB-H)aimstoprovidecontinuousmobilebroadcastingserviceswhenauseristravelingthroughcellboundaries.Agoodhandovercontrolcanimprovethepowerefficiencyandgainmuchbetterreceptionquality.ThisletterprovidesanovelapproachforDVB-HhandoverbasedonDVB-H/UniversalMobileTelecommunicationsSystem(UMTS)hybridnetwork,whichmovesthemainhandoverfunctionfromtheterminalstothenetworks,sothatitreducestheoperationcomplexityoftheterminalsandincreasesthepowersaving.WhentheterminalcannotreceivetheDVB-Hsignalinthetransmissionshadowareasorbecauseofsomeotherreasons,theUMTSnetworksmayofferthesameservicetouserstomaketheservicecontinuous.AstheUMTSnetworkshavethetopologyoftheDVB-Hnetworks,bycommunicatingwiththeterminals,theUMTSnetworkscanhelptheterminalstopredictthehandover,andavoidunnecessaryhandover.

简介：Themultipleattributedecisionmakingproblemsarestudied,inwhichtheinformationaboutattributeweightsispartlyknownandtheattributevaluestaketheformofintuitionisticfuzzynumbers.Theoperationallawsofintuitionisticfuzzynumbersareintroduced,andthescorefunctionandaccuracyfunctionarepresentedtocomparetheintuitionisticfuzzynumbers.Theintuitionisticfuzzyorderedweightedaveraging(IFOWA)operatorwhichisanextensionofthewell-knownorderedweightedaveraging(OWA)operatorisinvestigatedtoaggregatetheintuitionisticfuzzyinformation.Inordertodeterminetheweightsofintuitionisticfuzzyorderedweightedaveragingoperator,alineargoalprogrammingprocedureisproposedforlearningtheweightsfromdata.Finally,anexampleisillustratedtoverifytheeffectivenessandpracticabilityofthedevelopedmethod.

简介：Anoveldirectsequence(DS)designmethodforsuppressingthenarrowbandinterferenceinDSspreadspectrumultra-widebandreceiversisproposed.Themethodhaslowcomputationalcomplexityandcanbeeasilyimplementedinpracticasystems.Simulationresultsprovethattheproposedmethodieffectivetosuppressthenarrowbandinterference.Therefore,theintegrityofboththeultra-widebandwidthandthenarrowbandsystemscanbehighlyenhanced.更多还原

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简介：为3D网孔模型的watermarking的支持向量机器(SVM)的使用被调查。SVM广泛地为图象，声音，和录像watermarking被探索了，但是没在3Dwatermarking域被探索标明日期SVM的潜力。建议途径为嵌入的水位标为顶点的选择作为一个二进制分类器利用SVM。SVM被训练，特征向量源于eigen正常和从规范的3D网孔模型拿的顶点的一位1戒指邻居的表面正常之间的尖差别。SVM学会作为修正的适当或不恰当的候选人分类顶点以便提供水位标。试验性的结果证实建议算法对象网孔变光滑那样的攻击细微、柔韧，收割并且噪音增加。

简介：Givenanon-equidistantsequenceoranequidistantserieswithoneormoreoutliers,agreyinterpolationapproachconsideringthetimelagsisestablishedforproducingthemissingdataorcorrectingtheabnormalvalues.Toaccomplishthis,anewgreyincidencemodel,calledthegreydynamicincidencemodelGDIM(t),isconstructedfordeterminingwhetherthefactorsareeffectivetotheknownfactorandwhatthetimelagisbetweenausefulfactorandthespecifiedsequence.BasedontheresultsoftheGDIM(t)model,twoprogrammingproblemsaredesignedtoobtaintheupperandlowerboundsoftheunknownorabnormalvalueswhichareregardedasgreynumbers.Thesolutionsbasedontheparticleswarmoptimization(PSO)forthenonlinearprogrammingproblemsaregiven.Toexplainhowitcanbeusedinpractice,thisnewgreyinterpolationapproachisappliedtocorrectanabnormalvalueinthesequenceofanagricultureenvironmentproblem.

简介：Apeer-to-peer(P2P)networkisadistributedapplicationarchitecturewhichprovidesmanyattractivefeatures,suchasavailability,self-organization,load-balancing,andanonymity.However,P2Pnetworkhascreatedsignificantproblemstonetworkoperatorsbygeneratinglargevolumesofinterautonomoussystem(inter-AS)traffic.FocusingontheBitTorrentswarmingprotocol,thispaperproposesanapproachwhichaimstoreduceP2Pgeneratedinter-AStraffic.Inparticular,theapproachcanreduceinter-AStrafficby50%to70%.Moreover,itcanimprovethedownloadingspeedby60%forthepopulartorrents.Theevaluationshowsthatcontrolledregional-basedcontentsreplicationcaneffectivelyachievethisgoal.Furthermore,theapproachisincrementallydeployable.NetworkregionsinwhichthesystemgetsdeployedcansolvetheirP2Pgeneratedinter-AStrafficproblemsautonomously,i.e.,withoutanyInternetserviceproviders-collaborationandanyrequirement,thesystemcanbedeployedintheentireInternet.

简介：Thehigh-densitypopulationleadstocrowdedcities.Thefuturecityisenvisagedtoencompassalarge-scalenetworkwithdiverseapplicationsandamassivenumberofinterconnectedheterogeneouswireless-enableddevices.Hence,greentechnologyelementsarecrucialtodesignsustainableandfuture-proofnetworkarchitectures.Theyarethesolutionsforspectrumscarcity,highlatency,interference,energyefficiency,andscalabilitythatoccurindenseandheterogeneouswirelessnetworksespeciallyinthehomeareanetwork(HAN).Radio-over-fiber(ROF)isatechnologycandidatetoprovideaglobalviewofHAN’sactivitiesthatcanbeleveragedtoallocateorthogonalchannelcommunicationsforenablingwireless-enabledHANdevicestransmission,withconsideringtheclustered-frequency-reuseapproach.Ourproposednetworkarchitecturedesignismainlyfocusedonenhancingthenetworkthroughputandreducingtheaveragenetworkcommunicationslatencybyproposingadataaggregationunit(DAU).TheperformanceshowsthatwiththeDAU,theaveragenetworkcommunicationslatencyreducessignificantlywhilethenetworkthroughputisenhanced,comparedwiththeexistingROFarchitecturewithouttheDAU.

简介：Thispapercombinescompressedsensing(CS)imagingtheoryandrangemigrationalgorithm(RMA),andthenproposesanear-fieldthree-dimensional(3-D)imagingapproachforjointhigh-resolutionimagingandphaseerrorcorrection.Firstly,asparsemeasurementmatrixconstructionmethodbasedonalogisticsequenceisproposed,whichconductsnonlineartransformationforthedeterminedlogisticsequence,makingitobeyuniformdistribution,thenconductssignfunctionmapping,andgeneratesthepseudorandomsequencewithBernoullidistribution,thusleadingtogoodsignalrecoveryunderdown-samplingandeasyavailabilityforengineeringrealization.Secondly,incombinationwiththeRMAimagingapproach,thedictionarywithallsceneinformationandphaseerrorcorrectionisconstructedforCSsignalrecoveryanderrorcorrection.Finally,thenon-quadraticsolutionmodeljointingimagingandphaseerrorcorrectionbasedonregularizationisbuilt,anditissolvedbytwosteps—theseparablesurrogatefunctionals(SSF)iterativeshrinkagealgorithmisadoptedtorealizetargetscatteringestimate;theiterationmodeisadoptedforthecorrectionofthedictionarymodel,soastoachievethegoaloferrorcorrectionandhighly-focusedimaging.Theproposedapproachprovestobeeffectivethroughnumericalsimulationandrealmeasurementinanechoicchamber.Theresultsshowthat,theproposedapproachcanrealizehigh-resolutionimaginginthecaseoflessdata;thedesignedmeasurementmatrixhasbetternon-coherenceandeasyavailabilityforengineeringrealization.Theproposedapproachcaneffectivelycorrectthephaseerror,andachievehighly-focusedtargetimage.