简介：ThelimitsofparameterγinFASTTCParestudiedinthispaper.AcontinuoustimefluidflowmodelofthelinkbufferisconsideredtocreatealinearcontrolsystemrelatedtoFASTTCP.Linearingthefluidflowmodelandwindowcontrolmodel,theLaplacetransformversionofcongestioncontrolsystemarepresented.Itresultsinanegativefeedbacksystemwithopenlooptransferfunction.WiththeanalysisofNyquistcurveofthesystem,asufficientconditiononasymptoticalstabilityofFASTTCPcongestionwindowrelatedtotheparameterγisobtained.Packetlevelns-2simulationsareusedtoverifythetheoreticalclaims.

简介：Amongtheavailableclusteringalgorithmsindatamining,theCLOPEalgorithmattractsmuchmoreattentionwithitshighspeedandgoodperformance.However,theproperchoiceofsomeparametersintheCLOPEalgorithmdirectlyaffectsthevalidityoftheclusteringresults,whichisstillanopenissue.Forthispurpose,thispaperproposesafuzzyCLOPEalgorithm,andpresentsamethodfortheoptimalparameterchoicebydefiningamodifiedpartitionfuzzydegreeasaclusteringvalidityfunction.TheexperimentalresultswithrealdatasetillustratetheeffectivenessoftheproposedfuzzyCLOPEalgorithmandoptimalparameterchoicemethodbasedonthemodifiedpartitionfuzzydegree.

简介：ＮｅｗＭｅｔｈｏｄｏｆＰａｒａｍｅｔｅｒＩｄｅｎｔｉｆｉｃａｔｉｏｎｂｙＵｓｉｎｇＷａｌｓｈＭａｔｒｉｘ①ＹＡＯＬｉｎｇｓｈｉ（ＹａｎｓｈａｎＵｎｉｖｅｒｓｉｔｙ，Ｑｉｎｈｕａｎｇｄａｏ０６６００４，ＣＨＮ）Ａｂｓｔｒａｃｔ：ＢｙｕｓｉｎｇＷａｌｓｈ...

简介：侦察混血儿雷达信号的一条参数评价途径联合了调音的频率移动(频移键控)，调音的阶段移动(PSK)被介绍。第一，多相的差别被采用计算即时频率(如果)FSK/PSK，那么，频移键控的频率点从直方图被估计如果。PSK的代码率从阶段断绝的地点被提取。最后，收到的信号的平方的多相的差别被计算估计频移键控的代码率。当signal-to-noise比率(SNR)在11dB上面时，介绍算法有参数评价的更高的精确性。

简介：Thispaperstudiestheexponentialstabilityofintervaltime-varyingdynamicalsystemwithmultidelay.Bythematrixmeasureanddelaydifferentialinequality,somesufficientconditionsforexponentialstabilityofintervaltime-varyingdynamicalsystemwithmultidelayareestablished.Theseconditionsareanimprovementandextensionoftheresultsachievedinearlierpapers.Finally,anumericalexampleisgiventodemonstrateourresult.

简介：Thecontrollabilityandobservabilityofnetworkedcontrolsystemsarestudied.Aimingatthenetworkedcontrolsystemwithtime-varyingdelay,thesufficientandnecessaryconditionsforcompletecontrollabilityandcompleteobservabilityofthesystemarepresented,respectively.BecauseofMarkovcharacteristicofthenetwork-induceddelay,intermsofstochastictheory,asufficientandnecessaryconditionforcompletelymeanvaluecontrollabilityofnetworkedcontrolsystemsisobtained.Further,theconditionsthatthecontrollabilityandobservabilityofnetworkedcontrolsystemsareequivalenttotheinitialtime-invariantsystemaregiven.Controllabilityandobservabilityrealizationindexesarealsodiscussed,respectively.Thenumericalexampledemonstratestheeffectivenessoftheproposedtheory.

简介：Inthispaper,exponentialstabilityofHopfield-typeneuralnetworkswithtime-varyingdelaysareanalyzed.ByusingtheLyapunovfunctionalmethod,sufficientconditionsareobtainedforgeneralexponentialstabilities.Atthesametime,theoutputfunctionsdonotsatisfytheLipschitzconditionsanddonotrequiretherntobedifferentialorstrictlymonotonouslyincreasing.Moreover,allresultsareestablishedwithoutassuminganysymmetryoftheconnectionmatrix.Amtmericexampleispressentedtoshowtheeffectiveofthesecriteria.

简介：Thereadoutintegratedcircuit(ROIC)technologyisoneofthecriticaltechnologiesintheresearchofaninfraredfocalplanearray(IRFPA).Basedonthevirtualinstrumenttechnology,asystemforparametertestofROICisdevelopedforIRFPA.Thecomplexprogrammablelogicdevice(CPLD)isappliedintothesystemtoincreaseitsflexibility.Withhighreliabilityandprecision,alongwiththeintegratedsoftwareandhardwareenvironment,thesystemcantestallkindsofROICs.

简介：Accordingtothebiasedanglesprovidedbythebistaticsensors,thenecessaryconditionofobservabilityandCramer-Raolowboundsforthebistaticsystemarederivedandanalyzed,respectively.Additionally,adualKalmanfiltermethodispresentedwiththepurposeofeliminatingtheeffectofbiasedanglesonthestatevariableestimation.Finally,Monte-Carlosimulationsareconductedintheobservablescenario.Simulationresultsshowthattheproposedtheoryholdstrue,andthedualKalmanfiltermethodcanestimatestatevariableandbiasedanglessimultaneously.Furthermore,theestimatedresultscanachievetheirCramer-Raolowbounds.

简介：Anewadaptiveestimatorfordirectsequencespreadspectrum(DSSS)signalsusingfourth-ordercumulantbasedadaptivemethodisconsidered.Thegeneralhigher-orderstatisticsmaynotbeeasilyappliedinsignalprocessingwithtoocomplexcomputation.Basedonthefourth-ordercumulantwith1-Dslicesandadaptivefilters,anefficientalgorithmisproposedtosolvetheproblemandisextendedfornonstationarystochasticprocesses.Inordertoachievetheaccurateparameterestimationofdirectsequencespreadspectrum(DSSS)signals,thefirststepusesthemodifiedfourth-ordercumulanttoreducethecomputingcomplexity.Whilethesecondstepemploysanadaptiverecursivesystemtoestimatethepowerspectruminthefrequencydomain.Inthecaseofinterceptedsignalswithoutlargeenoughdatasamples,theestimatorprovidesgoodperformanceinparameterestimationandwhiteGaussiannoisesuppression.Computersimulationsareincludedtocorroboratethetheoreticaldevelopmentwithdifferentsignal-to-noiseratioconditionsandrecursivecoefficients.

简介：DuringthecrystalgrownbyVBM,thesolid/liquidinterfaceconfigurationsgreatlyinfluencethequalityofas-growncrystals.Inthispaper,finiteelementmethod(FEM)wasusedtosimulatethegrowthprocessofCdZnTecrystal.Theeffectsofdifferentcruciblemovingratesandtemperaturegradientofadiabaticzoneoncrystalgrowthrateandsolid-liquidinterfaceonfigurationwerestudiedaswell.Simulationresultsshowthatwhencruciblemovesattherateofabout1mm/h,whichisnearlyequaltocrystalgrowthrate,nearlyflatsolid/liquidinterfaceandlittlevariationofaxialtemperaturegradientnearitcanbeattained,whicharewellconsistentwiththeresultsofexperiments.CdZnTecrystalwithlowdislocationdensitycanbebtainedbyemployingappropriatecruciblemovingrateduringthecrystalgrowthprocess.

简介：在HSV颜色空间的人的皮肤的特征广泛地基于内容在图象检索的区域被使用。因为它的价值为肤色有一个狭窄的范围，H作为基本识别参数被选择并且当照明紧张或皮肤表面的弯曲正在变化时，能保持稳定。有在HSV颜色空格的照明的变化的参数的规则被学习。当照明紧张被改变时，/2能使稳定的浸透和价值或皮肤表面(S+V)的平均数被变化，这第一被发现，并且(S+V)/2随着肤色变化，但是变化的趋势与H的相反。因此，(S+V)/H能被用作能提高HSV能力认出人的皮肤的一个新识别参数。CLC数字TN911.73

简介：Evaluationofqualityofsingingisanissuesubjectivelyrealizedbytheexperts.Thispaperpresentstheresultsoftheanalysisofthevibratoparameterinthesinging.Thewell-knownfactistheexistenceofvibratoofsufficientqualityinthevoicesofprofessionalsingers.Theauthorsfocushereonthechoralvoicestoassessthequalityoftheirsingingfromthepointofviewofthevibratoparameter.Themethodpresentedhereisdevelopedtoevaluatethevibratowhilesingingunderconditionsclosetotherealones.Thestudywascarriedoutontherecordingsofthemembersofanacademicchoir.Asaresultoftestsitwasfoundthatnotallsingerspresentthesamequalityofvibratointermsofdeviationofvibratoconfidence(STDCV).

简介：Anoveloptimizationalgorithmcalledstochasticfocusingsearch(SFS)forthereal-parameteroptimizationisproposed.Thenewalgorithmisaswarmintelligencealgorithm,whichisbasedonsimulatingtheactofhumanrandomizedsearching,andthehumansearchingbehaviors.Thealgorithm'sperformanceisstudiedusingachallengingsetoftypicallycomplexfunctionswithcomparisonofdifferentialevolution(DE)andthreemodifiedparticleswarmoptimization(PSO)algorithms,andthesimulationresultsshowthatSFSiscompetitivetosolvemostpartsofthebenchmarkproblemsandwillbecomeapromisingcandidateofsearchalgorithmsespeciallywhentheexistingalgorithmshavesomedifficultiesinsolvingcertainproblems.

简介：Analgorithmofhighlymaneuveringtargettrackingisproposedtosolvetheproblemoflargetrackingerrorcausedbystrongmaneuver.Inthisalgorithm,anewestimator,namedasmulti-parameterfusionSinger(MF-Singer)modelisderivedbasedontheSingermodelandthefuzzyreasoningmethodbyusingradialaccelerationandvelocityofthetarget,andappliedtotheproblemofmaneuveringtargettrackinginstrongmaneuveringenvironmentandoperatingenvironment.ThetrackingperformanceoftheMF-Singermodelisevaluatedandcomparedwithothermanueveringtrackingmodels.ItisshownthattheMF-Singermodeloutperformsthesealgorithmsinseveralexamples.

简介：ThispaperinvestigatesaMultiple-InputMultiple-Output(MIMO)schemecombiningTransmitAntennaSelectionandreceiveMaximal-RatioCombining(TAS/MRC)intime-varyingRayleighfadingchannels.Wefirstpresentnewclosed-formexpressionsforoptimalreceivedSignal-to-NoiseRatio(SNR),whichisexpressedinpolynomialform.Theseareusedtoanalyzeergodiccapacity,outageprobabilityandBitErrorRate(BER)ofTAS/MRCsystems.Numericalresultsarepresentedtovalidatethetheoreticalanalysis.

简介：

简介：UsingTime-VaryingAR(TVAR)modelandadaptivenotchfilterisanewmethodforthenon-stationaryjammersuppressioninDirectSequenceSpreadSpectrum(DSSS).TheperformanceofTVARmodelforInstantaneousFrequency(IF)estimationwillbeaffectedbysomefactorssuchasbasisfunctions.Focusingonthisproblem,theoptimalbasisfunctionofTVARmodelfortheIFestimationoftheLFMsignalisobtainedinthispaper.Besidesthedepthandwidthofnotching,thephasepropertiesofnotchfilteraffecttheSignal-to-Interferenceplus-NoiseRatio(SINR)ofcorrelationoutputtothenarrowbandjammersuppressioninDSSS,inresponsetotheproblemtheclosedsolutionofcorrelationoutputSINRimprovementhasbeenderivedwhenasinglefrequencyjammerpassesthroughdirectIIRnotchfilter,anditsperformancehasbeencomparedwiththoseoffivecoefficientFIRfilters.Later,anovelmethodforLFMjammersuppressionbasedonFourierbasisTVARmodelanddirectIIRnotchfilterisproposed.Thesimulationresultsshowtheeffectivenessoftheproposedmethod.

简介：Theproblemoftherobustfaultdetectionfilterdesignfortime-varyingdelaysswitchedsystemsisconsideredintheframeworkofmixedH_-/H_∞.Firstly,theweightedH_∞performanceindexisutilizedastherobustnessperformance,andtheH_-indexisusedasthesensitivityperformanceforobtainingtherobustfaultdetectionfilter.ThenanovelmultipleLyapunov-Krasovskiifunctionisproposedforderivingsufficientexistenceconditionsoftherobustfaultdetectionfilterbasedontheaveragedwelltimetechnique.Byintroducingslackmatrixvariable,thecouplingbetweentheLyapunovmatrixandsystemmatrixisremoved,andtheconservatismofresultsisreduced.Basedontherobustfaultdetectionfilter,residualisgeneratedandevaluatedfordetectingfaults.Inaddition,theresultsofthispaperaredependentontimedelays,andrepresentedintheformoflinearmatrixinequalities.Finally,thesimulationexampleverifiestheeffectivenessoftheproposedmethod.

简介：Thetime-frequencyanalysisofthesignalacquiredbyasingleground-basedmicrophoneshowsatwo-dimensionalinterferencepatterninthetime-frequencyplane,whichiscausedbythetimedelayofthereceivedsignalemittedfromalowflyingaircraftviathedirectpathandtheground-re-flectedpath.Amodelisdevelopedforestimatingthemotionparametersofanaircraftflyingalongastraightlineataconstantheightandwithaconstantspeed.MonteCarlosimulationresultsandex-perimentalresultsarepresentedtovalidatethemodel,andanerroranalysisofthemodelispresentedtoverifytheeffectivenessoftheestimationschemeadvocated.