简介:Thispaperanalyzestherelationshipbetweencapacityanddynamicsinrecurrentcorrelationneuralnetwork,andpointsoutthatinsomeconditionstherecurrentcorrelationneuralnetworkhashighmemorycapacity.Thenthispaperpresentsseveralmethodsforimprovingtheperformance.
简介:Astheevolutionofmobiletechnology,mobiledeviceshavebecomeanessentialtoolinpeople’sdailylife.Moreover,withtherapidgrowthofInternetandmobilenetworks,peoplecaneasilyaccessvariousservicesprovidedbymobileplatforms.Manyservicescanbeexecutedonthemobiledeviceswithvariousmobileapplicationslaunchedtomobileplatforms.Peoplecanchoosewhattheyliketoinstallintheirmobiledevicesandhencemaketheirlifemoreconvenient,entertaining,andproductive.However,therearetoomanymobileapplicationsforuserstochoose.Thegoalofthisresearchistoproposeamethodologywhichcanrecommendtop-Nlistsformobileapplications.Acommentcorrelationmatrixisproposed.Furthermore,arecommendationalgorithmformobileapplicationsbasedonusercommentsandkeyattributesisbuilt.Withtheproposedmethod,itoutperformsGoogleplayandisclosertouserrealfeelings.
简介:Basedonaclassofbipolarsequenceswithtwo-valuesautocorrelationfunctions,anewfamilyofbipolarsequencesisconstructedanditscorrelationspectrumiscalculated.ItisshownthatthenewfamilyisoptimalwithrespecttoWelch'sboundandisdifferentfromthesmallsetofKasamisequences,whilebothofthemhavethesamecorrelationproperties.
简介:Allopticalnetworkbasedonwavelengthdivisionmultiplexingtransmissionsystemwithopticalcrossconnect(OXC)isanessentialapproachforopticalcommumications.CrosstalkintroducedbyOXC(speciallylargescaleone)isakeylimitingfactorforitscapacity.OpticalsignalpassingthroughatypicalOXCisanalyzedinthispaper,followedbydescriptionofthegenerationandeffectofintrabandcrosstalk.ThepowerpenaltiesinducedbyintrabandcrosstalkversusthenumberofmultiplexedwavelengthsMandthenumberofinputfibersNhavebeengivenbynumericalsimulations.TheresultsshowthatthecoherentcrosstalkisthemostcriticallimitationonOXCanddependsmorecloselyonthenumberofmultiplexedwavelengthsMthanthenumberofinputfibersN.Crosstalkissuppressedbydoublyfiltering,fixingoptimumdecision-thresholdandappropriatelychoosingthenumberofmultiplexedwavelengthsM.
简介:信息熔化是在多模式的生物测定的系统的关键步。特征级的熔化是比由于原来的特征集合关于生物测定的数据包含更富有的信息的事实的分数级、决定级的方法更有效的。在这份报纸,我们在场当时,为特征级的多模式的生物测定的信息熔化的概括正规判别式设计(MGCDP)方法,它最大化intra班的关联展示的multiset最小化在班之间的关联。另外,连续MGCDP(S-MGCDP)和策略也是的平行MGCDP(P-MGCDP)求婚了,它能多于二种生物测定的信息熔化,以便完成更好的鉴定效果。实验在MGCDP方法超过的各种各样的生物测定的数据库表演表现了另外的最先进的特征级的信息熔化途径。
简介:Alargeclassoflinearstructuralfunctions(LSF)satisfyingtheconditionofcorrelationalimmunityoforderoneareconstructedbystudyingthelinearstructuralBooleanfunctions.Withthesenewfoundedfunctions,theknownenumerationboundsofcorrelation-immunefunctionsoforderonearegreatlyimproved.Infact,thebest,uptonow,lowerboundisfound.
简介:Inthispaper,opticalcross-connection(OXC)inducedcrosstalkhasbeencarefullyanalyzedformultiwavelengthall-opticalnetworks.Formulaearederivedforcalculatingthecrosstalkpowerofhomowavelengthcrosstalkandthetotalcrosstalkatthereceiverend.TheresultsshowthattheopticalswitchesinducedcrosstalkdominatesoverothercrosstalkcomponentsofOXC,andtheaccumulatedhomowavelengthcrosstalkincreasesalmostlinearlywiththeincreasingoftheOXCnumber.Atthereceiverend,theheterowavelengthcrosstalkinducedbythereceiveropticalfilterhasthesameorderasthatofhomowavelengthcrosstalkofOXC.Theresultsofdifferentopticalcomponentsmodelarealsodiscussed.
简介:Thispaperstudiesadetectionmethodoftargetsofhighresolutionradaroperatingatthebandofmillimeter-wave(32-38GHz)underthebackgroundoftheclutters,andproposesanewnonparametricdetectionmethod,whichnotonlydoeslesscomputation,butalsoisabletodetectmultipleextendedtargetsradiallydistributedalongdistance"corridor",basedontheposition(range)correlationinformationofone-dimensionalrangeimages(orcalledrangeprofiles)ofhighresolutionradartargets.Theexperimentalresults,ontherealechodataoftankilluminatedbythemillimeter-wavesteppedfrequencyhighresolutionradar,havecertifiedthatsuchamethodpresentedinthispaperisaveryeffectivedetectionmethodformultipleextendedtargets.
简介:Thecharacteristicsoflow-frequencyelectricalnoise,voltage-current(V-I)andelectricalderivationfor980nmInGaAsP/InGaAs/GaAshighpowerdoublequantumwelllasers(DQWLs)aremeasuredunderdifferentconditions.Thecorrelationofthelow-frequencyelectricalnoisewithsurfacenon-radiativecurrentofdevicesisdiscussed.Theresultsindicatethelow-frequencyelectricalnoiseof980nmDQWLswithhighpowerismainly1/fnoiseandhasgoodrelationwiththedevicesurfacecurrentatlowinjection.
简介:Anewmethodofcalculatingtheradaicrosssection(RCS)forwing-bodyblendedtargetsispresentedandverified.Themethodutilizesacomputerprogramformodelingtargets’geometryintermsofsmallpieces.Thecalculationisbasedonphysicalopticsapproximation.Examplesaregiventoshowthevalidityofthemethod.
简介:Thispaperstudiesthedevelopmentonthefirstorderseacluttercrosssectionforbistatichighfrequencysurfacewaveradar(HFSWR).Basedonthereceivedfirstorderelectricfieldexpression,aclosed-formofcrosssectionsisderivedtoaccountforthecaseofreceivingantennaarraybeingmountedontheshipborneplatform.Theuniformlinearmotionandswaymotioncomponentsareassumedtoberesponsiblefortheobserveddifferencesincomparisonwiththebistaticfixedantennacase.Correspondingly,simulationsareconductedtostudytheseaclutterspectralcharacteristicsforthesetwocasesversusdifferentsystemparametersandseastateconditions.ItisshownnumericallythattheforwardmotioncomponentwillspreadtheBragglinesseverelyandtheinfluencetriggeredbytheswaymotioncanbeexplainedastheBesselfunctionmodulationoftheordinaryseaclutterspectra.TheobtainedresultshaveimportantimplicationsintheapplicationofshipborneHFSWRtechnologytooceanremotesensingandtargetdetection.
简介:Timeresolutionofmultipathdelayprofilesmeasuredbyusingautocorrelationofpseudonoise(PN)codesequenceisgenerallylimitecbythechiprateofthePNcodesequence.Inthispaper,weproposeasimplemethodtoimprovethetimeresolutionofdelayprofilesmeasuredbythePNcorrelationmethod.Effectivenessofthismethodisdemonstratedbyindoorwirelesspropagationexperiments.
简介:Thispaperutilizesthecross-layerarchitecturetoimplementadaptiveresourceallocationinOrthogonalFrequencyDivisionMultipleAccess(OFDMA)basedonthebroadbandwirelessaccesssystem.Accordingtothecross-layerarchitecture,theinformationinlinklayerisusedforadaptiveresourceallocationinOFMDA.Anewcross-layeradaptiveresourceallocationalgorithmisdevelopedwhichcanguaranteetheuserstobeinminimumaveragewaitingtimeinlink-layerandgetthebetterspectrumutilization.Numericalresultsshowthatourschemeisappealingandcangetabouthalfofaveragewaitingtimelessand0.5bps/HzspectrumutilizationmorethantheschemeinIEEE802.16a.
简介:EmployingafiberFabry-Perot(FFP)interferometerhasbeenconsideredasatrianglenotchfiltertodemodulatethewavelengthoffiberBragggrating(FBG)sensor.Thesingleparameterofstrainhasbeendemodulated,andthecross-sensitivityinfluenceoftemperaturehasbeeneliminated.Theprincipleofthismethodissimpleandeasytobeimplemented,andhasbeenusedtodesigna30tfibergratingweightbridgesuccessfully.Themaximaltemperaturedrifterroroftheweightbridgeis4με,whichmeansthatthefullscaleerroris8‰.Theresultrevealsthattheaccuracyishighenoughtobeusedinmeasurement.
简介:Themodeswitchingbetweenspatialmultiplexing(SM)andspace-timeblockcode(STBC)diversityisinvestigatedforthemultiple-inputmultiple-output(MIMO)automaticrepeatrequest(ARQ)system.Fiveimportantpracticalfactorsareconsideredintheproposedswitchingscheme:transmitcorrelation,ARQtechnique,packetlossprobability(PLP)constraint,discreteratetransmission(DRT)andchannelcoding.Underthespatiallycorrelatedchannel,thedistributionsofthepostsignal-to-interference-plusnoiseratio(SINR)fortheSMmodeandtheSTBCmodeareobtainedbyusingGammaapproximations.Thenthispaperderivestheclosed-formexpressionsofthePLPandthethroughputfordifferentmodeswhentheARQtechniqueisemployed,basedonwhichthemodeswitchingalgorithmisproposedtoimprovethespectralefficency.Inthesimulation,thecorrectionoftheexpressionsisfirstverified.Then,thesignificantgainobservedbytheproposedalgorithmispresented.Sincetheswitchingpointisthekeyparametertoimplementthemodeswitching,thispaperalsoshowshowtheswitchingpointisaffectedbythepracticalfactorsconsidered.
简介:Usingcomputer-controlledliquidcrystaldisplay(LCD)asanimageprocessorandaCCDcameraasadetector,phase-onlycorrelationmeasurementisperformedwiththeaidofjointtransformcorrelationmethod(JTC).Thiscomputer-controlledLCD-CCDimageprocessingsystemmaybeapowerfultoolfordefectdetection,positioncontrolandpatternrecognition.Itenablesnewpossibilitiesinanalogreal-timeimageprocessing.Thisisofgreatinterestinmicroelectronicmanufacturingtodayandinthefuture.