简介：Orthogonalfrequencydivisionmultipleaccess(OFDMA)isapopularandwidelyacceptedmultipleaccesstechniquetoprovidehighdatarateservicesinamobileenvironmentintheareaofwirelesscommunications.OFDMAcanprovidebetterflexibilityinallocatingtheradiospectrabyutilizingsubcarrierallocations,scheduling,andenergycontroltoobtainmulti-dimensiondiversitygains.Duetoitsresourceallocationflexibility,OFDMAhasbeenwidelyusedasagreenairinterfacetechnologyfortheemergingbroadbandwirelessaccessnetworks.ThispaperextensivelyaddressestheintegrationofgreenOFDMAtothefutureairinterfacetechnologies,forinstance:two-tiercellular,multiradioaccesstechnologies(RATs),FemtoCell,andrelaynetworks.ThemainfocusofthepaperistoreviewandanalyzethecurrentOFDMAtechniquestoaddressthegreenresourceallocationinmultiuserdiversity,wherethecriticalconstraintsarethecomputationalcomplexity,energyefficiency,andthesub-channelassignment.ThefuturetrendofOFDMAbasednetworkswillaimtomaximizetheenergyefficiencyoftheexclusivechannelassignmentthroughajointsub-channelandpowerallocationtoaccommodatehighdatatrafficnetworksspeciallytherelaybased5Gcellularnetworks.

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简介：Twosignaturesystemsbasedonsmartcardsandfingerprintfeaturesareproposed.Inonesignaturesystem,thecryptographickeyisstoredinthesmartcardandisonlyaccessiblewhenthesigner'sextractedfingerprintfeaturesmatchhisstoredtemplate.Toresistbeingtamperedonpublicchannel,theuser'smessageandthesignedmessageareencryptedbythesigner'spublickeyandtheuser'spublickey,respectively.Intheothersignaturesystem,thekeysaregeneratedbycombiningthesigner'sfingerprintfeatures,checkbits,andarememberablekey,andtherearenomatchingprocessandkeysstoredonthesmartcard.Additionally,thereisgenerallymorethanonepublickeyinthissystem,thatis,thereexistsomepseudopublickeysexceptarealone.

简介：ForanSOI-FPGA(silicon-on-insulatorfieldprogrammablegatearrays)(VS1000)fabricatedwith0.5mSOI-CMOS(silicon-on-insulatorcomplementary-metal-oxide-semiconductor)process,acompleteintegratedplatformofFPGAcomputer-aideddesign(CAD)toolset(VDK)isdeveloped,whichcanconverttheVerilogHDL(hardwaredescriptionlanguage)descriptionintoabitstreamandfinallydownloaditintoanFPGA.ExperimentsandtestingverifythatthisFPGACADworkswellandefficiently.

简介：AkindoffiberBragggratingpressuresensorbasedoncorrugateddiaphragmisproposed.TherelationshipbetweenthecentralwavelengthofreflectivewaveofFBGandpressureisgiven,andtheexpressionofthepressuresensitivitycoefficientisalsogiven.Withintherangefromresultsagreewiththetheoreticalanalysis.Itisindicatedthattheexpectedpressuresensitivityofthesensorcanbeobtainedbyoptimizingthesizeandmechanicalparametersofthecorrugateddiaphragm.

简介：Informationfusioninbiometricsystems,eithermultimodalorintramodalfusion,usuallyprovidesanimprovementinrecognitionperformance.Thispaperpresentsanimprovedscore-levelfusionschemecalledboostedscorefusion.Theproposedframeworkisatwo-stagedesignwhereanexistingfusionalgorithmisadoptedatthefirststage.Atthesecondstage,theweightsobtainedbytheAdaBoostalgorithmareutilizedtoboosttheperformanceofthepreviouslyfusedresults.Theexperimentalresultsdemonstratethattheperformanceofseveralscore-levelfusionmethodscanbeimprovedbyusingthepresentedmethod.

简介：当它在察觉到的fiberBragg栅栏(FBG)被使用时，波长部门multiplex有明显的优点因为各种各样的数量的同时的测量，而是传感器的数字被小橇和解调器的带宽通常限制。相同纤维Bragggrating为火报警系统被介绍，收集相同FBGsensors的信号的方法被描述。实验结果显示出那，相同FBG察觉到。传感器的数字极大地在一纤维增加联合了，精确能被保证为火报警系统满足要求。

简介：ThewavelengthassignmentwithmultiplemulticastrequestsinfixedroutingWDMnetworkisstudied.Anewmulticastdynamicwavelengthassignmentalgorithmispresentedbasedonmatchingdegree.First,thewavelengthmatchingdegreebetweenavailablewavelengthsandmulticastroutingtreesisintroducedintothealgorithm.Then,thewavelengthassignmentistranslatedintothemaximumweightmatchinginbipartitegraph,andthismatchingproblemissolvedbyusinganextendedKuhn-Munkresalgorithm.Thesimulationresultsprovethattheoveralloptimalwavelengthassignmentschemeisobtainedinpolynomialtime.Atthesametime,theproposedalgorithmcanreducetheconnectingblockingprobabilityandimprovethesystemresourceutilization.

简介：Asignalwaveformrecoverymethodbasedonthecoprimearrayisinvestigatedtoextractthewaveformofthedesiredsignalfromspatialinterferencesinnarrowbandscenarios.Thedirectionofarrivals(DOAs)ofthedesiredsignalandinterferencesignalsareestimatedwiththecompressivesensingapproachbasedonanglegrids,andthesignalpowertogetherwiththenoisepowerareestimated.Thereafter,amodifiedsteepestdescent(SD)methodisderivedtorecoverthewaveformofthedesiredsignalandinterferencesutilizingtheestimatedpoweranddirections.Therecoveredwaveformofthedesiredsignalistheoutputoftheproposedmethod.Thesituationinwhichthesignalsarenotonthepredefinedanglegridsisalsoconsidered.TheDOAsestimatedpredefinedanglegridsisalsoconsidered.TheDOAsestimatedlikelihood(ML)angleestimation.Comparedtotheexistingbeamformingmethodsonco-primearray,theproposedmethodcanobtainthewaveformofthedesiredsignal.Simulationresultsdemonstratethattheproposedmethodcanachievegoodperformanceinsignalwaveformrecoveryandoutputsignaltonoiseratio.

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简介：Aninformationhidingalgorithmisproposed,whichhidesinformationbyembeddingsecretdataintothepaletteofbitmapresourcesofportableexecutable(PE)files.Thisalgorithmhashighersecuritythansometraditionalonesbecauseofintegratingsecretdataandbitmapresourcestogether.ThroughanalyzingtheprincipleofbitmapresourcesparsinginanoperatingsystemandthelayerofresourcedatainPEfiles,asafeandusefulsolutionispresentedtosolvetwoproblemsthatbitmapresourcesareincorrectlyanalyzedandotherresourcesdataareconfusedintheprocessofdataembedding.Thefeasibilityandeffectivenessoftheproposedalgorithmareconfirmedthroughcomputerexperiments.

简介：Thispaperfocusesontheproblemofautomaticimageclassification(AIC)byproposingaframeworkbasedonlatentsemanticanalysis(LSA)andimageregionpairs.Thenovelframeworkemploysrelativespatialarrangementsforregionpairsastheprimaryfeaturetocapturesemantics.Thesignificanceofthispaperistwofold.Firstly,tothebestourknowledge,thisisthefirststudyoftheinfluenceofregionpairsaswellastheirrelativespatialinformationinlatentsemanticanalysisasappliedtoautomaticimageclassification.Secondly,ourproposedmethodforusingtherelativespatialinformationofregionpairsshowgreatpromiseinimprovingimagesemanticclassificationcomparedwiththeclassicallatentsemanticanalysismethodand2Dstringrepresentationalgorithm.

简介：ThislettergivesarandomconstructionforLowDensityParityCheck(LDPC)codes,whichusesaniterativealgorithmtoavoidshortcyclesintheTannergraph.TheconstructionmethodhasgreatflexiblechoiceinLDPCcode'sparametersincludingcodelength,coderate,theleastgirthofthegraph,theweightofcolumnandrowintheparitycheckmatrix.ThemethodcanbeappliedtotheirregularLDPCcodesandstrictregularLDPCcodes.Systemiccodeshavemanyapplicationsindigitalcommunication,sothisletterproposesaconstructionofthegeneratormatrixofsystemicLDPCcodesfromtheparitycheckmatrix.Simulationsshowthatthemethodperformswellwithiterativedecoding.

简介：改进了并置的超级正向纠错(super-FEC)的三个新奇计划代码在长拖光传输系统的发展趋势和存在FEC代码的缺点以后被建议被分析了。芦苇贤明之人(RS)+Bose-Chaudhuri-Hocguenghem(BCH)的性能模拟内部外部的连续并置的代码被实现，编码/译码并置平行的代码的概念被介绍。而且，模拟为RS结果(255，239)+RS(255，239)代码和theRS(255，239)+RS(255，223)二连续并置的代码是有这的一个优异编码方案的代码表演与经典RS相比作为更好的纠错，中等冗余性和容易的实现有利(255，239)代码和其它代码，并且他们的信号噪声比获得是分别地多于RS的2～3dB(255，239)在1x10~的误码率的代码(-13)。最后，新奇连续并置的代码的帧结构被安排在设计它的硬件打一个坚挺的基础。

简介：PresentedisaschemeofanembeddedvideoremotemonitoringsystembasedonTMS320DM642.UsingDM642asthedataprocessingcore,theremotemonitoringsystemiscomposedofvideoacquisitionmodule,videoprocessingmoduleandcommunicationmodule,whichgivesanimplementationofclass/minidrivermoduleinDSP/BIOSintegrateddevelopingenvironmentandalsoacommontaskmoduleinapplicationlayerisachieved.Thesystemrealizestheentirefunctionsoftheanalogvideosignalacquisition,H.264videocodingandInternettransmission.Itprovidesthegeneralconnectionforthefuturedevelopmentandhasgoodflexibilityandextendibility.Thesystemusesamodulardesignandoveralldevelopmentofprogrammingmethodstoimprovetheefficiencyofsystemdevelopment.

简介：Recently,ithasbeenseenthattheensembleclassifierisaneffectivewaytoenhancethepredictionperformance.However,itusuallysuffersfromtheproblemofhowtoconstructanappropriateclassifierbasedonasetofcomplexdata,forexample,thedatawithmanydimensionsorhierarchicalattributes.Thisstudyproposesamethodtoconstructeanensembleclassifierbasedonthekeyattributes.Inadditiontoitshigh-performanceonprecisionsharedbycommonensembleclassifiers,thecalculationresultsarehighlyintelligibleandthuseasyforunderstanding.Furthermore,theexperimentalresultsbasedontherealdatacollectedfromChinaMobileshowthatthekey-attributes-basedensembleclassifierhasthegoodperformanceonbothoftheclassifierconstructionandthecustomerchurnprediction.

简介：Thispaperpresentsahumanactionrecognitionmethod.Itanalyzesthespatio-temporalgridsalongthedensetrajectoriesandgeneratesthehistogramoforientedgradients(HOG)andhistogramofopticalflow(HOF)todescribetheappearanceandmotionofthehumanobject.Then,HOGcombinedwithHOFisconvertedtobag-of-words(BoWs)bythevocabularytree.Finally,itappliesrandomforesttorecognizethetypeofhumanaction.Intheexperiments,KTHdatabaseandURADLdatabasearetestedfortheperformanceevaluation.Comparingwiththeotherapproaches,weshowthatourapproachhasabetterperformancefortheactionvideoswithhighinter-classandlowinter-classvariabilities.IndexTermsBag-of-words(BoWs),densetrajectories,histogramofopticalflow(HOF),histogramoforientedgradient(HOG),randomforest,vocabularytree.

简介：ThepaperpresentsanalgorithmofautomatictargetdetectioninSyntheticApertureRadar(SAR)imagesbasedonMaximumAPosteriori(MAP).Thealgorithmisdividedintothreesteps.First,itemploysGaussianmixturedistributiontoapproximateandestimatemulti-modalhistogramofSARimage.Then,basedontheprincipleofMAP,whenaprioriprobabilityisbothunknownandlearnedrespectively,thesamplepixelsareclassifiedintodifferentclassesc={target,shadow,background}.Last,itcomparestheresultsoftwodifferenttargetdetections.Simulationresultspreferablyindicatethatthepresentedalgorithmisfastandrobust,withthelearnedaprioriprobability,anapproachtotargetdetectionisreliableandpromising.

简介：最高的接触n类型有低操作电压的器官的地效果晶体管被采用Ta2O5/PMMA作为双绝缘体和PTCDI-C12作为半导体活跃的层。Ta2O5层被使用简单节俭的阳极化技术准备，PMMA层被使用纺纱涂层方法准备。与有单个Ta2O5绝缘体，有两倍绝缘体的设备显示出显然更好的电的性能。它有0.063厘米2/Vs,的地效果电子活动性1.7×1的开／关比率04和2.3V的阀值电压。

简介：SupportVectorMachine(SVM)isapowerfulmethodologyforsolvingproblemsinnon-linearclassification,functionestimationanddensityestimation,whichhasalsoledtomanyotherrecentdevelopmentsinkernelbasedmethodsingeneral.Thispaperpresentsahighaccuracyandfault-tolerantSVMforthemobilegeo-locationproblem,whichisanimportantcomponentofpervasivecomputing.Simulationresultsshowitsbasiclocationperformance,andillustrateimpactsofthenumberoftrainingsamplesandtrainingareaontestlocationerror.