简介：在一个伪同步的代码部门多重存取(QS-CDMA)系统，在起源附近的关联函数影响系统性能和奇怪的函数象平函数一样重要。三种零个关联地区(ZCZ)序列被用来分析并且比较关联功能。调音的二进制阶段移动(BPSK)有传播在添加剂白人Gaussian噪音(AWGN)上编码隧道的三种QS序列的QS-CDMA系统的模拟证明这些序列是伪直角的，他们因此对QS-CDMA合适系统。在系统表演和顺序的零个关联地区之间的关联也被证明。

简介：ExistingEthernetPassiveOpticalNetwork(EPON)DynamicBandwidthAllocation(DBA)algorithmssufferfromthedisadvantageofidletimeloss,whichlowertheupstreambandwidthutili-zation.Thisletterproposesanimprovedupstreamtransmissionschemewithidle-timeeliminatingmechanism.Theoreticalanalysisandnumericalcalculationprovethattheimprovedschemecanef-fectivelyeliminatetheidletimeandenhancetheefficiencyofupstreamlinkutilization.Simulationresultshaveshownthatthebandwidthutilizationcanberaisedupto15%inheavy-loadscenarioswhilethetimedelayperformanceofAssuredForwarding(AF)andBestEffort(BE)servicesareimprovedsimultaneously.

简介：IntheH.263videocodecrelatedsystems,motionestimationandDiscreteCosineTransform(DCT)havethemostcomputationalrequirements.Inordertoreducecomplexityoftheencodertodedicatemoreresourcestootherfunctions,accordingtothestudyofexistingmethods,anImprovedAllZeroBlockFinding(IAZBF)methodbasedonthestatisticcharacteristicsofDCTcoefficientsisproposed.Comparedwithexistingmethods,IAZBFimprovesthedetectingefficiencybyabout50%withoutimportingtoomuchextracomputationrequirement.Beingcomputedwithadditionsandshiftsinsteadofcomplicatedmultiplications,IAZBFisoflowcomputationcomplexity,especiallyforlow-endprocessors.Inaddition,IAZBFupholdspicturefidelityandremainscompatiblewiththeH.263bitstreamstandard.

简介：ThispaperpresentsanRFreceiverofzero-IntermediateFrequency(IF)architectureforCognitiveRadio(CR)communicationsystems.Zero-IFarchitecturereducetheimagerejectfilterandIFfilter,soitisexcellentinlowcost,compactvolume,andlowpowerdissipation.Thereceiveremploysthreedigitalattenuatorandahighgain,highlinearitylownoiseamplifiertoachievewidedynamicrangeof70dBandhighreceivingsensitivityof-81dBm.AfullybalancedI/QdemodulatorandadifferentialLocalOscillator(LO)chipsareusedtominimizethenegativeeffectscausedbysecond-orderdistortionandLOleakage.Inordertoselectan8MHz-channelfrom14continuousoneslocatedinUHFband(694-806MHz)accurately,approachofchannelselectivitycircuitsisproposed.TheRFreceiverhasbeendesigned,fabricated,andtest.Themeasuredresultshowsthatthenoisefigureis3.4dB,andtheerrorvectormagnitudeis7.5%whentheinputpoweris-81dBm.

简介：Thezero-voltagequasi-resonantboostswitchingDC-DCconverterhasbeeninves-tigatedbyusingthetimeaveragingequivalentcircuitapproachofperiodicallyswitchinglinearnetworks.TheDCsteadystateandACsmallsignalcharacteristicsoftheconverterarealsogiven.

简介：Aservocontrolsystemispronetolowspeedandunsteadinessduringvery-low-frequencyfollow-up.Adesignmethodoffeedforwardcontrolbasedonintelligentcontrollerisputfoward.Simulationandtestresultsshowthatthemethodhasexcellentcontrolcharacteristicsandstrongrobustness,whichmeetstheservocontrolneedswithvery-lowfrequency.

简介：Becauseofthezerodispersionwavelength(ZDWL)randomfluctuations,thegainandnoisefiguresdeteriorateinopticalparametricamplifiersbasedonhighlynonlinearfibers(HNLFs).ThedetrimentalroleofZDWLfluctuationsonthegainandnoiseperformanceindual-pumpfiberopticalparametricamplifiers(FOPAs)ispresented.Numericalinvestigationsofnoisefigure(NF)fordifferentfiberswithrandomfluctuationareanalyzed.Thenoisefiguresfordifferentfibersarevaryingeveniftherandomfluctuationissmall.ThroughchoosingHNLFswithlowZDWLfluctuationandlargenonlinearcoefficient,high-gainandlow-noiseperformancecanbeobtained.

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：Anon-intrusivedesignformonitoringeverydayactivitiesofanelderlypersonispresented.Theproposedsystemisintendedtobeusedinthebedroom,allowingtheelderstostayathomeinasafeenvironment.Therequiredhardwaredesignissimpleinstructureandcosteffective.ThesensordesignisimplementedbyusingcapacitivesensorsandanArduinomicrocontrollerunit.Andarealtimegraphicaluserinterfaceisimplementedtomonitortheelderlyperson.Theperformanceanalysisshowsthatthesensordesignisabletodifferentiatebetweenahumanbodyandahousepet.

简介：Thefeaturesofnon-voicesignalsonpubliccommunicationnetsareanalyzedandanapproachtodistinguishsuchsignalsisintroducedinthispaper.Itisthefirsttimeforthesystemtomeetthreekeytargets:large-scale,highrecognitionrateandlowfalsealarmatthesametime.

简介：Assemblingindividuallinephasefilterstoformamulti-channelfilterbankallowsthesynthesisfiltertobesimilartocorrespondinganalysisfilters,andthedesigncalculationcanbesimple.Theappropriaterelationsbetweensynthesisfiltersandanalysisfilterseliminatemostaliasingresultingfromdecimationinnon-uniformmaximallydecimatingfilterbanks,andLSalgorithmandRemezalgorithmareusedtooptimizethecompositecharacter.ThisdesignmethodcanachieveapproximatePerfect-Reconstruction.Anexampleisgiveninwhichthegeneralparameterfilterswithapproximatelinephaseareusedasunitsofafilterbank.

简介：Thecharacteristicsoflow-frequencyelectricalnoise,voltage-current(V-I)andelectricalderivationfor980nmInGaAsP/InGaAs/GaAshighpowerdoublequantumwelllasers(DQWLs)aremeasuredunderdifferentconditions.Thecorrelationofthelow-frequencyelectricalnoisewithsurfacenon-radiativecurrentofdevicesisdiscussed.Theresultsindicatethelow-frequencyelectricalnoiseof980nmDQWLswithhighpowerismainly1/fnoiseandhasgoodrelationwiththedevicesurfacecurrentatlowinjection.

简介：适应调整并且(AMC)编码提供灵活性匹配调整和编码计划(MCS)加用户的噪音比率(SINR)发信号到干扰。为了减少传播，驱动并且维持传播质量，力量控制通常与AMC被相结合。当力量控制的目标SINR被修理时，为AMC(NPGA)算法的因此非合作的力量控制游戏被建议根据MCS适应动态目标SINR变化。在NPGA，我们经由用途提出系统传播效率，在实用程序函数基于调整被构造并且与非合作的游戏理论编码效率的地方。NPGA能满足supermodular比赛的条件，这理论上被表明，并且它的答案是最佳的。模拟结果证明NPGA能与低传播力量，和NPGA的集中性能改进系统传播效率和信号质量与几何编程算法相比是更快有效性的。

简介：Byaccuratelymeasuringthedisplacementbetweentherollersurfaceandtheopticalfiberproberelativetoanullposition,wecantesttherollerwear.Thewholetestingmethodandsystemwereintroduced.Eachpartofthetestingsystemwasillustrated.Andalsoanovelfiber-opticsensorwiththreeprobesinequaltransversespaceisadopted.Usingthissensor,theeffectsoffluctuationsinthelightsource,reflectivitychangingoftargetsurfaceandtheintensitylossesinthefiberlinesareautomaticallycompensated.Thismethodofferssuchadvantagesasnon-contact,noelectromagneticinterference,simplicity,lowcost,highsensitivity,goodaccuracyandstability.

简介：EnergyisthedeterminantfactorforthesurvivalofMobileSensorNetworks(MSN).Basedontheanalysisoftheenergydistributioninthispaper,atwo-phaserelocationalgorithmisproposedbasedonthebalancebetweentheenergyprovisionandenergyconsumptiondistribution.Ourmainobjectivesaretomaximizethecoveragepercentageandtominimizethetotaldistanceofnodemovements.Thisalgorithmisdesignedtomeettherequirementofnon-uniformdistributionnetworkapplications,toextendthelifetimeofMSNandtosimplifythedesignoftheroutingprotocol.Inad-dition,testresultsshowthefeasibilityofourproposedrelocationalgorithm.

简介：声音变换(VC)基于Gaussian混合模型(GMM)是变换来源光谱指向光谱的最经典、普通的方法。然而，这个方法对敏感因为它的frame-by-frame变换在恰当上。有非否定的矩阵因式分解(NMF)的VC在这份报纸被介绍，它能阻止光谱由调整基础向量(字典)的尺寸在恰当上。以便认识到更好的非线性的印射，核NMF(KNMF)被采用完成印射的光谱。另外，增加变换的精确性，与GMM(GKNMF)相结合的KNMF也被介绍进VC。最后，KNMF，GKNMF，GMM，主要部件回归(PCR)，与GMM(GPCR)相结合的PCR，部分最不方形的回归(PLSR)，变弯的NMF基于关联的频率(NMF-CFW)和深神经的网络(DNN)方法与对方相比。建议GKNMF在客观评估和主观评估得到更好的性能。

简介：Lowpowerconsumptionisamajorissueinnowadayselectronicssystems.ThistrendispushedbythedevelopmentofdatacenterrelatedtocloudservicesandsoontotheInternetofThings(IoT)deployment.Memoriesareoneofthemajorcontributorstopowerconsumption.However,thedevelopmentofemergingmemorytechnologiespavesthewaytolow-powerdesign,throughthepartialreplacementofthedynamicrandomaccessmemory(DRAM)withthenon-volatilestand-alonememoryinserversorwiththeembeddedordistributedemergingnon-volatilememoryinIoTobjects.Inthelattercase,non-volatileflip-flops(NVFFs)seemapromisingcandidatetoreplacetheretentionlatch.Indeed,IoTobjectspresentlongsleeptimeandNVFFsoffertosavedatainregisterswithzeropowerwhentheapplicationisidle.ThispapergivesanoverviewofNVFFarchitectureflavorsforvariousemergingmemorytechnologies.

简介：Amodifiednon-coherentsequentialdetectiondecisionlogicbasedoncontinuousaccumulationtoachievefastPNcodeacquisitionisproposed.Tosimplifythedesignandanalysis,theequivalentrelationshipbetweenthelikelihoodratioofthecurrentsampleandthatofalltheprevioussamplesisdeduced.Theschemeisprovedtobeanoptimumsequentialdetectionundercertainassumptions.Becausetheaveragesamplenumber(ASN)cannotbecalculatedthroughthemethodsappliedtotheconventionalsequentialdetection,analgorithmisalsoprovided,whichcanestimateboththeprobabilitydensityfunction(pdf)andtheupperthresholeofASN.Thedesiredprobabilitiesoffalsealarmanddetection,aswellasfasterPNcodeacquisitioncomparedtotheconventionalsequentialdetectioncanbeachievedbyemployingthisstructure.Inaddition,Rayeigh-fadedreceptioncaseisalsotakenintoconsideration.Performancesoftheproposedschemesareobtained,whichsuggestthattheproposednon-coherentsequentialdetectionismoredesirable.

简介：根据在噪音环境的语音识别系统的识别率的衰落，一改善感性地不一致光谱压缩特征抽取算法在这份报纸被提出。这个方法能认识到讲话信号的有效压缩并且做训练和识别环境更多的匹配，因此识别率能在噪音环境被改进。由在聪明的轮椅站台上试验，结果证明算法罐头有效地提高语音识别的坚韧性，并且在噪音环境保证识别率。

简介：Traditionaldigitalprocessingapproachesarebasedonsemiconductortransistors,whichsufferfromhighpowerconsumption,aggravatingwithtechnologynodescaling.Tosolvedefinitivelythisproblem,anumberofemergingnon-volatilenanodevicesareunderintenseinvestigations.Meanwhile,novelcomputingcircuitsareinventedtodigthefullpotentialofthenanodevices.Thecombinationofnon-volatilenanodeviceswithsuitablecomputingparadigmshavemanymeritscomparedwiththecomplementarymetal-oxide-semiconductortransistor(CMOS)technologybasedstructures,suchaszerostandbypower,ultra-highdensity,non-volatility,andacceptableaccessspeed.Inthispaper,weoverviewandcomparethecomputingparadigmsbasedontheemergingnanodevicestowardsultra-lowdissipation.