简介：这篇文章基于新组限制建议改进概括方面脑叶canceller(GSC)接收装置结构，它是合适的消除多重存取的干扰(MAI)，在直接顺序的代码部门的内部标志的干扰(ISI)多重存取(DS/CDMA)downlink多用户系统。新组限制被推出构造组窗帘适应多用户察觉者。分析显示在新限制下面的改进GSC不仅保留压制ISI并且取消从成功的有用信息为需要的用户咬了的MAI，而且罐头摘录的性质。模拟证明改进GSC过滤器能高效地取消MAI无线隧道长度是否短或长，并且比其它完成更好的性能，比较了过滤器。

简介：Multi-cellmulti-usermultiple-inputmultiple-output(MC-MU-MIMO)isapromisingtechniquetoeliminateinter-userinterferenceandinter-cellcochannelinterferenceinwirelesstelecommunicationsystems.AsthelargenumberofusersinthesystemandthelimitednumberofsimultaneouslysupportableuserswithMC-MU-MIMO,itisnecessarytoselectasubsetofuserstomaximizethetotalthroughput.However,thefullycentralizeduserselectionalgorithmsusedinsinglecellsystem,whichwillincurhighcomplexityandbackhaulloadinmulti-cellcooperativeprocessing(MCP)systems,arenotsuitabletoMC-MU-MIMOsystems.ThisarticlepresentsatwocascadeduserselectionmethodforMCPsystemswithmulti-cellblockdiagonalization.Inthispaper,alocaloptimalsubsetofusers,whichcanmaximizethelocalsumcapacity,isfirstchosenbythegreedymethodineverycooperativebasestationinparallel.Then,allthecooperativebasestationsreporttheirlocaloptimaluserstothecentralunit(CU).Finally,theglobaloptimalusers,whichcanmaximizetheglobalsumcapacityofMCPsystems,areselectedfromtheaggregatedlocaloptimalusersattheCU.Thesimulationresultsshowthattheproposedmethodperformscloselytotheoptimalandcentralizedalgorithm.Meanwhile,thecomplexityandbackhaulloadarereduceddramatically.

简介：Aschemeisproposedtoelevatethelimitationofthegroundapplicationsystemofmono-satellite-sensorundertherequirementofremotesensingsatellitegroundapplicationsystem.Intheresource-sharing,forinstancecaculatingresource,asimplephototypeofcaculating-resourceisproposedthroughanalyzingresourceassignment,applicationassignment,bodystructure,andsoon.Inordertoimprovetheabilityofassignment,realizethefavorableutility,management,andmaintenance,thephototypeisimprovedbyusingdatagridcalculationaccordingtotherequirementandcharacterofactualapplication.Thephototypecanbetakenasthefoundationofcalculationframeofremotesensinggroundapplicationsystemofmulti-satelliteandmulti-sensor.

简介：In2005,Bao,etal.[Appl.Math.andComput.,vol.169,No.2,2005]showedthatTzeng,etal.’snonrepudiablethresholdmulti-proxymulti-signatureschemewithsharedverificationwasinsecure,andproposedanimprovedschemewithnoShareDistributionCenter(SDC).ThispapershowsthatBao,etal.’sschemesuffersfromtheproxyrelationshipinversionattackandforgeryattack,andpro-posesanimprovementofBao,etal.’sscheme.

简介：Anewall-opticaldemultiplexerbasedonnonlineareffectinsemiconductorlaseramplifier(SLA)isproposed.ItcandemultiplexallchannelsoftheOTDMsignalconcurrently.anditcanalsobeintegratedonasinglechip.TheproposeddeviceconsistsofaseriesshortFabry-Perotamplifiers(FPSLA)settingonthepathverticsally,throughwhichthepreamplifiedopticalsignaltravels.Perpendicularlytothesignal,K(channelnumber)paralleledbeamsoflightpulse,whichactasprobeswithrepetitionatthebitrateofonechannel,irradiateontheseFP-SLAs,respectively,justwhenthecorrespondingsignalchannelpulsepassesthroughtheactiveregionfromlateralside.Thetransmissivitydependsonthesignalpulse.Theoreticalanalysishasbeengiven.Asademonstratingexample,Adeviceoperatedatthespeedof25Gbit/s(2.5Gbit/s×10)issimulatedandtheresultsshowthattheabout9.24dBextinctionratiocanbeachievedeasily.

简介：Duetothefeaturesofthemulti-spectralimages,theresultwiththeusualmethodsbasedonthesupportvectormachine(SVM)andbinarytreeisnotsatisfactory.Inthispaper,afuzzySVMmulti-classclassifierwiththebinarytreeisproposedfortheclassificationofmulti-spectralimages.Theexperimentisconductedonamulti-spectralimagewith6bandswhichcontainsthreeclassesofterrains.Theexperimentalresultsshowthatthismethodcanimprovethesegmentationaccuracy.

简介：Inwirelesscellularnetworks,theinterferencealignment(IA)isapromisingtechniqueforinterferencemanagement.AnewIAschemefordownlinkcellularnetworkwithmulti-cellandmulti-userwasproposed.Intheproposedscheme,theinterferenceinthenetworksisdividedintointer-cellinterference(ICI)amongcellsandinter-userinterference(IUI)ineachcell.TheICIisalignedontoamulti-dimensionalsubspacebymultiplyingtheICIalignmentprecodingmatrixwhichisdesignedbythesingularvaluedecomposition(SVD)schemeatthebasestation(BS)side.ThealignedICIiseliminatedbytimingtheinterferencesuppressionmatrixwhichisdesignedbyzero-forcing(ZF)schemeattheuserequipment(UE)side.Meanwhile,theIUIisalignedbymultiplyingtheIUIalignmentprecodingmatrixwhichisdesignedbasedonNashbargainingsolution(NBS)ingametheory.TheNBSissolvedbytheparticleswarmoptimization(PSO)method.Simulationsshowthat,comparedwiththetraditionalZFIAscheme,theproposedschemecanobtainhigherdatarateandguaranteethedataratefairnessofUEswithlittleadditionalcomplexity.

简介：Militarytacticalnetworkisoneofthemostimportantapplicationsofadhocnetwork.Currentlytheexistingroutingprotocolsareputforwardbasedonthesimpleanduniversalnetworkmodelwhichhastheabilityofmulti-hoproutingbutcannotworkefficientlyinthespecialmilitaryapplications.Thenarrowbandwidthandlimitedenergyofthewirelessnetworkmakegeneralroutingprotocolsseemtobemoreredundant.Inordertosatisfymilitaryneedsproperly,thislettermakesadetailedanalysisofphysicalnodesandtrafficdistributioninmilitarynetwork,usescross-layerdesignconceptforreference,combinestrafficcharacteristicofapplicationlayerwithroutingprotocoldesign.Itcategorizedroutingproblemascrucialroutesandnon-crucialrouteswhichadoptedseparatemaintenancemethods.Itnotonlyrealizesbasictransmissionfunctionbutalsoworksefficiently.Itisquitefitformilitaryapplication.

简介：多代理签名是一位原来的签名人托付签署能力到一个代理组的一个计划。在计划，仅仅在代理组的所有代理签名人的合作能代表原来的签名人创造签名。Jin和皮脂腺囊瘤第一定义无证书的多代理签名(CLMPS)的正式安全模型并且建议了一个具体CLMPS计划。然而，他们的构造有三个问题：加强的安全模型的定义是不精密的，具体签名计划有一个安全缺陷，并且安全的证明是有瑕疵的。与进一步的考虑，一个补救加强的安全模型被重新定义，并且一个改进计划是也存在地求婚了，它是unforgeable对适应地，选择保证，选择消息和选择身份在随机的神谕攻击。处于这个条件，计算Diffie-Hellman(CDH)假设被用来为我们的CLMPS计划证明安全完整。

简介：RecentresearchprogressesinMulti-BeamKlystron(MBK)inIECASarebrieflyintroducedintheletter.TheS-bandMBKsofIECAShavepeakpowerof120-250kW,averagepowerof4-9kW,efficiencyof35-45%,gainof41-46dB,beamvoltageof15-19kV,andweightof40-45kg.SomekeytechnicalproblemsofMBKarealsodescribedanddiscussed.Amongthem,improvingthedesignofMBKtoobtaintherequiredbandwidth,raisingbeamtransmissiontoincreaseaveragepower,eliminatingoscillationandsprayspectrum,overcomingwindowbreakdowncausedbymagicmode,reducingbreakdowntimesofelectrongun,aremostimportantthingsforthepracticalMBK.Besides,furtherresearchworkinMBKinIECASiscommented.

简介：Poly4-vinylphenol(P4VP)/multi-wallcarbonnanotubes(MWNTs)multi-layersensitivefilmsweredepositedoninterdigitatedelectrodesbyairbrushtechnologytodetecttoluenevaporatroomtemperature.Thesurfaceandsectionmorphologiesofthemulti-layerfilmswereobservedbyascanningelectronmicroscope(SEM).Itisfoundthattheresistanceofthesensorincreaseswhenitisexposedtotoluenevaporandtheresponsehasagoodlinearitywiththeconcentrationoftoluene.TheresultsshowthattheP4VP/MWNTsthree-layerfilmsensorshavebettersensingpropertiescomparedwiththetwo-layerfilmsensors.Therelatedsensingmechanismisstudiedindetail.

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简介：Watershedtransformationisapowerfulmorphologicaltoolimagesegmentation.However,theperformanceoftheimagesegmentationmethodsbasedonwatershedtransformationdependslargelyonthealgorithmforcomputingthegradientoftheimagetobesegmented.Inthispaper,wepresentamulti-scalegradientalgorithmbasedonmorphologicalopenatorsforwatershed-basedimagesegmentation,witheffectivehandlingofbothstepandblurrededges.Wealsopresentanalgorithmtoeliminatethelocalminimaproducedbynoiseandquantizationerrors.Experimentalresultsindicatethatwatershedtransformationwiththealgorithmsproposedinthispaperproducesmeaningfulsegmentations,evenwithoutaregion-mergingstep.

简介：Theprocessingspeedofthecommunicationbetweennodesinaparallelprocessorhasbecomethemajorbottleneckoftheprocessor'sperformance.RDMA(RemoteDirectMemoryAccess)technologyhasdrawnmoreattentionrecentlyduetoitscapabilityoftransferringalargeramountofdata,higherspeedandreliability.4DSP(4DigitalSignalProcessing)modulecomprisedofTiger-SHARC201chipisconnectedbyLVDS(LowVoltageDifferentialSignal)circuits.ThispaperproposesageneralandreconfigurableRDMAplatformanditscorrespondingcommunicationprotocolwithalltherouteslinkedbasedonthezerocopy.TheprotocoltransfersmessageofDSPbyinterruptingofDMAandisappliedonmassiveremoteimageimpression,whichreducesmemoryneedsandworkingburdenofCPU.Theexperimentresultsshowthisplatformisefficient,flexible,andexpandableofbeingintegratedtoalargerscaleinthenextdevelopmentstages.

简介：Ascanningnear-fieldopticalmicroscopeusinguncoatedfibertipisdescribed,whichcanworkintransmissionandreflectionconfigurations,bothcapableofworkinginilluminationandcollection-mode,sothateithertransparentoropaquesamplecanbeinvestigated.Dependingondifferentapplications,eitherconstant-gaporconstant-heightimagescanbeachieved.Acompacthomemadetranslatorpermitstoselectinterestedareaofsampleintherangeof4mm×4mm.Workingintheconstant-heightaswellastransmissionandcollection-modeconfiguration,severalkindsofsamplessuchasholographicgrating,liposomeandzeolitewereinvestigated.TheexperimentalresultsrevealedthedependenceoftheopticalresolutionoftheSNOMonthetip-sampleseparation.

简介：Coordinatedmulti-pointtransmission/reception(CoMP)wasproposedcurrentlyasaneffectivetechnologytoimprovecell-edgethroughputinnext-generationwirelesssystems.Mostoftheexistingworkdiscussedclusteringmethodsmostlytomaximizetheedgeuserthroughputwhileneglectingtheproblemofenergyefficiency,suchasthosealgorithmclusteringbasestations(BSs)ofbetterchannelconditionandBSsofworsechannelconditiontogether.Inaddition,BSsusuallyincreasethetransmitpowertoachievehigherthroughputwithoutanyconsideringofinterferencecausedtootherusers,thatmayresultinenergywaste.TheauthorsfocusonthethroughputmaximizingproblemwhilefullyconsideringenergysavingprobleminCoMPsystems.Acoefficientisdefinedtodescribethefitnessofclusters.Thenasub-carrierallocationalgorithmwithclusteringmethodisputforwardforCoMPdownlink,whichcansavethetransmitpowerofBSandincreasethethroughput.Furthermoreapowerallocationschemeisproposedbasedonnon-cooperationgame;inwhichthetransmitpowerisdecreasedbyBSsgenerallytoreachtheNashequation(NE).Simulationshowsthattheproposedsub-carrierallocationschemeandpowerallocationalgorithmarebetterthantheexistingonesonusers’throughputwhileconsumesmuchlessenergy.

简介：阀值签名起一个重要作用在现代电子社会散布一个单个权威的力量。以便增加功能并且改进阀值签名的效率，有签署当局区分的一个多政策阀值签名计划被建议。在计划，二个组能签名并且验证对方，因此计划是双向的签名并且验证。而且，二个组的阀值价值能随着签名文件的安全分类变化，每个自由签署者仅仅签署这个文件的小部分而不是整个的，为组签名建设的数据传播的带宽能因此被减少，组签名的尺寸等价于任何单个签名的。

简介：Sonarimageshavecomplexbackground,lowcontrast,anddeteriorativeedges;thesecharacteristicsmakeitdifficultforresearcherstodisposethesonarobjects.Themulti-resolutionanalysisrepresentsthesignalsindifferentscalesefficiently,whichiswidelyusedinimageprocessing.Waveletsaresuccessfulindisposingpointdiscontinuitiesinonedimension,butnotintwodimensions.ThefiniteRidgelettransform(FRIT)dealsefficientlywiththesingularityinhighdimension.Itpresentsthreeimproveddenoisingapproaches,whicharebasedonFRITandusedinthesonarimagedisposaltechnique.Byexperimentandcomparisonwithtraditionalmethods,theseapproachesnotonlysuppresstheartifacts,butalsoobtaingoodeffectinedgekeepingandSNRofthesonarimagedenoising.

简介：Inthisarticleabridgebetweentheexpectedcomplexityandperformanceofspheredecoding(SD)isbuilt.TheexpectedcomplexityofSDforinfinitelatticesistheninvestigated,whichnaturallyistheupper-boundofthoseforallthefinitelatticesifgivenbythesamechannelmatrixandsignalnoiseratio(SNR).SuchexpectedcomplexityisanimportantcharacterizationofSDinmulti-antennasystems,becausenomatterwhatmodulationschemeisusedinpractice(generallyithasfiniteconstellationsize)thisupper-boundholds.AbovebridgealsoleadstoanewmethodofdeterminingtheradiusforSD.Thenumericalresultsshowboththerealvalueandupper-boundofaveragesearchednumberofcandidatesinSDfor16-QAMmodulatedsystemusingtheproposedsphereradiusdeterminingmethod.MostimportantofallnewunderstandingsofexpectedcomplexityofSDaregivenbasedonabovementionedtheoreticanalysisandnumericalresults.

简介：TheLeastSquaresSupportVectorMachines(LS-SVM)isanimprovementtotheSVM.CombinedtheLS-SVMwiththeMulti-ResolutionAnalysis(MRA),thisletterproposestheMulti-resolutionLS-SVM(MLS-SVM).TheproposedalgorithmhasthesametheoreticalframeworkasMRAbutwithbetterapproximationability.AtafixedscaleMLS-SVMisaclassicalLS-SVM,butMLS-SVMcangraduallyapproximatethetargetfunctionatdifferentscales.Inexperiments,theMLS-SVMisusedfornonlinearsystemidentification,andachievesbetteridentificationaccuracy.