简介：ThispaperinvestigatestheuntraditionalapproachofcontentionresolutioninWavelengthDivisionMultiplexing(WDM)OpticalPacketSwitching(OPS).Themoststrikingcharacteristicsofthedevelopedswitcharchitectureare:(1)ContentionresolutionisachievedbyacombinedsharingofFiberDelay-Lines(FDLs)andTunableOpticalWavelengthConverters(TOWCs);(2)FDLsarearrangedinnon-degenerateform,i.e.,non-uniformdistributionofthedelaylines;(3)TOWCsjustcanperformwavelengthconversioninpartialcontinuouswavelengthchannels,i.e.,sparsewavelengthconversion.TheconcreteconfigurationsofFDLsandTOWCsaredescribedandanalyzedundernon-burstyandburstytrafficscenarios.Simulationresultsdemonstratethatforaprefixedpacketlossprobabilityconstraint,e.g.,10-6,thedevelopedarchitectureprovidesadifferentpointofviewinOPSdesign.Thatis,combinedsharingofFDLsandTOWCscan,effectively,obtainagoodtradeoffbetweentheswitchsizeandthecost,andTOWCswhichareachievedinsparseformcanalsodecreasetheimplementingcomplexity.

简介：在有直接路径的严肃的堵住的城市的环境，non-line-of-sight(NLOS)繁殖影响地点评价精确性。在这篇文章，一个新奇算法被开发，它能显著地在地点评价减轻NLOS错误。多利用天线数组，信息散布ers那个原因NLOS繁殖被获得。然后，我们把信息与TOA/TDOA相结合估计活动车站(MS)的地点的基于的地点算法。模拟结果证明我们的方法能减轻NLOS错误并且极大地提高地点精确性。

简介：Fromtheperspectiveofcompressedsensing(CS)theory,thechannelestimationprobleminlarge-scalemultipleinputmultipleoutput(MIMO)-orthogonalfrequencydivisionmultiplexing(OFDM)systemisinvestigated.Accordingtothetheory,thesmallermutualcoherencethereconstructionmatrixhas,thehighersuccessprobabilitytheestimationcanobtain.Aimingtodesignapilotthatcanmakethesystemreconstructionmatrixhavingthesmallestmutualcoherence,thispaperproposesalowcomplexityjointalgorithmandobtainsakindofnon-orthogonalpilotpattern.Simulationresultsshowthatcomparedwiththeconventionalorthogonalpilotpattern,applyingtheproposedpatternintheCSchannelestimationcanobtainthebetternormalizedmeansquareerrorperformance.Moreover,thebiterrorrateperformanceofthelarge-scaleMIMO-OFDMsystemisalsoimproved.

简介：这份报纸基于最小的均方差(MMSE)建议一个联合非线性的收发器设计计划为非再生的多重输入的标准多重产量(MIMO)继电器系统。建议计划分解错误协变性矩阵，再用形式表示二分开优化问题的原来的联合设计问题，然后向一个靠近形式的答案提供仅仅本地的隧道状态信息(CSI)在来源和目的地可得到。表演评估证明建议计划显著地超过线性计划，并且与存在全球CSI相比有竞争表演基于的非线性的计划，反复、非反复。

简介：Facerecognitionbasedonfewtrainingsamplesisachallengingtask.Indailyapplications,sufficienttrainingsamplesmaynotbeobtainedandmostofthegainedtrainingsamplesareinvariousilluminationsandposes.Non-sufficienttrainingsamplescouldnoteffectivelyexpressvariousfacialconditions,sotheimprovementofthefacerecognitionrateunderthenon-sufficienttrainingsamplesconditionbecomesalaboriousmission.Inourwork,thefacialposepre-recognition(FPPR)modelandthedualdictionarysparserepresentationclassification(DD-SRC)areproposedforfacerecognition.TheFPPRmodelisbasedonthefacialgeometriccharacteristicandmachinelearning,dividingatestingsampleintofull-faceandprofile.Differentposesinasingledictionaryareinfluencedbyeachother,whichleadstoalowfacerecognitionrate.TheDD-SRCcontainstwodictionaries,full-facedictionaryandprofiledictionary,andisabletoreducetheinterference.AfterFPPR,thesampleisprocessedbytheDD-SRCtofindthemostsimilaroneintrainingsamples.Theexperimentalresultsshowtheperformanceoftheproposedalgorithmonolivettiresearchlaboratory(ORL)andfacerecognitiontechnology(FERET)databases,andalsoreflectcomparisonswithSRC,linearregressionclassification(LRC),andtwo-phasetestsamplesparserepresentation(TPTSSR).

简介：以便学习在非球形的大气的控告的粒子和卫星地面量连接变细之间的关系。在粒子集中，相等的半径，控告的粒子的费用密度，变细系数和卫星地面量连接的纠纷之中的关系能根据扑灭十字节首先被建立并且光谱非球形的大气的控告的粒子的分发功能。在大气的可见性和卫星地面量连接的通讯忠实之间的量的关系那时被分析。模拟结果证明椭圆体，对卫星地面量连接的变细的大气的控告的粒子影响日益增多地增加的Chebyshev。当相等的粒子半径是0.2m和粒子时，集中是卫星地面量的变细系数和纠纷连接的50g/m3,是9.21dB/km，11.46dB/km并且0.453，0.421分别地；当大气的可见性从8把km归结为2km时，卫星地面量连接的通讯忠实从0.52～0.08减少。非球形的大气的控告的粒子和大气的可见性在卫星地面量连接通讯系统的性能上极大地影响，这被显示出。因此，在空气根据空气的可见性值和控告的粒子的形状调整量卫星通讯系统的参数改进卫星地面量连接的可靠性是必要的。