简介：Paralysisfollowingspinalcordinjury(SCI)isduetofailureofaxonalregeneration.Itisbelievedthatthecapacitiesofneuronstoregrowtheiraxonsareduepartlytotheirintrinsiccharacteristics,whichinturnaregreatlyinfluencedbyseveraltypesofinhibitorymoleculesthatarepresent,orevenincreasedintheextracellularenvironmentoftheinjuredspinalcord.Manyoftheseinhibitorymoleculeshavebeenstudiedextensivelyinrecentyears.IthasbeensuggestedthatthesmallGTPaseRhoAisanintracellularconvergencepointforsignalingbytheseextracellularinhibitorymolecules,butduetothecomplexityofthecentralnervoussystem(CNS)inmammals,andthelimitationofpharmacologicaltools,thespecificrolesofRhoAareunclear.ByexploitingtheanatomicalandtechnicaladvantagesofthelampreyCNS,werecentlydemonstratedthatRhoAknockdownpromotestrueaxonregenerationthroughthelesionsiteafterSCI.Inaddition,wefoundthatRhoAknockdownprotectsthelarge,identifiedreticulospinalneuronsfromapoptosisaftertheiraxonswereaxotomizedinspinalcord.Therefore,manipulationoftheRhoAsignalingpathwaymaybeanimportantapproachinthedevelopmentoftreatmentsthatarebothneuroprotectiveandaxonregeneration-promoting,toenhancefunctionalrecoveryafterSCI.

简介：Adopting'simultaneoustransmitting,simultaneousreceiving'operationalscheme,instantaneouspolarizationradar(IPR)canmeasuretargetpolarizationscatteringmatrix(PSM)usingonlyoncetargetechoesintwoorthogonalpolarizationchannels.Firstly,signalmodelandsignalprocessareadvancedundernarrowbandcondition.Secondly,measurementperformancesoftwotypicalIPRwaveformsareanalyzedindetail.Atlast,fieldexperimentsarecarriedoutusingX-bandIPRsystemdesignedbyNationalUniversityofDefenseTechnology(NUDT),China.Comparedwithresultsobtainedbyalternativepolarizationmeasurementscheme,followingresultscanbeobtained:thedifferenceofrelativeamplitudemeasurementresultsissmallerthan2dBandthatofrelativephasemeasurementresultsissmallerthan10?,verifyingthevalidityofinstantaneouspolarizationmeasurementscheme.

简介：Thedesignsofinertialconfinementfusion(ICF)targets,whichfieldonShenGuangIII,arebecomingmorecomplexandmorestringentintermsofassemblyprecision.Akeyspecificationofthesetargetsisthespatialanglealignmentaccuracy.Tomeettheseneeds,wepresentanewspatialangleassemblymethod,usingtargetpart's3Dmodel-baseddualorthogonalcameravision,whichisbettersuitedfortheflexibleautomationoftargetassemblyprocesses.Thetwo-handsstructuremicromanipulatesystemanddualorthogonalstructurevisualfeedbacksystemwereinvestigatedbyconsideringthekinematics,spatialanglemeasuring,andmotioncontrolinanintegratedway.Inthispaper,wediscussthemeasurementaccuracyofspatialangleassemblymethod,whichcomparedthereal-timeimageacquisitionwiththeredrawing2Dprojection.Theresultshowsthattheassemblymethodproposedisveryeffectiveandmeetstherequirementsofangleassemblyaccuracy,whichislessthan1°.Also,thisworkisexpectedtocontributegreatlytotheadvancementofothertargetmicroassemblyequipments.

简介：Anovelopticaltestingtarget(OTT)withthreedegreesoffreedom(DOFs)isproposedformeasuringthetrackingperformanceofaphotoelectrictheodolite.Themaincomponents,suchastheazimuthaxissystem,thepitchingaxissystem,thelinearmotionsystem,andthesimulatedtargetgenerator,aredesigned.Furthermore,thelinearmodulewiththeformofalarge-spanandlow-stiffnesscantileverbeamisstrengthenedusinganintegratedoptimizationmethod.Afterthestructureisstrengthened,the1st-ordernaturalfrequencyincreasesfrom14Hzto32Hz.Finally,afunctionaltestisperformedandtheresultsshowthatcomparedwithatraditionalopticaltesttarget,thesimulatedtargetgeneratedbythenoveltargetisadvantageousinpractice.

简介：Weproposeimprovedmultilevelfilters(IMLFs)involvingtheabsolutevalueoperationintothealgorithmicframeworkoftraditionalmultilevelfilters(MLFs)toimprovetherobustnessofinfraredsmalltargetenhancementtechniquesunderacomplexinfraredclutteredbackground.Comparedwiththewidelyusedsmalltargetenhancementmethodswhichonlydealwithbrighttargets,theproposedtechniquecanen-hancetheinfraredsmalltarget,whetheritisbrightordark.Experimentalresultsverifythattheproposedtechniqueisefficientandpractical.

简介：Anovelefficienttrackinitiationmethodisproposedfortheharshunderwatertargettrackingenvironment(heavyclutterandlargemeasurementerrors):tracksplitting,evaluating,pruningandmergingmethod(TSEPM).Trackinitiationdemandsthatthemethodshoulddeterminetheexistenceandinitialstateofatargetquicklyandcorrectly.Heavyclutterandlargemeasurementerrorscertainlyposeadditionaldifficultiesandchallenges,whichdeteriorateandcomplicatethetrackinitiationintheharshunderwatertargettrackingenvironment.Therearethreeprimaryshortcomingsforthecurrenttrackinitiationmethodstoinitializeatarget:(a)theycannoteliminatetheturbulencesofcluttereffectively;(b)theremaybeahighfalsealarmprobabilityandlowdetectionprobabilityofatrack;(c)theycannotestimatetheinitialstateforanewconfirmedtrackcorrectly.Basedonthemultiplehypothesestrackingprincipleandmodifiedlogic-basedtrackinitiationmethod,inordertoincreasethedetectionprobabilityofatrack,tracksplittingcreatesalargenumberoftrackswhichincludethetruetrackoriginatedfromthetarget.Andinordertodecreasethefalsealarmprobability,basedontheevaluationmechanism,trackpruningandtrackmergingareproposedtoreducethefalsetracks.TSEPMmethodcandealwiththetrackinitiationproblemsderivedfromheavyclutterandlargemeasurementerrors,determinethetarget’sexistenceandestimateitsinitialstatewiththeleastsquaresmethod.What'smore,ourmethodisfullyautomaticanddoesnotrequireanykindmanualinputforinitializingandtuninganyparameter.Simulationresultsindicatethatournewmethodimprovessignificantlytheperformanceofthetrackinitiationintheharshunderwatertargettrackingenvironment.

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简介：Abasicassumptionofmostrecentlyproposedwaveformdesignalgorithmsisthatthetargetimpulseresponseisaknowndeterministicfunctionorastochasticprocesswithaknownpowerspectraldensity(PSD).However,itiswell-knownthatatargetimpulseresponseisneithereasilynoraccuratelyobtained;besidesitchangessharplywithattitudeangles.Bothoftheaforementionedcasescomplicatethewaveformdesignprocess.Inthispaper,anadaptiverobustwaveformselectionmethodforunknowntargetdetectioninclutterisproposed.Thetargetimpulseresponseisconsideredtobeunknownbutbelongstoaknownuncertaintyset.Anadaptivewaveformlibraryisdevisedbyusingasignal-to-clutter-plus-noiseratio(SCNR)-basedoptimalwaveformdesignmethod.Byapplyingtheminimaxrobustwaveformselectionmethod,theoptimalrobustwaveformisselectedtoensurethelowestperformanceboundoftheunknowntargetdetectioninclutter.Resultsshowthattheadaptivewaveformlibraryoutperformsthepredefinedlinearfrequencymodulation(LFM)waveformlibraryontheSCNRbound.

简介：在里面在水下目标察觉，底部回响有一些象目标回响的一样的性质，它在表演上有大影响。学习目标回响和回响之间的差别是必要的。在这份报纸，基于目标区别上的人的听能力的唯一的优点，Gammatone过滤器作为听觉的模型被拿。另外，时间频率感觉展示并且听觉光谱特征为活跃声纳目标回响和底部回响分离被提取。试验性的数据的特征在一样的类上有好集中特征并且有不同的类之间的大量差别，它证明这个方法罐头有效地在目标回响和回响之间区分。

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简介：AveryDennisonRFID日前宣布与Target公司签订-项全球射频识别合作协议.AveryDennison将向Target的1600家门店提供RFID技术支持,以最大限度提升库存可用性及客户体验.该项目的规模是全球同类项目中最大的.Target将利用AveryDennison广泛的UHFRFID产品组合,以满足其各类需求.

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简介：熔化力量输出不仅与参予反应的燃料粒子数字密度而且到熔化反应率系数成正比(或反应)，它依赖于反应物速度分发功能。他们通常被假定是有为热核聚变情形的一样的温度的双Maxwellian分发功能。不管多么高驱动中立横梁注射和少数离子种类ICRF血浆加热，或多拧的血浆横梁迎头向前的碰撞，在收敛，区域在未来被要求并且调查大规模熔化反应堆，当时，源于电离或费用交换的注射精力充沛的快离子尾巴的部分将足够大，他们对non-Maxwellian分发功能的贡献不是可以忽略的，因此评估fu的系数或计算到熔化反应在如此的情况，横梁目标，和横梁横梁反应改进中，效果贡献应该起很重要的作用。在这份报纸，为不同横梁和目标联合情形计算熔化反应率系数的几个有用公式详细被导出。

简介：Theeffectsofdilatationalphasetransformationonthetargetstrengthofceramicmateri-alsareinvestigatedbasedonTate’smodel.Theconstitutivebehaviorofmaterialsindifferentregions(elastic,cracked,plasticandphasetransformation)aretakenintoaccount.Itisfoundthat,withaproperchoiceofmaterialparameters,thedilatationalphasetransformationcanincreaseeffectivelythetargetstrengthR_t.Thiswouldbeofimportanceinpenetration-resistancedesign.

简介：地震成像质量对描述水库批评。有许多方法，能改进成像质量；一些依靠处理工具推进，而其它依靠改变地获得方法。然而，大多数获得方法集中于由没有认为目标层照明是精力，使用填入射击改进成像。而且，极大地射击的全部的填入增加获得费用。在这份报纸，我们在场为由自动本地填入最大化贡献到目标阴影区域照明射击的一个新方法。因此，我们设计了2D和3D模型并且由向前当模特儿获得了深度迁居节，填入射击，深度移植，等等。模型结果也证明由选择射击的点的最适当的数字，我们能提高阴影区域精力并且以低成本改进目标层成像质量。

简介：Thehighresolutionradartargetdetectionisaddressedinthenon-Gaussianclutter.Anadaptivedetectorisderivedforrange-spreadtargetbasedonanovelcovariancematrixestimator.Itisprovedthatthenewdetectorisconstantfalsealarmrate(CFAR)tobothofthecluttercovariancematrixstructureandpowerleveltheoreticallyformatchcases.ThesimulationresultsshowthatthenewdetectorisalmostCFARformismatchcases,anditoutperformstheexistingadaptivedetectorbasedonthesamplecovariancematrix.Italsoshowsthatthedetectionperformanceimproves,asthenumberofpulses,thenumberofsecondarydataortheclutterspikeincreases.Inaddition,thederiveddetectorisrobusttodifferentsubsets,estimatedcluttergroupsizesandcorrelationsofclutter.Importantly,thenumberofiterationsforpracticalapplicationisjustone.

简介：Inradartargettrackingapplication,theobservationnoiseisusuallynon-Gaussian,whichisalsoreferredasglintnoise.Theperformancesofconventionaltrackersdegradeseverelyinthepresenceofglintnoise.Animprovedparticlefilter,MarkovchainMonteCarloparticlefilter(MCMC-PF),isappliedtocopewithradartargettrackingwhenthemeasurementsareperturbedbyglintnoise.Trackingperformanceofthefilterisdemonstratedinthepresentofglintnoisebycomputersimulation.

简介：OnSeptember1st,2010,PresidentObamafulfilledhiscampaigncommitmentbywithdrawingthecombattroopsfromIraq,whichmarkedtheofficialconclusionofcombatoperationsofUStroopsinthiscountry.Althoughpeoplemayhavedifferentjudgments

简介：目标结构的机械颤动将调制雷达backscattering的阶段函数，并且将从目标导致返回的信号的频率调整。它产生目标身体Doppler频率的乐队转移的一个方面，它对目标识别有用。基于这，micro-Doppler原子宝库为目标识别被造，并且四种普通分类器独立被使用执行分类识别。模拟试验性的结果证明这个方法让高识别超过90%评价。