学科分类
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110 个结果
  • 简介:为光学地抽的兆兆赫激光由电容的长带栅栏和挤的高抵抗力的硅底层组成的产量coupler理论上被设计,它的发射度表演也被讨论。经常发生在以前的实验的etalon效果有效地被压制,并且因此,一个扁平、精确的发射度系列在2厘米的狭窄的wavenumber间隔被获得?1接近特别中心wavenumber。而且,到底层厚度的细微移动的发射度敏感完全也被消除。挤的产量coupler是容易的制作,它的底层可以反复被使用满足各种各样的发射度要求。

  • 标签: 光栅耦合器 太赫兹 光电容 输出 楔形 理论设计
  • 简介:为波浪繁殖建模的一个新方法在这份报纸被介绍。由使用限制优化(Lagrange更多样地)方法,当使遭到了到限制时,加权的摆平的Fourier振幅的和被最小化。从所有产量模型获得的最大的振幅的和被规范化为统一并且作为限制被拿。在这个方法,所有实际时间历史被看作产量并且同等地处理了。独立于时间历史的联合(或选择的第一次历史)在分析期间,方法捕获由出现的历史清除山峰的实际时间的关系。这份报纸描述模型的明确的表达并且在规范的输入产量最小化(NIOM)上说明这个方法的优点方法。Mod-NIOM然后被用来分析在科比在端口岛垂直数组地点记录的Hyogoken-nanbu地震的时间历史,它受不了强壮的运动在主要吃惊期间引起的液化。尽管表面时间历史被液化极大地修改,这个方法在这个地点显示出在观察时间历史之间的好关联。

  • 标签: 英国国防部 模拟地震 最小化 投入产出 波的传播 时间历程
  • 简介:Thispaperpresentsanovelapproachtodetectanddiagnosefaultsinthedynanmicpartofachisofstochasticsys-tems.theSuchagroupofsystemsaresubjectedtoasetofcrispinputsbuttheoutputsconsideredarethemeasurableprobabilitydensityfunctions(PDFs)ofthesystemoutput,ratherthanthiesystemoutputalone.Anewapproximationmodelisdevelopedfortheoutputprobabilitydensityfunctionssothatthedynamicpartofthesystemisdecoupledfrontheoutputprobabilitydensityfunctions.Anonlinearadaptiveobserverisconstructedtodetectanddiagnosethefaultinthedynamicpartofthesystem.Convergencyanalysisisperfomedfortheerrordynamicsraisedfromthefaultdetectionanddiagnosisphaseandanapplicabilitystudyonthedetectionanddiagnosisoftheunexpectedchangesinthe2Dgrmmagedistributionsinapaperformingprocessisincluded.

  • 标签: 缺陷调查诊断 观察设计 造纸业 随机系统
  • 简介:紧缩的diode-side-pumpedTm:钇铝柘榴石激光被介绍,它能在2.02mm输出cw力量的51W。Tm:钇铝柘榴石杆是九个二极管数组在25degC与783nm的中央波长和大约2.5nm的with带宽抽的方面。减少热效果在上结束并且有效地驱散热,一合成Tm:有undoped钇铝柘榴石结束的钇铝柘榴石杆盖住,螺丝钉在杆的方面表面上穿被用作激光水晶。2.02公里激光产量的最大的optical-to-optical变换效率是14.2%,与26.8%的斜坡效率。[从作者抽象]

  • 标签: Tm:YAG激光器 连续波 二极管 光泵
  • 简介:Basedontheclassical(matrixtype)input-outputanalysis,atypeofnonlinear(continuoustype)conditionalLeontiefmodel,input-outputequationwereintroduced,aswellasthreecorrespondingquestions,namely,solvability,continuityandsurjectivity,andsomefixedpointandsurjectivitymethodsinnonlinearanalysiswereusedtodealwiththesequestions.Asaresult,themaintheoremsareobtained,whichprovidesomesufficientcriterionstosolveabovequestionsdescribedbytheboundarypropertiesoftheenterprise'sconsumingoperator.

  • 标签: 输入-输出方程 可解性 非线性分析 固定点 连续性 半连续性
  • 简介:Becauseconditionsforthegrainproductionarenotfavorableandtheinputintheproductionfactorsofmodernagricultureisnotsufficient,thegrainsupplyhasbeenlessthanthedemandforalongtime.Bymeansofgreycorrelationanalysis,thispaperdealswiththecorrelationsituationamongsuchinputfactorsasthegrainsownarea,thetotalpowerofagriculturalmachinery,thefertilizerutilizationvolume,theactualirrigationarea,thedamagearea,thenumberoffarminglaborforce,inordertounderstandthemajorrestrictinganddrivingforcesthathaveaffectedthegrainoutputintherecent23years.TheanalysisshowsthatthegrainsownareaandfertilizerutilizationvolumearethetwomostimportantleadingfactorsthataffectgrainproductioninGuizhouProvince,whilethedamageareaandthetotalpowerofthefarming-usedmachinesarethefollowingfactors.Fertilizerutilizationvolumeandtheactualagriculturalmachineryandirrigationareaarethetwoincreasinglyinfluentialfactorsthataffectgrainproduction.Theinfluenceofthefarminglaborforceupongrainproductionbecamelessstrong.ThemainmeasurestoincreasegrainproductionoutputinGuizhouProvincearetostabilizethearableland,increasetheactualirrigationarea,expeditethetransferofthefarminglaborforceandincreasetheinputofmodernagriculture.

  • 标签: 贵州 谷类生产量 投入因素 灰色关联度分析 粮食产出
  • 简介:AnAnalysisofthePotentialofChina′sGrainOutputin2000———BytheHeadRuralSurveyTeamoftheStateStatisticalBureauhina′sgrainoutputincr...

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  • 简介:在这份报纸,易于不同骚乱的一般异构的非线性的多代理人系统的输出一致问题被考虑。一种Takagi-Sukeno模糊建模方法被用来描述非线性的代理人动力学。基于模型,一个分布式的模糊观察员和控制器基于分布式的赔偿计划和内部引用建模的平行被设计以便异构的非线性的多代理人系统能完成输出一致。然后,一个必要、足够的条件为产量一致问题被介绍。并且全球模糊模型的一致轨道被网络拓扑学和内部参考书模型的起始的状态决定,这被显示出。最后,一些模拟被给说明并且验证建议计划的有效性。

  • 标签: T-S模糊模型 多智能体系统 一致性问题 系统输出 非线性 并行分布式
  • 简介:Inthispaper,anextendedKendallmodelforthepriorityschedulinginput-linegroupoutputwithmulti-channelinAsynchronousTransferMode(ATM)exchangesystemisproposedandthenthemeanmethodisusedtomodelmathematicallythenon-typicalnon-anticipativePRiorityservice(PR)model.Comparedwiththetypicalandnon-anticipativePRmodel,itexpressesthecharacteristicsofthepriorityschedulinginput-linegroupoutputwithmulti-channelinATMexchangesystem.ThesimulationexperimentshowsthatthismodelcanimprovetheHOLblockandtheperfonnanceofinput-queuedATMswitchnetworkdramatically.ThismodelhasabetterdevelopingprospectinATMexchangesystem.

  • 标签: 异步传输模式 ATM 异步传输网络 优先权 建模
  • 简介:Nyquistfoldingreceiver(NYFR)isatypicalwidebandanalog-to-informationarchitecture.Focusingonthenoncooperativereceiving,thepulseradarsignalinterceptedbytheNYFRintimedomainisanalyzed.TheNYFRoutputsunderdifferentinputconditionsareinvestigatedbasedontheextendedFouriertransform(EFT)andthesamplingtheorem.CombiningwiththecharacteristicoftheNYFRoutputintimedomain,anewtimeofarrival(TOA)estimationmethodbasedontheenergyenvelopeandthewavelettransformisproposed.Theproposedestimationmethodcanbeadaptedforthenon-cooperativesituation.Ithasnorequirementforpriorinformationtodeterminethethresholdandisnotnecessarytotransformthesignalintobaseband.SimulationresultsprovethecorrectnessoftheNYFRoutputexpressionsandshowtheefficacyoftheproposedestimationmethod.

  • 标签: NYQUIST folding receiver (NYFR) time of
  • 简介:Changesoftheaveragebrightnessandnon-uniformityofdarkoutputimages,andqualityofpicturescapturedundernaturallightingforthecolorCMOSdigitalimagesensorsirradiatedatdifferentelectrondoseshavebeenstudiedincomparisontothosefromtheγ-irradiatedsensors.Fortheelectron-irradiatedsensors,thenon-uniformityincreasesobviouslyandasmallbrightregiononthedarkimageappearsatthedoseof0.4kGy.Theaveragebrightnessincreasesat0.4kGy,increasessharplyat0.5kGy.Thepictureisveryblurryonlyat0.6kGy,showingthesensorundergoessevereperformancedegradation.ElectronradiationdamageismuchmoreseverethanγradiationdamagefortheCMOSimagesensors.Apossibleexplanationispresentedinthispaper.

  • 标签: 辐射损伤 电子辐射 Γ辐射 互补金属氧化物半导体 彩色摄象传感器 输出特性
  • 简介:Weproduceamaximum1.45Wlaseroutputat1064nmusinganeodymium-dopedsilicateglassfiberthathasarectangularcorewithdimensionsof~6.3μm×31.5μm.Themeasureddivergenceanglesoftheoutputlaserintwodimensionsare3.22°and1.76°,respectively.Theoutputpowerisstableandlimitedonlybytheavailablepumppower.

  • 标签: 硅酸盐玻璃 激光输出 光纤激光器 掺钕 矩形 瓦级
  • 简介:Thepaperestablishedadoublefilteringmethod(DFM)tovisualizetheskeletonindustrialstructure(SIS)ofoneeconomyandfinditsevolutionrule.Differentwiththepreviousresearches,thismethodisfromanewviewofindustrialconjunctionscombinedbyleadingsectorstodepicttheindustrialstructure.ItwasprovedthattheleadingsectorselectedbyDFMmustbekeysectorselectedbyHirschman-Rasmussenmethod.AppliedDFMtoinput-outputtablesofChina,JapanandUSAandMFAtoJapan,andUSA,theresultsanalysisshowedthatDFMcouldovertakethetwomainshortcomingsofminimumflowanalysis(MFA),scratchSISofeacheconomywithitsowncharacteristics,visualizethegeneralevolutionrulesoftheindustrialstructurewithcrisscrossedconjunctionsamongleadingsectors.

  • 标签: Double FILTERING METHOD economic growth evolution
  • 简介:Wepresentacontinuous-wavesingly-resonantopticalparametricoscillatorwith1.5%outputcouplingoftheresonantsignalwave,basedonanangle-polishedMgO-dopedperiodicallypoledlithiumniobate(MgO:PPLN),pumpedbyacommercialNd:YVO4laserat1064nm.Theoutput-coupledopticalparametricoscillatordeliversamaximumtotaloutputpowerof4.19Wwith42.8%extractionefficiency,acrossatuningrangeof1717nminthenear-andmid-infraredregion.Thisindicatesimprovementsof1.87Winoutputpower,19.1%inextractionefficiencyand213nmintuningrangeextensionincomparisonwiththeopticalparametricoscillatorwithnooutputcoupling,whileattheexpenseofincreasingtheoscillationthresholdbyafactorof~2.Moreover,itisconfirmedthatthefiniteoutputcouplingalsocontributestothereductionofthethermaleffectsincrystal.

  • 标签: 光学参量振荡器 输出耦合 连续波 共振 ND:YVO4激光器 可调谐
  • 简介:Thetime-delaysignature(TDS)ofchaosoutputina1550nmvertical-cavitysurface-emittinglaser(VCSEL)subjecttofiberBragggrating(FBG)feedbackisinvestigatedexperimentally.Autocorrelationfunction(ACF)andmutualinformation(MI)areusedforquantitativelyidentifyingtheTDSofchaos.Forvariousbiascurrents,theTDSevolutionwiththefeedbackstrengthisdifferent,astheFBGprovideswavelength-selectivefeedback.Furthermore,basedontheTDSmapoftheFBGfeedbackVCSEL(FBGF-VCSEL)intheparameterspaceoffeedbackstrengthandbiascurrent,theoptimalTDSsuppressionregions,wherethedominantpolarizationmodeofFBGF-VCSELlocatesattheedgeofthemainlobeofFBGreflectionspectrum,havebeendetermined.Finally,forcomparativepurpose,theTDSofchaosinmirrorfeedbackVCSEL(MF-VCSEL)alsohasbeenpresented,andtheresultsshowthatanFBGF-VCSELpossessesbetterTDSsuppressionperformancethananMF-VCSEL.

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  • 简介:Blindidentification-blindequalizationforFiniteImpulseResponse(FIR)MultipleInput-MultipleOutput(MIMO)channelscanbereformulatedastheproblemofblindsourcesseparation.Ithasbeenshownthatblindidentificationviadecorrelatingsub-channelsmethodcouldrecovertheinputsources.TheBlindIdentificationviaDecorrelatingSub-channels(BIDS)algorithmfirstconstructsasetofdecorrelators,whichdecorrelatetheoutputsignalsofsubchannels,andthenestimatesthechannelmatrixusingthetransferfunctionsofthedecorrelatorsandfinallyrecoverstheinputsignalusingtheestimatedchannelmatrix.Inthispaper,anewapproximationoftheinputsourceforFIR-MIMOchannelsbasedonthemaximumlikelihoodsourceseparationmethodisproposed.TheproposedmethodoutperformsBIDSinthepresenceofadditivewhiteGaussiannoise.

  • 标签: 自适应白噪声 信号源分离 信道去相关 信道矩阵