简介：Inordertoovercometheexistingdisadvantagesofofflinelasershockpeeningdetectionmethods,anonlinedetectionmethodbasedonacousticwavesignalsenergyisprovided.Duringthelasershockpeening,anacousticemissionsen-soratadefinedpositionisusedtocollecttheacousticwavesignalsthatpropagateintheair.Theacousticwavesignalissampled,stored,digitallyfilteredandanalyzedbytheonlinelasershockpeeningdetectionsystem.Thenthesystemgetstheacousticwavesignalenergytomeasurethequalityofthelasershockpeeningbyestablishingthecorrespondencebetweentheacousticwavesignalenergyandthelaserpulseenergy.ThesurfaceresidualstressesofthesamplesaremeasuredbyX-raystressanalysisinstrumenttoverifythereliability.Theresultsshowthatboththesurfaceresidualstressandacousticwavesignalenergyareincreasedwiththelaserpulseenergy,andtheirgrowthtrendsareconsistent.Finally,theempiricalformulabetweenthesurfaceresidualstressandtheacousticwavesignalenergyisestablishedbythecubicequationfitting,whichwillprovideatheoreticalbasisforthereal-timeonlinedetectionoflasershockpeening.

简介：Inthispaperthemodelling,analysisandoptimizationofmillimeterwaveoscillatorsareinvestigatedbyusingtheafrequency-domainharmonicbalancetechnique(FDHB),wheretheexternal-circuitimpedanceslookingoutsidefromtheactivedevicearecalculatedwithacombinedtechniqueofmodesexpansion,Galerkin,andcollocationmethods.Theoptimizationresultsareinagreementwiththeexperimentalones,whichshowthereliabilityofthepresentedmodelandoptimization.

简介：Inthisarticle,twoterahertztransmissionimagingsystemsarebuiltwitha2.52THzcontinuouswavelaserandtwotypesofsensors.Oneisarrayscanningsystemusinga124124pyro-electricarraycameraasthedetector;theotherisapoint-wisescanningsystemutilizingaGolaycellasthedetector.Theimagingspeedandqualityisbrieflyanalyzed.Terahertz(THz)imagingresultsdemonstratethatthearrayscanningsystemhashigherimagingspeedwithlowerresolution.Thepoint-wisescanningsystemhashigherimagingqualitywithlowerspeed.

简介：Theequationoftime-domainwavepropagationindispersivemediaandtheexplicitbeampropagationmethodarepresentedinthispaper.Thismethodisdemonstratedbytheshortopticalpulsesinadirectionalcouplerwithsecondorderdispersiveeffectandshowstobeinfullagreementwithformerreferences.Thismethodissimple,easyandpractical.

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简介：紧缩的兆兆赫(THz)波浪描准仪被建议，它与photonic晶体(PC)从2.4THz在频率下面工作到2.7THz平板基于自我描准效果。飞机波浪扩大(PWE)方法被用来计算分散表面和相等频率的轮廓(EFC)并且优化结构。在结构的THz波浪的繁殖被模仿，规范的传播由使用有吸收边界的完美地匹配的层(PML)的方法调节的有限差别的时间域(FDTD)是计算的。数字模拟证明设计描准仪有一个好描准性质和高发射度。

简介：Thephaseandfrequencylockingofmicrowave,millimeterwavepowercombiningwereanalysedandsummarizedinanall-roundway.Themaster/slavephaselockingofcavityoscillators,thepeerphaselockingofmutuallycoupledoscillators,andthepeerphaselockingofring-connectedmultipleoscillatorswereinvestigated.Theresultsofnumericalcalculations,andtherelationsofphasetophaselockingmodelandoscillatorparametersweregiven.Andthecavityandspacepowercombiningaspectsformicrowaveandmillimeterwavewerepresented.

简介：采用1/4波浪板为阶段延迟和波浪板的眼的轴的同时的测量使用的一个简单方法被表明。测量原则的理论分析详细被介绍。在测量，在调整标准1/4以后，挥动板并且快(慢)要测量的板的轴平行到polarizer的通行证轴，要测量的板被450counterclockwisly旋转。一台步进马达被用来旋转分析器。试验性的数据被一个光电探测器收集然后送到一台计算机。根据产量数据曲线，阶段延迟和要测量的板的眼的轴能同时被获得。为了测试方法，位/2和位的可行性，/8波浪盘子被用作例子表明测量过程。阶段延迟测量精确性比0.5脳好10?2。这个方法能被用来方便地测量任意的阶段延迟。CLC数字O436.3

简介：TherehavebeenseveralmethodsfordeterminingTwave-end.ButnoneofthemcanovercomethedifficultyfrommultiformityofECGsignalpattern.Inthispaper,amethodfordeterminingTwave-endusingevolutionaryalgorithm(EA)isproposed.Inthisway,first,everycharacteristicparameterrelatedtoTwave-endisencodedtoastringofcodes,andadaptationfunctionisconstructedwiththestringofcodes.Thenchoosetheindividualaccordingtotheadaptationfunctionvalueanddogeneticoperation(reproduction,crossoverandmutation),soastoproduceoffspringwithmoreadaptationfunctionvalue.BecauseofEA'sautoadaptationandautoorganizationcharacter,itcantraceECGsignaltypeandfindtheTwave-endautomatically.ExperimentresultsshowthattheerrorratioofrecognizingTwave-endusingthismethodismuchsmallerthanthatusingexistingmethod.

简介：与Wavel，WiMAXFomm？标准比较，Wave2RadioConformanceTest标准在移动wiMAX？的系统特性上有些新的规格，因此需要一些新的测试能力。而测试Wave2Profiles功能，对于成功建置移动WiMAX的服务至关重要，随着移动WiMAX技术在全球的快速普及，量测仪器具备该测试功能已刻不容缓。

简介：Ananalysisofsolvingtheelectromagneticscatteringbyburiedobjectsusingvectorwavefunctionexpansionispresented.Forexpandingtheboundaryconditionsbothontheplanarair-earthinterfaceandonthesphericalsurface,theconversionrelationsbetweenthecylindricalandsphericalvectorwavefunctionsarederived.Hencethevectorwavefunctionexpansionisconvenientlyappliedtosolvethiscomplexboundary-valueproblem.Fortheexcitationofthein-cidentplanewaveandthedipoleabovetheearth,thescatterlngpatternsoftheburiedconductinganddielectricspheresarepresentedanddiscussed.

简介：Thenetworks-on-chip(NoC)communicationhasanincreasinglylargerimpactonthesystempowerconsumptionandperformance.Emergingtechnologies,likesurfacewave,arebelievedtohavelowertransmissionlatencyandpowerconsumptionovertheconventionalwirelessNoC.Therefore,thispaperstudieshowtooptimizethenetworkperformanceandpowerconsumptionbygivingthepacket-switchingfabricandtrafficpatternofeachapplication.Comparedwiththeconventionalmethodofwire-linked,whichaddswirelesstransceiversbyusingthegeneticalgorithm(GA),theproposedmaximaldecliningsortingalgorithm(MDSA)caneffectivelyreducetimeconsumptionbyasmuchas20.4%to35.6%.Wealsoevaluatethepowerconsumptionandconfigurationtimetoprovetheeffectiveoftheproposedalgorithm.

简介：毫米波浪radio-over-fiber技术为在毫米波浪信号的无线通讯system.Optical产生是的下一代提供无线宽带服务表明潜力毫米波浪的光产生的一些方法的优点和缺点表明的毫米波浪radio-over-fibersystem.The的最重要的技术之一是discussed.Then光毫米波浪信号传播性能described.Finally，毫米的概述

简介：Theintensityandphaseformulasthatarevalidforthesaturationandinter-mediateregime(beforesaturation)arederived,andtheanalyticalexpressionswiththerationofsaturationintensitytototalincidentintensityastheirexplicitvariableareobtanied.Theintensitydepenenceofstationaryenergytransferinphotorefractiveacodirectionaltwo-wavemixingisexamined.Itisnecessarytousingtheseformulasinsomeproblems,suchasthetemperatureofintensitydependenceoftwo-wavemixing.Amethodofmeasuringexponen-tialgaincoefficientispresented,whichissuitablefortwo-wavemixinginintermediateregime.

简介：有一个复杂系数的一个微波photonic槽口过滤器基于混合的四个波浪(FWM)被建议并且示威。二根单个频率的激光横梁的FWM效果发生在里面高度非线性的纤维(HNLF)，和多波长光信号被产生并且过去常产生微波photonic过滤器(MPF)的多龙头。复杂系数被使用Fourier域产生光处理器(FD-OP)到控制光搬运人和阶段调整边带的振幅和阶段。结果证明这个过滤器能被控制FD-OP从通带过滤器改变到槽口过滤器。槽口过滤器的中心频率能连续地从5.853GHz被调节到29.311GHz与免费光谱11.729GHz的范围(FSR)。当阶段被调节时，频率反应的形状保持未改变。

简介：在这份报纸，一个新毫米波浪(公里波浪)波长部门multiplexing(WDM)系统基于radio-over-fiber(ROF)，技术被建议。在这条途径，多波长光来源被supercontinuum(SC)获得技术，和公里波浪信号被使用光外差获得方法。我们试验性地为6-WDM隧道表明光搬运人的产生，由采用光heterodyne技术获得40个GHz公里波浪信号，并且成功地完成在在在G.652纤维的25km的距离上的WDM隧道的2.5Gbit/s的低误差率传动。试验性的结果证实建议答案可行、合算。

简介：Multilayerdielectricthinfilmedgefilterhasseriouspolarizationsensitivityunderobliqueincidence.Thecutoff-bandsofthes-polarizationandp-polarizationlightinconventionaledgefilterwillseparateobviouslyunder45°obliqueincidence,whichlimitsitsapplication.BasedonthetwochosenmaterialsTiO2andSiO2,anovelstackstructureisproposedtodesignthenon-polarizationshort-wave-passthinfilmedgefilter.Byusingthe(4H4L4H)asthematchinglayers,thepolarizationseparationat3dBtransmittanceforthethinfilmedgefiltercutoff-bandislessthan1nmattheincidentangleof45°.Inthisway,thenon-polarizationshort-wave-passedgefilteriseasilydesignedandfabricated.

简介：超声(美国)挥动察觉和声学的排出物(AE)线性地点系统被建议，它作为美国波浪传感器采用纤维布拉格栅栏(FBG)。在理论分析，对纵的美国波浪的FBG传感器反应被调查。当栅栏长度比美国波长短得多时，结果显示FBG波长能作为静态的大小写被调制。标准正弦曲线和锭子波浪测试的试验性的结果与产生信号同意很好。为认识到线性地点也被完成用二FBG推进研究。最大的线性地点错误作为不到5公里被获得。基于FBG的美国波浪传感器和AE线性地点为特定的要求提供有用工具。

简介：Anewmethodisproposedtogeneratemicrowaveandmillimeter-wavebyusingpolarizationscramblerandpolarizationmaintainingfiber(PMF),whichisbasedonthecouplingandtheinteractionbetweenthetwopolarizationsoftheinitialnon-chirpGaussianopticalpulseinPMF.Theexpressionsofthemicrowaveandmillimeter-wavearederivedbycouple-modetheory.Moreover,thefeasibilityisanalyzedsimulatedly.Atlast,0-120GHzmicrowaveandmillimeter-wavecanbeproducedbyadjustingsystemparameterorinputpulseduration.Theprojectisofgreatsimplicity,stabilityandhighexportefficiency.

简介：Thecoupling-waveequationsofphotorefractivewaremixingprocessenin-cludingtwo-andfour-wavemixingareexpressedasanunifiedmatrixequationintheun-depletedpumpapproximation.Thelosslessgeneralsolutionofthematrixequationisob-tained.Thepreviousformulasoffivewave-mixingprocessesintheundepletedpumparederivedfromthesolutionwhentheirboundaryconditionsareused.