简介：Bysolvingthebasicequationsofmagneticfieldintheanisotropicmagneticmediainwhichthetensorμikissymmetric,anintegralformulaforanisotropicvectorpotentialAisobtained.Bywhichthecharacteristicformulaeforselfandmutualinductancesarederivedinscalarandtensorforms,andtheirtransformationformulaarealsoderived.Finally,theformulaischeckedbypracticalexamples.

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

简介：Ｔｉｍｅ－ｄｏｍａｉｎＷａｖｅＰｒｏｐａｇａｔｉｏｎｉｎＤｉｓｐｅｒｓｉｖｅＭｅｄｉａ①ＪＵＺｈｅｎｌｅ，ＦＵＪｕｎｍｅｉ，ＦＥＮＧＥｎｘｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＭｉｃｒｏｗａｖｅＥｎｇｉｎｅｒｉｎｇ＆ＯｐｔｉｃａｌＣｏｍｍｕｎｉｃａｔｉｏｎＴｅ...

简介：ThispaperproposesanobjectorientedmodelschedulingforparallelcomputinginmediaMultiProcessorsSystemonChip(MPSoC).Firstly,theCoarseGrainDataFlowGraph(CGDFG)parallelprogrammingmodelisusedinthisapproach.Secondly,thisapproachhasthefeatureofunifiedabstractionforsoftwareobjectsimplementinginprocessorandhardwareobjectsimplementinginASICs,easyformappingCGDFGprogrammingonMPSoC.Thisapproachcutsdownthekerneloverheadandreducesthecodesizeeffectively.Theprincipleoftheorientedobjectmodel,themethodofscheduling,andhowtomapaparallelprogrammingthroughCGDFGtotheMPSoCareanalyzedinthisapproach.Thisapproachalsocomparesthecodesizeandexecutioncycleswithconventionalcontrolflowscheduling,andpresentsrespectivemanagementoverheadforoneapplicationinme-dia-SoC.

简介：基于尖光谱方法和散布媒介的圆形的Gaussian分发(CGD)模型，我们数字地模仿通过强烈散布媒介的轻集中。在目标区域的一个高对比焦点被与二进制振幅调整使用反馈优化算法生产。形成在任意的区域与一个焦点或多重foci集中是可能的。紧张的改进因素上的空间轻调整的方形的片断的数字的影响被讨论。模拟结果被发现在对为轻refocusing的理论分析的好同意。

简介：Amethodbasedonmorphologicalgranulometricanalysisforthespeckleimageispresentedtoestimatethescatteringcoefficientofthescatteringmedia.Itisexperimentallydemonstratedthattheaveragegranulometricsize,derivedfromthesuccessiveopeningoperations,isapproximatelyininverseproportiontothescatteringcoefficientofthesampleinabroadillumination.Furthermore,atheoreticalmodelbasedonthespatialcorrelationfunctionofthebackscatteredintensityfortheexperimentalphenomenonisreported.Theanalysisdemonstratesthattheexplicittheoreticalrelationshipbetweenaveragegranulometricsizeofspeckleandscatteringcoefficientisestablished,andthetheoreticalpredictionisconsistentwiththeexperimentalresult.

简介：Theletterproposesathree-layermanageablemediadistributionnetworksystemarchi-tecturecalledMSPnet,whichisbasedonSessionInitiationProtocol[1]andPeertoPeer(SIPP2P)technology.MSPnetperformsapplication-levelstructuredDHTroutingandresourcelocationamongdomainsandunstructuredonesindomain.Exceptformediadistribution,itcanbeusedtosupportavarietyofP2Papplications,includingvideobroadcasting,videoondemand,VoIP,etc.MSPnetiscomposedofthreelayers,namely,thesignalcontrollayer,themanagementlayer,andthemediatransportationlayer.TheMSPnetprototypeconsistsoftheSIPserver,themanagementserver,themediaserver,andthenodeUserAgent(UA).Resultsfromaprototypeexperimentinalarge-scaleInternetenvironmentshowthatMSPnetisfeasible,scalableandmanageable.

简介：Thespectraldensityofthequasi-homogeneous(QH)lighthasbeenknownwhenitscattersonQHmediaorpropagatesinfreespace.ThecasethatQHsourcesaresurroundedbyQHmediaisproposedinthispaper.Undertheparaxialapproximation,thespectraldensityoftheQHlightpropagatingthroughQHmediaisderived.AmodifiedscalinglawforthepropagationoftheQHlightthroughQHmediaisalsoobtained.Thislawalsoholdstrueinthefarfieldbeyondtheparaxialapproximation.

简介：Weintroduceanewmodelofone-dimensional(1D)photoniccrystalcomposedofalternatelyarrangedRHMandLHMlayerswithpositiveandnegativerefractiveindicesrespectively,forwhichthetransmissionspectraofthemodelarecalculatednumericallywiththetransfermatrixmethod,andtheband-gapstructureandthepolarizationpropertiesareanalyzed.Wefoundthattheintroductionofnegativerefractiveindexlayers(i.e.LHMmediumlayers)givesrisetosomepeculiarband-gapstructureandpolarizationpropertiesasfollows.Firstly,theforbiddenbandsareextremelywideandthetransmissionbandsareverysharpwithoutoscillation;andsecondly,thechangeofincidentanglehasdifferentinfluencesontheforbiddenbandsofTEandTMmodes.FortheTMmode,theforbiddenbandwidthdecreasessubstantiallyandfinallyvanishes,andfortheTEmodewithcentralwavelength,thetotalreflectionhappensatanyincidentangle.

简介：Ahigh-performancemeasurementmethodforthearteryintima-mediathickness(IMT)inmedicalultrasoundimagesisproposed.Theschememainlyconsistsoftwoparts.Thefirstpartisthedetectionprocess,includingadaptivegraystretchingforimageenhancing,gradienttransformingtorestraintheover-segmentation,andthewatershedalgorithmforedgeextraction.Theintimacanbedetectedautomaticallyandexactly.Thesecondpart,combinedwithregionalpositioningandboundaryfittingstages,isusedtomeasuretheIMT.Experimentalresultsshowthattheproposedschemecanyieldagoodmeasurementresult,andthecalculationtimecansatisfythepracticalrequirement.

简介：MonteCarlosimulationofthediffusingtemporallightcorrelationinamulti-layeredturbidmediumisconsidered.Astraightforwardformulaisintroducedtocalculateaccuratelyandefficientlytheautocorrelationfunctionatanydetectorposition.Thesimulationresultsareinanexcellentagreementwithananalyticalsolutionofthecorrelationdiffusionequation.

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简介：用毫微秒脉搏，在红外线附近、中间红外线的激光作为泵来源搏动，我们经由四波浪的差别频率混合获得兆兆赫波浪来源。从联合波浪理论，我们详细分析GaSe水晶和碱金属蒸汽的四波浪的混合进程，得到兆兆赫波浪输出力量的分析表达式，并且讨论为完成阶段匹配的条件。由调整泵频率，碱金属蒸汽的第三顺序的非线性的极化是提高回声的。这个节目提供高力量的兆兆赫放射来源的一种新类型。