简介：在这份报纸，我们以可变健全速度在photoacoustic断层摄影术调查伴随方程，并且建议三个变化反复的算法。这些算法的基本想法是反复地计算原来的方程和伴随方程。我们现在的数字例子和表演这些变化反复的算法的井表演。[从作者抽象]

简介：Acoupled-modesoundpropagationmodelwithcomplexeffectivedepthispresented,inordertoinvolvetheeffectofbranchlineintegralforacousticfieldinarange-dependentwaveguide.Theequationsofmotionandcontinuityareusedtoobtainthecoupledequations,whichsatisfyboundaryconditionsinthewaveguidewithvaryingtopographyandcontainonecouplingmatrix.Meanwhile,thecouplingsbetweendiscreteandcontinuousspectrumaredealtwithbasedoncomplexeffectivedepththeory.Numericalsimulationsshowthattheaccuracyoftransmissionlossisimprovedbythecoupledmodemodelwheneigenvaluesoftrappedmodesarelocatednearthebranchpoint.Theacousticfieldinanon-horizontallystratifiedwaveguidecanbecalculatedefficientlyandaccuratelybythismodel,andtheenergycorrespondingtotrappedmodes,leakymodesandbranchlineintegralcanbeconsideredadequately.

简介：Thereciprocitymeasurementtheoryinanomalousreverberantsoundfieldswasinvestigated.AnimprovedmethodWasproposedduetotheinterrelatederrors.ThesourcevolumevelocityWascorrectedbyspatialaverageofmeasurementresultsandevaluationofthereverberantsoundfieldinfluenceonacousticenergydensity.Theresultwasvalidatedinunderwaterexperiment,correctedreciprocitymeasurementresultswerealmostthesameasdirectmeasurementresults.Itindicatesthatreverberantsoundfielddoesnotaffectthevaliditvoftheprinciple,butinfluencestheobtainmentofsourcevolumevelocity,theninfluencesthemeasurementoftransferfunctionswiththeprinciple.Theproposedmethodissimpleandeffectiveinanomalousreverberantsoundfields.Thestudymavbevaluablefortheapplicationswhicharebasedontheprinciple.

简介：一个一般理论模型被开发在点刺激力量下面从一个无限的直角地使硬的盘子调查健全放射。板能金属性或合成，并且装载的液体也在研究被考虑。第一份订单砍变丑理论被用来说明横向砍变丑。运动同等地，spacedstiffeners被考虑他们的弯曲颤动和扭力的运动检验。基于周期的结构理论和板的相等的动态灵活性的概念，模型的概括vibro声学的方程被使用Fourier变换方法获得。能数字地被解决的概括模型被把模型预言与存在结果作比较验证。数字计算被执行在直角地使硬的板的健全放射特征上调查刺激，stiffeners的间距，板厚度，加强的形式和纤维取向的地点的效果，并且一些实际结论从这些参数研究被得出。

简介：<正>FoundedonSeptember19,2012inBeijing,WorldTourismCitiesFederation(WTCF)isanon-profit,non-governmentalinternationalmassorganization.TheestablishmentofWTCFwasproposedbyBeijingandorganizedvoluntarilybytouristcitiesofallcountriesandregions,non-governmentalorganizations,associationsandenterprisesrelatedtotourism.Underthethemeof"TourismMakesCity

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