简介：Wavepropagationanalysisforafunctionallygradednanobeamwithrectangularcross-sectionrestingonvisco-Pasternak'sfoundationisstudiedinthispaper.Timoshenko'sbeammodelandnonlocalelasticitytheoryareemployedforformulationoftheproblem.TheequationsofmotionarederivedusingHamilton'sprincipalsbycalculatingkineticenergy,strainenergyandworkduetoviscoelasticfoundation.Theeffectsofvariousparameterssuchaswavenumber,non-homogeneousindex,nonlocalparameterandthreeparametersoffoundationareperformedonthephasevelocityofthenanobeam.Theobtainedresultsindicatethatsomeparameterssuchasnon-homogeneousindex,nonlocalparameterandwavenumberhavesignificanteffectontheresponseofthesystem.

简介：在电子上控告的喷气的非线性的不稳定性用描述一口液体喷气拉长并且变瘦的管理电镀物品水动力学方程被学习。到空间和时间演变骚乱的一个喷气流动系统题目被考虑。在线性阶段，瑞利和进行的喷气流动不稳定性模式被揭开。在流动的非线性的不稳定性经由三个一组被探索揭开的反响的波浪fa-vorable操作模式不以前在这个问题的线性学习检测了。特别地，喷气半径显著地被减少，并且喷气的电场在非线性的学习下面是适当地面向的。考虑回声三个一组模式提供对由于正切的电场效果拉长并且变瘦的一口喷气的更好数学的描述，这被发现。在喷气流动系统的线性、非线性的不稳定性结果被介绍并且讨论。

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简介：Withtheadventofleft-handedmagneticmaterials,itisdesirabletodevelophigh-performancewavedevicesbasedontheirnovelpropertiesofwavepropagation.Thisletterreportsthespecialpropertiesofelasticwavepropagationinmagnetoelasticmultilayeredcompositeswithnegativepermeabilityascomparecdtothoseincounterpartstructureswithpositlvepermeability.Thesenovelpropertiesofelasticwavesarediscernedfromthediversifieddispersioncurves,whichrepresentthepropagationandattenuationcharacteristicsofelasticwaves.Tocomputethesedispersioncurves,themethodofreverberation-raymatrixisextendedfortheanalysisofelasticwavesinmagnctoelasticmultilayeredcomposites.Althoughonlytheresultsofasinglepiezomagneticandabinarymagnetoelasticlayerswithmechanicallyfreeandmagneticallyshortsurfacesaswellaspelrfectinterfaceareillustratedinthenumericalexamples,theanalysisisapplicablelomagnetoelasticmultilayeredstructureswithotherkindsofboundaries/interfaces.

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简介：有33.2的一个事件角度的一个倾斜的冲击波上的直接数字的模拟(DNS)??鮼诧?髧??闧花??軦??蒚?龋?华??鮼??軥鮊鷥?????鮼裥?????????????????????鮼??????が?鮼

简介：Whendesigningawavepowerplant,reliableandfastsimulationtoolsarerequired.Computationalfluiddynamics(CFD)softwareprovideshighaccuracybutwithaveryhighcomputationalcost,andinoperational,moderateseastates,linearpotentialflowtheoriesmaybesufficienttomodelthehydrodynamics.Inthispaper,amodelisbuiltinCOMSOLMultiphysicstosolveforthehydrodynamicparametersofapoint-absorbingwaveenergydevice.TheresultsarecomparedwithalinearmodelwherethehydrodynamicalparametersarecomputedusingWAMIT,andtoexperimentalresultsfromtheLysekilresearchsite.Theagreementwithexperimentaldataisgoodforbothnumericalmodels.

简介：Becausemostpiezoelectricdeviceshaveinterfaceswithfluidinengineering,itisvaluabletostudythecoupledfieldbetweenfluidandpiezoelectricmedia.Asthefundamentalproblem,the3DGreen'sfunctionsforpointforcesandpointchargeloadedinthefluidandpiezoelectricbimaterialsarestudiedinthispaper.Basedonthe3Dgeneralsolutionsexpressedbyharmonicfunctions,weconstructedthesuitableharmonicfunctionswithundeterminedconstantsatfirst.Then,thecouplefieldinthefluidandpiezoelectricbimaterialscanbederivedbysubstitutionofharmonicfunctionsintogeneralsolutions.Theseconstantscanbeobtainedbyvirtueofthecompatibility,boundary,andequilibriumconditions.Atlast,thecharacteristicsoftheelectromechanicalcoupledfieldsareshownbynumericalresults.

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