简介:BasedontheLordandShulmangeneralizedthermoelasticitytheorywithonerelaxationtime,anisotropicsemi-infiniteplatesubjectedtoamovingheatsourcehasbeenstudiedbyemployingthefiniteelementmethoddirectlyintimedomain,whosedistributionsofnondimensionaltemperature,displacementandstressareillustratedgraphically.Theresultsshowthatthepresentmethodisaneffectiveandexactnumericaloneforsolvingthethermoelasticcouplingproblemandiscapableofovercomingthedefectsoftraditionalintegratedtransformationandinverseintegratedtransformationmethods.Atthesametime,thetemperaturestepofthethermalwavefrontisobtainedexactlyincontrastwithconventionalnumericaltransformationmethods.
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简介:寻求新无限的顺序象soliton一样非线性的进化方程的准确答案(旧姓)由在辅助方程方法上开发建设和机械化的二个特征,秒种椭圆形的方程高度被学习并且新类型答案和B?cklund转变被获得。(2+1)然后,维的碎soliton方程作为一个例子和它的无限的顺序被选象soliton一样准确解决方案在符号的计算系统Mathematica的帮助下被构造,它包括无限的顺序Jacobi椭圆形的类型的光滑的象soliton一样解决方案,Jacobi椭圆形的类型的无限的顺序协议soliton解决方案和指数的函数类型和三角形的功能的无限的顺序山峰soliton解决方案打字。
简介:Thispaperpresentstwokinematicfailuremechanismsofthree-dimensionalrectangularfootingrestingonhomogeneousundrainedclayfoundationunderuniaxialverticalloadinganduniaxialmomentloading.ThefailuremechanismunderverticalloadingcomprisesaplanestrainPrandtl-typemechanismoverthecentralpartofthelongerside,andthesizeofthemechanismgraduallyreducesattheendsofthelongersideandovertheshortersideasthecornerofrectangularfootingisbeingapproachedwherethedirectionofsoilmotionremainsnormaltoeachcorrespondingsiderespectively.Thefailuremechanismundermomentloadingcomprisesaplanestrainscoopslidingmechanismoverthecentralpartofthelongerside,andtheradiusofscoopslidingmechanismincreaseslinearlyattheendsofthelongerside.Onthebasisofthekinematicfailuremechanismsmentionedabove,theverticalultimatebearingcapacityandtheultimatebearingcapacityagainstmomentormomentultimatebearingcapacityareobtainedbyuseofupperboundlimitanalysistheory.Atthesametime,numericalanalysisresults,Skempton'sresultsandSalgadoetal.'sresultsarecomparedwiththisupperboundsolution.Itshowsthatthepresentedfailuremechanismsandplasticlimitanalysispredictionsarevalidated.Inordertoinvestigatethebehaviorsofundrainedclayfoundationbeneaththerectangularfootingsubjectedtothecombinedloadings,numericalanalysisisadoptedbyvirtueofthegeneral-purposeFEMsoftwareABAQUS,wheretheclayisassumedtoobeytheMohr-Coulombyieldingcriterion.ThefailureenvelopeandtheultimatebearingcapacityareachievedbythenumericalanalysisresultswiththevaryingaspectratiosfromlengthLtobreadthBoftherectangularfooting.ThefailuremechanismsofrectangularfootingwhicharesubjectedtothecombinedverticalloadingVandhorizontalloadingH(VerticalloadingVandmomentloadingM,andhorizontalloadingHandmomentloadingMrespectivelyareobservedinthefiniteelementa
简介:-Theturbulencemechanismplaysanimportantpartinthemixingprocessandmomentumtransferofturbulence.Athree-dimensionalPrandtlmixinglengthtidalmodelhasbeendevelopedtosimulatetidalflowsandwaterquality.TheeddyviscositiesanddiffusivitiesarecomputedfromthePrandtlmixinglengthmodel.Inordertomodelthewaterqualityofanestuaryorcoastalareamanyinterdependentprocessesneedtobesimulated.Thesemaybeconvenientlyseparatedintothreemaingroups:transportandmixingprocesses,biochemicalinteractionofwaterqualityvariablesandtheutilizationandre-cyclingofnutrientsbylivingmatter.Themodelsimulatesfulloxygenandnutrientbalance,primaryproductivityandthetransport,reactionmechanismandfateofpollutantsovertidaltime-scales.ThemodelisappliedtonumericalsimulationoftidalflowsandwaterqualityinDalianBay.Themodelhasbeencalibratedagainstalimiteddatasetofhistoricalwaterqualityobservationsandingeneraldemonstra
简介:Bydirectnumericalsimulation,asupersonicboundarylayerwasstudiedtoseewhetherthemechanismforthegenerationofsub-harmonicwaves,similartothosefortheincompressibleflows,existedintheprocessoflaminar-turbulenttransition.Theresultsshowedthatmechanismsofbothresonanttriadandsecondaryinstabilitydidexist.Discussionsweremadeonwhetherthesetwomechanismsarereallyimportantinlaminarturbulenttransition.
简介:一新(2+1)维的格子方程被介绍在联合Toda格子和相对论的Toda格子(TL-RTL)的层次在开始的二个成员之上基于方程在(1+1)尺寸。为联合TL-RTLequations的层次的Darboux转变被构造。在联合TL-RTLequations的层次的开始的二个成员的答案,以及新(2+1)维的格子方程被theDarboux明确地获得转变。
简介:Cross-culturalmanagementisoftenregardedasadisciplineofinternationalmanagementfocusingonculturalencountersbetweentheorganizationandthenation-state,andprovidingtoolstotackleculturaldifl'erencesseenassourcesofconflict,frictionormisunderstanding.BasedonGreetHofstede'sCulturalModel,thispaperattemptstoshedsomelightoneffectivecorporationmanagementthroughculturalanalysisofthedifl'erencesbetweenChinaandwesterncountries.Thepaperputsmoreemphasisontheimpactofculturalcompatibilityoneffectivecorporationman-agementthroughthecasestudyofChina,Japan,GermanyandAmerica.Theauthorarguesthatmanagersandemploy-eesinvolvedincompanieswithdiverseculturalbackgroundsshouldbeintegratedanddevelopedintoaspecificlocalcontextthroughinterlockingtheirculturalidentificationsandtheorganizationalpractices.
简介:Inthispaper,theoceanacousticchannelisconsideredasatime-variantchannel.Inordertoanalysetheconjointtime-shift-fre-quency-delaydistributionorthefadingandspreadstatisticalcharacteristicsofthechannel.TheTDWVS(TwoDimensionalWigner-VilleSpectrum)ofthetime-variantchannelisdefined.TherelationbetweentheWVS(Wigner-VilleSpectrum)oftheinputandtheoutputofthechannelisdiscussedandsomeexamplesforthespecificchannelareshown.Finally,theapplicationsonthedetectionofsignalsinnoiseusingtheWVSandTDWVSaregivenandtheadvantageisobvious,whenthedetectedsignalislinearfrequency-modulationsignal.
简介:ThispaperisdevotedtoacombinedFourierspectral-finitedifferencemethodforsolving3-dimensional,semi-periodiccompressiblefluidflowproblem.Theerrorestimation,aswellastheconvergencerate,ispresented.
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:在现在的纸,包含三个任意的函数为的一个一般解决方案概括(2+1)维的KdV-mKdV方程,它被导出从概括(1+1)维的KdV-mKdV方程,首先借助于Wiess被介绍,小鼓,Carnevale(WTC)截断方法。然后有考虑的几条能量守恒定律的multisymplectic明确的表达被介绍为概括(2+1)维的KdV-mKdV方程基于桥的multisymplectic理论。随后,源于以便以Jacobi椭圆形的功能的合理功能模仿周期的波浪答案一般答案,一个半含蓄的multi-symplectic计划被构造那等价于Preissmann计划。从数字实验的结果,我们能断定multi-symplectic计划能精确地模仿周期的波浪答案概括(2+1)维的KdV-mKdV方程当时近似保存能量守恒定律。
简介:WenumericallyperformedwavedynamicalsimulationsbasedontheMaxwell–Bloch(MB)modelforaquadrupole-deformedmicrocavitylaserwithspatiallyselectivepumping.Wedemonstratetheappearanceofanasymmetriclasingmodewhosespatialpatternviolatesboththex-andy-axesmirrorsymmetriesofthecavity.Dynamicalsimulationsrevealedthatalasingmodeconsistingofaclockwiseorcounterclockwiserotating-wavecomponentisastablestationarysolutionoftheMBmodel.Fromtheresultsofapassive-cavitymodeanalysis,weinterprettheseasymmetricrotating-wavelasingmodesbythelockingoffournearlydegeneratepassive-cavitymodes.Forcomparison,wecarriedoutsimulationsforauniformpumpingcaseandfoundadifferentlockingruleforthenearlydegeneratemodes.Ourresultsdemonstrateanonlineardynamicalmechanismfortheformationofalasingmodethatadjustsitspatterntoapumpedarea.
简介:Takingaccountofturbulenceintensity,non-uniformityofvelocitydistributionattheinitialandsequentsec-tionofhydraulicjumpandfrictionaldragonthefloorwithinjumprange,thispaperderivesnewformulasforcal-culatingtheratioofconjugatedepthsandtheefficiencyofenergydissipationinthetwo-dimensionalfreehydraulicjump.Ithasbeenverifiedbytestdatathatthenewformulasarenotonlyexactintheorybutalsostillbetterinconformitywithpractice.