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1.
IntroductionOfallthefiber_reinforcedcompositematerials,theshort_fibercompositematerialnotonlystrengthensthematrixbutavoidsdefectionsofthelong_fibercompositematerialaswell.Themicro_mechanicsaboutitsuchasfracture ,fatigueanddamageisverycomplex .Intheprevi… 相似文献
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IntroductionMostofthefiniteelementsareconstructedbyusingdisplacementfiniteelementmethod .Bysupposingthedisplacementfunctionsintheelement,andusingtheprincipleofminimumpotentialenergy,theelementstiffnessmatrixcanbeformulated .Ifthedisplacementfunctioninth… 相似文献
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IntroductionSinceDienes(1979),NagtegalandDeJong(1982)etalhadocasionalyfoundthephenomenaofsimpleshearoscilationusingthegeneral... 相似文献
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IntroductionFractalinterpolationmethodisnumericalmethodinthefractalgeometryusingiteratedfunctionsystem (IFS) ,itisdifferentfromtraditionalinterpolationmethod .M .F .Barnsely[1,2 ]firstgavethismethodandresearchedthecontinuityandthefractaldimensionofinterpolat… 相似文献
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IntroductionIntheactivitiessuchastheaerospaceengineeringheatprotection[1,2 ],thelarge_scaleconcretepouring ,thechemicalproduction ,thepowdermetallurgyandthefiresafetyengineering[3,4],thereisonekindofnonlinearparabolicdistributedparametercontrolsystemwithmovi… 相似文献
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IntroductionU_shapedbellowsareusuallyseeninthepipelinesystem (Fig .1) ,whichareusedtocompensatefortheaxialmovement,therotationandthedeflectionofthepipelinesduetothethermalaction ,thebaseunequalsettlementsandtheinstallationerrors.Theaxisymmetricaldeformatio… 相似文献
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IntroductionSincethepioneeringworkonnonlinearstabilityofplanarincompressiblesteadyflowbyArnol’d ,agreatdealofattentionhasbeenpaidtononlinearstabilityoffluid (especiallygeophysicalfluid)motion ,andmuchprogresshasbeenmade.AsmentionedinRef.[1 ] ,intherealatmos… 相似文献
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IntroductionConsiderthesystemofpartialdifferentialalgebraicequations (PDAEs) :Σ : Pi(y1,y2 ,… ,yn) =0 (i =1,2 ,… ,r) ,wherethecoefficientsareinthedifferentialfieldKwithcharacteristiczero .TheimportantquestionishowtosolvethisPDAEsinthetheoryofpartialdifferentialequa… 相似文献
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IntroductionFermi,PastaandUlam[1]presentedawell_knownproblemwhysolidshadfiniteheatconductivity ,whichwascalledtheFermi_Pasta_Ulam(FPU)problem .Thesolidismodelledbyaone_dimensionallattice ,asetofmassescoupledbystring .Theequationsgoverningthedynamicsofthisla… 相似文献
10.
陈松林 《应用数学和力学(英文版)》2002,23(5):618-618
ThefollowingLemmastated (in :AppliedMathematicsandMechanics (EnglishEdition) ,2 0 0 1 ,2 2 ( 1 1 ) :1 3 52 -1 3 56)wasappliedtodescribetheasymptoticbehaviorsofsolutionsofaclassofreaction_diffusionequation .Onaccountofthespecialpropertyofthesupersolution(i.e .,anonzerosolution… 相似文献
11.
齐朝晖 《应用数学和力学(英文版)》2002,23(2):187-193
IntroductionManymechanicalsystemscanbeviewedaslinearHamiltoniansystems.Whenwestudytheeffectsofsystemparametersonthebehaviorofthesystems,thesystemcanberegardedasthesystemdependingonparameters.Veryimportantsystemparameters ,suchascriticalload ,criticalang… 相似文献
12.
黄再兴 《应用数学和力学(英文版)》1999,(7)
IntroductionAsageneralizationoftheclasicalfieldtheory,nonlocalfieldtheorycanbeusedasthetheoreticalbaseinmacro_micromechanicsb... 相似文献
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IntroductionSincethespecialsuperiorityofartificialneuralnetworkstechnologyinvariousengineeringtechniquesfields,suchasoptimization ,associativememories,patternrecognition ,signalprocessingandautomaticcontrol,therehasbeenincreasinginterestintheinvestigati… 相似文献
14.
STUDY FOR THE BIFURCATION TOPOLOGICAL STRUCTURE AND THE GLOBAL COMPLICATED CHARACTER OF A KIND OF NONLINEAR FINANCE SYSTEM(Ⅱ) 总被引:1,自引:0,他引:1
IntroductionChaoticistheinherentrandomnessinthedefinitesystem .Thedefinitenessiscausedbythesysteminternalsbutnotbytheexternaldisturbance,whiletheinherentrandomnessistheirregularanddifficult_to_be_predictedbehaviorofthesystem .Whatismostattractiveofthec… 相似文献
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IntroductionEversinceShepherdhassuggestedanovelmethodtostudynonlinearsaturationofbarotropicandbaroclinicinstability[1- 3],manyauthorshavemadefurtherresearchontheproblem .Shepherd’smethodisasfollows:First,chooseaclassofstablebasicflows;then ,decomposethedist… 相似文献
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IntroductionForcomputationoftheviscouscompressibleflowstheNavier_Stokesequationsaregenerallyrepresentedintheconservationlawformasahyperbolicsystem .Lackingthemathematicaltooltoanalyzethisnonlinearsystem ,thenumericalmethodsusedinsolvingthenonlinearhype… 相似文献
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IntroductionBeltramiflowisaspecialkindofflow .Itsvorticitydirectionisparalleltoitsvelocitydirectioneverywhere .Moreover,itsvelocityandvorticitysatisfythelinearHelmholtzequation .Infact,itisakindofrelativelysimpleflow .Buttherearemanycomplexphenomenahidden… 相似文献
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STUDY FOR THE BIFURCATION TOPOLOGICAL STRUCTURE AND THE GLOBAL COMPLICATED CHARACTER OF A KIND OF NONLINEAR FINANCE SYSTEM(Ⅰ) 总被引:1,自引:0,他引:1
IntroductionChaoticistheinherentrandomnessinthedefinitesystem .Thedefinitenessiscausedbythesysteminternalsbutnotbytheexternaldisturbance[1- 4],whiletheinherentrandomnessistheirregularanddifficult_to_be_predictedbehaviorofthesystem[5 ,6 ].Whatismostattractive… 相似文献
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IntroductionInrecentyearsaremarkabledevelopmenthastakenplaceinthestudyofnonlinearevolutionarypartialdifferentialequations.Anexampleisthe“Good”Boussinesq (G .B .)equationutt =-uxxxx+uxx+ (u2 ) xx ( 1 )whichdescribesshallowwaterwavespropagatinginbothdirections.Thea… 相似文献
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IntroductionBecauseoftherequirementofc1continuity ,itisverydifficulttoconstructconformingKirchhoffplatebendingelements.Inordertoovercomethedifficulty ,manyapproacheshavebeenpresented .Intheseapproaches,therequirementofc1isreleasedonconditionoftheconvergen… 相似文献