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1.
IntroductionThefastdiffusionequationofdivergenceformasut =(a(u)ux) x b(u) x c(u)   (a( 0 ) = ∞ ) ( 1 )hasimportantphysicalbackground ,suchas [1 ] .Inrecentyears ,someresultsabout ( 1 )havebeenobtained .Forexample ,[2 ] ,[3]respectivelydiscussedtheCauchyproblemsforequation( 1 )andut=(…  相似文献   

2.
1 ProblemintheResearchofToroidImpulsivedifferentialequationisanewimportantbranchofdifferentialequation.In1989,[1],[2]systematicallysummarizedresearchworkaboutimpulsiveordinarydifferentialequations.Inrecentyears,therearemanyliteraturesdealingwiththeoscillatio…  相似文献   

3.
Inthisliterature [1 ] ,[2 ]order 0~ 4isotropicdescartestensor’sexistenceanditsgeneralrepresentationformulaarediscussed .Withregardtoorderk ≥ 5(descartestensororaffineorthogonaltensor) ,thenumber (3 k)ofitscomponentsisverybig ,anditsstructureisverycomplicated ,sonopa…  相似文献   

4.
IntroductionThewell_knownbasisofloopalgebra A1isthath(n) =λn   00 -λn , e(n) =0λn0 0 ,f(n) =0 0λn 0 ,[h(m) ,e(n) ] =2e(m+n) ,[h(m) ,f(n) ] =   -2f(m+n) ,[e(m) ,f(n) ] =h(m+n) .( 1 )Manyequationhierarchieswereobtainedbyestablishinglinearisospectralproblemviatheuseof( 1 ) ,suchasAKNShierarchy ,KNhiera…  相似文献   

5.
IntroductionManystudieshavebeendoneoncontractivemappings,e .g .,Rhoades[1]madeacomparisonofvariousdefinitions (morethan 1 0 0typesvariedfrom 2 5basictypes)ofcontractivemappingoncompletemetricspacein 1 977.Anduptonow ,suchstudyisstillgoingon ,e .g .,[2 ] .Inthispaper,these…  相似文献   

6.
Anomalous dynamics response of nonlinear elastic bar   总被引:1,自引:0,他引:1  
IntroductionInresentyears,thechaoticbehaviorofbeamssubjectedtoperiodicloadbringsmoreandmorescholars’interests.In 1 983 ,FCMoonetal.[1]studiedthechaoticmotionsofbeamsinnonlinearboundaryconditions.In 1 994 ,S .AnanthaRamuandTSSankaretal.[2 ]analyzedbifurcationandCata…  相似文献   

7.
1 TheFlowModelofPower_LawFluidinRadicalFractalReservoirThetransientflowofpower_lawfluidinradicalfractalreservoirisstudiedinRef.[1 ] ,andanalyticalsolutionofLaplacespaceisderived .InRef.[2 ] ,thetransientellipticalflowisresearchedonmodelofexpandingrectangle .T…  相似文献   

8.
IntroductionThesleighproblemisaclassiconeinnonholonomicdynamics.ThesolutionstotheproblemwereobtainedbyС .А .Чаплыгин( 1 898)andC .Carathodory( 1 93 3 ) [1].Thereference [2 ]presentedafewquestionablepointsinthesolutions .Anothersolutionwasofferedinthereference[3 ] .Butthe…  相似文献   

9.
IntroductionInrecentyearsmuchprogresshasbeenmadeonthehigherandinfinitedimensionaldynamicalsystems (see ,e .g .[1 ]~ [1 0 ] ) ,andmainlybasedonreaction_diffusionequations,Kuramoto_SivashinskyequationsNavier_Stokesequations ,etc .Becauseofthefactthattheprincipaloper…  相似文献   

10.
On very rotund banach space   总被引:1,自引:0,他引:1  
IntroductionIn [1 ] ,F .Sullivandefinedtheveryrotundspace ,whichisthedualnotionofverysmoothspace.In [2 ] ,theweaklyexposedpointwasintroduced ,whichisageneralizationofthestronglyexposedpoint.Itisknownthatthereisaclosedconnectionbetweenthestronglyexposedpointsand…  相似文献   

11.
IntroductionThestochasticoptimalcontrolproblemsofreflecteddiffusionprocesseshasbeenconsideredbysomemathematicians,forinstance ,P .L .Lionsin [1 ] ,andJ.L .MenaldiandM .Robinin[2 ] .Inthispaper,wewillconsiderastochasticoptimalcontrolproblemofreflecteddiffusionswit…  相似文献   

12.
Therearemanydocumentsthatdiscussblow_upofthesolutionsfortheinitial_boundaryvlueproblemsofthenonlinearSchr dingerequations,suchaspaper [1 ] .Butthepaper [1 ]hasoneweakpoint,thatis,itcannotunitediscussionforblow_upofthesolutionsfortheinitial_boundaryvalueprobl…  相似文献   

13.
IntroductionIn 1 954,Hu[1,2 ]deducedHu_Washizuprinciplebyso_calledtrial_and_errormethod ,andin1 964 ,Chien[3]systematicallydiscussedtheLagrangemultipliermethod ,bywhichhesuccessfullydeducedHu_Washizuprinciple.Afterthatgeneralizedvariationalprinciplescanbearrivedat…  相似文献   

14.
Probability Inequalities for Sums of Independent Unbounded Random Variables   总被引:2,自引:0,他引:2  
IntroductionLet Yn beasequenceofi.i.d .randomvariablesonaprobabilityspace(Ω ,T ,P)andletSn =∑ni=1Yi.Bennett( 1 962 ) [1]andHoeffding ( 1 963) [2 ]respectivelystudysumsofindependentrandomvariablesandgiveimportantprobabilityinequalitiesundertheconditionwhichYi,1 ≤i≤narebound…  相似文献   

15.
IntroductionDiscreteoperatorwaspushedforwardinpapers [1 ,2 ] ,whichtriedtounifyfiniteelementmethodanddifferencemethodintooneuniformframeandbenefitusforfindingnewmethods.ProfessorLIRong_huaetal.gaveamethod‘generatedifferencemethod’[3,4 ]isakindofinnovationandd…  相似文献   

16.
The effects of blood viscoelasticity on the pulse wave in arteries   总被引:1,自引:1,他引:0  
IntroductionThatthebloodhasviscoelasticpropertiesisawell_knownfact.TheresearchesforthebloodviscoelasticitybyG .B .Thurston[1~4]andS .Chien[5 ]showthatthebloodnotonlyappearstheviscoelasticityinvariousoscillatorybloodflows,butalsohasquitestrongelasticityinsome…  相似文献   

17.
IntroductionAfterTerzaghi,alotofscholarshavedoneoutstandingresearchontheproblemsofone_dimensionalconsolidation .Wilson ( 1974) [1] andBaligh( 1978) [2 ] etal.havestudiedtheconsolidationundertherectangularloading .In 1988,WUetal.[3] workedoutthegeneralsolutionsofone_dimen…  相似文献   

18.
IntroductionWithcomplexityofthedynamicsofthehigher_dimensionaldissipativesystemsolitarywave ,thereismuchdifficultyinstudyingtheseproblems.Thepapers [1 ]~ [3]mentionedthetwo_dimensionalKdVequationsdrivenbyLaxand [3]obtainedtheexistenceofsolutiontotheequations…  相似文献   

19.
IntroductionThestabilityoftheintervalmatrixanduncertainsystemwithtimedelayhavebeenconsideredbyresearchersinthepapers [1 -1 3 ] .Thestabilityandαexponentialstabilityofthefollowingintervaldynamicalsystemwithsingletimedelay x(t) =N[P ,Q]x(t) +N[C ,D]x(t-τ)havebeenconsi…  相似文献   

20.
IntroductionInordertogetridoftherestrictiontodiscreteBabuska_Brezzi’sconditionsinresearchesofmixedfiniteelement (MFE)methods,oneusuallyusesthestabilizedMFEmethodsformat[1] .Thereareanumberofstabilizedmethods (see ,e.g .,Refs.[1- 7]andthereferencestherein) ,whichh…  相似文献   

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