简介:WegivearigorousproofoftheequivalenceofMa’ssupercriticalpotentialandtheminimalactionwithrespecttoanassociatedJacobi-Finslermetric.Asaconsequence,wegiveanexplicitrepresentationoftheweakKAMsolutionsofone-dimensionalmechanicalsystemswithoutthequadraticassumptiononthekineticenergytermoftheHamiltonians,andacriterionoftheintegrabilityresultforsuchasystemofarbitrarydegreeoffreedombytheregularityassumptiononMather’sα-functionisdiscussed.
简介:no state is under obligation to recognize a nationality granted not meeting the requirements of it. In the Nottebohm case,the rules relating to the acquisition of its nationality. It is sometimes asserted that there must be a genuine and effective link between an individual and a state in order to establish a nationality which must be accepted by other states. It is doubtful,International Court of Justice first enunciated this principle and denied Liechtenstein the right to protect Nottebohm.III. Nottebohm case and reviews on the principle of effective nationalityIn the Nottebohm case
简介:Oneoftheopenissuesinprincipleschemedesignofmechanicalsystemsisprinciplerepresentation,whichnotonlyoutliesthephysicalprinciples,butalsofacilitatesthedesignsynthesis.Anenergy-basedapproachtorepresentprincipleschemedesignisproposed.Firstly,anenergyinteractionmodelofmechanicalsystemsisestablishedandanintermediatemodelisderived,inwhichprincipleschemedesignistransformedintosolvingtheenergyfunctionsofsystem.Thentheenergyfunctionsaremodeledwiththelanguageofbondgraphs,andprinciplerepresentationforcomponenytsispresented.Finally,characteristicsofthedevelopedrepresentationapproachareanalyzedandadesignexampleofgatedrivesystemisgiventodemonstratethisapproach.
简介:Therearetwopartsinthispaper.InthefirstpartweconstructtheMarkovchaininrandomenvironment(MCRE),theskewproductMarkovchainandp-θ~→chainfromarandomtransitionmatrixandatwo-dimensionalprobabilitydistribution,andinthesecondpartweprovethattheinvarianceprincipleforp-θ→chain,amorecomplexnon-homogeneousMarkovchain,istrueundersomereasonableconditions.Thisresultismorepowerful.
简介:Problemsofinstabilityofrotatingatmosphericmotionsareinvestigatedbyusingnonlineargoverningequationsandthevariationalprinciple.Themethodsuggestedinthispaperisuniversalforobtainingcriteriaofinstabilityinallmodelswithallpossiblebasicflows.Forexample,themodelcanbebarotropicorbaroclinic,layerorcontinuous,quasi-geostrophicorprimitiveequations;thebasicflowcanbezonalornonzonal,steadyorunsteady.Althoughthebasicflowspossessagreatdealofvariety,theyallarethestationarypointsinthefunctionalspacedeterminedbyanappropriateinvariantfunctional.Thebasicflowisanunsteadyoneiftheconservationofangularmomentumisincludedintheassociatedfunctional.Thesecondvariation,linearornonlinear,givesthecriteriaofinstability.Especially,thegeneralcriteriaofinstabilityforunsteadybasicflow,orographicallydisturbedflowaswellasnongeostrophicflowarefirstobtainedbythemethoddescribedinthispaper.Itisalsosh
简介:Thecooperativeprincipleisanimportanttheoryofpragmatics,concerninghowtomaximallyachievecommunicativegoal.Whiletranslationservesasacommunicativemedium,itshouldalsoobservetheconversationalrules—cooperativeprincipletoachievetheequivalenteffect.Thispapertriestoexploretheissuefromtheperspectiveofcooperativeprinciple.
简介:<正>Geodynamiccompositeeffectprinciplewhichisproducedonthebasisofearthmovementisabasictheoryofmechanics.Itbelongstoanewviewpointandconcept.Comparedwithgravityeffectofgeocentrictheory,anideologicalsystemofmechanicstakingthesunasreferencecoordinateispresentedtoexplaineasilynaturalphenomenaandprob-lemswhichgoagainstgravityeffect:volcano,earthquake,horizontalstress,magmaticactivityandcrustalmovement.Itcanbewidelyusedingeology,mining,engineering,geologicdisaster…Themainconclu-sionanddeductionareasfollows.
简介:基于非平衡热力学理论,最小的精力驱散率原则能从最小的熵被导出生产率原则。最小的熵生产率原则等价于最小的精力驱散率原则。为了验证液体运动追随者最小精力驱散率原则,RNGk骚乱模型和GMO,流动3D当模特儿被使用在笔直地矩形的斜槽模仿液体运动。结果证明那个液体运动满足最小的精力驱散率原则。冲积的河的最小的精力驱散率的有效性与地数据被测试了。当一个河系统以一个相对平衡状态时,它的精力驱散率的价值在最小。最小的值取决于用于河系统的限制。由于一条河的动态性质,然而,最小的价值可以变化与对时间和地点各自。统一溪流力量原则的最小的溪流力量和最小是更一般的最小的精力驱散率原则的特殊、简化的版本。
简介:Amaximumprincipleisprovedforsemilinearstochasticevolutionsystems.Themaincontributionofthisworkisthatinourproblem,theinfinitesimalgeneratorofthesemigroupofthesystemsneednottobeelliptic.ThisgeneralizesaresultofA.Bensoussanin1983.
简介:ThispaperpresentstheparametricvariationalprincipleforPerzynamodelwhichisoneofthemainconstitutiverelationsofviscoplasticity.Theprinciple,bywhichthepotentialenergyfunctionisminimizedunderaconstrainedconditiontransformedbytheconstitutiverelationsofviscoplasticity,isfreefromtheboundofDrucker’spostulateofplasticflowandconsequentlysuitableforsolvingthenonassociatedplasticflowproblems.Furthermore,thepaperhasproventhepresentedprincipleanddiscussedthecreepproblem.
简介:Inthispaper,weintroducedtherandommaterials,geometricalshapes,forceanddisplacementboundaryconditiondirectlyintothefunctionalvariationalformulationsanddevelopedaunifiedrandomvariationalprincipleandfiniteelementmethodwiththesmallparameterperturbationmethod.Numericalexamplesshowedthatthemethodshavetheadvantagesofthesimpleandconvenientprogramimplementation,andareeffectivefortherandommechanicsproblems.