简介：Toanalyzethedynamicmechanismofunusualactivitiesofthesubtropicalhigh,thespace-timevaribleseparationofthepartialdifferentialvortexequationsiscarriedoutwithGalerkinmethodsbasedontheheatforceandthewhirlmovementdissipationeffect.Aimingatthesubjectiveandman-madeconventionalmethodofchoiceinthespacebasisfunctions,weproposetocombinetheempiricalorthogonalfunction(EOF)analysiswiththegeneticalgorithmtoinversethespacebasisfunctionsfromtheactualsequenceoffields.Agroupoftrigonometricfunctionsarechosenasageneralizedspacebasisfunction.Withtheleast-squareserrorofthebasisfunctionandEOFtypicalfields,andwiththecompleteorthogonalityofbasisfunctions,wecangetthedual-boundfunction.Ageneticalgorithmisthenintroducedtocarryoutsurfacefittingandcoeffcientoptimizationofthebasisfunction.Asaresult,theobjectiveandreasonableconstantdifferentialequationofthesubtropicalhighisobtainedbyinversion.Finally,basedontheobtainednonlineardynamicsmodel,thedynamicbehaviorandmechanismofthesubtropicalhighisanalyzedanddiscussedundertheinfluenceofheatforce.Wefindthatsolarradiationandzonaldifferencesinlandandseaareimportantfactorsimpactingthepotentialfieldandflowfieldchangesofthesubtropicalareas.Thesefactorsleadtostrengthchangesofthesubtropicalhighandmedium-termadvance/retreatactivities.Theformerisagradualchange,whilethelattershowsmorebreakcharacteristics.Meaningfulresultsareobtainedintheanalysis.

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