模糊系統(tǒng)建模的理論和應(yīng)用研究.pdf

1、天津大學(xué)博士學(xué)位論文模糊系統(tǒng)建模的理論和應(yīng)用研究姓名：石明華申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：管理科學(xué)與工程指導(dǎo)教師：李光泉鄭丕鄂1999.11.1AbstractFuzzysystemspresentasingularJanusface：Ontheoneband，theyareknowledgebasedsoftwareenvironmentsconstructedfromacollectionoflinguisticIF—THENrules，

2、andontheotherhand，theyrealizenonlinearmappingswhichhaveinterestingmathematicalpropertieslike“l(fā)owerorderinterpolation”and“universalfunctionapproximation”ThetwoaspectsOCCUrbytighting，respectively，oneortheotherofthetwoJanus

3、faces：interpretabilityorperformance，andaretosomedegreeincompatibleforfuzzysystemmodelingThepopularmethodologiesoffuzzymodelingsuchasneuro—fuzzyalgorithms，geneticalgorithmsandclusteringalgorithmsuseoptimizationmethodsfors

4、elforautomatictuningOfthestructureandparameters，1ikeforinstancethecentersandvariancesofmembershipfunctions：toimprovethebehaviorofthesemodelsonthebasisoftheavailablenumericaldataAlthoughtheyprovidefuzzymodelswiththecapaci

5、tytocompensateformissinghumanknowledge，animportantconsequenceofthishybridizationbetweenthearchitecturalandrepresentationalaspectoffuzzymodelsandthelearningmechanismshasbeentoprogressivelyincreasethecontrastbetweenthetwov

6、isionsOften，theresultingfuzzysystemsdonothaveincommonwiththeoriginalnotionofafuzzysystemowingtothepropertieslikethenon—convexityofortheirregularcrossoverbetweenthemembershipfunctionsHerecomesinaproblemofwhattobethefounda

7、tionoftheoryoftheincompatibilityandhowtotackleitThisdissertationaimsatprovidingananswertotheproblemItsmainpartsareasfollows：Chapter1proposesthemotivationofthethesisandintroducesitscontributionsandorganizationChapter2desc

8、ribesthebasicconceptsoffuzzysystemsandreviewspreviousworkintheliteratureTheinvestigationofthestrongandweakpoints0fexistedfuzzymodelingapproachesleadstotheschemeforourresearchhereChapter3showsthatthefuzzysystemscomposedof