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1、中国石油大学(北京)本科毕业设计第20页文献翻译原文EvolutionofFuzzyControllersandApplicationsD.K.PratiharandN.B.Hui:EvolutionofFuzzyControllersandApplications,StudiesinComputationalIntelligence(SCI)66,47–69(2007)SummaryThepresentchapterdealswiththeissuesrelatedtotheevolutionofoptimalfuzzylogiccontrollers(FLC)byproper
2、tuningofitsknowledgebase(KB),usingdifferenttools,suchasleast-squaretechniques,geneticalgorithms,backpropagation(steepestdescent)algorithm,ant-colonyoptimization,reinforcementlearning,Tabusearch,Taguchimethodandsimulatedannealing.TheselectionofaparticulartoolfortheevolutionoftheFLC,generallyde
3、pendsontheapplication.Someoftheapplicationshavealsobeenincludedinthischapter.Keywords:Fuzzylogiccontroller,Evolution,Least-squaretechnique,Genetic-fuzzysystem,Neural-fuzzysystem,Ant-colonyoptimization,Reinforcementlearning,Tabusearch,Taguchimethod,Simulatedannealing1IntroductionReal-worldprob
4、lemsaregenerallyassociatedwithdifferenttypesofuncertainties.Inthepast,considerableefforthasbeenmadetomodeltheseuncertainties.Priorto1965,itwasconsideredthatprobabilitytheoryworkingbasedonAristoteliantwo-valuedlogicwasthesoleagentavailabletodealwithuncertainties.Thisparticularlogicusestheconce
5、ptoftheclassicalcrispset.Thatisasetwithafixedboundary.Prof.Zadehdevelopedtheconceptoffuzzysets,intheyear1965[1].Thosearethesetshavingthevagueboundaries.Hearguedthatprobabilitytheorycanhandleonlyoneoutofseveraldifferenttypesofpossibleuncertainties.Thus,thereareuncertainties,whichcannotbedealtw
6、ithbyusingtheprobabilitytheory.Takinganexample,inwhichMr.XrequestsMr.Y,tobringsomeredapplesforhimfromthemarket.Therearetwouncertaintiesatleast,whichrelatetothefollowing:(i)theavailabilityoftheapples,and(ii)aguaranteethattheappleisred.Dependingontheseason,thereisaprobabilityofobtainingthe中国石油大
7、学(北京)本科毕业设计第20页apples,whichvariesbetween0and1.But,thecolour–redcannotbedefinedbytheclassicalset.Itisnotbetweenred(1)andnot-red(0).Inthefuzzyset,thecolour–redcanbedefinedasfollows(Fig.3.1)usingtheconceptofmembershipofanelementtoaclass.Thatisth
