Real Life Applications of Soft Computing 6

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1、4FuzzyInferenceSystems4.1FuzzySySteMSTheconceptsofsoftcomputingthatweintroducedinChapter1formtheguidingprinciplesoffuzzylogic.Withfuzzylogic,thesystemismadetogivethemostprobableoutputtoanykindofinputbasedonthepredefinedrules.Fuzzysystemsareamodifiedformof

2、rule-basedapproach,inwhichrulesareappliedtofindtheoutputofanyinput.Inplaceofstrictrulesappliedovertheclassesorsets,however,therulesaremuchsofterinthemannerinwhichtheyareapplied.Thisnotonlygivesascopeforthefunctiontoperformwellinthepresenceofuncertaintiesa

3、ndnoise,butitalsomakesitpossibletoobtainmorerealisticsystemsthatimitatenaturalbehavior.Fuzzysystemsareusedinnumerousreallifeindustrialapplications,includingbiomedicalengineeringandroboticcontrol.Thesuccessoffuzzysystemsinsuchvarieddomainsclearlyspeakstoth

4、eeffectivenessofthesesystems,whichformanintegralpartofsoftcomputing.Fuzzylogicisthenaturalchoicewhenmodelingsystemsthathavepredefinedrulesgoverningtheirbehavior.Otherinterestinguseoffuzzysystemsisinclassificationandpatternrecognitionproblems,wheretheyarea

5、bletoeasilydeterminetheoutputclassthattheinputcorrespondsto.Thefuzzynatureofthesesystemsservesasaninstrumentaltoolinfindingtheoutputclassbyasetofrulesthatmaybeframedbylookingatthetrainingdata.Fuzzysystemsgettheirnamefromtheuncertaintyorprobabilitytheyasso

6、ciatewiththevari-ousstagesoffunctioningastheycalculatetheoutputsfromtheappliedinputs.Therulesgoverningthebehaviorofthefuzzysystemarebasedontheclassesofinputs.Theserulessimplydenotethatcertaintypesofinputshaveacertaintypesofoutput.Withfuzzysystems,westudyt

7、heinputsandoutputsingroupsorclasses.Thenovelconceptbehindfuzzysystemsisthatthetheinputbelongstoaclassbyacertaindegreeoracertainprobability.Thisconceptisfurtherusedtoworkovertherulestocomeupwithacertainanswertotheproblem.Theprobability-basedassociationofth

8、efuzzysystemsallowsthemtoimitatevarioussystemsthatcouldnothavebeenbuiltusingtraditionalapproaches.Thesesystemshenceactasaboonintheimplementationoftherule-basedapproachbysoft-computingtechniques.Fuzzysystemsareentire