简介:一个适应neuro模糊的推理系统(ANFIS)被介绍预言横梁的动态行为。轴的力量和大排水量的效果在分析被考虑。为横梁的动态特征的测试的一个数据库从试验性的测试被开发。为单个、多重步的横梁的非线性的颤动力量的回答从有限元素方法被计算(女性),为比较的试验性的测试和neuro模糊的模型。neuro模糊的模型为神经网络和模糊逻辑的联合提供一个一般框架。它与合并真实世界的系统的模糊性质的更多的选择是更灵活的并且是为横梁的动态特征的一个有用评价工具。因此,ANFIS能是为受到轴的负担和大排水量的多重步的横梁的动态行为分析的一个有用工具。
简介:Inroughsettheory,crispand/orfuzzybinaryrelationsplayanimportantroleinbothconstructiveandaxiomaticconsiderationsofvariousgeneralizedroughsets.Thispaperconsiderstheuniquenessproblemofthe(fuzzy)relationinsomegeneralizedroughsetmodel.Ourresultsshowthatbyusingtheaxiomaticapproach,the(fuzzy)relationdeterminedby(fuzzy)approximationoperatorsisuniqueinsome(fuzzy)double-universemodel.
简介:Environmentalriskspertainingtocontaminatedsoilshavebeenwellstudied,whilelittleattentionhasbeenpaidtotherisksofthesoilsafterremediation.Inthisstudy,aconceptmodeldevelopedbasedonfuzzysettheorywasappliedtoevaluatetheuncertaintiesofthreeriskindicators,namely,plantgrowth,groundwatersafetyandhumanhealth,ofarestoredsitethathadbeenpreviouslypollutedbyheavymetals.Theconceptmodelclassifiedthegradeandimportanceofriskfactorsbyan11-levelrankingsystemandwasabletoyieldacomprehensiveriskresultratherthanmulti-riskresultsforcomplexriskindicators.Modelingresultsshowedthattheriskstothethreeindicatorswereeffectivelyreducedaftertheremediation.Moreover,greatsensitivityoftheriskswasfoundrelatedtotheweightdistributionamongthethreeriskindicators.Ingeneral,therisksofbothpollutedandrestoredsoilstotheenvironmentwereintheorderofgroundwatersafety>plantgrowth>humanhealth.Themodelwasprovedtosolvetheproblemsofmulti-riskresultsduetocomplexriskindicatorsthatpreviouslyencounteredbyotherresearchers,whichmadeithelpfulindecision-makingandmanagementofrestoredsoils.
简介:Byreviewingthetraditionalmeasuremethodsoftheintegrationdegreeofthetourismindustry,weconcludedthatmeasuremethodsoftheintegrationdegreeofthetourismindustrycanonlybelimitedtothelevelsoftheoreticalanalysisduetothedefectofthestatisticaldataandthestatisticalstructure.Withthehelpofconceptoffusionfieldandfusionentropyofthetourismindustry,aphysicalmodelofintegrationofthetourismindustryisestablishedandindexsystembasedonAHPisproposed.UsingAHP-fuzzycomprehensiveevaluationmethod,theintegrationdegreeofJiangsuandthecountry’stourismindustryarestudied.Theinfluencingfactorsareanalyzedandthecorrespondingcountermeasuresareproposed.
简介:Regardforthefuzzinessandtherandomnessinsomeacousticfields,amethodforthenumericalanalysisofthe2DacousticfieldwithFuzzy-Randomparameterswasproposedbasedontheequivalentconversionofinformationentropy.Intheproposedmethod,afuzzyrandomacousticfieldwastreatedasapurefuzzyacousticfieldorapurerandomacousticfieldbytransformingallthevariablesintofuzzyvariablesorrandomvariables.Perturbationfiniteelementmethodsforanalyzingthetwo-dimensionalacousticfuzzyandrandomfieldarededuced.Thesoundpressureresponseofa2Dacoustictubeandthe2Dacousticcavityofacarwithfuzzy-randomparameterswereanalyzedbytheproposedmethodandtheMonteCarlomethod,theresultsshowthattheproposedmethodcanbewellappliedtothenumericalanalysisofthe2Dacousticfieldwithfuzzy-randomparameters,andhasgoodprospectofengineeringapplication.
简介:Aimingtoreducethecomputationalcostsandconvergetoglobaloptimum,anovelmethodisproposedtosolvetheoptimizationofacostfunctionintheestimationofdirectionofarrival(DOA).Inthismethod,ageneticalgorithm(GA)andfuzzydiscreteparticleswarmoptimization(FDPSO)areappliedtooptimizethedirectionofarrivalandpowerparametersofthemodesimultaneously.Firstly,theGAalgorithmisappliedtomakethesolutionfallintotheglobalsearching.Secondly,theFDPSOmethodisutilizedtonarrowdownthesearchfield.InFDPSO,achaoticfactorandacrossovermethodareaddedtospeeduptheconvergence.Thisapproachhasbeendemonstratedthroughsomecomputationalsimulations.ItisshownthattheproposedalgorithmcanestimateboththeDOAandthepowersaccurately.Itismoreefficientthansomepresentmethods,suchastheNewton-likealgorithm,Akaikeinformationcritical(AIC),particleswarmoptimization(PSO),andgeneticalgorithmwithparticleswarmoptimization(GA-PSO).