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50 个结果
  • 简介:Thispaperpresentsanewfuzzymultiplecriteria(bothqualitativeandquantitative)decision-making(MCDM)methodbasedonfuzzyrelationaldegreeanalysis.Theconceptsoffuzzysettheoryareusedtoconstructaweightedsuitabilitydecisionmatrixtoevaluatetheweightedsuitabilityofdifferentalternativesversusvariouscriteria.Thepositiveidealsolutionandnegativeidealsolutionarethenobtainedbyusingamethodofrankingfuzzynumbers,andthefuzzyrelationaldegreesofdifferentalternativesversuspositiveidealsolutionandnegativeidealsolutionarecalculatedbyusingtheproposedarithmetic.Finally,therelativerelationaldegreesofvariousalternativesversuspositiveidealsolutionarerankedtodeterminethebestalternative.Anumericalexampleisprovidedtoillustratetheproposedmethodattheendofthispaper.

  • 标签: FUZZY MCDM Trapezoidal FUZZY numbers FUZZY
  • 简介:FuzzyIntervalValueLogicandFuzzyDistrbutedValueLogicTXFuzzyIntervalValueLogicandFuzzyDistributedValueLogicHeXinguiBeijingInstit...

  • 标签: : FUZZY LOGIC FUZZY INTERVAL VALUE
  • 简介:Syllogisticfuzzyreasoningisintroducedintofuzzysystem,andthenewCascadedFuzzySystem(CFS)ispresented.ThethoroughlytheoreticalanalysisandexperimentalresultsshowthatsyllogisticfuzzyreasoningismorerobustthanallotherimplicationinferencesfornoisedataandthatCFShasbetterrobustnessthanconventionalfuzzysystems,whichprovidethesolidfoundationforCFS'spotentialapplicationinfuzzycontrolandmodelingandsoon.

  • 标签: 模糊系统 三段论模糊推理 稳健性 级联 CFS
  • 简介:Thispaperproposesanewneuralfuzzyinferencesystemthatmainlyconsistsoffourparts.Thefirstpartisabouthowtouseneuralnetworktoexpresstherelationwithinafuzzyrule.Thesecondpartisthesimplificationofthefirstpart,andexperimentsshowthatthesesimplificationswork.Onthecontrarytothesecondpart,thethirdpartistheenhancementofthefirstpartanditcanbeusedwhenthefirstpartcannotworkverywellinthefuzzyinferencealgorithm,whichwouldbeintroducedinthefourthpart.Finally,thefourthpart"neuralfuzzyinferencealgorithm"isbeenintroduced.Itcaninferencethenewmembershipfunctionoftheoutputbasedonpreviousfuzzyrules.Theaccuracyofthefuzzyinferencealgorithmisdependentonneuralnetworkgeneralizationability.Evenifthegeneralizationabilityoftheneuralnetworkweusedisgood,westillgetinaccurateresultssincethenewcomingrulemaynotberelatedtoanyofthepreviousrules.Experimentsshowthisalgorithmissuccessfulinsituationswhichsatisfytheseconditions.

  • 标签: 神经模糊推理系统 模糊推理算法 神经网络 模糊规则 泛化能力 输出功能
  • 简介:Ahybridapproachforfuzzysystemdesignbasedonclusteringandakindofneurofuzzynetworksisproposed.Anunsupervisedclusteringtechniqueisfirstlyusedtodeterminethenumberofif-thenfuzzyrulesandgenerateaninitialfuzzyrulebasefromthegiveninput-outputdata.Then,aclassofneurofuzzynetworksisconstructedanditsweightsaretunedsothattheobtainedfuzzyrulebasehasahighaccuracy.Finally,twoexamplesoffunctionapproximationproblemsaregiventoillustratetheeffectivenessoftheproposedapproach.

  • 标签: 模糊系统 模糊规则 聚类 模糊神经网络 混合逼近
  • 简介:Dempster-Shaferevidencetheory(DStheory)iswidelyusedinbrainmagneticresonanceimaging(MRI)segmentation,duetoitsefficientcombinationoftheevidencefromdifferentsources.Inthispaper,animprovedMRIsegmentationmethod,whichisbasedonfuzzyc-means(FCM)andDStheory,isproposed.Firstly,theaveragefusionmethodisusedtoreducetheuncertaintyandtheconflictinformationinthepictures.Then,theneighborhoodinformationandthedifferentinfluencesofspatiallocationofneighborhoodpixelsaretakenintoconsiderationtohandlethespatialinformation.Finally,thesegmentationandthesensordatafusionareachievedbyusingtheDStheory.ThesimulatedimagesandtheMRIimagesillustratethatourproposedmethodismoreeffectiveinimagesegmentation.

  • 标签: AVERAGE fusion spatial information DEMPSTER-SHAFER evidence
  • 简介:特征选择(FS)指选择给定的outcome.Unlike是很预兆的那些输入属性的过程另外的维减小方法,在FS的reduction.The好处是双重的以后,特征选购者保存特征的原来的意思:它更加减少正式就职算法的跑的时间,并且增加在用模糊逻辑和模糊逻辑的乳房X线照片分类的FS过程基于的产生model.This纸分析的精确性Quickreduct算法被申请从特征的FS提取了使用在乳房X线照片region.The上构造的灰色的水平co-occurence矩阵(GLCM)预兆的精确性特征用NaiveBayes,Ripper,C4.5,和蚂蚁矿工algo被测试

  • 标签: 模糊逻辑算法 粗糙集理论 X光检查 特征选择 乳房 分类
  • 简介:Amongtheavailableclusteringalgorithmsindatamining,theCLOPEalgorithmattractsmuchmoreattentionwithitshighspeedandgoodperformance.However,theproperchoiceofsomeparametersintheCLOPEalgorithmdirectlyaffectsthevalidityoftheclusteringresults,whichisstillanopenissue.Forthispurpose,thispaperproposesafuzzyCLOPEalgorithm,andpresentsamethodfortheoptimalparameterchoicebydefiningamodifiedpartitionfuzzydegreeasaclusteringvalidityfunction.TheexperimentalresultswithrealdatasetillustratetheeffectivenessoftheproposedfuzzyCLOPEalgorithmandoptimalparameterchoicemethodbasedonthemodifiedpartitionfuzzydegree.

  • 标签: 数据采集 聚类分析 有效性 参数选择 模糊算法
  • 简介:ThesecondaryusageofspectrumhasbeeninvestigatedinCognitiveRadio(CR)networktoresolvingthespectrumscarcityissueinwirelesscommunication.WhenPrimaryUsers(PU)whoownthespectrumappear,spectrumhandoffisneededtomaintainthecommunicationsofSecondaryUsers.ButthedecisionmakingofspectrumhandoffisachallengeissueforCRnetwork,becausetheinputofdecisionmaking,whichobtainthroughspectrumsensing,isheterogeneousandinexact.Inthispaperwewillusefuzzylogiccontroltheorytosolvethisissueandmakeuseofnewinformationforhandoffoperation:theprobabilityofPU'soccupancyatacertainchannel.Ournewalgorithmcanmakemoreintelligentdecisioncomparedtosimpletraditionalspectrumhandoffdecisionmakingandreducetheprobabilityofspectrumhandoff,alsotheperformanceofSU'scommunicationcanbeenhanced.

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  • 简介:古典不平的集合在模糊决定桌子有一个有限处理能力。有古典不平的集合的联合模糊集合,模糊决定桌子上的属性减小算法被学习。首先,新类似度和新类似范畴被定义。同时,被条件属性划分的类似范畴簇当时是provided.And,二条定理被介绍。随后,一个新属性减小算法被建议。最后,新属性减小算法通过自行修整的飞行控制系统的一张表演评估决定桌子被验证。结果证明建议属性减小算法能处理模糊决定桌子到某个程度。

  • 标签: 属性约简算法 模糊决策表 飞行控制系统 相似程度 自我修复 绩效评价
  • 简介:Torealizetheon-linemeasurementandmakeanalysisonthedensityofalgaeandtheirclusterdistribution,thefluorescentdetectionandfuzzypatternrecognitiontechniquesareused.Theprincipleoffluorescentfiber-opticdetectionisgivenaswellasthemethodoffuzzyfeatureextractionusingaclassofneuralnetwork.

  • 标签: 海藻 赤潮 海洋污染 发光光纤检波 模糊模式识别
  • 简介:AFuzzyReasoningSystemandItsHeuristicInferenceAlgorithmZuoXiaode&LiangYunDept.ofBusinesAdministration,JinanUniversity,Guangzho...

  • 标签: FUZZY REASONING SYSTEM HEURISTIC INFERENCE algorithm.
  • 简介:Thispaperproposedafuzzifyfunctorasanextensionoftheconceptoffuzzysets.Thefuzzifyfunctorandthefirst-orderoperatedfuzzysetaredefined.Fromthetheoryanalysis,itcanbeobservedthatwhenthefuzzifyfunctoractsonasimplecrispset,wegetthefirstorderfuzzysetortype-1fuzzyset.Byoperatingthefuzzifyfunctoronfuzzysets,wegetthehigherorderfuzzysetsorhighertypefuzzysetsandtheirmembershipfunctions.Usingthefuzzifyfunctorwecanexactlydescribethetype-1fuzz...

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  • 简介:因为表示每份object.In订单解决这个问题使用明确的形式,古典不平的集合不能在决定过程显示出模糊和目标的重要性,这份报纸第一介绍每个目标在有会员度显示出它的模糊的一张特殊决定桌子并且被分配了重量在决定procedure.Then显示出它的重要性,特殊决定桌子被学习,同时,相关不平的集合模型被提供相关definitio

  • 标签: 决策表粗糙集 粗糙集模型 模糊性 属性约简算法 加权 决策过程
  • 简介:FuzzyEntropyBasedCombinedLearningAlgorithmforNeuralNetworks¥MinYao(Dept.ofComputerScience,HangzhouUniversity,Hangzhou310028,P...

  • 标签: Artificial NEURAL networks COMBINED learning Fuzzy
  • 简介:Thispaperpresentsaweb-basedsystemtopredicttheelectricityprices.Theproposedsystemcapturesthegeographicallocation,weatherforecast,andoilpriceforoneweekahead.Thecapturedparametersarefedtoafuzzy-logic-basedalgorithmtocalculateelectricenergyprices.Basedonpredictedelectricityprices,consumerscanturnON/OFForrescheduleoperationsoftheirhomeappliancestoreducetheirelectricitybill.Theproposedalgorithmwasdevelopedandhostedinautilityserver(U-server).Ontheconsumerside,ahomegateway(H-gateway),andamonitoringandcontrolsystemwasdesigned,built,andtestedbyusingasinglechipmicrocontroller.

  • 标签: ELECTRICITY TARIFF fuzzy LOGIC home AUTOMATION
  • 简介:Makingfulluseofwindpowerisoneofthemainpurposesofthewindturbinegeneratorcontrol.Conventionalhillclimbingsearch(HCS)methodcanrealizethemaximumpowerpointtracking(MPPT).However,thestepsizeofHCSmethodisconstantsothatitcannotconsiderbothsteady-stateresponseanddynamicresponse.Afuzzylogicalcontrol(FLC)algorithmisproposedtosolvethisprobleminthispaper,whichcantrackthemaximumpowerpoint(MPP)quicklyandsmoothly.ToevaluateMPPTalgorithms,fourperformanceindicesarealsoproposedinthispaper.Theyaretheenergycapturedbywindturbine,themaximumpower-pointtrackingtimewhenwindspeedchangesslowly,thefluctuationmagnitudeofrealpowerduringsteadystate,andtheenergycapturedbywindturbinewhenwindspeedchangesfast.ThreecasesaredesignedandsimulatedinMATLAB/Simulinkrespectively.ThecomparisonofthethreeMPPTstrategiesconcludesthattheproposedfuzzylogicalcontrolalgorithmismoresuperiortotheconventionalHCSalgorithms.

  • 标签: 模糊逻辑控制算法 风力发电系统 MPPT 控制策略 PMSG 最大功率点跟踪