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95 个结果
  • 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:Afaultdiagnosismodelisproposedbasedonfuzzysupportvectormachine(FSVM)combinedwithfuzzyclustering(FC).Consideringtherelationshipbetweenthesamplepointandnon-selfclass,FCalgorithmisappliedtogeneratefuzzymemberships.Inthealgorithm,sampleweightsbasedonadistributiondensityfunctionofdatapointandgeneticalgorithm(GA)areintroducedtoenhancetheperformanceofFC.Thenamulti-classFSVMwithradialbasisfunctionkernelisestablishedaccordingtodirectedacyclicgraphalgorithm,thepenaltyfactorandkernelparameterofwhichareoptimizedbyGA.Finally,themodelisexecutedformulti-classfaultdiagnosisofrollingelementbearings.Theresultsshowthatthepresentedmodelachieveshighperformancesbothinidentifyingfaulttypesandfaultdegrees.TheperformancecomparisonsofthepresentedmodelwithSVManddistance-basedFSVMfornoisycasedemonstratethecapacityofdealingwithnoiseandgeneralization.

  • 标签: FUZZY support vector machine FUZZY CLUSTERING
  • 简介:这份报纸基于模糊规则建议修改Couzin和速度适应的Couzin结队模型。在模型,代理人在三个感觉地区通过一个fuzzy-rule-based决策计划更新他们的位置。系统的稳定性被保证。模拟证明集中概率和相对收敛尺寸两个都被改进。

  • 标签: 模糊规则 模型基 基础 速度自适应 决策方案 保证系统
  • 简介:InthisstudyanewhybridaggregationoperatornamedasthegeneralizedintuitionisticfuzzyhybridChoquetaveraging(GIFHCA)operatorisdefined.Meantime,somedesirablepropertiesarestudied,andseveralimportantcasesareexamined.Furthermore,wedefinethegeneralizedShapleyGIFHCA(GS-GIFHCA)operator,whichdoesnotonlyoverallconsidertheimportanceofelementsandtheirorderedpositions,butalsogloballyreflectthecorrelationsamongthemandtheirorderedpositions.Inordertosimplifythecomplexityofsolvingafuzzymeasure,wefurtherdefinethegeneralizedλ-ShapleyGIFHCA(GλS-GIFHCA)operator.

  • 标签: 混合聚合 模糊测度 广义 平均 直觉 运算符
  • 简介:这份报纸的主要目标是与用模糊集合理论跟随跳散开的内在的财产在Mertons框架定价欧洲选择。由于真实金融市场的含糊的变化,一般水准跳评价并且跳尺寸不能精确地被记录或收集。这份报纸的主要想法因此是作为一个三角形的模糊数字为率建模并且跳作为模糊随机的变量和使用缩放模糊集合的性质推出位于合理期望平衡价格的原则下面的二个不同跳散开模型。不同于许多传统的模型,欧洲选择价格现在将变成一个模糊数字。这个模型的主要优点之一是它允许投资者在可接受的信仰度下面选择合理欧洲选择价格。实验结果将在建议模型上为改进提供同样有用的反馈信息。

  • 标签: 期权定价模型 欧式期权 模糊环境 随机和 模糊集理论 三角模糊数
  • 简介:在D操作员的概念之上造由Atanassov(1989)介绍了,这篇文章建议一条改进客观途径和一个混血儿来临到operationalizeD以便在intuitionistic的犹豫模糊数字(IFN)能进一步被精制并且描绘。数字实验被执行在文学与存在方法相比表明建议途径的特征和新奇。目的是供应一个有效方法在intuitionistic精制犹豫模糊的为更可靠、充满信心的决定帮助的评价。

  • 标签: 模糊数 直觉 表征 可操作性 模糊评估 运营商
  • 简介:Weconsiderforafixedμ,theclassofpolynomialsPn,μ,s:=P(z)=zsanzn-s+n-s∑j=μan-jzn-j-s;1≤μ≤n-sofdegreen,havingallzerosin|z|≤k,k≤1,withs-foldzerosattheorigin.Inthispaper,wehaveobtainedinequalitiesinthereversedirectionfortheaboveclassofpolynomials.Besides,extensionsofsomeTuran-typeinequalitiesforthepolarderivativeofpolynomialshavebeenconsidered.

  • 标签: 空间 多项式 NS NJS 不等式 原点
  • 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
  • 简介:ThiscriticalreviewassessesEliHinkel’sresearchpaperTheEffectsofEssayTopicsonModalVerbUsesinL1andL2AcademicWritingintermsofbothwritingprocessandwritingproduct.Itacknowledgesthemeritsaswellastheflawsofthepaperandconcludeswithfuturestudysuggestions.

  • 标签: 英语学习 学习方法 阅读知识 阅读材料
  • 简介:Theworldisundergoingconstantandcomplicatedchange.Development,adjustmentandtransformationmakeuptheworld’smainmelody,whilepeaceanddevelopmentarestillthecurrentthemes.Multi-polarizationandeconomicglobalizationcontinuetobecomemoreentrenched,andculturaldiversityandsocialnetworkingacross

  • 标签: 国际关系 电源配置 演变 经济全球化 文化多样性 全球范围
  • 简介:Asymmetricstereoscopicvideocodingcantakeadvantageofbinocularsuppressioninhumanvisionbyrepresentingoneofthetwoviewsinlowerquality.Thispaperproposesabitallocationstrategyforasymmetricstereoscopicvideocoding.Inordertoimprovetheaccuracyofbitallocationandratecontrolintheleftview,aproportionalintegral-derivativecontrollerisadopted.Meanwhile,tocontrolthequalityfluctuationbetweenconsecutiveframesoftheleftview,aqualitycontrollerisadopted.Besides,afuzzycontrollerisproposedtocontrolthevariationinqualitybetweentheleftandrightviewsbycomparingthePSNRdisparityoftwoviewswithafixedthreshold,whichisusedtoquantizethebinocularpsycho-visualredundancyandadjustthequantizationparameter(QP)oftherightviewcorrespondingly.TheproposedalgorithmhasbeenimplementedinH.264/AVCvideocodec,andtheexperimentalresultsshowitseffectivenessinratecontrolwhilekeepingagoodqualityfortheleftview,andfewerbitsareallocatedfortherightviewsothattheoverallbitrateissavedby7.2%atmostwithoutthelossofsubjectivevisualqualityforstereoscopicvideo.

  • 标签: STEREOSCOPIC video BIT ALLOCATION proportional-integral-derivative (PID)
  • 简介:随着高等教育体制改革的深化,高校的思想政治工作内容呈现多样化的特点,辅导员队伍能否切实有效地开展工作,是解决大学生群体问题的关键因素。因此,对于高校辅导员工作考核体系进行研究意义重大,可以通过综合运用层次分析法及模糊评价法对辅导员考核体系进行构建,使辅导员考核体系更加科学合理。

  • 标签: 考核体系 AHP FUZZY
  • 简介:摘要文章提出了政府机关“两型社会消费”评价指标体系及AHP-Fuzzy模型,利用AHP法确定各评价指标的权重,然后分层次进行模糊综合评判,最后综合出总的评价结果。通过对某政府机关的实例分析,表明该模型具有一定的实用性。

  • 标签: 政府机关 两型社会消费 AHP-Fuzzy 指标
  • 简介:UnlikethepreviousresearchworksanalyzingthestabilityoftheT-S(Takagi?Sugeno)fuzzymodel,anextensiononthestabilityconditionofT-Sfuzzysystemswithadifferentstrategyisprovided.Inthestrategyanewvariable,whichisrelativetothegradeoffuzzymembershipfunction,isintroducedtothestabilityanalysisandanewstabilityconclusionisdeduced.Thedefinitionofstabilityconditioninthispaperisdifferentfrompreviousworks,thoughtheyaresimilarinform.Withtheproposedmethod,thesimulationinflightcontrollawshowsabettereffectiveness.

  • 标签: TS模糊模型 稳定性条件 飞行控制律 模糊系统 原理设计 稳定性分析