北京大学信息科学技术概论-Read.PPT《智能信息处理》课程第四讲模糊信息处理技术(4)模糊聚类原理2008年10月17日(星期五3、4节,理教110)1FuzzyClusteringWhat’sclustering?SomeconceptsClusteringAlgorithmsK-meansmethodFuzzyC-means(FCM)clusteringmethodHierarchicalClusteringAlgorithmsMixtureofGaussiansHomework2What’sclustering?Clusteringcanbeconsideredthemostimportantunsupervisedlearningproblem,itdealswithfindingastructureinacollectionofunlabeleddata. anizingobjectsintogroupswhosemembersaresimilarinsomeway. Aclusterisacollectionofobjectswhichare“similar”betweenthemandare“dissimilar”;thesimilaritycriterionisdistance:twoormoreobjectsbelongtothesameclusteriftheyare“close”accordingtoagivendistance(inthiscasegeometricaldistance).Thisiscalleddistance-:[km/h]Weight[kg]SportscarsMediummarketcarsLorries7Terminology100150200250300500100015002000250030003500Topspeed[km/h]Weight[kg]?9TheGoalsofClustering(2)Itcanbeshownthatthereisnoabsolute“best”,itistheuserwhichmustsupplythiscriterion,
北京大学信息科学技术概论-Read 来自淘豆网m.daumloan.com转载请标明出处.
