Chen Dewang． Classification of traffic flow situation of urban freeways based on fuzzy clustering [J]． Journal of Transportation Systems Engineering and Information Technology，2005，5 ( 1) : 62-67．
Wang Xuan，Weng Xiaoxiong． Classification of three-phase traffic flow of urban expressway based on fuzzy C-means clustering[J]．Journal of Transport Information and Safety，2009，27 ( 1) : 149-152．
Wang Jiangfeng，Gao Feng． A fuzzy logic method applied in the identification of expressway traffic state[C]/ /Tongji Transport Forum-Conference Proceedings of Urban Transportation Systems Design． Shanghai: Tongji University，2004: 63-69．
Zhang Xiaoliang，Zhang Ke，Liu Hao，et al． Identification of urban expressway traffic state based on FCM-Ｒough sets [J]． Systems Engineering，2010，28( 8) : 75-80．
[13]
Bezdek J C． Pattern Ｒecognition with Fuzzy Objective Function Algorithms[M]． New York: Plenum Press，1981．
Dou Huili，Wang Guohua． Algorithm of traffic state extraction based on fuzzy clustering and discriminant analysis [J]． Journal of Transport Information and Safety，2010，28( 2) : 13-15．
[18]
Johnson S C，Hierarchical clustering schemes [J]． Psychometrika，1967，32( 3) : 241-243．
[19]
Kira K，Ｒendell L A． A practical approach to feature selection[C]/ / Proceedings of the 9th International Workshop on Machine Leaning． San Francisco，C A: Morgan Kaufmann，1992: 249-256．
[20]
Kononenko I． Estimation attributes: analysis and extensions of ＲEL IEF [C]/ /European Conference on Machine Learning． Catania:Springer Verlag，1994: 171-182．
