jgg     2012 32 (1):  123-126    ISSN: 0412-1961  CN: 21-1139/TG RESEARCH ON EXTRACTING MODEL OF BRIDGE AUTOOSCILATION FREQUENCY BASED ON KALMAN FILTING WITH COLORED NOISE Han Houzeng 1,2) ;Wang Jian 1,2) ; and Ma Changzhong 1, 2) 1)School of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116;2)China University of Mining and Technology, Key Laboratory for Land Environment and Disaster Monitoring of SBSM，Xuzhou 221116 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null