jgg     2007 27 (3):  56-59    ISSN: 0412-1961  CN: 21-1139/TG APPLICATION OF BP NEURAL NETWORK BASED ON ADAPTIVE KALMAN FILTERING TO NAVIGATION Nie Jianliang 1) ; and Zhang Hui 2) 1)School of Geological and Surveying Engineering, Chang’an University, Xi’an 7100542)Foreign Language Office, Elementary Science Department, Military Economics Academy of PLA,Wuhan 430035 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null