4Morgan Stanley.The Mobile Internet Report.. Morgan Stanley Research[R],2009,12.
5Sanwal Kumud K,Walrand,Jean.Vehicles As Probes[D]. U C Berkeley. California Partners for Advanced Transit and Highways (PATH), Institute of Transportation Studies,1995,01.
6Welch G,Bishop G.An introduction to the Kalman filter[R].University of North Carolina at Chapel Hill,Chapel Hill, 1995.