Define ΔA as the observed value of the change in the geographic location of vehicle C by the source node in time B, and D is the estimated value of the change in geographic location of vehicle F in time E.
Defines ∆ A as the observation of the vehicle C geographic location change value by the source node in B time and D as the estimate of the vehicle F geographic location change value in E time.
A is defined as the observation value of the change value of the geographical position of vehicle C by the endogenous node in time B, and D is the estimation value of the change value of the geographical position of vehicle f in time e.<br>