A New Synergistic Forecasting Method for Short-Term Traffic Flow with Event-Triggered Strong Fluctuation

Algorithm 1

Pseudocode of grey differential exponent smoothing.

           Input: Historical traffic flow data set

           Output: Short-term traffic flow forecasting result set

    Initial state probability matrix  , , , ,

    for   to   do

         Calculate forecasting result    and

         ,

         Calculate the error    and  

         ,  

        Update the weights of    and  

         ,

         Update the state transition matrix    by  

   end

   return