说明：  这是改进的Floyid算法程序，用于计算多源最短路，能计算最短路径的基础上，根据每段路的行驶时间，计算出对应最短路的时间矩阵，同时计算出路由矩阵。
(This is the improved algorithm Floyid procedures used to calculate the multi-source shortest path, shortest-path could be calculated based on the traveling time each way, to calculate the time corresponding to the shortest path matrix, calculated at the same time a way out from the matrix.)