中文说明：时间域有限差分法（TD-FDM）源代码，用于计算任意传输线问题，最后与理论解比较。进一步说明见程序文件timeUpdt.m
English Description：
Time domain finite difference method (TD-FDM) source code, used to calculate any transmission line problem, and finally compared with the theoretical solution. For further explanation, see the program file timeupdt. M