有循环检测，周期性检测，部分实现了追踪测速迭代松弛算法，调试通过可以使用，到达过程是的泊松过程，验证可用，对于初学者具有参考意义。- There are cycle detection, periodic testing, Partially achieved tracking speed iterative relaxation algorithm, Debugging can be used, Arrival process is a Poisson process, Verification is available, For beginners with a reference value.