Put forwards the method which use PID in main loop and Pin subloop. 从而提出了主环采用PID校正、副环采用P控制的串级控制方法。
The definitions of Hamiltonian circuit, subloop and family of cycles are given first, then a solving process and a necessary condition about Hamiltonian circuit are discussed. 首先给出哈密顿回路的定义以及子圈和圈族的定义,然后讨论了哈密顿回路的一个求解方法和一个必要条件。