TSP是典型的NP完全问题，既其最坏情况下的时间复杂度随着问题规模的增大按指数方式增长，到目前为止还未找到一个多项式时间的有效算法。(TSP is a typical NP complete problem, and its worst-case time complexity increases exponentially as the problem size increases. So far, no polynomial time efficient algorithm has been