中文说明：用pso算法求解tsp问题，tsp问题是一个人只需从一个地点出发，到这个地点结束，就可以访问多个城市，这样他就必须获得最小的旅行费用
English Description：
solving tsp problem using pso algorithm, the tsp problem is man that want to visit many cities only once starting from location and ending with this location so that he must gain the minimum cost of the tour