中文说明：
应用粒子群优化算法优化bp网络的权值和阈值应用于故障诊断，程序可行，效果明显编写详细，注释清晰。
English Description：
Applying particle swarm optimization algorithm to optimize the weights and thresholds of BP network to fault diagnosis, the program is feasible, the effect is obvious, the writing is detailed, and the notes are clear