Research of Improved Fuzzy c-means Algorithm Based on a New Metric Norm

For the question that fuzzy c-means(FCM)clustering algorithm has the disadvantages of being too sensitive to the initial cluster centers and easily trapped in local optima,this paper introduces a new metric norm in FCM and particle swarm optimization(PSO)clustering algorithm,and proposes a parallel optimization algorithm using an improved fuzzy c-means method combined with particle swarm optimization(AF-APSO).The experiment shows that the AF-APSO can avoid local optima,and get the best fitness and clustering performance significantly.     

浅议接触网停电作业中牵引回流问题及对策

本文以发生在停电作业中因牵引回流分流造成的接触线断线故障为例,分析研究了接触网停电作业中牵引回流问题,对加强牵引供电回流系统、确保回流畅通和停电作业中人身安全进行了探讨,并对相关整治方案和对策提出了建议。