中文说明：核fcm，在几个聚类数据集上测试均有效，自己写的，现在环形数据集和不平衡数据集上测试均有效，分享出来，希望大家指正错误，共同进步。
English Description：
Core FCM, in several clustering data sets test are effective, I write, now ring data sets and unbalanced data sets test are effective, share out, I hope you correct mistakes, common progress.