灰色系统用于预测未知数据，是一种比较好的方法，此程序只需改变原始数据即可得到结果！-Gray system is used to predict the unknown data is a better method, this procedure simply by changing the raw data you can get the results!

灰色系统预测，灰色系统的预处理，关联度分析-Grey system prediction, gray system pretreatment, association analysis