中文说明：用于通用和Verhulst模型，用于灰色预测模型，它是由一组学生在中国创建的，它包括一些档案利用MATLAB和它是非常有用的因为它包括了灰色模型和大量实例代码
English Description：
used for GM and Verhulst model,useful for grey model and it is created by a group of students in china, it includes a number of archives by matlab and it is very very useful because it has included the code for grey model and a number of examples