灰色理论认为系统的行为现象尽管是朦胧的，数据是复杂的，但它毕竟是有序的，是有整体功能的。灰数的生成，就是从杂乱中寻找出规律。-Gray theory that the behavior of the system, although it is hazy, the data is complex, but it is orderly, there is the overall function of the. The generation of grey number is to find out the law　the clutter.