中文说明：数据处理对于两个系统之间的因素，其随时间或不同对象而变化的关联性大小的量度，称为关联度。在系统发展过程中，若两个因素变化的趋势具有一致性，即同步变化程度较高，即可谓二者关联程度较高；反之，则较低。因此，灰色关联分析方法，是根据因素之间发展趋势的相似或相异程度，亦即“灰色关联度”，作为衡量因素间关联程度的一种方法。
English Description：
Data processing is a measure of the relevance of factors between two systems that change with time or different objects, which is called relevance. In the process of system development, if the change trend of the two factors is consistent, that is, the degree of synchronous change is higher, the degree of correlation between the two factors is higher; on the contrary, it is lower. Therefore, the grey correlation analysis method is based on the similarity or dissimilarity degree of the development trend between factors, namely "grey correlation degree", as a method to measure the correlation degree between factors.