灰色关联度分析法是将研究对象及影响因素的因子值视为一条线上的点,与待识别对象及影响因素的因子值所绘制的曲线进行比较,比较它们之间的贴近度,并分别量化,计算出研究对象与待识别对象各影响因素之间的贴近程度的关联度,通过比较各关联度的大小来判断待识别对象对研究对象的影响程度。-Gray correlation analysis method is to study the impact of factors and factor values as a line of points, and question the impact of factors to identify the object and the value of the factor of the curve drawn by comparison of the closeness degree between them, and were quantified, the study calculated to identify the object with the question of the impact factors of the close degree of correlation, by comparing the correlation to determine the size of the object to be studied to identify the extent of the impact.