Grey relativity analysis is a theoretical method of grey system theory. 灰色关联度分析是灰色系统理论的一种理论方法。
By calculating the grey associative degree, the different disastrous conditions of natural disaster are compared and analyzed. 用计算自然灾害不同灾情的灰色关联度的方法，来对不同灾情进行比较分析。
