多变量灰色模型(Multivariable Grey Model,MGM)MGM(1,n)是研究复杂灰色系统的典型模型,其形式是n元一阶常微分方程组,是单点GM(1,1)模型在多点情况的扩展。(Multivariable grey model MGM (1, n) is a typical model for studying complex grey system. Its form is n n first order ordina