Z__XY_的博客

GM(1, 1)表示模型是一阶微分方程，且只含1个变量的灰色模型。相关定义：原始数据序列：x(0)=(x(0)(1),x(0)(2),…,x(0)(n))x^{(0)}=(x^{(0)}(1), x^{(0)}(2),\dots,x^{(0)}(n))x(0)=(x(0)(1),x(0)(2),…,x(0)(n))级比：λ(k)=x(0)(k−1)x(0)(k),k=2,…,n\lambda(k)=\frac{x^{(0)}(k-1)}{x^{(0)}(k)},k=2,\dots,nλ(k)=x(0)