摘要
GM 所依的累加生成数列与时间的关系 x^(1)(k)～t_k 实质上是 k_k～k△t 的关系,该对应关系中有公因子 k,是明显的假相关。本文认为建立在假相关基础上的 GM 不宜用于预测。
In fact,the relation between time and accumulated generating sequence which depends on GM model,x^(1)(k)～t_k,is the relation k_k～k△t.The relation has the common factor K.So it is distinctly the pseudo-correlation.This paper considers that GM model which depends on pseudocorrelation is not suitable to be used in forecasting.
关键词
灰色系统
GM模型
预测
假相关
grey systems
GM model
accumulated generating sequence
forecasting
correlation coefficient
pseudo-correlation
