【摘要】 研究了灰色系统ＧＭ（１，１）模型在建模过程中由于原始数列乘以不等于零的常数对模型值及预测值的影响，得出ＧＭ（１，１）模型完全适用于负数据序列建模的结论．更多还原

【Abstract】 In this paper, we study the fact that a constant which multiplies all data in the coarse series would influence the values of model and prediction. The result that GM(1,1) model is suitable to negative data sequence is obtained.更多还原