【摘要】 当原始序列属代数曲线型时，应用ＧＡＭ模型可以提高精度，从而避免进行ＧＭ（１，１）模型的残差修正二次建模。从分析ＧＭ（１，１）模型的缺陷着手，结合实例详细介绍了ＧＡＭ模型的思想形成和计算方法。更多还原

【Abstract】 When inital sequence belongs to algebra currve, the precision in environmental forecast may be improved by using GAM model. By means of analysing defect of GM(1,1)model, in the light of an example,GAM model and its calculation method are introduced in detall.更多还原