【摘要】 通过优化灰导数白化值 ,建立了无偏的 GM(1,1)模型 ,给出了估计模型参数的方法 ,证明了无偏GM(1,1)模型具有白指数律重合性 ,提出了新的预测公式 .实例分析表明 ,新方法提高了模型的精度 ,扩大了模型的适用范围 .更多还原

【Abstract】 By optimizing grey derivative′s whitening values, this paper builds an unbiased GM(1,1) model and proposes a method of estimation of the GM(1,1) model parameters and also proves that an unbiased GM(1,1) model possesses white exponential law coincidence property and proposes new prediction formula. The practical example shows that the new method improves the precision of the GM(1,1) model and enlarges its application scope.更多还原