【摘要】 利用前向差商和后向差商的加权平均值代替灰导数,对非等间距灰色预测模型进行了改进,给出了加权系数的估计公式,并采用逐步递推的方法优化参数,建立新的非等间距GM(1,1)模型.最后通过实例证明了新模型具有较高的精度.更多还原

【Abstract】 Based on the optimizes grey derivative arithmetic,unequal interval grey model GM(1,1)is improved which grey derivative is substituted by weighted average of forward difference quotient and backward difference quotient,and giving the formula of weighted coefficient.The new model of unequal interval sequence is estabhshed by optimize parameter step by step.The application example shows that the new model has highly precision.更多还原