The Optimization DGM(2,1) Model and Its Application

摘要

The existing DGM(2,1) model simulation accuracy is not high, the result difficult to be applied directly to the actual calculation, for this, Many scholars have made a lot of optimization work on the second-order gray model. This paper according to Lagrange's mean value theorem, through optimizing the existing DGM(2,1) model, made the whitening differential equation and the original equation of DGM(2,1) mode more matches, at the same time got the new prediction equation. After testing, the method can improve the simulation accuracy of models, which has some theoretical and practical value.