Direct Discrete Grey Model based on Non-homogeneous Exponential Sequence

10.30016/JGS.201112.0003

Shan Yang；Yong Wei

Non-homogeneous exponential sequence ； Integral ； Derivative ； Direct discrete grey model ； Method of approximate evaluation

Journal of Grey System

14卷4期（2011 / 12 / 01）

145 - 149

英文

Based on the Non-homogeneous growth sequence, we get a new Direct Discrete Grey Model through method of Integral and derivative for whitening differential equation, then solve the parameters in Direct Discrete Grey Model by least square and approximate evaluation method . This model does not need to accumulate or reduce repeatedly the primitive sequence, it is directly related to the primitive sequence, reducing error greatly in the modeling process. Through the example analysis, We discover that the optimized model in this article is not only has the high modeling precision to the low-growth sequence but also to the high-growth sequence. This model expands the model applicable scope, and has the certain use value and feasibility.