A Improved Grey Model based on Cosine Transformation

摘要

In this paper, based on the basic theory of GM(1,1), we present a new method based on cosine function transform the discrete data sequence disposed through the standardization processing to improve the smoothness, first we theoretically proved that this transformation can improve smoothness of the original data sequence after a certain standardization, and more effective than some former method, an example is used to demonstrate the effectiveness of this method in the last of this paper.