Grey convex relation and its properties
Lifeng Wu · Systems Engineering - Theory & Practice · 2012
The convexity,concavity and the relative convexity of positive discrete series are defined,on this basis,the proximity of relative convexity among relevant factors is used to measure relation degree, we present the novel grey convex relation degree,the properties of the grey convex relation degree are discussed.We also put forward the independence from interference factors of the order of grey relations, and point out that the convex relation and other 6 kinds of grey relation degree satisfy the independence from interference factors,the grey relation degree put forward by Julong Deng could not satisfy the independence from interference factors.An example is given to illustrate that the grey convex relation degree can more really reflect the correlation degree among relevant factors sequences.