A Novel Weighted Fractional GM(1,1) Model and Its Applications

Table 2

Parameters r and λ used in grey prediction models for Example 1.

	GM(1,1)	FGM(1,1)	NIPGM(1,1)	WFGM(1,1)
r	1	0.2401	1	0.3337
λ	1	1	0.2074	0.7307