Grey Forecast Model with Aging Fractional Accumulation and Its Properties

Table 1

Model results with different aging parameters.

Year	Actual value	GM (1, 1)	AGM^(1) (1, 1)	AGM^(3) (1, 1)	AGM^(5) (1, 1)	AGM^(10) (1, 1)
2001	247.84	247.84	247.84	247.84	247.84	247.84
2002	273.02	278.58	267.66	270.72	273.1685	275.9409
2003	289.01	282.20	286.13	284.76	283.7412	282.7841
2004	285.21	285.87	294.04	291.63	289.8058	287.7632
2005	288.82	289.59	295.59	294.02	292.7876	291.275
2006	297.08	293.36	293.39	293.49	293.5915	293.6141
2007	293.66	297.17	289.05	291.05	292.8283	295.005
2008	290.40	301.04	283.57	287.34	290.9281	295.6225
2009	279.14	304.95	277.55	282.82	288.2036	295.6053