An Improved Nonhomogeneous Grey Model with Fractional-Order Accumulation and Its Application

Table 2

The predicted values of original domain by employing the competing models in Case 1.

Year	Data	NGM	FHGM(1,1)	FDNGM	PR(3)	ONGM
2003	294.19	294.19	294.83	294.19	294.09	294.19
2004	309.06	306.71	302.47	305.74	314.59	302.43
2005	347.68	350.15	347.61	348.78	347.42	347.57
2006	405.20	396.48	395.35	398.12	390.42	395.31
2007	449.22	445.90	445.86	450.10	441.44	445.81
2008	484.41	498.59	499.28	503.75	498.32	499.23
2009	533.80	554.79	555.79	558.71	558.93	555.74
2010	626.44	614.72	615.57	614.86	621.10	615.52
2011	717.03	678.63	678.81	672.13	682.68	678.75
2012	723.50	746.79	745.70	730.52	741.53	745.64
2013	813.30	819.48	816.46	790.01	795.49	816.40
2014	867.24	897.00	891.30	850.59	842.41	891.24
2015	875.37	979.67	970.48	912.28	880.13	970.41
2016	924.89	1067.83	1054.23	975.06	906.51	1054.16
2017	996.55	1161.85	1142.82	1038.95	919.40	1142.75
2018	1118.79	1262.12	1236.54	1103.93	916.64	1236.46