Forecasting Natural Gas Consumption of China Using a Novel Grey Model

Table 5

Comparison of prediction accuracies generated by these four models.

	Simulative stage			Verification stage
	RMSE	MAE	MAPE	RMSE	MAE	MAPE
GM (1,1)	1102.30	1018.89	6.74	2326.18	1644.86	4.96
DGM (1,1)	1109.40	1027.54	6.84	2432.83	1720.27	5.18
ONGM	1146.33	1030.38	6.90	4395.89	3108.37	8.99
FGNM	1143.64	963.11	6.63	785.48	1087.11	3.12