Forecasting of Wastewater Discharge and the Energy Consumption in China Based on Grey Model

Table 2

Deviation indexes of simulation results for different forecasting methods.

Method	MAPE(%)	MAE	MSE
FGM(1,1) model	2.42	0.3500	0.2115
OFGM(1, 1) model	1.92	0.2640	0.1536