Nonlinear Grey Prediction Model with Convolution Integral NGMC (1,𝑛) and Its Application to the Forecasting of China’s Industrial SO₂ Emissions

Table 7

The modelling values and forecasts of China’s industrial SO₂ emissions by NGMC (1,2).

Time	Modelling values or forecast	Observations	Percent errors (%)
1 (2003)	2158.50	2158.50	0.00
2 (2004)	2135.84	2254.90	−5.28
3 (2005)	2526.60	2549.40	−0.89
4 (2006)	2562.03	2588.80	−1.03
5 (2007)	2473.20	2468.09	0.21
6 (2008)	2335.84	2321.23	0.63
7 (2009)	2163.90	2214.40	−2.28
8 (2010)	1984.36	2185.15	−9.19