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

Table 2

The values of parameters 𝑛, 𝑟, 𝑟𝑓, and 𝑟𝑝 in (7), the estimates of model parameters 𝑏₁, 𝑏₂, and 𝑢 in (10), and the values of RMSPEPR and RMSPEPO in (38) and (39).

Parameters	Values
𝑛	2
𝑟	5
𝑟𝑓	3
𝑟𝑝	0
𝑏1	−0.557995
𝑏2	−0.015596
𝑢	1806.203
RMSPEPR (%)	8.02
RMSPEPO (%)	185.25