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

Table 5

The values of parameters 𝑛, 𝑟, 𝑟𝑓, and 𝑟𝑝 in (21), the estimates of model parameters 𝑏₁, 𝑏₂, 𝑢 in (23) and the optimized parameter 𝛽₂ in (40), and the values of RMSPEPR and RMSPEPO in (38) and (39).

Parameters	Values
𝑛	2
𝑟	5
𝑟𝑓	3
𝑟𝑝	0
𝑏1	−0.222770
𝑏2	−46938.3
𝑢	25887.98
𝛽2	−0.06305
RMSPEPR (%)	2.44
RMSPEPO (%)	5.48