Short-Term Coalmine Gas Concentration Prediction Based on Wavelet Transform and Extreme Learning Machine

Table 1

Prediction error of wavelet decomposition sequence.

Reconstructed sequence	MAE	MAPE	RMSE	NRMSE
𝐷1	0.0024	9.0188	0.0032	0.0378
𝐷2	0.0036	4.0222	0.0045	0.0333
𝐷3	0.0024	0.7098	0.0032	0.0233
𝐴3	0.0015	0.0037	0.0022	0.0035