Modeling NOx Emissions with an Intelligent Combinatorial Algorithm

Table 6

Results of feature selection.

Model	Method	MAPE	RMSE	MAE	R^2
BP	With RF	0.035871	11.662	7.6801	0.90811
	Without RF	0.087257	24.312	18.261	0.67848
Elman	With RF	0.043166	12.187	9.2569	0.89532
	Without RF	0.10501	29.17	22.001	0.5628
ELM	With RF	0.040099	10.775	8.4514	0.91802
	Without RF	0.075587	24.78	15.914	0.61203
LSSVM	With RF	0.029561	9.7406	6.4121	0.93326
	Without RF	0.036291	11.169	7.7067	0.91591
MICA	With RF	0.015686	4.9431	3.3874	0.98286
	Without RF	0.02261	8.1736	4.8672	0.95526