Table 2.

Prediction error values for the models.

model category	Model	MAE(/EEMD-PSO-LSSVM)	RMSE(/EEMD-PSO-LSSVM)	Time/s
single model	ARIMA	2.927	3.526	0.437
	ETS	3.749	4.123	0.591
	RF	1.771	1.875	0.497
	BP	1.627	1.640	0.316
	RNN	1.740	1.956	0.563
	SVM	2.016	1.906	0.479
	LSSVM	1.765	1.755	0.728
	PSO-LSSVM	1.358	1.385	2.377
combined mode	EMD-PSO-LSSVM	1.452	1.174	4.910
	EEMD-PSO-LSSVM	1	1	5.582