Trip Travel Time Forecasting Based on Selective Forgetting Extreme Learning Machine

Table 1

Computational cost between SL-ELM and OS-ELM.

Number of calibration points; (offline + online)	Average testing time (S)
	OS-ELM	SL-ELM
20 + 2	0.016	0.018
20 + 4	0.033	0.037
20 + 6	0.048	0.039
20 + 8	0.062	0.055
20 + 10	0.081	0.072