ELM Meets Urban Big Data Analysis: Case Studies

Table 2

The results of smog-related health hazard prediction.

Cities	Stacked ELM			BP			nu-SVR			Epsilon-SVR			Random forest
			Time			Time			Time			Time			Time
Beijing	0.65	0.80	3	0.66	0.79	15	0.78	0.69	9	0.56	0.53	9	0.10	0.15	7
Tianjin	0.92	0.89	3	0.56	0.59	13	0.58	0.73	10	0.66	0.73	11	0.15	0.14	8
Shanghai	0.53	0.88	4	0.55	0.69	16	0.55	0.64	11	0.53	0.53	10	0.12	0.30	8
Hangzhou	0.31	0.86	3	0.63	0.65	10	0.54	0.55	9	0.66	0.83	9	0.15	0.34	7
Guangzhou	0.53	0.54	5	0.65	0.69	15	0.53	0.66	11	0.48	0.53	21	0.10	0.34	8
Average	0.75	0.73	4	0.56	0.56	15	0.59	0.65	10	0.59	0.73	10	0.20	0.34	7