Short-Term Air Quality Prediction Based on Fractional Grey Linear Regression and Support Vector Machine

Table 10

The results of the hybrid model for PM_2.5

	Actual value (unit: μg/m^3)	Predictive value (unit: μg/m^3)	APE (%)
12–20	101	94	6.9
12–21	61	67	9.8
12–22	68	62	8.8
12–23	58	54	6.9
12–24	41	41	0
12–25	45	41	8.9
12–26	42	42	0
12–27	41	42	2.4
12–28	26	33	26.9
12–29	21	27	28.6
12–30	36	34	5.6
MAPE			9.5
12–31	45	45	0
01–01	57	61	7.0
01–02	60	64	6.7
01–03	63	63	0
MAPE			3.4