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

Table 4

The results of FGM(0, m) for PM₁₀.

	Actual value (unit: μg/m^3)	Predictive value (unit: μg/m^3)	APE (%)
12–20	215	122	43.3
12–21	153	223	45.8
12–22	228	156	31.6
12–23	132	197	49.2
12–24	193	203	5.2
12–25	248	157	36.7
12–26	114	168	47.4
12–27	78	69	11.5
12–28	68	86	26.5
12–29	79	139	75.9
12–30	122	62	49.2
MAPE			38.4
12–31	200	110	45.0
01–01	198	202	2
01–02	273	310	13.6
01–03	299	269	10
MAPE			17.7