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

Table 6

The comparison results of the two models (unit: μg/m³).

	Actual value	Predictive value
		Holt–Winters	The hybrid model
12–20	215	120	198
12–21	153	159	169
12–22	228	97	212
12–23	132	123	132
12–24	193	102	202
12–25	248	91	199
12–26	114	111	129
12–27	78	92	78
12–28	68	100	94
12–29	79	137	95
12–30	122	105	106
MAPE		34.4%	12.3%
12–31	200	117	200
01–01	198	138	198
01–02	273	152	273
01–03	299	150	247
MAPE		41.5%	4.4%