Prediction of Air Quality Based on Hybrid Grey Double Exponential Smoothing Model

Table 6

The forecasting results of PM_2.5 concentration.

Date	Actual value	CFES	AAES	Hybrid model
Parameter	—
1-Dec	35	35	35	35
2-Dec	19	19.11	19.00	19.04
3-Dec	29	35.21	28.77	31.38
4-Dec	32	40.67	32.00	35.52
5-Dec	26	32.97	28.58	30.36
6-Dec	30	32.03	30.18	30.93
7-Dec	34	34.33	34.51	34.44
8-Dec	33	33.00	34.65	33.98
9-Dec	51	49.94	50.86	50.49
10-Dec	66	69.03	69.36	69.23
MAPE	—	9.03%	2.32%	4.95%
11-Dec	66	53.80	70.86	63.94
12-Dec	67	56.80	80.13	70.67
13-Dec	78	59.71	85.85	75.25
MAPE	—	19.05%	12.34%	4.04%