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

Table 3

Original data of PM₁₀ (unit: μg/m³) in Shijiazhuang.

2014	2015	2016	2017	2018
12–20	87	238	866	85	215
12–21	97	490	765	188	153
12–22	108	383	181	268	228
12–23	333	412	142	304	132
12–24	237	376	258	117	193
12–25	191	295	282	116	248
12–26	353	278	298	146	114
12–27	478	51	170	198	78
12–28	237	174	342	222	68
12–29	218	378	308	428	79
12–30	192	155	413	262	122
12–31	122	207	710	95	200
01–01	156	414	617	154	198
01–02	220	617	493	148	273
01–03	358	485	471	146	299