Fault Diagnosis Method of Polymerization Kettle Equipment Based on Rough Sets and BP Neural Network

Table 1

Historical data of polymerizer.

Sample (𝑈)	Historical datum of polymerizer								Diagnosis type (𝐷)
	𝑎, 𝑆1	𝑏, 𝑆2	𝑐, 𝑆3	𝑑, 𝑆4	𝑒, 𝑆5	𝑓, 𝑆6	𝑔, 𝑆7	ℎ, 𝑆8
1	0.38	119.1	1.55	1.45	93.10	42.6	76.13	29.52	4
2	0.44	188.8	1.00	1.51	93.70	78.9	65.44	82.64	3
3	0.39	138.9	1.01	1.78	93.10	92.3	66.83	29.39	1
4	0.38	133.4	0.88	1.34	92.80	59.9	60.32	83.50	0
5	0.40	140.1	1.61	0.86	56.49	41.5	54.21	29.43	0
⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮
100	0.38	138.1	1.15	1.35	91.85	78.8	52.39	29.99	0