End-Point Static Control of Basic Oxygen Furnace (BOF) Steelmaking Based on Wavelet Transform Weighted Twin Support Vector Regression

Table 8

Performance comparisons of V/W control models with four methods.

Model	Criteria	WTWTSVR	TSVR	v-TSVR	Asy v-TSVR	KNNWTSVR
V_model (±800 Nm^3)	RMSE	371.3953	383.0249	383.2387	399.8635	399.7568
	MAE	411.7855	416.3151	423.0260	427.0896	427.0415
	SSE/SST	1.2713	1.3522	1.3537	1.4737	1.4729
	SSR/SST	1.0868	1.1288	0.9691	0.9326	0.9319
	HR, %	90	86	84	86	86
	Time, s	0.6196	0.4397	0.5177	0.4883	0.7014
W_model (±5.5 tons)	RMSE	2.4158	2.8824	2.8431	3.6781	2.9077
	MAE	2.7057	3.1254	3.1632	3.9979	3.2588
	SSE/SST	0.3791	0.5398	0.5251	0.8789	0.5493
	SSR/SST	0.6505	0.5868	0.6739	0.4376	0.6725
	HR, %	88	86	80	80	84
	Time, s	0.1269	0.1230	0.0837	0.0609	0.2999
Hit rates	HR (C)	86	82	88	90	86
	HR (T)	92	94	94	80	94
	DHR	82	78	82	82	82