An ELM Based Online Soft Sensing Approach for Alumina Concentration Detection

Table 2

The comparison of performance indicators.

	Training Time (s)	Testing Time (s)	Training RMSE	Testing RMSE	ARE (%)
ELM	0	0	0.0926	0.1784	6.78
BP	28.3281	0.0156	0.1698	0.2626	9.17
SVM	0.0156	0	0.2635	0.2797	8.83