The Prediction of Steel Bar Corrosion Based on BP Neural Networks or Multivariable Gray Models

Table 3

Comparison of the average fitting errors between models.

	BPNN (%)	GM (1, N) (%)	OGM (1, N) (%)
Accelerated corrosion test data	9.37	87.3	15.48
Project data	10.30	94.21	49.98