Neural Network Based Estimation of Service Life of Different Metal Culverts in Arkansas

Table 3

Shallow NN training results for prediction of the soil resistivity data after including laboratory test results.

Training function	Trainbr	Trainbr	Trainbr	Trainbr	Trainbr	Trainbr	Trainbr	Trainbr	Trainbr	Trainbr
Hidden layer structure	[10]	[12]	[14]	[16]	[8]	[8 4]	[10 6]	[10 6 2]	[7 3]	[7]
Number of epochs	572	285	1000	331	504	437	683	1000	432	1000
Training—R value	0.99	0.98	0.99	1	0.98	1	0.98	0.99	0.98	0.42
Testing—R value	0.35	0.07	0.06	−0.18	0.20	0.22	0.38	0.14	0.21	0.13
Overall—R value	0.75	0.61	0.59	0.47	0.74	0.51	0.69	0.68	0.74	0.35