Table 2.

The performance measures of the best artificial neural networks.

Performance measures	set				All data
	training	validation		test
R2	0.9679	0.9481	0.9452		0.9594
MSE (nm)	1188	1723	2221		1501
RMSE (nm)	34.47	41.51	47.13		38.74
MAE (nm)	26.38	31.71	33.58		28.88
NSE	0.9679	0.948	0.9451		0.9594