Table 3.

Statistical performance of BP neural network model with different numbers of hidden layer neurons.

Number of Hidden Layer Neurons	Statistical Parameters
	r	RMSE (%)	OI	MAE (%)
12	0.864	4.673	0.933	3.008
14	0.907	4.651	0.936	3.270
16	0.953	4.643	0.942	3.445
18	0.980	4.321	0.946	3.507
20	0.991	4.215	0.951	3.549
22	0.976	4.185	0.949	3.498
24	0.952	4.137	0.945	3.452