Natural Jute Fibre-Reinforced Polymer Composite System for Posttensioned Beam Strengthening in Flexure

Table 4

Determination coefficient R² for different learning algorithms to predict deflection for Scheme A.

Number of hidden layers	Neurons in hidden layer	Coefficient of determination R^2
		Training data	Validating data	Testing data	All data
1	8	0.99987	0.99978	0.99964	0.99976
1	10	0.99989	0.99981	0.99968	0.99980
1	20	0.99992	0.99983	0.99972	0.99982
1	25	0.99995	0.99985	0.99974	0.99984
1	30	0.99999	0.99989	0.99978	0.99987
1	40	0.99997	0.99984	0.99975	0.99983

The bold values indicate the optimum value.