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

Table 5

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

Number of hidden layers	Neurons in hidden layer	Coefficient of determination R^2
		Training data	Validating data	Testing data	All data
1	10	0.99974	0.99976	0.99250	0.99801
1	20	0.99979	0.99979	0.99254	0.99805
1	25	0.99984	0.99986	0.99260	0.99810
1	30	0.99988	0.99990	0.99265	0.99815
1	35	0.99992	0.99996	0.99271	0.99821
1	40	0.99990	0.99992	0.99267	0.99812

The bold values indicate the optimum value.