Neuro-Fuzzy Model for the Prediction and Classification of the Fused Zone Levels of Imperfections in Ti6Al4V Alloy Butt Weld

Table 4

Neural network architecture and performance for the direct approach.

Imperfection	Neurons in the input layer	Neurons in the hidden layer	Neurons in the output layer	Regression slope for training	Regression slope for validation	Correlation coefficient
ℎ1	3	6	1	0.994	0.962	0.912
ℎ2	3	8	1	0.996	0.972	0.922
ℎ3	3	9	1	0.989	0.976	0.938
ℎ6	3	8	1	0.991	0.981	0.921