Fig. 1

The graph represents the data fitting of the model (3) for \(\zeta =1\), and their corresponding residuals. Sub-figures (a) and (b) respectively represents the model versus data fitting and their corresponding residuals.
The graph represents the data fitting of the model (3) for \(\zeta =1\), and their corresponding residuals. Sub-figures (a) and (b) respectively represents the model versus data fitting and their corresponding residuals.