During the typesetting process, errors were introduced into Equations 13 and 14. The publishers apologise for this error that does not impact the results of the paper. The correct version of the equations are:
(13)
$$ {\sigma}_i\left(\mathbf{z}\right)\hskip0.5em =\hskip0.5em \frac{e^{z_i}}{\sum_{\hskip0pt j = 1}^k{e}^{z_j}} $$
$$ {\sigma}_i\left(\mathbf{z}\right)\hskip0.5em =\hskip0.5em \frac{e^{z_i}}{\sum_{\hskip0pt j = 1}^k{e}^{z_j}} $$(14)$$ {\displaystyle \begin{array}{ccc}t& =& \frac{\sum_{i = 1}^q{\lambda}_i}{\sum_{\hskip0pt j = 1}^p{\lambda}_j}\end{array}}. $$
$$ {\displaystyle \begin{array}{ccc}t& =& \frac{\sum_{i = 1}^q{\lambda}_i}{\sum_{\hskip0pt j = 1}^p{\lambda}_j}\end{array}}. $$
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