a. CPU time was based on a workstation with dual Intel Quad-Core 2.83 GHz processors.
b. Only one out of five runs completed with a relative improvement of the objective function below 1% between iterations. The rest did not converge within the 5-day time limit after iterating for 583, 989, 777, and 661 times. The corresponding ΦC at termination were 4.85× 10-2, 1.39 × 10-2, 1.75 × 10-2 and 3.75 × 10-2, respectively.
c. Mean value ± standard deviation out of five repeats.
d. Root mean square error of model predictions, where the underlined value refers to the objective function of the minimization.