Fig. 12

Sensitivity analysis with first-order Sobol indices of 2 parameters in comparison with that in the group of 19 parameters, indicating that the sensitivity of originally weakly identifiable parameters has been obviously improved by the iterative algorithm. a Sensitivity analysis with first-order Sobol indices of 2 parameters from 8 time series with respect to time from 0 to 1800 s with step size of 18 s. b Sensitivity analysis with first-order Sobol indices of 2 parameters in the group of 19 parameters from 8 time series with respect to time from 0 to 1800 s with step size of 18 s