Table 1.
Parameter list with nominal values for the cortisol model in [15] together with initial values and property
| Parameter | Nominal value | Property | Initial value |
|---|---|---|---|
| Input rate constant, k1 (1/min) | 0.0666 | Linear | 1 |
| Output rate constant, k2 (1/min) | 0.0333 | Linear | 0.01 |
| Constant, α (μg/100 ml) | 0.7 | Nonlinear | 0.01 |
| Constant, β (μg/100 ml) | 1 | Nonlinear | 0.1 |
| Phase, tf (min) | 250 | Nonlinear | 0.1 |
| Delay, d (min) | 70 | Nonlinear | 50 |
| Fixed switch exponent, n | 10 | Nonlinear | Fixed |
Parameters that enter in a linear fashion were estimated using adaptive chaos synchronization while the parameters that enter in a nonlinear fashion were estimated by combining grid search with adaptive chaos synchronization