Table 2. Parameter search space for the optimisation of the different models.

model	γ	r	n	τ
fixed-step	[10−3, 103]	[10−3, 103]	N/A	N/A
fixed-rate	[10−1, 101]	[10−2, 102]	{1..30}	N/A
gamma	[10−4, 102]	[10−3, 103]	[1, 31]	N/A
DDE	[10−4, 102]	[10−4, 101]	N/A	[10−2, 104]