Table 4. Hyperparameter search space... | Emerald Publishing

Table 4.

Hyperparameter search space

Hyperparameter	Values tested	Notes
Utility function	UCB, EI, POI	See Section 2.3 for more details
κ (UCB)	0.5 ≤ κ ≤ 6	Linear spaced interval, increment of Δκ = 0.1 (56 values)
ξ (EI, POI)	0 ≤ ξ ≤ 0.5	Logarithmic spacing, with 56 values
ν	$\frac{1}{2}, \frac{3}{2}, \frac{5}{2}, \infty$	See Section 2.2 for more details
l	0.01 ≤ l ≤ 1.0	14 values total, more concentrated around 0.1, then every 0.1 to 1.0
n_s	3 ≤ n_s ≤ 15	13 values total, every integer

Hyperparameter	Values tested	Notes
Utility function	UCB, EI, POI	See Section 2.3 for more details
κ (UCB)	0.5 ≤ κ ≤ 6	Linear spaced interval, increment of Δκ = 0.1 (56 values)
ξ (EI, POI)	0 ≤ ξ ≤ 0.5	Logarithmic spacing, with 56 values
ν	$\frac{1}{2}, \frac{3}{2}, \frac{5}{2}, \infty$	See Section 2.2 for more details
l	0.01 ≤ l ≤ 1.0	14 values total, more concentrated around 0.1, then every 0.1 to 1.0
n_s	3 ≤ n_s ≤ 15	13 values total, every integer

Source:

Author’s own work