Table 3 Optimal features for implemented models.

From: Modeling crude oil pyrolysis process using advanced white-box and black-box machine learning techniques

Model

Hyperparameter

Optimum value/feature

GPR

Kernel

Rational quadratic

Length_scale

2

Alpha

0.1

Length_scale_bounds

(1e−05, 100,000.0)

GP

Generation Number

50

Population size

8000

Tree depth

10

XGBoost

n_estimators

100

Learing_rate

0.1

Subsample

0.9

Max_depth

5

CatBoost

n_estimators

100

Learing_rate

0.15

Subsample

0.8

Max_depth

5

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