Fig. 9From: Constrained multi-fidelity surrogate framework using Bayesian optimization with non-intrusive reduced-order basisOptimization results obtained using the \(EI_c\) \(\cdot \) and \(PI_c\) Starting from 4 points (first row), the algorithm is iterated for 21 iterations. The first column corresponds to results using the MF model, and the second column results using the OK modelBack to article page