Fig. 4
From: Accelerated ensemble optimization using momentum methods
Comparison of using momentum coefficient \(\beta _\Sigma =0.9\) (left panel), \(\beta _\Sigma =0.2\) (middle panel) and \(\beta _\Sigma =0.0\) (right panel) for the covariance matrix update. Momentum (\(\beta =0.9\)) is still applied to the control gradient. A box plot for the final NPV is shown at the top right of each panel.
