Fig. 8

A time series plot of the difference voltages (parasitic voltages) obtained from the best machine learning model (red), i.e. RF hybrid model and the physical model (green )for the complete data set, represented as median values. The dashed vertical lines with the highlighted text present times of anode changes. The time window for calculating the median is approximately 10 days before and after (rolling median). The orange shaded areas represent the “good segments” used for machine learning model training and validation. The unshaded areas represent “bad segments”, while some low voltage difference areas were left out for our proof of concept