4. Results and Discussion 4.1. Analysis of RF Feature Selection Results To select key features for accurate prediction results in further steps, we constructed an RF model herein. This model was used to compute the percentages of feature importance for velocity and temperature in the PINN model and for porosity, microhardness, and wear rate in the CNN model. The RF evaluation determined the contribution of each input variable to each output variable of the PINN and CNN models in further steps.
