Milling Tool Wear State Recognition by Vibration Signal Using a Stacked Generalization Ensemble Model

Table 7

The optimal value of model parameters.

Initial parameters	Value or range	Optimal value
Penalty parameter (C)	[0.01, 0.05, 0.1, 0.2, 0.5, 2, 5, 10, 20, 50, 100]	2
Kernel function parameter ()	[0.01, 0.05, 0.1, 0.2, 0.5, 1, 5]	10
MaxDepth (De)	[3, 4, 5, 6, 7, 8, 9, 10]	5
Min samples split (Ss)	2	2
Min samples leaf (Sl)	1	1