Modeling of Drilling Forces Based on Twist Drill Point Angles Using Multigene Genetic Programming

Table 6

Parameters for MGGP ().

Parameters	Setting values
Population size	300
Number of generations	200
Tournament size	4
Lexicographic selection	True
Max tree depth	8
Max nodes per tree	Inf
Functional set ()	TIMES MINUS PLUS PDIVIDE SIN COS EXP MYPOWER
Terminal set ()	Number of inputs: 2, constants range: [−10 10]
Max genes	5
Using fitness function	regressmulti_fitfun.m
Crossover probability	0.85
Reproduction probability	0.10
Mutation probability	0.05