Applications of Gene Expression Programming for Estimating Compressive Strength of High-Strength Concrete

Table 4

Input parameters assigned in GEP model.

Parameters	Settings
General
Genes	4
Chromosomes	30
Linking function	Addition
Head size	10
Function set	+, −, ×, ÷
Numerical constants
Constant per gene	10
Lower bound	−10
Data type	Floating number
Upper bound	10
Genetic operators
Mutation rate	0.00138
Inversion rate	0.00546
RIS transposition rate	0.00546
IS transposition rate	0.00546
One-point recombination rate	0.00277
Gene recombination rate	0.00277
Two-point recombination rate	0.00277
Gene transposition rate	0.00277