Table 3 Configuration settings.

From: Presenting a model for estimating the cube compressive strength of self-compacting concrete in cast in-situ piles using GEP

 

Parameter

Description

General

Fitness function

RMSE

Number of chromosomes

30

Genes

3

Head size

8

Tail size

9

Gene size

26

Linking function

Addition

Function set

+, -, /, ×, Max2, Avg2, NOT, Ln, 3Rt

Genetic operators

Mutation rate

0.00138

IS transposition rate

0.00546

RIS transposition rate

0.00546

Inversion rate

0.00546

Gene recombination rate

0.00277

Gene transposition

0.00277

Numerical constants

Constants per gene

10

Data type

Floating-point

Lower bound

− 10

Upper bound

+ 10

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