Table 2
Setting parameters of the used GEP strategy for modeling damaged permeability in this study.
| GEP algorithm parameters | Value |
|---|---|
| No. of chromosomes | 30 |
| No. of genes | 3 |
| Head size | 7 |
| Linking function | + |
| Generations without change | 2000 |
| Fitness function | Root Mean Square Error |
| Inversion | 0.00546 |
| Mutation | 0.00138 |
| IS transposition | 0.00546 |
| RIS transposition | 0.00546 |
| One-point recombination | 0.00277 |
| Two-point recombination | 0.00277 |
| Gene transposition | 0.00277 |
| Gene recombination | 0.00277 |
| Permutation | 0.00546 |
| Constants per gene | 10 |
| Random chromosomes | 0.0026 |
| Type of data | Floating point |
| Random cloning | 0.00102 |
| Operators used | +, −, ×, /, √, EXP, INV, LN, LOG, X2, POW |