Research Article
Application of Gene Expression Programming to Evaluate Strength Characteristics of Hydrated-Lime-Activated Rice Husk Ash-Treated Expansive Soil
Table 4
Parameters setting for GEP algorithms.
| Parameters | Settings | CBR, UCS28, RValue |
| General | | Training records | 81 | Validation/Testing records | 40 | Number of chromosomes | 50 | Number of genes | 3 | Head size | 8 | Linking function | Addition | Function set | +, −, ×, ÷, exp, Sqrt, ln |
| Numerical constants | | Constants per gene | 10 | Type of data | Floating point | Maximum complexity | 10 | Ephemeral random constant | [−10, 10] |
| Genetic operators | | Mutation | 0.00138 | Inversion rate | 0.00546 | IS transposition rate | 0.00546 | RIS transposition rate | 0.00546 | One-point recombination rate | 0.00277 | Two-point recombination rate | 0.00277 | Gene recombination rate | 0.00277 | Uniform recombination | 0.00755 |
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