Research Article
Multigene Genetic Programming for Estimation of Elastic Modulus of Concrete
Table 1
Parameter settings for the MGGP algorithm.
| Parameter | Settings |
| Population size | 200, 500, 1000 | Number of generations | 200, 500, 1000 | Maximum number of genes allowed in an individual | 1, 3, 6 | Maximum tree depth | 4, 6 | Tournament size | 12 | Elitism | 0.01% of population | Crossover events | 0.1, 0.85 | High level crossover | 0.2 | Low level crossover | 0.8 | Mutation events | 0.1, 0.85 | Subtree mutation | 0.9 | Function set | +, −, ×, /, ✓, exp, ln, sin, cos |
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