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Table 4 General parameter settings for the GP experiment

From: Spatial distribution estimation of malaria in northern China and its scenarios in 2020, 2030, 2040 and 2050

Parameters

Descriptions and values

Terminal set

Variables X1, X2, X3, X4, and X5

Function set

+, −, × ,/, power, log, exp, sqrt

Population size

200 individuals

Generations

1000

Fitness function type

Sum of absolute difference (SAD)

Genetic operators

Crossover, mutation

Initialization

[0.85, 0.15]

Operators probability

Variable

Tree depth

Dynamic depth selection

Dynamic max depth

15

Real max tree depth

17

Selection method

Lexictour

Survival

Totalelitism (elistism)