
268 High Performance Programming for Soft Computing
12.3.2 Genetic algorithm operators
Selection
Selection is a method that randomly picks chromosomes out of the
population according to their evaluation function. The higher the fi tness
function is, the more chance an individual has to be selected. The selection
pressure is defi ned as the degree to which the better individuals are favored.
The higher the selection pressure is, the more the best individuals are
favored. This selection pressure drives the genetic algorithm to improve
the population fi tness over the successive generations (Sivanandam and
Deepa 2008).
Fig. 12.6 Flowchart of genetic ...