Computational Intelligence

142 Chapter Four—Evolutionary Computation Implementations

Following the numbers for the first PSO are the numbers for the second PSO. All

of the numbers have similar meanings to those for the first PSO, so we don’t repeat

the explanation here. Three points, however, should be noted. First, the optimization

type is

1 (maximization problem) instead of 0 (minimization problem) and the

corresponding function type is

1 (G1_MAX) instead of 0 (G1_MIN). Through this

kind of specification, the two PSOs work as two swarms in a co-evolutionary PSO

algorithm. Second, the number of dimensions (9) corresponds to the number of

constraints. Third, the upper and lower