Hybrid Biogeography Based Optimization for Constrained Numerical and Engineering Optimization

Algorithm 3

Hybrid mutation operator.

Target individual for mutation;

For to

 If is selected for mutation as basic BBO

   Get two candidate SIVs of offspring;

   (1) Get a temp SIV by DE rand/1 mutation;

   (2) If rand < 0.5 (rand is random number in )

      Get another temp SIV by (7);

      Else

      Get another temp SIV by (8);

      End if

 Else

   the th SIV of th individual in population Island survives as SIV of offspring;

   (population Island contains new individuals gotten by migration operator)

 End if

End for

Two temp offspring individuals are gotten for , and the better one survives as offspring;