evolutionary algorithms, cooperation, hierarchical model, experimental comparison

The cooperation of evolutionary algorithms in a simple hierarchical model was proposed. Three adaptive variants of differential evolution and covariance-matrix-adaptation evolutionary strategy was chosen for cooperation. The performance of the model was tested on the CEC 2015 suite of 15 functions at levels of the dimension 10 and 30. The results showed that the proposed cooperation is beneficial. The proposed model was superior significantly compared to any of individual algorithms included into the cooperation. The cooperation of the selected four algorithms appeared beneficial especially in the problems of dimension D=30, where the cooperative model outperformed all the algorithms including other cooperative models in comparison.