Original Publication Date
Journal of Applied Mathematics
Hindawi: Article ID 103591, 10 pages
DOI of Original Publication
Date of Submission
One important challenge of a hybrid genetic algorithm (HGA) (also called memetic algorithm) is the tradeoff between global and local searching (LS) as it is the case that the cost of an LS can be rather high. This paper proposes a novel, simplified, and efficient HGA with a new individual learning procedure that performs a LS only when the best offspring (solution) in the offspring population is also the best in the current parent population. Additionally, a new LS method is developed based on a three-directional search (TD), which is derivative-free and self-adaptive. The new HGA with two different LS methods (the TD and Neld-Mead simplex) is compared with a traditional HGA. Four benchmark functions are employed to illustrate the improvement of the proposed method with the new learning procedure. The results show that the new HGA greatly reduces the number of function evaluations and converges much faster to the global optimum than a traditional HGA. The TD local search method is a good choice in helping to locate a global “mountain” (or “valley”) but may not perform the Nelder-Mead method in the final fine tuning toward the optimal solution.
Copyright © 2013 Wen Wan and Jeffrey B. Birch. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Is Part Of
VCU Biostatistics Publications
Wen Wan and Jeffrey B. Birch, “An Improved Hybrid Genetic Algorithm with a New Local Search Procedure,” Journal of Applied Mathematics, vol. 2013, Article ID 103591, 10 pages, 2013. doi:10.1155/2013/103591