Paper:
Language: English:
Dynamically Adjusting Migration Rates for Multi-Population Genetic Algorithms
Tzung-Pei Hong*, Wen-Yang Lin*, Shu-Min Liu**,
and Jiann-Horng Lin**
*Dept. of Computer Sci. and Info. Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan
**Dept. of Information Management, I-Shou University, Kaohsiung 840, Taiwan
Received: May 25, 2006
Accepted: August 11, 2006
Keywords: soft computing, genetic algorithms, multi-population, migration interval, migration rate
Journal ref: Journal of Advanced Computational Intelligence and Intelligent Informatics, Vol.11, No.4 pp. 410-415, 2007
Abstract
In this paper, the issue of adapting migration parameters for MGAs is investigated. We examine, in particular, the effect of adapting the migration rates on the performance and solution quality of MGAs. Thereby, we propose an adaptive scheme to adjust the appropriate migration rates for MGAs. If the individuals from a neighboring sub-population can greatly improve the solution quality of a current population, then the migration from the neighbor has a positive effect. In this case, the migration rate from the neighbor should be increased; otherwise, it should be decreased. According to the principle, an adaptive multi-population genetic algorithm which can adjust the migration rates is proposed. Experiments on the 0/1 knapsack problem are conducted to show the effectiveness of our approach. The results of our work have illustrated the effectiveness of self-adaptation for MGAs and paved the way for this unexplored area.
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