Abstract
We define the linkage model evolvability and the evolvability-based fitness distance correlation. These measures give an insight in the search characteristics of linkage model building genetic algorithms. We apply them on the linkage tree genetic algorithm for deceptive trap functions and the nearest-neighbor NK-landscape problem. Comparisons are made between linkage trees, based on mutual information, and random trees which ignore similarity in the population. On a deceptive trap function, the measures clearly show that by learning the linkage tree the problem becomes easy for the LTGA. On the nearest-neighbor NK-landscape the evolvability analysis shows that the LTGA does capture enough of the structure of the problem to solve it reliably and efficiently even though the linkage tree cannot represent the overlapping epistatic information in the NK-problem. The linkage model evolvability measure and the evolvability-based fitness distance correlation prove to be useful tools to get an insight into the search properties of linkage model building genetic algorithms.
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Thierens, D., Bosman, P.A.N. (2012). Evolvability Analysis of the Linkage Tree Genetic Algorithm. In: Coello, C.A.C., Cutello, V., Deb, K., Forrest, S., Nicosia, G., Pavone, M. (eds) Parallel Problem Solving from Nature - PPSN XII. PPSN 2012. Lecture Notes in Computer Science, vol 7491. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32937-1_29
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DOI: https://doi.org/10.1007/978-3-642-32937-1_29
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