Evolutionary algorithms typically use direct encodings, where each element of the phenotype is specified independently in the genotype. Because direct encodings have difficulty evolving modular and symmetric phenotypes, some researchers use indirect encodings, wherein one genomic element can influence multiple parts of a phenotype. We have previously shown that Hyper- NEAT, an indirect encoding, outperforms FT-NEAT, a direct-encoding control, on many problems, especially as the regularity of the problem increases. However, HyperNEAT is no panacea; it had difficulty accounting for irregularities in problems. In this paper, we propose a new algorithm, a Hybridized Indirect and Direct encoding (HybrID), which discovers the regularity of a problem with an indirect encoding and accounts for irregularities via a direct encoding. In three different problem domains, HybrID outperforms HyperNEAT in most situations, with performance improvements as large as 40%. Our work suggests that hybridizing indirect and direct encodings can be an effective way to improve the performance of evolutionary algorithms
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
References found in this work BETA
No references found.
Citations of this work BETA
No citations found.
Similar books and articles
Japanese Reported Speech: Against a Direct--Indirect Distinction.Emar Maier - 2009 - In Hattori et al (ed.), New Frontiers in Artificial Intelligence. Springer. pp. 133--145.
The Direct/Indirect Distinction in Contemporary Philosophy of Perception.William C. Fish - 2004 - Essays in Philosophy 5 (1):1-13.
The Puzzle of Free Indirect Discourse.Yael Sharvit - 2008 - Linguistics and Philosophy 31 (3):353-395.
Direct and Indirect Consciousness.Lester Embree - 2006 - Journal of Phenomenological Psychology 37 (1):1-8.
Arguments Against Direct Realism and How to Counter Them.Pierre le Morvan - 2004 - American Philosophical Quarterly 41 (3):221-234.
Added to index2010-07-03
Total downloads82 ( #63,673 of 2,169,100 )
Recent downloads (6 months)1 ( #345,850 of 2,169,100 )
How can I increase my downloads?