Browsing School of Computer Science and Statistics by Author "GALVAN-LOPEZ, EDGAR"
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Comparing the Performance of the Evolvable PiGrammatical Evolution Genotype Phenotype Map to Grammatical Evolution in the Dynamic Ms. Pac-Man Environment
GALVAN-LOPEZ, EDGAR (IEEE Press, 2010)In this work, we examine the capabilities of two forms of mappings by means of Grammatical Evolution (GE) to successfully generate controllers by combining high-level functions in a dynamic environment. In this work we ... -
Defining Locality in Genetic Programming to Predict Performance
GALVAN-LOPEZ, EDGAR (IEEE Press, 2010)A key indicator of problem difficulty in evolutionary computation problems is the landscape?s locality, that is whether the genotype-phenotype mapping preserves neighbourhood. In genetic programming the genotype ... -
The Effects of Constant and Bit-Wise Neutrality on Problem Hardness, Fitness Distance Correlation and Phenotypic Mutation Rates.
GALVAN-LOPEZ, EDGAR (2011)Kimura?s neutral theory of evolution has inspired researchers from the evolutionary computation community to incorporate neutrality into Evolutionary Algorithms (EAs) in the hope that it can aid evolution. The effects of ... -
How and Why a Bit-Wise Neutrality with and without Locality Affects Evolutionary Search
GALVAN-LOPEZ, EDGAR (ACM Press, 2007)Despite the vast work on neutrality, there are not general conclusions on its effects. In this paper we make an effort to understand how neutrality in uences evolution. For this purpose we will use a type of neutrality ... -
Implementing an Intuitive Mutation Operator for Interactive Evolutionary 3D Design
GALVAN-LOPEZ, EDGAR (IEEE Press, 2010)Locality - how well neighbouring genotypes correspond to neighbouring phenotypes - has been described as a key element in Evolutionary Computation. Grammatical Evolution (GE) is a generative system as it uses grammar ... -
Investigating Mapping Order in ðGE
GALVAN-LOPEZ, EDGAR (IEEE Press, 2010)We present an investigation into the genotypephenotype map in Position Independent Grammatical Evolution (?GE). Previous studies have shown ?GE to exhibit a performance increase over standard Grammatical Evolution ... -
Towards Understanding the Effects of Locality in GP
GALVAN-LOPEZ, EDGAR (IEEE Press, 2009)Locality - how well neighbouring genotypes correspond to neighbouring phenotypes - has been defined as a key element in Evolutionary Computation systems to explore and exploit the search space. Locality has been studied ... -
Towards Understanding the Effects of Neutrality on the Sudoku Problem
GALVAN-LOPEZ, EDGAR (ACM Press, 2007)Over the last years, researchers have added neutrality in the evolutionary search in the hope that it can aid evolution. In this paper, we study the presence of neutrality that is already and to do so, we analised the ... -
Tree-Adjunct Grammatical Evolution
GALVAN-LOPEZ, EDGAR (IEEE Press, 2010)In this paper we investigate the application of tree-adjunct grammars to grammatical evolution. The standard type of grammar used by grammatical evolution, context-free grammars, produce a subset of the languages that ...