Browsing Complex and Adaptive Systems Laboratory by Subject "Locality"

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Defining locality as a problem difficulty measure in genetic programming

Galván-López, Edgar ; McDermott, James ; O'Neill, Michael ; Brabazon, Anthony (Springer, 2011-04-02)

A mapping is local if it preserves neighbourhood. In Evolutionary Computation, locality is generally described as the property that neighbouring genotypes correspond to neighbouring phenotypes. A representation has high ...
Defining locality in genetic programming to predict performance

Galván-López, Edgar ; McDermott, James ; O'Neill, Michael ; Brabazon, Anthony (IEEE, 2010-07)

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 and phenotype ...
Semantically-based crossover in genetic programming : application to real-valued symbolic regression

Nguyen, Quang Uy ; Nguyen, Xuan Hoai ; O'Neill, Michael ; McKay, Bob (Bob I.) ; Galván-López, Edgar (Springer, 2011-06)

We investigate the effects of semantically-based crossover operators in Genetic Programming, applied to real-valued symbolic regression problems. We propose two new relations derived from the semantic distance between ...