Abstract
The performance of an information retrieval system is
usually measured in terms of two different criteria,
precision and recall. This way, the optimisation of any
of its components is a clear example of a
multiobjective problem. However, although evolutionary
algorithms have been widely applied in the information
retrieval area, in all of these applications both
criteria have been combined in a single scalar fitness
function by means of a weighting scheme. In this paper,
we will tackle with a usual information retrieval
problem, the automatic derivation of Boolean queries,
by incorporating a well known Pareto-based
multiobjective evolutionary approach, MOGA, into a
previous proposal of a genetic programming technique
for this task.
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