title = "Aplicacao de uma Programacao Genetica Gramatical
Coevolutiva no Apoio a Inferencia da Maxima Deformacao
Longitudinal de dutos com Amassamento",
school = "Ciencia da Computacao, Federal University of Juiz de
Fora",
abstract = "The extraction of underground fluid fuels is an
important resource in order to produce energy. However,
there are several factors that make this practice hard,
such as damage that causes deformations on the pipe
that extracts the fuels. The objective of this work is
to determine relationships between characteristics
observed on the pipe and fluid with the maximum
longitudinal deformation of the pipe from data obtained
through analyses using the Finite Element Method. An
automatic process for knowledge discovery using an
intelligent system that can evolve models in symbolic
form is proposed here. Genetic Programming methods
presented good results to this type of application and
a grammatical approach is adopted here, where the
models (programs) are inferred by means of a Formal
Grammar. A grammar brings to the GP technique the
benefit of generating only valid programs/models and
the possibility of limiting the search space by
introducing bias. Also, a coevolutionary approach is
used to focus the search process on data which are
harder to evaluate. Preliminary computational
experiments were conducted to solve the problem of
inferring a model of the maximum longitudinal
deformation of pipes and the results indicate that the
application of a Co-evolutionary Grammar based Genetic
Programming can solve this problem with good accuracy
and less computational cost.",