%0 Journal Article
%4 sid.inpe.br/plutao/2014/12.01.13.19
%2 sid.inpe.br/plutao/2014/12.01.13.19.17
%@doi 10.4236/iim.2014.65022
%@issn 2150-8194
%F lattes: 1446664587151293 2 PessoaStep:2014:InApAt
%T An Innovative Approach for Attribute Reduction in Rough Set Theory
%D 2014
%9 journal article
%A Pessoa, Alex Sandro Aguiar,
%A Stephany, Stephan,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress asapessoa@gmail.com
%@electronicmailaddress stephan.stephany@lac.inpe.br
%B Intelligent Information Management
%V 6
%N 5
%P 223-239
%K seleção de atributos, mineração de dados, conjuntos aproximativos.
%X The Rough Sets Theory is used in data mining with emphasis on the treatment of uncertain or vague information. In the case of classification, this theory implicitly calculates reducts of the full set of attributes, eliminating those that are redundant or meaningless. Such reducts may even serve as input to other classifiers other than Rough Sets. The typical high dimensionality of current databases precludes the use of greedy methods to find optimal or suboptimal reducts in the search space and requires the use of stochastic methods. In this context, the calculation of reducts is typically performed by a genetic algorithm, but other metaheuristics have been proposed with better performance. This work proposes the innovative use of two known metaheuristics for this calculation, the Variable Neighborhood Search, the Variable Neighborhood Descent, besides a third heuristic called Decrescent Cardinality Search. The last one is a new heuristic specifically proposed for reduct calculation. Considering some databases commonly found in the literature of the area, the reducts that have been obtained present lower cardinality, i.e., a lower number of attributes.
%@language pt
%O Setores de Atividade: Administração pública, defesa e seguridade social.