Detalhes bibliográficos
Ano de defesa: |
2012 |
Autor(a) principal: |
Moraes, Sílvia Maria Wanderley
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Orientador(a): |
Lima, Vera Lúcia Strube de
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Banca de defesa: |
Não Informado pela instituição |
Tipo de documento: |
Tese
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Tipo de acesso: |
Acesso aberto |
Idioma: |
por |
Instituição de defesa: |
Pontifícia Universidade Católica do Rio Grande do Sul
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Programa de Pós-Graduação: |
Programa de Pós-Graduação em Ciência da Computação
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Departamento: |
Faculdade de Informáca
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País: |
BR
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Palavras-chave em Português: |
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Área do conhecimento CNPq: |
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Link de acesso: |
http://tede2.pucrs.br/tede2/handle/tede/5184
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Resumo: |
This work aims to study conceptual structures based on the Formal Concept Analysis method. We build these structures based on lexico-semantic information extracted from texts, among which we highlight the semantic roles. In our research, we propose ways to include semantic roles in concepts produced by this formal method. We analyze the contribution of semantic roles and verb classes in the composition of these concepts through structural measures. In these studies, we use the Penn Treebank Sample and SemLink 1.1 corpora, both in English. We test, also for English, the applicability of our proposal in the Finance and Tourism domains with text extracted from the Wikicorpus 1.0. This applicability was extrinsically analyzed based on the text categorization task, which was evaluated through functional measures traditionally used in this area. We also performed some preliminary studies for a corpus in Portuguese: PLN-BR CATEG. In our studies, we obtained satisfactory results which show that the proposed approach is promising. |