Data/hora: 22/06/2024 13:55:07

Biblioteca(s): | Embrapa Agricultura Digital.
Data corrente: | 16/02/1998
Data da última atualização: | 21/01/2013
Autoria: | CAMPAGNOLO, M. L.; COELHO, H.; CAPELO, J. H.
Título: | Knowledge based clustering of partially characterized objects.
Ano de publicação: | 1995
Fonte/Imprenta: | In: BRAZILIAN SYMPOSIUM ON ARTIFICIAL INTELLIGENCE, 12., 1995, Campinas. Advances in artificial intelligence: proceedings. Berlin: Springer, 1995.
Páginas: | p. 161-170.
Série: | (Lecture Notes in Artificial Intelligence, 991; Lecture Notes in Computer Science).
ISBN: | 3-540-60436-7
Idioma: | Inglês
Notas: | SBIA'95. Ed. by Jacques Wainer and Ariadne Carvalho.
Conteúdo: | Cluster analysis can be generally described as a way to discover and identify concepts from a set of multicharacterized objects. In cluster analysis, each concept is described extensionally by a subset of objects called a class. Taking those concepts as reference, it is known, when the characteristics are not all available, that the cluster analysis procedure can lead to spurious class definitions, caused by the loss of information on the object descriptions. So, one of the possible techniques to handle this problem consists of incorporating more knowledge about the structure of classes of objects in this classification process. In this paper we propose and defend a new method for clustering partially characterized objects, by combining three approaches: 1) the use of probability theory to represent uncertainty on objects' description, 2) the adoption of a Bayesian network model to support and explore knowledge on dependence relations among the objects' descriptive variables, and 3) the introduction of a new similarity measure consistent with the used objects' representation. We also apply this method to a vegetation classification problem and we show that the achieved classification is less sensitive to data erosion than classifications obtained just from the known characteristics of the objects.
Palavras-Chave: | Análise de cluster; Inteligência artificial.
Thesaurus Nal: | artificial intelligence; Cluster analysis.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Agricultura Digital (CNPTIA)
Exemplares: | CNPTIA - (6595-1) - ADD - PL - PP - 006.3 - BRA - 1996.00012 - DIS