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$L$ -rigid databases and the expressibility of incomplete relational query languages. (Abstract).

Turull Torres, José María (1998)

Electronic Journal of SADIO [electronic only]

Learning imprecise semantic concepts from image databases.

Daniel Sánchez, Jesús Chamorro-Martínez (2002)

Mathware and Soft Computing

In this paper we introduce a model to represent high-level semantic concepts that can be perceived in images. The concepts are learned and represented by means of a set of association rules that relate the presence of perceptual features to the fulfillment of a concept for a set of images. Since both the set of images where a perceptual feature appears and the set of images fulfilling a given concept are fuzzy, we use in fact fuzzy association rules for the learning model. The concepts so acquired...

Lossless joins of relational database views.

Luković, Ivan, Mogin, Pavle (1996)

Novi Sad Journal of Mathematics

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