Transformer les valeurs en action

Cohérences basées sur les valeurs en échec

In constraint satisfaction, basic inferences rely on some properties of constraint networks, called consistencies, that allow the identification of inconsistent instantiations or nogoods. Two main families of consistencies have been introduced so far : those that permit to reason from variables such as (i, j)-consistency and those that permit to reason from constraints such as relational (i, j)...

Transformer les Open Data brutes en graphes enrichis en vue d'une intégration dans les systèmes OLAP

The Open Data integration in the decision systems is challenged by the absence of schema, the raw data and the semantic and structural heterogeneousness. In the literature, the most of authors studies the integration of RDF’Open Data in information systems besides the little percentage of available data in this format. On the other hand, few works are interested of Excel’Open Data despite they ...

Analyse en norme Lp de l'algorithme d'itérations sur les valeurs avec approximations

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Représentation condensée en présence de valeurs manquantes

Missing values are an old problem that is very common in real data bases. We describe the damages caused by missing values on condensed representations of patterns extracted from large data bases. This is important because condensed representations are very useful to increase the efficiency of the extraction and enable new uses of patterns (e.g., rules with minimal body, clustering, classificat...

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