Résumé. Le prétraitement des variables numériques dans le contexte de la fouille de données multi-tables diffère de celui des données classiques individuvariable. La difficulté vient principalement des relations un-à-plusieurs où les individus de la table cible sont potentiellement associés à plusieurs enregistrements dans des tables secondaires. Dans cet article, nous décrivons une méthode de ...

This paper describes the fourfold display, a graphic designed to display the frequencies in a 2 × 2 × k contingency table. In this display the frequency in each cell is shown by a quarter circle, whose area is proportional to the cell count in a given 2 × 2 layer, in a way that depicts the odds ratios for k strata. Confidence rings for the odds ratio can be superimposed to provide a visual test...

This short paper gives an introduction into electronic product catalogs and classification systems such as eCl@ss or UN/SPSC used in this domain. The role of classification systems to foster interoperability of catalog based enterprise systems is explained as well as problems that occur. Afterwards an approach is presented that aims in compensating these problems with the help of a mediating sy...

A solution to the problem posed by the very title of this work was given when, in chapter V, we established that a population having an age distribl;ltion which remains invariable with the passage of time can be assimilated at all times to a Malthusian population (we gave the name of "semi-Malthusian" to these populations with constant age distribution). Once we verify that an actual population...