Sur l'élasticité parfaite des corps solides chimiquement définis : Analogie nouvelle entre les solides, les liquides et les gaz

in Bulletin de l'Académie Royale des Sciences, des Lettres et des Beaux-arts de Belgique. Sciences. 3e série (1883), VI(11), 507-540

Sur l’emploi de la révulsion chez les médecins de l’antiquité gréco-romaine

in Revue Médicale de Liège (1985), 40(18), 636-638

Sur l'enseignement de la statistique en Communauté française de Belgique

in Repères-IREM (2002), 48

Sur l'erreur résiduelle obtenue en régression linéaire multiple.

Scientific conference (2007)

The residual error is one of the most used criteria for the choice of regression model. The large majority of the criteria for model selection are also functions of the usual variance estimate for a ... [more ▼]

The residual error is one of the most used criteria for the choice of regression model. The large majority of the criteria for model selection are also functions of the usual variance estimate for a regression model, as Akaike criterion information [Akaike, 1973] and Mallows’ criterion [Mallows, 1964]. The effectiveness of these criteria to approach the theoretical model is related to the good estimate of the theoretical residual error of the model. This efficiency is often limited by the sample size used for the estimates. The choice of a invalid model can have bad consequences on the objective of the research in particular on the forecasts, interpretations and the conclusions. We studied by Monte Carlo simulation the effects of the data structure on the quality of the residual error obtained in multiple linear regression. The results showed that the estimator is a good estimator when the model is established without selection of variables, but becomes biased when the model results from a selection of variables. Colinearity between the explanatory variables and the index which measure the importance of the variables in the true model do not have an influence on the quality of the estimator. [less ▲]

Sur l'évaluation des défauts de forme à partir de mesures tridimensionnelles

in European Journal of Mechanical and Environmental Engineering (1998), 43(1), 13-21

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are ... [more ▼]

Owing to the fact that a correct evaluation of form errors is particularly difficult by the classical ways, it seems more efficient to develop numerical algorithms from 3D measures. Several methods are described, including direct and iterative ones. A new method is proposed, which is based on Lp-norms and a specialized algorithm. It proved to be the most effective and robust one in every studied application. Another problem which is seldom studied, concerns the sensibility of form errors to measure errors. A theory is presented which leads to a very simple result. [less ▲]

Sur l’existence d’un plateau systolique dans le sphygmogramme du pouls sénile

in Archives Internationales de Physiologie (1907), V

Sur l'expérience littéraire de Michel Foucault. Littérature et archéologie

Master's dissertation (2006)

Sur l'hémocyanine

in Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences (1892), CXV

Sur l'histoire de l'astronomie à Liège

Diverse speeche and writing (2012)

Cette série de posters s'intéresse à l'astronomie à Liège : (1) l'astronomie avant l'institut (Y. Nazé), (2) l'institut et les premiers directeurs (E. Gosset), et (3) l'astronomie au milieu du 20e siècle ... [more ▼]

Cette série de posters s'intéresse à l'astronomie à Liège : (1) l'astronomie avant l'institut (Y. Nazé), (2) l'institut et les premiers directeurs (E. Gosset), et (3) l'astronomie au milieu du 20e siècle (Y. Nazé). [less ▲]

Sur l'hydrolyse du chlorure ferrique

in Bulletin de l'Académie Royale des Sciences, des Lettres et des Beaux-arts de Belgique. Sciences. 3e série (1897), XXXIV(8), 255-268