Nous étudions le problème de coloration probabiliste (PCOLOR) sous une stratégie de modification consistant, pour une solution a priori C, de supprimer les sommets qui son absents de C. Nous calculons la fonction objectif associée avec cette stratégie, donnons des bornes pour sa valeur et caractérisons la complexité algorithmique du calcul de la solution a priori optimal. Nous démontrons que PC...

Résumé. La performance des entrepôts de données est classiquement assurée grâce à des structures comme les index ou les vues matérialisées. Dans ce contexte, des modèles de coût permettent de sélectionner un ensemble pertinent de ce type de structures. Toutefois, cette sélection devient plus complexe dans les nuages informatiques, car en plus des temps de réponse, il faut simultanément optimise...

from 60 decade  sustainability issues  and sustainable developing  have opened a way in scientific meetings associated with  environment and urbanization and architecture. sustainability goals are improving of environment situation , less pollution  and at least interference on  land and interaction of  natural and artificial environment , that most of these cases attracted attention in archite...

Finite tight frames have many applications and some interesting physical interpretations. One of the important subjects in this area is the ways for constructing such frames. In this article we give a concrete method for constructing finite normalized frames using Platonic solids.

Camera calibration is essential to many computer vision applications. Most existing calibration algorithms in the literature consist of estimating both intrinsic and extrinsic camera parameters through non-linear iterative minimizations using only point features. We show that using lines and planes in a consistant framework allows to rst entirely decouple intrinsic and extrinsic camera paramete...

The barks of V.coriaceum were collected from Nilgiri hills, Tamil Nadu, India. A primary organic analysis conducted on the species revealed that the presence of bio-active molecules such as tannins, saponins, phenolic compounds (flavonoids) and other phenolic glycosides as their principal phyto-constituents. The crude drug (Patha) was formulated in to an arista using conventional anaerobic ferm...