Grammaire fonctionnelle (de discours) : Évaluation et perspectives

Grammaire de Ramanujan et arbres de Cayley

— We study three sequences of polynomials defined as successive derivatives with respect to a differential operator associated with a grammar (one of these sequences was originally introduced by Ramanujan). Combinatorial interpretations for these polynomials are found in terms of rooted trees and graphs of mappings from [n] to [n]. Introduction Dans [Ra], [B], Ramanujan (et B. Berndt à sa suite...

Évaluation et optimisation de performance énergétique des centres de calcul

Construction, Évaluation et Amélioration Systématiques de Structures de Données

— A very simple formalism, viz. abstract data types, using équations and preconditions, is proposedfor describing the proper tie s oj the object s and the opérations ofa data structure. Two cases studies are detailed: sets, and dictionaries (viz. binary search trees). A small number of rules and heuristics are then developed in order to systematically construct the classical algorithms of searc...

Analyse spatiale, évaluation et cartographie du risque glissement de terrain

Spatial analysis and GIS technology are still seldom used to evaluate and map landslide risk. Especially, few studies concern the automatic mapping of landslide risk at large scales (1:10,000) corresponding to the scale of the legal regulation plans in France. Maquaire et al., Analyse spatiale du risque « glissement de terrain » 2 This paper presents a three-step procedure to map landslide risk...

Garantie de la qualité de service et évaluation de performance des réseaux de télécommunications