Les problèmes traités dans cette thèse relèvent du cadre général de la modélisation des tunnels profonds, en particulier dans les milieux viscoplastiques. L'objectif de notre travail est de combiner des travaux de recherche de type expérimental et numérique, pour aboutir à une modélisation correcte du problème de l'interaction massif-soutènement et pouvoir optimiser ainsi le dimensionnement des...

A facility has been developed for the determination of the ratio of pulse high voltage dividers over the range from 10 kV to 300 kV using comparative techniques with Kerr electro-optic voltage measurement systems and reference resistive voltage dividers. Pulse voltage ratios of test dividers can be determined with relative expanded uncertainties of 0.4 % (coverage factor k = 2 and thus a two st...

In this paper we consider a two-channel diversity technique that combines the processed signals of two separate microphones. For in-car applications, this enables a better compromise for the microphone positions. The advantage of the proposed system is its insensitivity with respect to varying speaker sizes or local noise sources. To achieve this we choose the microphone position in that way th...

This paper describes a method for qualitatively representing and reasoning about spatial configurations of planar mechanisms. The method has direct relevance to, and implications for, computer-aided mechanism design and robotics. In particular, it can be used to solve spatial configuration problems where exact geometric knowledge is not available, and to provide guidance for the application of ...

We observe that MDS codes have interesting properties that can be used to construct ideal threshold schemes. These schemes permit the combiner to detect cheating, identify cheaters and recover the correct secret. The construction is later generalised so the resulting secret sharing is resistant against the Tompa-Woll cheating.

RÉSUMÉ. Nous considérons le problème de l’étiquetage de noeuds dans un multi-graphe ou graphe multi-relationnel dans lequel les noeuds peuvent être connectés simultanément par différents types de relations. De nombreux problèmes se modélisent ainsi, comme par exemple les réseaux sociaux ou bien les bases de données bibliographiques. Les relations peuvent être explicites (par exemple amitié dans...

The paper proposes a methodology for the determination of the locking range of an Injection-Locked Frequency Divider. The technique involves the use of the Warped Multi-time scale model and is applicable to oscillators in general. The ability to determine, in an efficient manner, the locking ranges of Injection Locked Frequency Dividers is of great importance to design engineers as ILFDs are su...

Résumé — L’identification par la biométrie multimodale consiste à combiner plusieurs systèmes biométriques, elle permet de réduire certaines limitations des systèmes basés sur une seule modalité tout en améliorant de manière significative leurs performances. Dans cet article, des systèmes d’identification multimodaux sont implémentés en combinant les informations issues de deux sources biométri...

Using an ensemble of classi ers, instead of a single classi er, can lead to improved generalization. The gains obtained by combining however, are often a ected more by the selection of what is presented to the combiner, than by the actual combining method that is chosen. In this paper we focus on data selection and classi er training methods, in order to \prepare" classi ers for combining. We r...

Planar directional coupler using Substrate Integrated Waveguide technology (SIW) is proposed in this paper. The SIW coupler with tapered microstrip-SIW transitions are integrated on the same substrate. Planar form makes this coupler structure easily integrable in microwave planar circuits. These proposed power dividers can be applied to the design of the beam-forming network for communication s...