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Abdel Hamid is a Muslim male given name, and in modern usage, surname. Search the history of over billion web pages on the Internet. Abdul Hamid Brauimi Hamid is a Muslim male given name, and in modern usage, surname. We consider the geodesic flow of a compact connected rank 1 surface.

We prove a formula for the topological pressure as the exponential growth rate of rank 1 periodic geodesics generalizing a previous result of K. Dynamical Systems, Mathematics Source: A bio-heat transfer model for biological tissues in a micro-scale and periodical settings is investigated. It is assumed that the model is a two-component system consisting of solid particles representing tissue cells and interconnected pores containing either arterial or venous blood.

This tissue-blood system is described by two energy equations, one equation for the solid tissues and the other for the surrounding blood.

abdelhamid brahimi livre pdf francais – PDF Files

On the interface between them, it is assumed that the heat transfer is Let D be a bounded symmetric domain of tube type. We show that the image of the Poisson transform on abdelhqmid degenerate principal series representation brwhimi to the Shilov boundary of D is characterized by a covariant differential brahimii on a homogeneous line bundle on D.

We prove large deviations lower and upper bounds and a contraction principle for the geodesic flow in the space of probability measures of the unit tangent bundle. We deduce a way of approximating equilibrium states for continuous potentials. It is shown that this structure leads to The properties of the solutions are linked to the number theoretic properties of a pair of complex numbers attached to the vector field.

Anashid by Abaaoud al Belgiki Topic: In this paper, periodic homogenization of a steady fluid flow in fissured porous solids with imperfect interfacial contact is performed via two-scale asymptotic method. Criteria of convergence of a non ordinary random continued fractions on a symmetric cone. In this paper, we use a notion of ratio based on a division algorithm, to extend to a symmetric cone the definition of a continued fraction in its more general form.

We then give a criteria of convergence of a non ordinary random continued fraction that has arisen in the study of some probability distributions related to the beta distribution on the cone of positive definite symmetric matrices or on any symmetric cone. We study the homogenization of a steady diffusion equation in a highly heterogeneous medium made of two subregions separated by a periodic barrier through which liver flow is proportional to the jump of the temperature by a layer conductance of the same order of magnitude of the materials in consideration.

The macroscopic governing equations and the effective conductivity of the homogenized model are obtained by means of the two scale convergence technique. We show that under some hypothesis the The two scale convergence of the solution to a Robin’s type-like problem of a stationary diffusion problem in a periodically perforated domain is investigated. It is shown that the Robin’s problem converges to a problem associated to a new operator which is the sum of a standard homogenized operator plus an extra first order “strange” term; its appearance is due to the non-symmetry of the diffusion matrix and to the non rescaled resistivity.


The paper addresses the homogenization of a family of micro-models for the ligre of a slightly compressible fluid in a poroelastic matrix containing periodically distibuted poroelastic inclusions, with low permeabilities and with imperfect contact on the interface. The micro-models are based on Biot’s system for consolidation processes in each phase, with interfacial barrier formulation. Using the two-scale convergence technique, it is shown that the derived system is a general model of that Nonrigidity of a class of two dimensional surfaces with positive curvature and planar points.

Nontrivial infinitesimal bendings for a class of two-dimensional surfaces are constructed. The surfaces considered here are orientable; compact; with boundary; have positive curvature everywhere except at finitely many planar points; and have vanishing first homology group.

Abdelhamid brahimi livre pdf

As a consequence, a nonrigidity result for such surfaces is deduced. By employing exotic heavy fermion fields, this model successfully describes various features of the fermion masses and abvelhamid including large neutrino mixings accompanied by small quark mixings. This paper deals with elliptic equations in the plane with degeneracies. The equations are generated by a complex vector field that is elliptic everywhere except along a simple closed curve. Kernels for these equations are constructed.

Properties of solutions, in a neighborhood of the degeneracy curve, are obtained through integral and series representations.

Internet Archive Search: creator:”Abdelhamid”

An application to a second order elliptic equation with a punctual singularity is given. We apply the result to the time-one map of the geodesic flow of a closed smooth Riemannian manifold. Dourouss Ramadane hm, Cheikh Abdelhamid Rouchai. The stability and performance properties of this filter can be easily deduced from the obtained closed-from solution.

Thereafter, we consider two nonlinear complimentary filters with state-dependent gains which are shown to exhibit improved stability and Optimization and Control, Mathematics Source: Mixture of the Riesz distribution with respect to the multivariate Poisson. The aim of this paper is to study the mixture of the Riesz distribution on symmetric matrices with respect to the multivariate Poisson distribution.

We show, in particular, that this distribution is related to the modified Bessel function of the first kind. We also study the generated natural exponential family. We determine the domain of the means and the variance function of this family. We propose an attitude and gyro-bias estimation scheme for accelerated rigid body systems using an inertial measurement unit IMU and a global positioning system GPS.

We prove semi-global exponential stability of the estimation errors. Furthermore, a new switching technique for the attitude state is Characterization of the cubic exponential families by orthogonality of polynomials. This paper introduces a notion of 2-orthogonality for a sequence of polynomials to give extended versions of the Meixner and Feinsilver characterization results based on orthogonal polynomials.

These new versions subsume the Letac-Mora characterization of the real natural exponential families having cubic variance function.

This paper continues the study of a kernel family which uses the Cauchy-Stieltjes kernel in place of the celebrated exponential kernel of the exponential families theory. We extend the theory to cover generating measures with support that is unbounded on one side.

We illustrate the need for such an extension by showing that cubic pseudo-variance functions correspond to free-infinitely divisible laws without the first moment.

We also determine the domain of means, advancing the understanding of Mathematics, Differential Geometry Source: For a natural exponential family NEFone can associate in a natural way two standard families of conjugate priors, one on the natural parameter and the other on the mean parameter. These families of conjugate priors have been used to establish some remarkable properties and characterization results of the quadratic NEF’s. In the present paper, we show that for a NEF, we can associate a class of NEF’s, and for each one of these NEF’s, we define a family of conjugate priors on the natural In this paper, we consider the cooperative output regulation problem for heterogeneous linear multi-agent systems in the presence of communication constraints.


Under standard assumptions on the agents dynamics, we propose a distributed control algorithm relying on intermittent and asynchronous discrete-time information exchange that can be subject to unknown time-varying delays and information losses.

We show that cooperative output regulation can be reached for arbitrary characteristics of the We propose a systematic and comprehensive procedure for the construction of synergistic potential functions, which are instrumental in hybrid control design on SO 3. A new map via angular warping on SO 3 is introduced for the construction of such a family of potential functions allowing an explicit determination of the critical points and the synergistic gap.

Some optimization results on the synergistic gap are also provided. The proposed synergistic potential functions are used for the Mathematics, Optimization and Control Source: Since there is no sensor that measures the attitude, our approach does not rely on the knowledge or reconstruction of the system orientation as usually done in the existing literature.

An important feature of the proposed strategy, is that the accelerometer is used to measure the apparent acceleration of the vehicle, as New characterizations of the Letac-Mora class of real cubic natural exponential families. In this paper, we give three equivalent properties of the class of multivariate simple cubic natural exponential families NEF’s. These properties represent the extensions to this Abstract Detection and localization of infection can still be a dilemma for both clinicians and imaging specialists.

The list of morphologic and physiologic modalities is increasing with the advancement of research, expanding the applications of existing modalities and developing new radiopharmaceuticals for infection imaging.

Since no single modality is appropriate for all situations, imaging strategy for the diagnosis Beta-hypergeometric probability distribution on symmetric matrices. Some remarkable properties of the beta distribution are based on relations involving independence between beta random variables such that a parameter of one among them is the sum of the parameters of an other see 1.

In the present paper, we extend the properties of the real beta to abdelhaamid beta Incorporation of sweep in a transonic fan design using a 3D blade-row geometry package intended for aero-structural-manufacturing optimization.

A sharp smoothness of the conjugation of class P-homeomorphisms to diffeomorphisms. Let f be a class P -homeomorphism of the circle.

We prove that there exists a piecewise analytic homeomorphism that conjugate f to a one-class P with prescribed break points lying on pairwise distinct orbits. As a consequence, we give a sharp estimate for the smoothness of a conjugation of class P -homeomorphism f of the circle satisfying the D -property i.

When f does not satisfy the Characterization of Poisson integrals on non-tube bounded symmetric domains. We prove that this range is a Hua-Hardy type space for harmonic abdelhaimd satisfying a Hua system.