Publicaciones

• ART

Existence of a variational solution for the stationary Boussinesq equations with thermocapillary effect and nonhomogenous boundary conditions

Bernardin Ahounou, Luc Paquet

In this work, we prove the existence of at least one variational solution (u, θ, p) of the stationary Boussinesq equations with thermocapillary effect on the surface and nonhomogenous boundary conditions for the velocity and the temperature. We assume that the domain is plane, bounded and polygonal...

Afrika Matematika, 2016, 27 (5-6), pp.909-921. ⟨10.1007/s13370-015-0386-8⟩. ⟨hal-03138305⟩

• ART

Regularity of solutions of elliptic or parabolic problems with Dirac measures as data

S. Ariche, Colette De Coster, Serge Nicaise

In this paper we study the Laplace and heat equations with Dirac right-hand side. We prove some regularity results in a scale of weighted Sobolev spaces, the weight being the distance to the support of the right-hand side. Model situations in dimension three are treated by using Fourier, Laplace or...

S~eMA Journal , 2016, 73, pp.379-426. ⟨10.1007/s40324-016-0077-x⟩. ⟨hal-03149885⟩

• ART

Fracture toughness of glasses and hydroxyapatite: a comparative study of 7 methods by using Vickers indenter

Isabel Hervas, Alex Montagne, Adrien van Gorp, M. Bentoumi, Anthony Thuault, Alain Iost

Numerous methods have been proposed to estimate the indentation fracture toughness Kic for brittle materials. These methods generally uses formulæ established from empirical correlations between critical applied force, or average crack length, and classical fracture mechanics tests. This study...

Ceramics International, 2016, 42 (11), pp.12740-12750. ⟨10.1016/j.ceramint.2016.05.030⟩. ⟨hal-01337280⟩

• ART

Some properties of range restricted GMRES methods

Mohammed Bellalij, Lothar Reichel, Hassane Sadok

The GMRES method is one of the most popular iterative schemes for the solution of large linear systems of equations with a square nonsingular matrix. GMRES-type methods also have been applied to the solution of linear discrete ill-posed problems. Computational experience indicates that for the...

Journal of Computational and Applied Mathematics, 2015, 290, pp.310-318. ⟨10.1016/j.cam.2015.05.008⟩. ⟨hal-03135561⟩

• THESE

Stability analysis of switched systems on non-uniform time domains, Analyse de stabilité des systèmes à commutations sur un domaine de temps non-uniforme

Fatima Zohra Taousser

This thesis deals with the stability analysis of switched systems that evolve on non uniform time domain by introducing the time scale theory. We are interested mainly in dynamical linear switched systems defined on particular time scale T = P{tσk ,tk+1} = ∪∞k=0[tσk, tk+1]. The studied system..., Cette thèse s’intéresse à l’étude de la stabilité des systèmes à commutation qui évoluent sur un domaine de temps non uniforme en introduisant la théorie des échelles de temps. On s’intéresse essentiellement aux systèmes dynamiques linéaires à commutation définis sur une échelle de temps...

Commutative Algebra [math.AC]. Université de Valenciennes et du Hainaut-Cambresis, 2015. English. ⟨NNT : 2015VALE0038⟩. ⟨tel-01397780⟩

• THESE

Développement de capteurs piézoélectriques interdigités flexibles pour la caractérisation ultrasonore des revêtements, Development of flexibles interdigitated piezoelectric sensors for ultrasonic charaterization of coatings

Rafatou Takpara

Ce travail porte sur la réalisation de capteurs interdigités (IDT pour InterDigital Transducer) sur des supports piézoélectriques. L’enjeu est double puisqu’il s’agit premièrement de disposer de capteurs efficaces pour générer des ondes de surface acoustiques (SAW pour Surface Acoustic Wave) afin..., This work deals with the realization of interdigital sensors (IDT for InterDigital Transducer) on piezoelectric substrates. There is a dual challenge since firstly, the aim is to have efficient sensors to generate surface acoustic waves (SAW) in order to characterize the quality of the coatings and...

Mécanique des matériaux [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambresis, 2015. Français. ⟨NNT : 2015VALE0041⟩. ⟨tel-03461069⟩

• COMM

Comparison of conventional and microwaves sintering of bioceramics

Anne Leriche, Etienne Savary, Anthony Thuault, Jean-Christophe Hornez, Sylvain Marinel, Michel Descamps

Proceedings of the 38th Int'l Conf & Expo on Advanced Ceramics & Composites, Jan 2014, Floride, United States. ⟨hal-03123065⟩

• COUV

Comparison of Conventional and Microwave Sintering of Bioceramics

Anne Leriche, Etienne Savary, Anthony Thuault, Jean-Christophe Hornez, Michel Descamps, Sylvain Marinel

The presence of a susceptor reduces the benefits of microwave heating as it screens to a large extent the microwave fields; therefore, the potential microwave effect on the final microstructures of the sintered samples is lowered. This paper shows that, because of the high microwave coupling of...

Tatsuki Ohji, Mrityunjay Singh, Sanjay Mathur. Advanced Processing and Manufacturing Technologies for Nanostructured and Multifunctional Materials, 35, John Wiley & Sons, pp.23-32, 2015, ⟨10.1002/9781119040354.ch3⟩. ⟨hal-02184177⟩

• ART

Consensus for linear multi-agent system with intermittent information transmissions using the time-scale theory

Fatima Zohra Taousser, Michael Defoort, Mohamed Djemai

This paper investigates the consensus problem for linear multi-agent system with fixed communication topology in the presence of intermittent communication using the time-scale theory. Since each agent can only obtain relative local information intermittently, the proposed consensus algorithm is...

International Journal of Control, 2015, 89 (1), pp.210-220. ⟨10.1080/00207179.2015.1065544⟩. ⟨hal-03184490⟩

• ART

Superlinear critical resonant problems with small forcing term

Mabel Cuesta, Colette De Coster

We prove the existence of solutions of a class of quasilinear elliptic problems with Dirichlet boundary conditions of the following form $$\begin{aligned} \left\{ \begin{array}{l@{\quad }l} Lu= g(u) -f &{} \hbox { in } \quad \Omega ,\\ u\in X, \end{array} \right. \end{aligned}$$ where \(\Omega...

Calculus of Variations and Partial Differential Equations, 2015, 54 (1), pp.349-363. ⟨10.1007/s00526-014-0788-8⟩. ⟨hal-03137590⟩