Publicaciones

• Article dans une revue

Control and stabilization of 2 × 2 hyperbolic systems on graphs

Serge Nicaise

We consider 2 × 2 (first order) hyperbolic systems on networks subject to general transmission conditions and to some dissipative boundary conditions on some external vertices. We find sufficient but natural conditions on these transmission conditions that guarantee the exponential decay of the...

Mathematical Control and Related Fields, 2017, 7 (1), pp.53-72. ⟨10.3934/mcrf.2017004⟩. ⟨hal-03152022⟩

• Article dans une revue

Regularity of solutions of elliptic problems with a curved fracture

S. Ariche, Colette De Coster, Serge Nicaise

We consider the Laplace equation with a right-hand side concentrated on a curved fracture of class Cm+2 for some nonnegative integer m (i.e., a sort of Dirac mass). We show that the solution belongs to a weighted Sobolev space of order m, the weight being the distance to this fracture. Our proof...

Journal of Mathematical Analysis and Applications, 2017, 447 (2), pp.908-932. ⟨10.1016/j.jmaa.2016.10.021⟩. ⟨hal-03149894⟩

• Article dans une revue

Null pseudo-isotropic Lagrangian surfaces

A Carriazo, V. Martin-Molina, Luc Vrancken

We show that a Lagrangian, Lorentzian surface M? in a complex space form (M) over tilde (2)(1) (4c) is pseudo-isotropic if and only if M is minimal. Next we obtain a complete classification of all Lagrangian, Lorentzian surfaces which are lightlike pseudo-isotropic but not pseudo-isotropic.

Colloquium Mathematicum, 2017, 150 (1), pp.87-101. ⟨10.4064/cm7107s-12-2016⟩. ⟨hal-03233891⟩

• Chapitre d'ouvrage

A Note on the Asymptotic Stability of Wave-Type Equations with Switching Time-Delay

Serge Nicaise, Cristina Pignotti

We consider second-order evolution equations with intermittently delayed/not-delayed damping. We give sufficient conditions for asymptotic and exponential stability, completing our previous results from Nicaise and Pignotti [Adv. Diff. Eq., 17: 879–902, 2012; J. Dyn. Diff. Eq., 26: 781–803, 2014]....

Kais Ammari; Stephane Gerbi. Evolution Equations: Long Time Behavior and Control, 1, Cambridge University Press, pp.137-150, 2017, 9781108412308. ⟨10.1017/9781108304023.007⟩. ⟨hal-03142598⟩

• Article dans une revue

Control of the γ-alumina to α-alumina phase transformation for an optimized alumina densification

Samir Lamouri, M. Hamidouche, Noureddine Bouaouadja, H. Belhouchet, Vincent Garnier, Gilbert Fantozzi, Jean-François Trelcat

In this work, we studied the aptitude to sintering green bodies using γ-Al2O3 transition alumina as raw powder. We focused on the influence of the heating rate on densification and microstructural evolution. Phase transformations from transition alumina γ → δ → θ → α-Al2O3 were studied by in situ X...

Boletín de la Sociedad Española de Cerámica y Vidrio, 2017, 56 (2), pp.47-54. ⟨10.1016/j.bsecv.2016.10.001⟩. ⟨hal-01804220⟩

• Pré-publication, Document de travail

Cohomologie de Dolbeault feuilletée du feuilletage complexe affine de Reeb

Aziz El Kacimi Alaoui, Rochdi Ben Charrada

2017. ⟨hal-03165346⟩

• Article dans une revue

Optimal control of some quasilinear Maxwell equations of parabolic type

Serge Nicaise, Fredi Tröltzsch

An optimal control problem is studied for a quasilinear Maxwell equation of nondegenerate parabolic type. Well-posedness of the quasilinear state equation, existence of an optimal control, and weak Gateaux-differentiability of the control-to-state mapping are proved. Based on these results, first-...

Discrete and Continuous Dynamical Systems - Series S, 2017, 10 (6), pp.1375-1391. ⟨10.3934/dcdss.2017073⟩. ⟨hal-03166140⟩

• Poster de conférence

Morphology and phase control of titanium dioxide via hydrothermal synthesis with respect to the composition of the precursor solution

Mélanie Wynn, Philippe Champagne, Samuel Bernard, Philippe Miele, Anne Leriche

Annual Meeting du BCerS, Dec 2016, Mol, Belgium. ⟨hal-02881256⟩

• Thèse

Theoretical and numerical study of the stability of some distributed systems with dynamic boundary control, Étude théorique et numérique de la stabilité de certains systèmes distribués avec contrôle frontière de type dynamique

Mohamad Ali Sammoury

This thesis is devoted to the study of the stabilization of some distributed systems with dynamic boundary control. First, we consider the stabilization of the Rayleigh beam equation with only one dynamic boundary control moment or force. We show that the system is not uniformly (exponentially)..., Cette thèse est consacrée à l’étude de la stabilisation de certains systèmes distribués avec contrôle frontière de type dynamique. Nous considérons, d’abord, la stabilisation de l’équation de la poutre de Rayleigh avec un seul contrôle frontière dynamique moment ou force. Nous montrons que le...

General Mathematics [math.GM]. Université de Valenciennes et du Hainaut-Cambresis; Université Libanaise, 2016. English. ⟨NNT : 2016VALE0032⟩. ⟨tel-01523446⟩

• Article dans une revue

Preparation and characterization of anorthite and hydroxyapatite from Algerian Kaolin and natural phosphate

H. Belhouchet, F. Chouia, M. Hamidouche, Anne Leriche

Different composite materials were prepared using kaolin (DD2) and natural phosphate. Several mixtures were used by varying the kaolin content from 20 to 80 mass %. All powders were mixed and grounded by ball milling and then pressed in cylindrical form. Finally, the green samples were sintered...

Journal of Thermal Analysis and Calorimetry, 2016, 126 (3), pp.1045-1057. ⟨10.1007/s10973-016-5655-8⟩. ⟨hal-03117357⟩