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Affichage de 961 à 970 sur 1079

Article dans une revue

Analytic Regularity for Linear Elliptic Systems in Polygons and Polyhedra

Martin Costabel, Monique Dauge, Serge Nicaise

We prove weighted anisotropic analytic estimates for solutions of second order elliptic boundary value problems in polyhedra. The weighted analytic classes which we use are the same as those introduced by Guo in 1993 in view of establishing exponential convergence for <i>hp</i> finite...

Mathematical Models and Methods in Applied Sciences, 2012, 22 (8), 63 p. ⟨10.1142/S0218202512500157⟩. ⟨hal-00454133v3⟩

Ouvrages

Curves and Surfaces, 7th International Conference, Avignon, France, June 24-30, 2010

Jean-Daniel Boissonnat, Patrick Chenin, Albert Cohen, Christian Gout, Tom Lyche, Marie-Laurence Mazure, Larry L. Schumaker

This volume constitutes the thoroughly refereed post-conference proceedings of the 7th International Conference on Curves and Surfaces, held in Avignon, in June 2010. The conference had the overall theme: "Representation and Approximation of Curves and Surfaces and Applications". The 39...

Springer, pp.748, 2012, 978-3642274121. ⟨10.1007/978-3-642-27413-8⟩. ⟨hal-00872475⟩

Article dans une revue

Influence of temperature on the hydration products of low pH cements

T. T. H. Bach, C. Cau Dit Coumes, Isabelle Pochard, Cyrille Albert-Mercier, B. Revel, André Nonat

The chemical evolution of two hydrated "low pH" binders prepared from binary (60% Portland cement + 40% silica fume) or ternary (37.5% Portland cement +32.5% silica fume + 30% fly-ash) mixtures was characterized over one year at 20 degrees C. 50 degrees C, and 80 degrees C. The main...

Cement and Concrete Research, 2012, 42 (6), pp.805-817. ⟨10.1016/j.cemconres.2012.03.009⟩. ⟨hal-00760349⟩

Article dans une revue

Infinitely many radial solutions of a mean curvature equation in Lorentz-Minkowski space

Denis Bonheure, Colette De Coster, Ann Derlet

In this paper, we show that the quasilinear equation - div(\frac{\nabla u}{\sqrt{1-|\nabla u|^{2}}}) = |u|^{\alpha-2}u, in R^N has a positive smooth radial solution at least for any α > 2 = 2N/(N − 2), N ≥ 3. Our approach is based on the study of the optimizers for the best constant in the...

Rendiconti dell'Istituto di Matematica dell'Universita di Trieste: an International Journal of Mathematics, 2012, 44 (1), pp.259-284. ⟨hal-03721671⟩

Article dans une revue

Existence of solutions for second-order differential inclusions involving proximal normal cones

Frederic Bernicot, Juliette Venel

In this work, we prove global existence of solutions for second order differential problems in a general framework. More precisely, we consider second order differential inclusions involving proximal normal cone to a set-valued map. This set-valued map is supposed to take admissible values (so in..., Dans cet article on démontre un résultat dʼexistence globale de solutions pour des inclusions différentielles du second ordre. Ou consideré plus précisément des inclusions différentielles du second ordre faisant apparaître le cône proximal normal dʼun ensemble C dépendant du temps. La multifonction...

Journal de Mathématiques Pures et Appliquées, 2012, 98 (3), pp.257-294. ⟨10.1016/j.matpur.2012.05.001⟩. ⟨hal-00491094⟩

Thèse

Frittage, propriétés mécaniques et fonctionnalisation de biocéramiques mono et biphasées, Sintering, mechanical properties and functionalization of single and two-phase bioceramics

Emmanuelle Rguiti-Constantin

Ce mémoire de thèse traite de la synthèse, de la densification, de la caractérisation mécanique et de la fonctionnalisation de biocéramiques de phosphates de calcium mono et biphasées. Les poudres phosphocalciques ont été synthétisées par la technique de précipitation en phase aqueuse par mélange..., This thesis deals with synthesis, densification, mechanical characterization and functionalization of mono- and biphasic calcium phosphate bioceramics. Calcium phosphate powders were synthesized by aqueous precipitation technique by mixing salts of calcium and phosphate. The Ca/P ratio of reactants...

Génie mécanique [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambrésis, 2011. Français. ⟨NNT : 2011VALE0032⟩. ⟨tel-03416182⟩

Thèse

Local Parametric Bézier Interpolants for Triangular Meshes, Interpolants paramétriques locaux sous forme Bézier pour des maillages triangulaires

Maria Alessandra Boschiroli

Problems of Reverse Engineering type are recurrent in computer graphics. They consist in the reconstruction of objects from point clouds. The existing solutions generally use triangular meshes since they are sufficiently general to represent surfaces of arbitrary genus. The goal of this thesis was..., Un problème récurrent en informatique graphique est la reconstruction d'objets à partir de nuages de points. Les solutions existantes consistent à interpoler les données par des triangles plans. Les maillages triangulaires sont utilisés surtout parce qu'ils permettent de reproduire des...

Mathematics [math]. Université de Valenciennes et du Hainaut-Cambrésis; Università degli Studi di Milano-Bicocca, 2011. English. ⟨NNT : 2011VALE0019⟩. ⟨tel-03350487⟩

Article dans une revue

Micro-Macro Correlation in Ferroelectric Materials: Depolarization Mechanism Owing Mechanical Stress

Abdelowahed Hajjaji, Mohamed Rguiti, Yahia Boughaleb, Zina Sassi, Sophie d'Astorg, Rith Ly, Christian Courtois, Gérard Moreau, Anne Leriche

Piezoelectric ceramics are commonly used in numerous piezoelectric actuators and sensors. Most ferroelectric materials behave as piezoelectric for low driving levels. The increase of electric field, temperature or stress levels leads to a depoling and results in some degradation of dielectric and...

Sensor letters, 2011, 9 (6), pp.2190-2193. ⟨10.1166/sl.2011.1792⟩. ⟨hal-04283044⟩

Thèse

Variétés de Richardson : multiplicités et désingularisation, Richardson varieties: multiplicities and desingularization

Michaël Balan

Une variété de Richardson est l'intersection d'une variété de Schubert directe avec une variété de Schubert opposée dans une variété de drapeaux. Dans cette thèse, on s'intéresse aux singularités des variétés de Richardson. Un résultat de Kreiman et Lakshmibai donne la multiplicité d..., A Richardson variety is the intersection of a direct Schubert variety with an opposite Schubert variety inside a fiag variety. ln this thesis, we are interested in the singularities of Richardson varieties. A result of Kreiman and Lakshmibai gives the multiplicity at a T-fixed point on a Richardson...

Mathématiques [math]. Université de Valenciennes et du Hainaut-Cambrésis, 2011. Français. ⟨NNT : 2011VALE0027⟩. ⟨tel-03416030⟩

Article dans une revue

Microstructure and Nanoscale Piezoelectric/Ferroelectric Properties in La 2 Ti 2 O 7 Thin Films Grown on (110)‐Oriented Doped Nb:SrTiO 3 Substrates

Zhenmian Shao, Sébastien Saitzek, Pascal Roussel, Anthony Ferri, Émilie Bruyer, Adlane Sayede, Mohamed Rguiti, Olivier Mentré, Rachel Desfeux

(00l)‐Oriented La 2 Ti 2 O 7 (LTO) thin films with monoclinic perovskite‐layer structure [a = 7.806(2) Å, b = 5.552(3) Å, c = 13.015(5) Å, β = 98.62(2)°] have been grown by a sol–gel route on conducting (110)‐oriented doped Nb:SrTiO 3 (STO) substrates. The narrow rocking curves (0.24° width for 004...

Advanced Engineering Materials, 2011, 13 (10), pp.961-969. ⟨10.1002/adem.201100105⟩. ⟨hal-04282981⟩