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Affichage de 761 à 770 sur 1005

  • Communication dans un congrès

Helmholtz Equation in Highly Heterogeneous Media: a two Scales Analysis

Hélène Barucq, Henri Calandra, Théophile Chaumont-Frelet, Christian Gout

Helmholtz Equation in Highly Heterogeneous Media: a two Scales Analysis

Third international workshop on multiphysics, multiscale and optimization problem, May 2014, Bilbao, Spain. ⟨hal-01100475⟩

  • Article dans une revue

Development of Antibacterial Polyester Fabric by Growth of ZnO Nanorods

Munir Ashraf, Frédéric Dumont, Campagne Christine, Philippe Champagne, Anne Perwuelz, Anne Leriche, Nour-Eddine Chihib

ZnO nanorods were grown on polyester fabric by hydrothermal process. The seeding of fabric to grow ZnO nanorods was necessary because they did not grow without seeding. An air plasma treatment was carried out on polyester fabric to generate polar groups which could attach ZnO seeds. ZnO nanorods…

Journal of Engineered Fibers and Fabrics, 2014, 9 (1), ⟨10.1177/155892501400900103⟩. ⟨hal-03121204⟩

  • Thèse

Numerical analysis of the stochastic volatility jump diffusion models, Analyse numérique de modèles de diffusion-sauts à volatilité stochastique

Abdelilah Jraifi

In the modern economic world, the options contracts are used because they allow to hedge against the vagaries and risks refers to fluctuations in the prices of the underlying assets. The determination of the price of these contracts is of great importance for investors.We are interested in problems…, Dans le monde économique, les contrats d'options sont très utilisés car ils permettent de se couvrir contre les aléas et les risques dus aux fluctuations des prix des actifs sous-jacents. La détermination du prix de ces contrats est d'une grande importance pour les investisseurs.Dans…

Statistics [math.ST]. Université de Valenciennes et du Hainaut-Cambrésis, 2014. English. ⟨NNT : 2014VALE0002⟩. ⟨tel-03356473⟩

  • Article dans une revue

Microwave sintering of large size pieces with complex shape

Anthony Thuault, Etienne Savary, J. Bazin, S. Marinel

In this study, large size pieces of kaolin with a complex shape were successfully sintered in a microwave multimode cavity. The challenge was to obtain a sample homogeneously sintered on a large surface. For this purpose, prior to sintering, a finite element modelling study was carried out to…

Journal of Materials Processing Technology, 2014, 214 (2), pp.470-476. ⟨10.1016/j.jmatprotec.2013.09.030⟩. ⟨hal-02450337⟩

  • Communication dans un congrès

EXAMPLE BASED LEARNING FOR VIRTUAL PROTOTYPING ENGINEERING

Jean-Paul Becar, Mariana Fratu, Aurel Fratu, Jean-Charles Canonne

The paper deals with a method used many years for example based learning for the virtual prototyping. The authors collaborate since ten years in Erasmus background. It means four french students a year in the bachelor of technology course got a three months placement in Romania supervised by the…

EDULEARN14, iated, Jul 2014, BARCELONE, Spain. ⟨hal-02516035⟩

  • Article dans une revue

A coupled Maxwell integrodifferential model for magnetization processes

Serge Nicaise, Fredi Tröltzsch

A mathematical model for instationary magnetization processes is considered, where the underlying spatial domain includes electrically conducting and nonconducting regions. The model accounts for the magnetic induction law that couples the given electrical voltage with the induced electrical…

Mathematical News / Mathematische Nachrichten, 2014, 287 (4), pp.432-452. ⟨10.1002/mana.201200206⟩. ⟨hal-03166126⟩

  • Article dans une revue

Classical and Relaxor Ferroelectric Behavior of Titanate of Barium and Zirconium Ceramics

Amina Tachafine, A. Aoujgal, Mohamed Rguiti, M.P.F. Graca, L.C. Costa, Abdelkader Outzourhit, Jean-Claude Carru

BaZrxTi1-xO3 (BZT) (x = 0 to 1) and BaZr0.05Ti0.95-y(Zn1/3Nb2/3)yO3 (BZT(ZnNb)) (y = 0 to 0.1) ceramics were prepared by the conventional solid-solid reaction method. The structural, ferroelectric and dielectric properties of BZT ceramics were studied as well as the dielectric properties of the BZT…

Spectroscopy Letters : An International Journal for Rapid Communication, 2014, Special Issue: Fourth International Meeting on Dielectric Materials (IMDM'4) Marrakech, Morocco, May 29-31, 2013 Submit an article Journal homepage, 47 (5), pp.404-410. ⟨10.1080/00387010.2013.872664⟩. ⟨hal-03122804⟩

  • Article dans une revue

Space-time residual-based a posteriori estimators for the A/Phi magneto dynamic formulation of the Maxwell system

Emmanuel Creusé, Serge Nicaise, Roberta Tittarelli

In this paper, an a posteriori residual error estimator is proposed for the A/Phi magnetodynamic Maxwell system given in its potential and space/time formulation and solved by a Finite Element method. The reliability as well as the e ciency of the estimator are established for several norms. Then,…

Computational Methods in Applied Mathematics, 2014, 14 (4), pp.429-460. ⟨10.1515/cmam-2014-0015⟩. ⟨hal-00921116⟩

  • Article dans une revue

Source identification for the wave equation on graphs, Identification de sources pour l'équation des ondes sur des graphes

Sergei Avdonin, Serge Nicaise

We consider source identification problems for the wave equation on an interval and on trees. The main advantage of our approach is its locality. Our algorithm reduces essentially to the resolution of a linear integral Volterra equation of the second kind and is new even for an interval., Nous considérons un problème d'identification de sources pour l'équation des ondes sur un intervalle ou sur des arbres. L'avantage principal de notre approche est sa localité. Notre algorithme se réduit essentiellement à la résolution d'une équation intégrale de Volterra du…

Comptes Rendus de l'Académie des Sciences - Series III - Sciences de la Vie, 2014, 352 (11), pp.907-912. ⟨10.1016/j.crma.2014.09.008⟩. ⟨hal-03149902⟩

  • Article dans une revue

Well-posedness and spectral properties of heat and wave equations with non-local conditions

Delio Mugnolo, Serge Nicaise

We consider the one-dimensional heat and wave equations but – instead of boundary conditions – we impose on the solution certain non-local, integral constraints. An appropriate Hilbert setting leads to an integration-by-parts formula in Sobolev spaces of negative order and eventually allows us to…

Journal of Differential Equations, 2014, 256 (7), pp.2115-2151. ⟨10.1016/j.jde.2013.12.016⟩. ⟨hal-03163703⟩