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Affichage de 1771 à 1780 sur 2043

Article dans une revue

Fractal Dimension of Grain Boundary during Heating Comparison between Images Analyses and Monte Carlo Simulation

M. Bigerelle, Jérôme Favergeon, Alain Iost

There are few articles that mention fractal dimension in grain growth mechanism. Some authors build a simplified analytic model showing that initial fractal dimension of grain boundary has an influence on interface modification velocity. Nevertheless they postulate the relation where L is the grain…

Defect and Diffusion Forum (Online), 2012, 323-325, pp.133-138. ⟨10.4028/www.scientific.net/DDF.323-325.133⟩. ⟨hal-04525931⟩

Article dans une revue

Multiscale Modelling of Morphological Evolution of Rough Surface during Superficial, Volume and Evaporation-Condensation Diffusions

M. Bigerelle, Jérôme Favergeon, T. Mathia, Alain Iost

Fractal functions are used to model a metallic interface. An analytical model described by three partial differential equations is built to model time evolution of the surface during heating including three different mechanisms of diffusion: superficial diffusion (SD), volume diffusion (VD) and…

Defect and Diffusion Forum (Online), 2012, 323-325, pp.101-107. ⟨10.4028/www.scientific.net/DDF.323-325.101⟩. ⟨hal-04525935⟩

Article dans une revue

On the definition of an average strain tensor for two-dimensional granular material assemblies

Stéphane Bonelli, O. Millet, François Nicot, Jamila Rahmoun, G. de Saxcé

The description of deformation of granular assemblies is one of the basic ingredients, in view of developing constitutive relations following a micromechanical line. Ignoring the deformation of particles, the macroscopic strain of a granular specimen results from the relative motions of particles,…

International Journal of Solids and Structures, 2012, 49 (7-8), pp.947-958. ⟨10.1016/j.ijsolstr.2011.11.005⟩. ⟨hal-02944925⟩

Article dans une revue

Adding user experience into the interactive service design loop : a persona-based approach

Djilali Idoughi, Ahmed Seffah, Christophe Kolski

Approaches to service design share human–computer interaction's (HCI's) commitment to developing with and for people useful, usable and accessible services. However, there has been little explicit interaction between the emerging service sciences and the interaction design communities.…

Behaviour and Information Technology, 2012, 31 (3), pp.287-303. ⟨10.1080/0144929X.2011.563799⟩. ⟨hal-03285380⟩

Article dans une revue

Hybrid approaches for the two-scenario max-min knapsack problem

Saïd Hanafi, Raïd Mansi, Christophe Wilbaut, Arnaud Fréville

In this paper, we deal with the two-scenario max-min knapsack (MNK) problem. First, we consider several formulations of MNK as a mixed integer programming problem. Then, we propose a hybrid method as an alternative to solve the MNK exactly. The approach combines relaxation technique and the…

International Transactions in Operational Research, 2012, 19, pp.353 - 378. ⟨10.1111/j.1475-3995.2011.00836.x⟩. ⟨hal-03723733⟩

Article dans une revue

Quasi-static and dynamic behaviour of the bone structures with fine geometric and materials modelling aspects

Olivier Mayeur, Grégory Haugou, Fahmi Chaari, Rémi Delille, Pascal Drazetic, Eric Markiewicz

The principle aim of this study is to highlight the influence of velocity on mechanical responses of cortical bones. Quasi-static tests are performed on cubic samples from bovine femurs in order to highlight the anisotropic effect of cortical structure. Thanks to the Hopkinson bars technique, a set…

EPJ Web of Conferences, 2012, 26, ⟨10.1051/epjconf/20122603008⟩. ⟨hal-01654665⟩

Article dans une revue

Decision support systems for air traffic controllers based on the analysis of their decision-making processes

David Annebicque, Igor Crevits, Thierry Poulain, Serge Debernard, Patrick Millot

The growth of air traffic generates a multitude of data and parameters that makes it increasing difficult for air traffic controllers to choose rapidly and safely what to decide. The study of air-traffic control of full or partial automation over the past years highlights the need for better tools…

International Journal of Advanced Operations Management, 2012, 4 (1/2), pp.85. ⟨10.1504/IJAOM.2012.045892⟩. ⟨hal-02112907⟩

Article dans une revue

Iterative semi-continuous relaxation heuristics for the multiple-choice multidimensional knapsack problem

Igor Crevits, Saïd Hanafi, Raïd Mansi, Christophe Wilbaut

Recently several hybrid methods combining exact algorithms and heuristics have been proposed for solving hard combinatorial optimization problems. In this paper, we propose new iterative relaxation-based heuristics for the 0-1 Mixed Integer Programming problem (0-1 MIP), which generate a sequence…

Computers and Operations Research, 2012, 39, pp.32 - 41. ⟨10.1016/j.cor.2010.12.016⟩. ⟨hal-03723740⟩

Article dans une revue

Effects of biofuel from fish oil industrial residue - Diesel blends in diesel engine

Nadia Mrad, Edwin Geo Varuvel, Mohand Tazerout, Fethi Aloui

The present work aims to produce biofuel from fish oil industrial residue and to test the biofuel in diesel engine. A 4.5 kW at 1500 rpm single cylinder air cooled direct injection diesel engine was used for the present experimental work. The experimental results show that the brake thermal…

Energy, 2012, 44 (1), pp.955-963. ⟨10.1016/j.energy.2012.04.056⟩. ⟨hal-00935914⟩

Article dans une revue

Finite element modelling of orthogonal cutting: sensitivity analysis of material and contact parameters

Michel Watremez, Damien Méresse, Laurent Dubar, Julien Brocail

This paper presents a finite element model of orthogonal cutting developed with Abaqus/explicit software. An Arbitrary Lagrangian-Eulerian (ALE) formulation is used to predict chip formation, temperature, chip-tool contact length, chip thickness, and cutting forces. This numerical model makes…

International Journal of Simulation and Process Modelling, 2012, 7 (4), pp.262. ⟨10.1504/IJSPM.2012.049820⟩. ⟨hal-02372529⟩