Laurent Nicolas

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For modern Diesel engines, accurate fuel-air ratio AFR and Exhaust Gas Recirculation (EGR) rates control is important for manufacturers to face a more restrictive legislation levels. To fulfill the requirements, hardware devices such (EGR) and Variable Geometry Turbochargers (VGT) valves have been introduced, and sophisticated control algorithms were(More)
This paper deals with a concurrent version of the finite element time domain method. The algorithm works in SPMD mode and is executed in the MPI distributed environment. Its properties are validated with some different multi-computer, loosely coupled platforms. The real value and approximated asymptotic values of the basic metrics of speedup are presented(More)
STS is the single enzyme that converts all steroid sulfates into their free steroid forms. Initiation of attack behavior against conspecific male mice appeared to be linked to Sts. Here we have confirmed the role of Sts through an association study with attack behavior. Previous studies indicated a positive correlation between the initiation of attack(More)
A procedure to optimize the specific absorption rate deposed in the patient during oncology hyperthermia treatment is presented. It is based on a genetic algorithm coupled to a finiteelement formulation. The optimization procedure is applied to a real human body obtained from computerized tomography scans.
A finite element method is presented to compute time harmonic microwave fields in three dimensional configurations. Nodal-based finite elements have been coupled with an absorbing boundary condition to solve open boundary problems. This paper describes how the modeling of large devices has been made possible using parallel computation. New algorithms are(More)
We propose new algorithms for the setup phase of algebraic multigrid (AMG) solvers for linear systems coming from edge element discretization. The construction of coarse levels is performed by solving an optimization problem with a Lagrange multiplier method: we minimize the energy of coarse bases under a constraint linking coarse nodal and edge element(More)
A three-dimensional finite-element formulation to compute induced currents into the human body due to relative low-frequency magnetic field is described. Magnetic source field and induced currents are computed separately, allowing to handle sources due to realistic devices. This method is validated using analytical solutions over a sphere. The limit of(More)
In this paper, we propose a new approach to perform cell dielectric characterization from their electrorotation spectrum. At first, a variance analysis is carried out to quantify the dispersion in electrorotation spectra due to the different parameters involved. On this basis, the impact of each parameter is emphasized by weighing the spectrum with an(More)
1 Laboratoire Ampère (CNRS UMR 5005), CNRS-Université de Lyon, Ecole Centrale de Lyon, 69134 Ecully, France 2 Institut Camille Jordan (CNRS UMR 5208), CNRS-Université de Lyon, Ecole Centrale de Lyon, 69134 Ecully, France 3 INRIA, team NACHOS, 06902 Sophia Antipolis, France. 4 XLIM (UMR CNRS 6172), CNRS-Université de Limoges, 87060 Limoges, France. 5 LAPLACE(More)