Concept
Matrix splitting
Publications associées (34)
Efficient Diffusion-based Illumination Normalization for Face Verification
Sébastien Marcel, Guillaume Heusch
In this paper, the problem of face verification across illumination is addressed. In order to cope with different lighting conditions, a preprocessing step is applied to the face image so as to make it independent on the illumination conditions. The illumi ...
IDIAP2005Scale-free behavior and universality in random fragmentation and aggregation
Paolo De Los Rios, Amos Maritan
Two distinct methods underlying the existence of power-law distribution were studied. The distribution ws stationary under the process of merging and splitting of classes and the distribution of the entities under study was invariant. An explanation for th ...
2004Modified fixed point algorithm in fluid–structure interaction
Fabio Nobile, Simone Deparis, Luca Formaggia
In this work, we address the numerical solution of some non-linear problems arising in the time discretization of fluid–structure interaction problems with fully implicit schemes. At each time step, we have to solve a highly non-linear coupled system, sinc ...
2003Numerical simulation of three-dimensional free surface flows
Jacques Rappaz, Marco Picasso, Vincent Maronnier
A numerical model is presented for the simulation of complex fluid flows with free surfaces in three space dimensions. The model described in Maronnier et al. (J. Comput. Phys. 1999; 155(2):439) is extended to three dimensional situations. The mathematical ...
2003One-dimensional models for blood flow in arteries
Alfio Quarteroni, Luca Formaggia
In this paper a family of one-dimensional nonlinear systems which model the blood pulse propagation in compliant arteries is presented and investigated. They are obtained by averaging the Navier-Stokes equation on each section of an arterial vessel and usi ...
2003Stability of time-splitting schemes for the Stokes problem with stabilized finite elements
The time-dependent Stokes problem is solved using continuous, piecewise linear finite elements and a classical stabilization procedure. Four order-one methods are proposed for the time discretization. The first one is nothing but the Euler backward scheme ...
2001WEC-C: A distributed, deterministic catchment model - Theory, formulation and testing
WEC-C is a distributed, deterministic, catchment-scale water flow and solute transport model containing a number of innovations not present in comparable models. For example, it allows for the imposition of catchment topological changes resulting from land ...
2001Biogeochemical transport modelling of natural and enhanced remediation processes in aquifers
PHT3D, a three-dimensional biogeochemical tool for natural and enhanced remediation of organic compounds in saturated porous media, is presented. The model is based on four modules: a three-dimensional transport model accounting for advective-dispersive tr ...
2000A one-dimensional reactive multi-component transport model for biodegradation of petroleum hydrocarbons in groundwater
A one-dimensional (1-D) multi-component model accounting for hydrological transport inorganic equilibrium chemistry and microbial activity during kinetically controlled biodegradation in groundwater of compounds such as benzene, toluene, ethylbenzene and x ...
1999Numerical simulation of free surface flows
Jacques Rappaz, Marco Picasso, Vincent Maronnier
A numerical model is presented for the simulation of complex fluid flows with free surfaces. The unknowns are the velocity and pressure fields in the liquid region, together with a function defining the volume fraction of liquid. Although the mathematical ...
1999