Browsing by Subject "Equacions diferencials parcials"
Now showing items 120 of 115

3D nurbsenhanced finite element method
(20090608T10:12:04Z)
Conference report
Open AccessAn improvement of the classical finite element method is proposed in [1], the NURBSEnhanced Finite Element Method (NEFEM). It is able to exactly represent the geometry by means of the usual CAD description of the boundary ... 
A boundary control technique to the stringtipmass system based on a nonsymmetric peakdetector model
(2017)
Conference report
Restricted access  publisher's policyThis paper presents a vibration control design to the stringtipmass system by using a nonsymmetric peakdetector mechanism. Previously, this peakdetector system was used as an easy algorithm to mitigate vibration on ... 
A comparison of refinement indicators for hadaptive discontinuous Galerkin methods for the Euler and NavierStokes equations
(Universitat Politècnica de Catalunya, 20180917)
Master thesis
Restricted access  confidentiality agreement 
A conserved phasefield system based on the Maxwell–Cattaneo law
(20130601)
Article
Restricted access  publisher's policyOur aim in this paper is to study a generalization of the conserved Caginalp phasefield system based on the Maxwell–Cattaneo law for heat conduction and endowed with Neumann boundary conditions. In particular, we obtain ... 
A consistent approximation of the total perimeter functional for topology optimization algorithms
(20220224)
Article
Open AccessThis article revolves around the total perimeter functional, one particular version of the perimeter of a shape O contained in a fixed computational domain D measuring the total area of its boundary ¿O, as opposed to its ... 
A critical comparison of two discontinuous galerkin methods for the navierstokes equations using solenoidal aproximations
(20090608T07:49:26Z)
Conference report
Open AccessThis paper compares two methods to solve incompressible problems, in particular the NavierStokes equations, using a discontinuous polynomial interpolation that is exactly divergencefree in each element. The first method ... 
A discontinuous galerkin formulation for solid dynamics
(Omnipress, 2006)
Lecture
Open Access 
A discrete bernoulli free boundary problem
(201204)
Research report
Open AccessWe consider a free boundary problem for the pLaplace operator which is related to the socalled Bernoulli free boundary problem. In this formulation, the classical boundary gradient condition is replaced by a condition ... 
A gradient estimate for nonlocal minimal graphs
(20190401)
Article
Open AccessWe consider the class of measurable functions defined in all of Rn that give rise to a nonlocal minimal graph over a ball of Rn. We establish that the gradient of any such function is bounded in the interior of the ball ... 
A PDE approach of inflammatory phase dynamics in diabetic wounds.
(2014)
Article
Open AccessThe objective of the present paper is the modeling and analysis of the dynamics of macrophages and certain growth factors in the in ammatory phase, the rst one of the wound healing process. It is the phase where there ... 
A Perturbation argument for a Monge–Ampère type equation arising in optimal transportation
(20140501)
Article
Restricted access  publisher's policyWe prove some interior regularity results for potential functions of optimal transportation problems with power costs. The main point is that our problem is equivalent to a new optimal transportation problem whose cost ... 
A singular initial value problem to construct densityequalizing maps
(201112)
Article
Restricted access  publisher's policyThe diffusionbased algorithm to produce densityequalizing maps interprets diffusion as an advection process. This algorithm uses the dynamics of a flow that is defined by an initial value problem that turns out to be ... 
Acoplamiento del modelo regional de calidad de aire (CMAQ) con el modelo de emisiones locales mediante elementos finitos
(20090608T09:47:57Z)
Conference report
Open AccessExisten modelos regionales de calidad del aire que son muy utilizados. Estos modelos tienen modelos para estudiar el aporte de contaminantes provocados por fuentes importantes de contaminación, como pueden ser chimeneas, ... 
Actionangle variables and a KAM theorem for bPoisson manifolds
(201502)
Research report
Open AccessIn this article we prove an actionangle theorem for bintegrable systems on bPoisson manifolds improving the actionangle theorem contained in [LMV11] for general Poisson manifolds in this setting. As an application, we ... 
Adjointbased PDEconstrained optimization using HPC techniques
(Universitat Politècnica de Catalunya, 20131002)
Master thesis
Open AccessThis work focuses in the utilization of current HPC technologies to explore mathematical optimization algorithms in which a PDE acts as main constraint. A development framework is proposed, together with a novel application ... 
An example on Lyapunov stability and linearization
(20200101)
Article
Open AccessThe purpose of this paper is to present an example of a (in the Fréchet sense) discrete dynamical system in a infinitedimensional separable Hilbert space for which the origin is an exponentially asymptotically stable ... 
An improved harmonic load flow formulation
(Taylor & Francis, 20191021)
Article
Open AccessThe paper contributes an improved harmonic load flow formulation with fewer convergence problems but the same accurate results as traditional formulations. The proposed formulation approaches the harmonic load flow problem ... 
Analysis for the strain gradient theory of porous thermoelasticity
(20190101)
Article
Open AccessIn this paper, we analyse a model involving a strain gradient thermoelastic rod with voids. Existence and uniqueness, as well as an energy decay property, are proved by means of the semigroup arguments. The variational ... 
Analyticity in porousthermoelasticity with microtemperatures
(20121015)
Article
Restricted access  publisher's policyIn this note we study the analyticity of the solutions to the onedimensional porouselasticity problem with temperatures and microtemperatures when viscoelasticity and porous viscosity effects are also present. We show ... 
Antisymmetry of solutions for some weighted elliptic problems
(20180317)
Article
Open AccessThis article concerns the antisymmetry, uniqueness, and monotonicity properties of solutions to some elliptic functionals involving weights and a double well potential. In the onedimensional case, we introduce the continuous ...