Now showing items 1-20 of 23

    • Advanced numerical techniques for inverse problems in geophysics 

      Ortega Gelabert, Olga (Universitat Politècnica de Catalunya, 2020-12-18)
      Doctoral thesis
      Open Access
      This thesis presents an efficient methodology to couple Model Order Reduction techniques within the framework of geophysical probabilistic inversion problems. Accurate models of the interaction between Earth inner processes ...
    • Anàlisi de sensibilitat per un model geofísic 

      Veas Sotorra, Carlota (Universitat Politècnica de Catalunya, 2016-09-22)
      Bachelor thesis
      Restricted access - author's decision
      Les mesures geològiques per identificar paràmetres geofísics es comparen amb el resultat de models numèrics. En particular, per identificar estructures geològiques en escales de l'ordre dels 1000 km, es fan servir models ...
    • Computational vademecums for lattice materials using algebraic PGD 

      Sibileau, Alberto (Universitat Politècnica de Catalunya, 2019-09-24)
      Doctoral thesis
      Open Access
      This dissertation is motivated by the concept of materials by design. Focusing on structures, this states that the properties in a mechanical component are not only inherited by its constituent material, but also by the ...
    • Efficient solvers for power flow equations : parametric solutions with accuracy control assessment 

      García-Blanco, Raquel (Universitat Politècnica de Catalunya, 2017-02-09)
      Doctoral thesis
      Open Access
      The Power Flow model is extensively used to predict the behavior of electric grids and results in solving a nonlinear algebraic system of equations. Modeling the grid is essential for design optimization and control. Both ...
    • Error assessment and adaptivity for structural transient dynamics 

      Verdugo Rojano, Francesc (Universitat Politècnica de Catalunya, 2013-10-15)
      Doctoral thesis
      Open Access
      The finite element method is a valuable tool for simulating complex physical phenomena. However, any finite element based simulation has an intrinsic amount of error with respect to the exact solution of the selected ...
    • Error control for the Stokes’ problem based on a flux free a posteriori error estimator 

      Alfaras, Pere (Universitat Politècnica de Catalunya, 2009-02-03)
      Minor thesis
      Open Access
      This thesis reviews a method introduced by Larsson et al. for the incompressible Stokes’ problem. The method is devoted to computing bounds for the outputs of interest, as well as perform an adaptive mesh refinement. An ...
    • Error estimation and adaptivity for PGD solutions 

      Reis, Jonatha Oliveira de Matos (Universitat Politècnica de Catalunya, 2020-12-29)
      Doctoral thesis
      Open Access
      A significant part of the current research efforts in computational mechanics is focused on analyzing and handling large amounts of data, exploring high dimensional parametric spaces and providing answers to increasingly ...
    • Kernel principal component analysis for dimensionality reduction of nonlinear data 

      Fernández Pinto, Aarón (Universitat Politècnica de Catalunya, 2019-09)
      Bachelor thesis
      Restricted access - confidentiality agreement
    • Modificación de la NA-6310 

      Martínez Llorens, Javier (Universitat Politècnica de Catalunya, 2005-06-10)
      Master thesis (pre-Bologna period)
      Open Access
      Se plantea con motivo de la construcción de la autovía Pamplona Logroño y dentro de las actuaciones que hay que llevar a cavo en la red local de carreteras para conectarse con la nueva infraestructura el realizar un ...
    • Numerical approach for modeling steel fiber reinforced concrete 

      Pros Parés, Alba (Universitat Politècnica de Catalunya, 2012-02-06)
      Doctoral thesis
      Open Access
      One alternative to overcome the main drawbacks of plain concrete in tension (its brittleness and weakness) is Steel Fiber Reinforced Concrete (SFRC), a technique introduced in the 70's, which consists of adding steel fibers ...
    • Numerical modelling and analysis of pore architecture in bone regeneration scaffolds 

      Calvet i Litzell, Pere Nolasc (Universitat Politècnica de Catalunya, 2020-06)
      Master thesis
      Open Access
      Bone regeneration constitutes a major field within tissue engineering and it is receiving widespread attention. Bone fractures are often difficult to heal. Traditional repair methods usually yield unsatisfactory results. ...
    • Numerical simulation of fast transient phenomena in fluid-structure systems 

      Oliveira Bravo, Beñat (Universitat Politècnica de Catalunya, 2012-06)
      Minor thesis
      Open Access
    • Optimal location of distributed generators in electrical grids 

      García Domínguez, Alejandro (Universitat Politècnica de Catalunya, 2014-02-25)
      Minor thesis
      Open Access
      Esta tesina esta basada en la implementación de métodos numéricos en el cálculo de pérdidas de potencia en redes eléctricas y la introducción de la tecnología de Generación Distribuida, apoyada por las Smart Grids (redes ...
    • Petrov-Galerkin Proper Generalized Decomposition strategies for convection-diffusion problems 

      Perelló i Ribas, Rafel (Universitat Politècnica de Catalunya, 2020-06-22)
      Master thesis
      Open Access
      The present thesis explores the capabilities of a dual based Petrov-Galerkin Proper Generalised Decom-position (PGD) method to solve non self-adjoint parametric partial differential equations (PDE). The(consistent) Galerkin ...
    • Proper generalized decomposition solutions for composite laminates parameterized with fibre orientations for fast computations 

      El-Ghamrawy, Karim (Universitat Politècnica de Catalunya, 2021-04-23)
      Doctoral thesis
      Open Access
      Composite materials are gaining popularity as an alternative to classical materials in many different applications. Moreover, their design is even more flexible due to the potential of additive ...
    • Quantifying uncertainty in complex automotive crashworthiness computational models : development of methodologies and implementation in VPS/Pamcrash 

      Rocas Alonso, Marc (Universitat Politècnica de Catalunya, 2021-07-23)
      Doctoral thesis
      Open Access
      The automotive industry is constantly involved in the development of new methodologies and projects with the aim of reducing costs. During the vehicle design process, one of the most significant cost arises from building ...
    • Real-time simulation of load-flow problems in electrical grids 

      Torner Solé, Marc (Universitat Politècnica de Catalunya, 2014-06-14)
      Minor thesis
      Open Access
      In the present situation, the implementation of Smart Grids is one of the pressing challenges in the energy field, both for the improvement in efficiency it implies, as for its positive effects on the environment, since ...
    • Reduced order modeling for smart grids' simulation and optimization 

      Malik, Muhammad Haris (Universitat Politècnica de Catalunya, 2017-02-28)
      Doctoral thesis
      Open Access
      Covenantee:   École Centrale de Nantes
      This thesis presents the study of the model order reduction for power grids and transmission networks. The specific focus has been the transient dynamics. A mathematical viewpoint has been adopted for model reduction. Power ...
    • Reduced order models for 3D parametric lattice structures: computation and post-processing in portable devices 

      Valdés Alonzo, Gabriel Rolando (Universitat Politècnica de Catalunya, 2018-09-28)
      Master thesis
      Open Access
      The Proper General ized Decomposition (PGD) provides explicit parametric solutions of parametric PD Es. Here, the same ideas are used to obtain parametric solutions of the algebraic equations arising from lattice structural ...
    • Reduced order models for pollution transport (advection-diffusion) in urban areas 

      Alvarez Pujol, Claudia (Universitat Politècnica de Catalunya, 2019-06-14)
      Master thesis
      Open Access
      The Proper Generalized Decomposition (PGD) provides explicit parametric solutions of parametric PDEs. Here, this approach used to obtain parametric solutions of advection-diffusion models. This has to be split in two steps: ...