Ara es mostren els items 47-66 de 145

    • Derivation of shallow water models for steady and transient phenomena, required assumptions and resulting equations 

      Steffens, Lindaura Maria; Díez, Pedro (2009-04-07T11:25:00Z)
      Text en actes de congrés
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      The shallow water models describe water flow in rivers, lakes and shallow seas. They are used to study many physical phenomena of interest, such as, modeling environmental effects, commercial activities on fisheries and ...
    • Discrete empirical interpolation for hyper-reduction of hydro-mechanical problems in groundwater flow through soil 

      Nasika, Christina; Díez, Pedro; Gerard, Pierre; Massart, Thierry J.; Zlotnik, Sergio (2023-04-10)
      Article
      Accés obert
      The recent surge in the availability of sensor data and computational resources has fostered the development of technologies for optimization, control, and monitoring of large infrastructures, integrating data and numerical ...
    • Discrete meso-modeling of steel fiber reinforced concrete: simulation of flexural behavior 

      Pros Parés, Alba; Díez, Pedro; Molins i Borrell, Climent (International Centre for Numerical Methods in Engineering (CIMNE), 2011)
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      Concrete provides with a variety of innovative designs, but two characteristics have limited its use: it is brittle and weak under tension. One way to overcome this problem is to add steel fibers into the concrete matrix, ...
    • Discrete meso-modeling of steel fiber reinforced concrete: simultation of flexural behavior 

      Pros, Alba; Díez, Pedro; Molins i Borrell, Climent (CIMNE, 2011)
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      Concrete provides with a variety of innovative designs, but two characteristics have limited its use: it is brittle and weak under tension. One way to overcome this problem is to add steel fibers into the concrete matrix, ...
    • Educating XXIst century civil engineers in Barcelona 

      Turmo Coderque, José; Estela Carbonell, M. Rosa; Chacón Flores, Rolando Antonio; Gironella Cobos, Xavier; Lloberas Valls, Oriol; Oliver Olivella, Xavier; Poblet-Puig, Jordi; Puigví Burniol, Maria Àngels; Valls del Barrio, Susanna; Díez, Pedro (2017)
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      The educational programs of Civil Engineering schools have evolved to adapt to changes in society demands and regulations. Specifically, Civil Engineering curricula in Spain was highly impacted by the Bolonia Declaration ...
    • Effect of the separated approximation of input data in the accuracy of the resulting PGD solution 

      Zlotnik, Sergio; Díez, Pedro; Huerta, Antonio (CIMNE, 2015)
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      Separated representations are commonly used to avoid the so-called curse of dimensionality, that is, an exponential increase in the number of degrees of freedom with the number of dimensions. In order to use separated ...
    • Effect of the separated approximation of input data in the accuracy of the resulting PGD solution 

      Zlotnik, Sergio; Díez, Pedro; González, David; Huerta, Antonio (Springer, 2015-11-25)
      Article
      Accés obert
      The Proper Generalized Decomposition (PGD) requires separability of the input data (e.g. physical properties, source term, boundary conditions, initial state). In many cases the input data is not expressed in a separated ...
    • Encapsulated PGD algebraic toolbox operating with high-dimensional data 

      Díez, Pedro; Zlotnik, Sergio; García González, Alberto; Huerta, Antonio (2019-11-28)
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      Accés obert
      In its original conception, proper generalized decomposition (PGD) provides explicit parametric solutions, denoted as computational vademecums or digital abacuses, to parametric boundary value problems. The PGD approach ...
    • Enforcing interface flux continuity in enhanced XFEM: stability analysis 

      Díez, Pedro; Zlotnik, Sergio; Cottereau, Régis (2012)
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      XFEM is found to be an efficient approach for solving multiphase problems.
    • Engagement of civil engineer students in the first academic year 

      Estela Carbonell, M. Rosa; Díez, Pedro (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
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      Stronger student engagement or improved student engagement are common instructional objectives expressed by Higher Educational Institutions. They aim, in particular, at reducing the early dropouts of Science, technology, ...
    • Enhanced goal-oriented error assessment and computational strategies in adaptive reduced basis solver for stochastic problems 

      Serafin, Kevin; Magnain, Benoît; Florentin, Eric; Parés Mariné, Núria; Díez, Pedro (John Wiley & Sons, 2017-05-04)
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      Accés obert
      This work focuses on providing accurate low-cost approximations of stochastic ¿nite elements simulations in the framework of linear elasticity. In a previous work, an adaptive strategy was introduced as an improved Monte-Carlo ...
    • Enrichissement des interpolations d'elements finis en utilisant des méthodes de particules 

      Huerta, Antonio; Fernández Méndez, Sonia; Díez, Pedro (2002-11)
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      Accés obert
      In the framework of meshless methods the interpolation is based on a distribution of particles : it is not necessary to define connectivities. In this methods the interpolation can be easily enriched, increasing the number ...
    • Equilibrated patch recovery error estimates: simple and accurate upper bounds of the error 

      Díez, Pedro; Ródenas García, Juan José; Zienkiewicz, Olgierd Cecil (Wiley and Sons, 2007-03)
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      Accés obert
      This paper introduces a new recovery-type error estimator ensuring local equilibrium and yielding a guaranteed upper bound of the error. The upper bound property requires the recovered solution to be both statically ...
    • Error assessment and mesh adaptivity for regularized continuous failure models 

      Pannachet, T.; Díez, Pedro; Askes, Harm; Sluys, L. J. (2009-11-26)
      Article
      Accés obert
      This paper deals with the adaptive finite element analysis of structural failure. A gradient-enhanced damage model has been chosen to simulate material degradation. Since this model is regularized in the post-peak regime, ...
    • Error assessment for timeline-dependent quantities of interest in transient elastodynamics 

      Verdugo, Francesc; Parés Mariné, Núria; Díez, Pedro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
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      This work presents a new approach to assess the error in speci c quantities of interest in the framework of linear elastodynamics. In particular, a new type of quantities of interest (referred as timeline-dependent ...
    • Error assessment in structural transient dynamics 

      Verdugo Rojano, Francesc; Parés Mariné, Núria; Díez, Pedro (2014-03-01)
      Article
      Accés obert
      This paper presents in a unified framework the most representative state-of-the-art techniques on a posteriori error assessment for second order hyperbolic problems, i.e., structural transient dynamics. For the sake of ...
    • Error estimation and adaptivity for nonlinear FE analysis 

      Huerta, Antonio; Rodríguez Ferran, Antonio; Díez, Pedro (2002-03)
      Article
      Accés obert
      An adaptive strategy for nonlinear finite-element analysis, based on the combination of error estimation and h-remeshing, is presented. Its two main ingredients are a residual-type error estimator and an unstructured ...
    • Error estimation and adaptivity for PGD based on complementary solutions applied to a simple 1D problem 

      Reis, Jonatha; Almeida, José Paulo Moitinho de; Díez, Pedro; Zlotnik, Sergio (Springer, 2020-10-30)
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      Accés obert
      Reduced order methods are powerful tools for the design and analysis of sophisticated systems, reducing computational costs and speeding up the development process. Among these reduced order methods, the Proper Generalized ...
    • Error estimation and quality control 

      Díez, Pedro; Parés Mariné, Núria; Huerta, Antonio (John Wiley & sons, 2010-12-15)
      Capítol de llibre
      Accés restringit per política de l'editorial
    • Error estimation for adaptive computations on shell structures 

      Díez, Pedro; Huerta, Antonio (2000-03)
      Article
      Accés obert
      The finite element discretization of a shell structure introduces two kinds of errors: the error in the functional approximation and the error in the geometry approximation. The first is associated with the finite dimensional ...