Ara es mostren els items 21-40 de 753

    • A mimetic wave equation discretization with absorbing boundary condition: Formulation and application 

      Solano-Feo, Freysimar; Guevara-Jordan, Juan; Rojas_Ulacio, Otilio; González-Ramirez, Carlos; Otero Calviño, Beatriz (2016)
      Text en actes de congrés
      Accés obert
      The cornerstone of mimetic finite differentiation (FD) is that discrete gradients and divergences, in combination with a novel boundary flux operator satisfies an approximation to the Gauss–Divergence theorem. In this ...
    • A modified fractional step method for fluid–structure interaction problems 

      Ryzhakov, Pavel (Universitat Politècnica de Catalunya. CIMNE, 2017)
      Article
      Accés obert
      We propose a Lagrangian fluid formulation particularly suitable for fluid–structure interaction (FSI) simulation involving free-surface flows and light-weight structures. The technique combines the features of fractional ...
    • A modified Taylor Galerkin scheme for turbulent compressible flow simulation 

      Burbridge, Horacio Pedro; Scarabino, Ana Elena; Awruch, Armando Miguel (Universitat Politècnica de Catalunya. CIMNE, 2019)
      Article
      Accés obert
      As already demonstrated by different authors, the Taylor-Galerkin (TG) scheme, in the context of the Finite Element Method (FEM), is particularly suitable for the solution of supersonic flows. The TG scheme, using hexahedral ...
    • A multi-mesh adaptive scheme for air quality modeling with the finite element method 

      Monforte, Lluis; Pérez Foguet, Agustí (2012)
      Text en actes de congrés
      Accés obert
      A multi-mesh adaptive scheme for convection-diffusion-reaction problems is presented. The proposal is applied to air quality modeling, especifically to the simulation of a pollutant punctual emissions. The performance ...
    • A multidimensional data-driven sparse identification technique: the sparse proper generalized decomposition 

      Ibáñez Pinillo, Rubén; Abisset Chavanne, Emmanuelle; Ammar, Amine; González Ibáñez, David; Cueto Prendes, Elias; Huerta, Antonio; Duval, Jean Louis; Chinesta Soria, Francisco (2018-01-01)
      Article
      Accés obert
      Sparse model identification by means of data is especially cumbersome if the sought dynamics live in a high dimensional space. This usually involves the need for large amount of data, unfeasible in such a high dimensional ...
    • A multiscale method for periodic structures using domain decomposition and ECM-hyperreduction 

      Hernández Ortega, Joaquín Alberto (2020-08-15)
      Article
      Accés obert
      This paper presents a nonlinear multiscale approach for periodic structures in the quasi-static, small strain regime. The approach consists in combining a domain decomposition method in which interface conditions are ...
    • A new 3D hybrid model for epithelial morphogenesis 

      Muñoz Romero, José (2021-03-22)
      Article
      Accés obert
      Wound healing is a biological mechanism that allows the integrity and functionality of tissues to be preserved. Dr Jose Muñoz, Associate Professor at the Laboratory of Numerical Analysis (LaCàN), Universitat Politècnica ...
    • A new adaptive method for image compression using Karhunen-Loeve transform 

      Torres Urgell, Lluís (Institute of Electrical and Electronics Engineers (IEEE), 1987)
      Text en actes de congrés
      Accés obert
      The Karhunen-Loeve transformation (KLT) is an optimal method for encoding images in the MSE sense. Only one spatially adaptive method is known to be reported in the literature. Many other suboptimal encoding methods have ...
    • A new approach for Delphi processes based on group consensus with linguistic terms 

      Agell Jané, Núria; van Ganzewinkel,, Christ Jan; Sánchez Soler, Monica; Roselló Saurí, Llorenç; Prats Duaygues, Francesc; Andriessen, Peter (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A new approach for Delphi processes including a measure of consensus based on linguistic terms is introduced in this paper. The measure of consensus involves qualitative reasoning techniques and is based on the concept ...
    • A new equilibrated residual method improving accuracy and efficiency of flux-free error estimates 

      Parés Mariné, Núria; Díez, Pedro (2017-01-01)
      Article
      Accés obert
      This paper presents a new methodology to compute guaranteed upper bounds for the energy norm of the error in the context of linear finite element approximations of the reaction–diffusion equation. The new approach revisits ...
    • A new mechanical structural damage feature index based on HHT 

      Hua, Lin; Wang, Fusheng; Yue, Zhufeng (Universitat Politècnica de Catalunya. CIMNE, 2018)
      Article
      Accés obert
      A new damage feature index is presented for the structural health monitoring based on Hilbert-Huang transform (HHT). The energy marginal spectrum of the dynamic signal is used to construct damage characteristic parameter, ...
    • A new method for computing the largest singular value and an associated right singular vector of a complex matrix 

      Carrasco, Juan A. (2023-09-28)
      Report de recerca
      Accés obert
      A new method for computing the largest singular value \xi_1 and an associated right singular vector of a large and sparse complex matrix A is developed. The method accelerates a new method for computing \xi_1 and an ...
    • A new method to determine the optimal thin layer ionospheric height and its application in the polar regions 

      Jiang, Hu; Jin, Shuanggen; Hernández Pajares, Manuel; Xi, Hui; An, Jiachun; Wang, Zemin; Xu, Xueyong; Yan, Houxuan (Multidisciplinary Digital Publishing Institute (MDPI), 2021-06-23)
      Article
      Accés obert
      In this paper, a feasibility study of a microwave antenna-based sensor is proposed for in vitro experiments for monitoring blood glucose levels. The proposed device consists of a square-ring incorporated within a fully ...
    • A new re-usable shallow foundation for light loads: load tests and analysis 

      Tarragó Munté, Daniel; Gens Solé, Antonio; Rosas, Juan José (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2017)
      Text en actes de congrés
      Accés obert
      An innovative re-usable shallow foundation system for light loads has been developed consisting of a concrete block and four steel tubes driven into the ground at different orientations. The interaction between the block, ...
    • A new spectral method for latent variable models 

      Ruffini, Matteo; Casanellas Rius, Marta; Gavaldà Mestre, Ricard (2018-05-22)
      Article
      Accés obert
      We present an algorithm for the unsupervised learning of latent variable models based on the method of moments. We give efficient estimates of the moments for two models that are well known, e.g., in text mining, the ...
    • A non-intrusive proper generalized decomposition scheme with application in biomechanics 

      Zou, Xi; Conti, Michele; Díez, Pedro; Auricchio, Ferdinando (John Wiley & Sons, 2017-09-07)
      Article
      Accés obert
      Proper generalized decomposition (PGD) is often used for multiquery and fast-response simulations. It is a powerful tool alleviating the curse of dimensionality affecting multiparametric partial differential equations. ...
    • A note on flips in diagonal rectangulations 

      Cardinal, Jean; Sacristán Adinolfi, Vera; Silveira, Rodrigo Ignacio (Chapman & Hall/CRC, 2018-11-09)
      Article
      Accés obert
      Rectangulations are partitions of a square into axis-aligned rectangles. A number of results provide bijections between combinatorial equivalence classes of rectangulations and families of pattern-avoiding permutations. ...
    • A note on the convergence of the secant method for simple and multiple roots 

      Díez, Pedro (Elsevier, 2003-11)
      Article
      Accés obert
      The secant method is one of the most popular methods for root finding. Standard text books in numerical analysis state that the secant method is super linear: the rate of convergence is set by the gold number. Never- theless, ...
    • A numerical investigation of wind tunnel model deformations caused by the twin-sting support system 

      Flores Le Roux, Roberto Maurice; Ortega, Enrique; Oñate Ibáñez de Navarra, Eugenio (2009)
      Report de recerca
      Accés obert
      This work presents a wing deformation analysis of a twin-sting-mounted commercial aircraft model. Twin-sting arrangements minimize flow disturbances around the model fuselage and tail; on the other hand, they cause important ...
    • A numerical simulation of fluid-structure interaction for flow through valves of a hermetic compressor with immersed boundary method 

      Mushyam, Aditya; Bergadà Granyó, Josep Maria (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial