Now showing items 1-9 of 9

  • A recursive approach to multiscalar data interpolation of sparsely sampled sea surface measurements at different spatial resolutions 

    Reig Bolano, Ramon; Garcia Ladona, E.; Parisi Baradad, Vicenç; Marti Puig, Pere (2008)
    Conference report
    Restricted access - publisher's policy
    In many oceanographic studies there is a need to reconstruct a signal from a set of sparse measurements. We propose an algorithm to iteratively approximate the intermediate values between irregularly sampled data, when ...
  • Efficient Computation of Sparse Matrix Functions for Large-Scale Electronic Structure Calculations: The CheSS Library 

    Mohr, Stephan; Dawson, William; Wagner, Michael; Caliste, Damien; Nakajima, Takahito; Genovese, Luigi (American Chemical Society, 2017-09-05)
    Article
    Open Access
    We present CheSS, the “Chebyshev Sparse Solvers” library, which has been designed to solve typical problems arising in large-scale electronic structure calculations using localized basis sets. The library is based on a ...
  • Frequency extrapolation of IE-MEI linear system Coefficients in 2D 

    Rius Casals, Juan Manuel; Heldring, Alexander; Úbeda Farré, Eduard (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Restricted access - publisher's policy
    The Integral Equation MEI (IE-MEI) method for the sparsification of Method of Moments linear system matrix is revisited here. It achieves cpu computation time and storage memory requirements of order O(N ) (for 2D perfectly ...
  • Further insight into the measured equation of invariance EM theory 

    Mei, K.K.; Pous Andrés, Rafael; Prouty, M.D.; Liu, Y.W. (. IEEE AP-S SYMPOSIUM DIGEST, 1990)
    Conference report
    Open Access
    The measured equation of invariance (MEI) is a concept in field computation which leads to the generation of local linear equations in lieu of absorption conditions to terminate finite difference or finite element equations. ...
  • Implementación eficiente de una formulación semirrecursiva para la dinámica de sistemas multicuerpo de gran tamaño 

    Hidalgo, A.F.; García de Jalón, J. (Universitat Politècnica de Catalunya. CIMNE, 2013)
    Article
    Open Access
    Este artículo presenta la implementación eficiente de una formulación dinámica semirrecursiva para la simulación de sistemas multicuerpo de gran tamaño y complejidad, con especiales aplicaciones en el campo de la automoción ...
  • Integral formulation of the measured equation of invariance 

    Rius Casals, Juan Manuel (Institution of Electrical Engineers, 1996-01)
    Article
    Open Access
    A novel integral formulation of the measured equation of invariance is derived from the reciprocity theorem. This formulation leads to a sparse matrix equation for the induced surface current, resulting in great CPU time ...
  • Sparse unifrac algorithm for the study of microbial beta diversity 

    Ansuategui Vicente, Juan (Universitat Politècnica de Catalunya, 2012)
    Bachelor thesis
    Restricted access - confidentiality agreement
  • The measured equation of invariance and its application to transmission line modelling 

    Pous Andrés, Rafael; Prouty, M.D.; Mei, K.K. (. WORSHOP PROCEEDINGS, 1993)
    Conference report
    Open Access
    The Measured Equation of Invariance (MEI) is a geometry-dependent Finite Difference equation that can be used to terminate a mesh extremely close to the object of interest. The mesh can be terminated much closer than what ...
  • The theoretical error in the integral equation mei 

    Rius Casals, Juan Manuel; Carpintero, C Pérez; Cardama Aznar, Ángel; Mosig, J R (Institution of Electrical Engineers, 1996-11)
    Article
    Open Access
    The theoretical, or non-numerical error in the integral equation MEI (IE-MEI) is analysed and compared to the numerical error in the method of moments (MoM). It is found that, although this error does not decrease with the ...