Now showing items 1-20 of 40

    • A case for malleable thread-level linear algebra libraries: The LU factorization with partial pivoting 

      Catalán Pallarés, Sandra; Herrero Zaragoza, José Ramón; Quintana Ortí, Enrique Salvador; Rodríguez Sánchez, Rafael; Van De Geijn, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2019-01-31)
      Article
      Open Access
      We propose two novel techniques for overcoming load-imbalance encountered when implementing so-called look-ahead mechanisms in relevant dense matrix factorizations for the solution of linear systems. Both techniques target ...
    • A framework for efficient execution of matrix computations 

      Herrero Zaragoza, José Ramón (Universitat Politècnica de Catalunya, 2006-07-07)
      Doctoral thesis
      Open Access
      Matrix computations lie at the heart of most scientific computational tasks. The solution of linear systems of equations is a very frequent operation in many fields in science, engineering, surveying, physics and ...
    • A highly parallel algorithm for computing the action of a matrix exponential on a vector based on a multilevel Monte Carlo method 

      Acebrón de Torres, Juan A.; Herrero Zaragoza, José Ramón; Monteiro, José (2020-01-01)
      Article
      Open Access
      A novel algorithm for computing the action of a matrix exponential over a vector is proposed. The algorithm is based on a multilevel Monte Carlo method, and the vector solution is computed probabilistically generating ...
    • A new generation of task-parallel algorithms for matrix inversion in many-threaded CPUs 

      Catalán Pallarés, Sandra; Igual Peña, Francisco D.; Rodríguez Sánchez, Rafael; Herrero Zaragoza, José Ramón; Quintana Ortí, Enrique Salvador (Association for Computing Machinery (ACM), 2021)
      Conference report
      Open Access
      We take advantage of the new tasking features in OpenMP to propose advanced task-parallel algorithms for the inversion of dense matrices via Gauss-Jordan elimination. Our algorithms perform a partitioning of the matrix ...
    • A path-level exact parallelization strategy for sequential simulation 

      Peredo Andrade, Oscar Francisco; Baeza, Daniel; Ortiz, Julian; Herrero Zaragoza, José Ramón (2018-01-01)
      Article
      Open Access
      Sequential Simulation is a well known method in geostatistical modelling. Following the Bayesian approach for simulation of conditionally dependent random events, Sequential Indicator Simulation (SIS) method draws simulated ...
    • A proposal to develop and assess professional skills in Engineering Final Year Projects 

      Sánchez Carracedo, Fermín; Climent Vilaró, Joan; Corbalán González, Julita; Fonseca Casas, Pau; García Almiñana, Jordi; Herrero Zaragoza, José Ramón; Rodríguez Hontoria, Horacio; Sancho Samsó, María Ribera (Tempus Publications, 2018-03)
      Article
      Restricted access - publisher's policy
      In this paper we discuss the result of piloting a methodology for Engineering Final Year Projects (FYP) assessment that takes into consideration professional skills acquisition. The FYP is structured around three milestones; ...
    • A square block format for symmetric band matrices 

      Gustavson, Fred G.; Herrero Zaragoza, José Ramón; Morancho Llena, Enrique (Springer, 2014)
      Conference report
      Open Access
      This contribution describes a Square Block, SB, format for storing a banded symmetric matrix. This is possible by rearranging “in place” LAPACK Band Layout to become a SB layout: store submatrices as a set of square blocks. ...
    • Acceleration of the Geostatistical Software Library (GSLIB) by code optimization and hybrid parallel programming 

      Peredo Andrade, Oscar Francisco; Ortiz, Julián; Herrero Zaragoza, José Ramón (2015-12-01)
      Article
      Open Access
      The Geostatistical Software Library (GSLIB) has been used in the geostatistical community for more than thirty years. It was designed as a bundle of sequential Fortran codes, and today it is still in use by many practitioners ...
    • Acceleration strategies for large-scale sequential simulations using parallel neighbour search: Non-LVA and LVA scenarios 

      Peredo Andrade, Oscar Francisco; Herrero Zaragoza, José Ramón (2022-03)
      Article
      Open Access
      This paper describes the application of acceleration techniques into existing implementations of Sequential Gaussian Simulation and Sequential Indicator Simulation. These implementations might incorporate Locally Varying ...
    • Conceptes avançats de sistemes operatius 

      Herrero Zaragoza, José Ramón; Martorell Bofill, Xavier; Torres Viñals, Jordi (Edicions UPC, 2002)
      Book
      Restricted access to the UPC academic community
      Aquesta edició correspon a la documentació de suport a l'alumne en format transparències on s'amplia la formació dels alumnes pel que fa als sistemes operatius, com ara la comunicació entre processos, i afegir-hi conceptes ...
    • CONTROL I AUTOMATITZACIÓ INDUSTRIAL AVANÇATS (Examen 1r quadrimestre, 2n parcial) 

      Herrero Zaragoza, José Ramón (Universitat Politècnica de Catalunya, 2014-01-14)
      Exam
      Restricted access to the UPC academic community
    • Echo state hoeffding tree learning 

      Marrón Vida, Diego; Read, Jesse; Bifet Figuerol, Albert Carles; Abdessalem, Talel; Ayguadé Parra, Eduard; Herrero Zaragoza, José Ramón (Microtome Publishing, 2016)
      Conference report
      Restricted access - publisher's policy
      Nowadays, real-time classi cation of Big Data streams is becoming essential in a variety of application domains. While decision trees are powerful and easy{to{deploy approaches for accurate and fast learning from data ...
    • Efficient update of determinants for many-electron wave function overlaps 

      Alonso Jordá, Pedro; Davidovic, Davor; Sapunar, Marin; Herrero Zaragoza, José Ramón; Quintana Ortí, Enrique Salvador (2021-01)
      Article
      Open Access
      The calculation of overlaps between many-electron wave functions at different nuclear geometries during nonadiabatic dynamics simulations requires the evaluation of a large number of determinants of matrices that differ ...
    • Elaboració d’un pla de tutories per a la FIB 

      Mora Giné, Mercè; Castell Ariño, Núria; Fernández Ruzafa, José; Herrero Zaragoza, José Ramón; Sánchez Carracedo, Fermín; Martínez Parra, Conrado; Nonell i Torrent, Ramon; Raventós Pagès, Ruth; Rius Carrasco, Roser (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013-02-08)
      Conference report / Conference lecture
      Open Access
      La majoria d'estudiants que accedeixen a la universitat, i en concret a la FIB, no són conscients del que comporta cursar una carrera universitària. Els estudis universitaris requereixen molta dedicació. Sovint els ...
    • Estudio y evaluación de formatos de almacenamiento para matrices dispersas en arquitecturas multi-core 

      Pasarin, Marc; Otero Calviño, Beatriz; Herrero Zaragoza, José Ramón (2011-11-01)
      Research report
      Open Access
    • Evaluación del Trabajo de Fin de Grado 

      Sánchez Carracedo, Fermín; Climent Vilaró, Joan; Corbalán González, Julita; Fonseca Casas, Pau; García Almiñana, Jordi; Herrero Zaragoza, José Ramón; Llinàs Audet, Francisco Javier; Rodríguez Hontoria, Horacio; Sancho Samsó, María Ribera (Universitat Jaume I. Escola Superior de Tecnologia i Ciències Experimentals, 2013-07-10)
      Conference report
      Open Access
      Los Proyectos de Fin de Carrera (PFC) se han evaluado tradicionalmente a partir de una memoria y de una presentación pública. Esta evaluación, en general, la realiza un tribunal formado por varios profesores, que juzga ...
    • Evaluation and assessment of professional skills in the Final Year Project 

      Sánchez Carracedo, Fermín; Climent Vilaró, Joan; Corbalán González, Julita; Fonseca Casas, Pau; García Almiñana, Jordi; Herrero Zaragoza, José Ramón; Llinàs Audet, Francisco Javier; Rodríguez Hontoria, Horacio; Sancho Samsó, María Ribera; Alier Forment, Marc; Cabré Garcia, José M.; López Álvarez, David (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Open Access
      In this paper, we present a methodology for Final Year Project (FYP) monitoring and assessment that considers the inclusion of the professional skills required in the particular engineering degree. This proper monitoring ...
    • Fine-grain task-parallel algorithms for matrix factorizations and inversion on many-threaded CPUs 

      Catalán Pallarés, Sandra; Herrero Zaragoza, José Ramón; Igual Peña, Francisco D.; Quintana Ortí, Enrique Salvador; Rodríguez Sánchez, Rafael (Wiley (John Wiley & Sons), 2022-04-07)
      Article
      Open Access
      We extend a two-level task partitioning previously applied to the inversion of dense matrices via Gauss–Jordan elimination to the more challenging QR factorization as well as the initial orthogonal reduction to band form ...
    • FÍSICA (Examen 1r quadrimestre, 2n parcial) 

      Herrero Zaragoza, José Ramón (Universitat Politècnica de Catalunya, 2014-01-13)
      Exam
      Restricted access to the UPC academic community
    • FÍSICA (Examen 1r quadrimestre, 2n parcial) 

      Herrero Zaragoza, José Ramón; Sellarès González, Jordi (Universitat Politècnica de Catalunya, 2013-01-11)
      Exam
      Restricted access to the UPC academic community