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Browsing by Author "Alonso Jordá, Pedro"

Now showing items 1-20 of 59

A multicore solution to Block-Toeplitz linear systems of equations

Alonso-Jordá, Pedro; Argüelles, Daniel; Ranilla, José; Vidal Maciá, Antonio Manuel (Springer Verlag (Germany), 2013-09)

There exist algorithms, also called "fast" algorithms, which exploit the special structure of Toeplitz matrices so that, e.g., allow to solve a linear system of equations in O(n2) flops. However, some implementations of ...
A new efficient and accurate spline algorithm for the matrix exponential computation

Defez Candel, Emilio; Ibáñez González, Jacinto Javier; Sastre, Jorge; Peinado Pinilla, Jesús; Alonso-Jordá, Pedro (Elsevier, 2018)

[EN] In this work an accurate and efficient method based on matrix splines for computing matrix exponential is given. An algorithm and a MATLAB implementation have been developed and compared with the state-of-the-art ...
A Pipeline for the QR Update in Digital Signal Processing

Dolz, Manuel F.; Alventosa, Fran J.; Alonso-Jordá, Pedro; Vidal Maciá, Antonio Manuel (John Wiley & Sons, 2019)

[EN] The input and output signals of a digital signal processing system can often be represented by a rectangular matrix as it is the case of the beamformer algorithm, a very useful particular algorithm that allows extraction ...
A pipeline structure for the block QR update in digital signal processing

Dolz, Manuel F.; Alventosa, Fran J.; Alonso-Jordá, Pedro; Vidal Maciá, Antonio Manuel (Springer-Verlag, 2019)

[EN] There exist problems in the field of digital signal processing, such as filtering of acoustic signals that require processing a large amount of data in real time. The beamforming algorithm, for instance, is a process ...
Accelerating Multi-Channel Filtering of Audio Signal on ARM Processors

Belloch Rodríguez, José Antonio; Alventosa, Fran J.; Alonso-Jordá, Pedro; Quintana Ortí, Enrique Salvador; Vidal Maciá, Antonio Manuel (Springer Verlag (Germany), 2017-01)

Tablets and smart phones are nowadays equipped with low-power processor architectures such as the ARMv7 and the ARMv8 series. These processors integrate powerful SIMD units to exploit the intrinsic data-parallelism of ...
Algoritmos de imagen y sonido digital con restricciones de tiempo real

Alventosa Rueda, Francisco Javier (Universitat Politècnica de València, 2022-02-28)

[ES] En la actualidad, cada vez existen más y más tareas que necesitamos exportar y automatizar en dispositivos portables de bajo consumo que se alimentan de baterías, en los cuales es imprescindible realizar un uso ...
An efficient and accurate algorithm for computing the matrix cosine based on New Hermite approximations

Defez Candel, Emilio; Ibáñez González, Jacinto Javier; Peinado Pinilla, Jesús; Sastre, Jorge; Alonso-Jordá, Pedro (Elsevier, 2019-03-01)

[EN] In this work we introduce new rational-polynomial Hermite matrix expansions which allow us to obtain a new accurate and efficient method for computing the matrix cosine. This method is compared with other state-of-the-art ...
An efficient musical accompaniment parallel system for mobile devices

Alonso-Jordá, Pedro; Vera-Candeas, P.; Cortina, Raquel; Ranilla, José (Springer-Verlag, 2017-01)

[EN] This work presents a software system designed to track the reproduction of a musical piece with the aim to match the score position into its symbolic representation on a digital sheet. Into this system, known as ...
Aplicación para el análisis, estudio y publicación del comportamiento en la utilización de Valenbisi

Llinares Llinares, Jordi (Universitat Politècnica de València, 2019-10-30)

[ES] El trabajo realizado en este TFM ha consistido en realizar una aplicación que mediante el análisis de datos de los datos recopilados mediante la plataforma API APP CIUDAD obtenga unos resultados y los proporcione ...
Aprovechamiento del paralelismo de tareas en factorizaciones de matrices jerárquicas sobre procesadores multinúcleo

Carratalá Sáez, Rocío (Universitat Politècnica de València, 2016-09-02)

[EN] Hierarchical matrices are a numerical tool for representing, in a sparse way and in a linear-logarithmic storage cost, dense problems that arise in integral and partial differential equations. For some basic linear ...
Assessing power monitoring approaches for energy and power analysis of computers

Diouri, Mohammed El Mehdi; Dolz Zaragozá, Manuel Francisco; Glück, Olivier; Lefèvre, Laurent; Alonso-Jordá, Pedro; Catalán, Sandra; Mayo, Rafael; Quintana Ortí, Enrique Salvador (Elsevier, 2014-06)

Large-scale distributed systems (e.g., datacenters, HPC systems, clouds, large-scale networks, etc.) con- sume and will consume enormous amounts of energy. Therefore, accurately monitoring the power dissipation and energy ...
Automatic routine tuning to represent landform attributes on multicore and multi-GPU systems

DO CARMO BORATTO, MURILO; Alonso-Jordá, Pedro; Giménez Cánovas, Domingo; Barreto, Marcos (Springer Verlag (Germany), 2014-11)

Auto-tuning techniques have been used in the design of routines in recent years. The goal is to develop routines which automatically adapt to the conditions of the computational system in such a way that efficient executions ...
Automatic Tuning to Performance Modelling of Matrix Polynomials on Multicore and Multi-GPU Systems

Boratto, Murilo; Alonso-Jordá, Pedro; Gimenez, Domingo; Lastovetsky, Alexey (Springer-Verlag, 2017-01)

[EN] Automatic tuning methodologies have been used in the design of routines in recent years. The goal of these methodologies is to develop routines which automatically adapt to the conditions of the underlying computational ...
Block pivoting implementation of a symmetric Toeplitz solver

Alonso-Jordá, Pedro; Dolz Zaragozá, Manuel Francisco; Vidal Maciá, Antonio Manuel (Elsevier, 2014-05-01)

Toeplitz matrices are characterized by a special structure that can be exploited in order to obtain fast linear system solvers. These solvers are difficult to parallelize due to their low computational cost and their closely ...
Computing Matrix Trigonometric Functions with GPUs through Matlab

Alonso-Jordá, Pedro; Peinado Pinilla, Jesús; Ibáñez González, Jacinto Javier; Sastre, Jorge; Defez Candel, Emilio (Springer-Verlag, 2019-03)

[EN] This paper presents an implementation of one of the most up-to-day algorithms proposed to compute the matrix trigonometric functions sine and cosine. The method used is based on Taylor series approximations which ...
Desarrollo y evaluación de los esquemas de paralelización de datos y de modelo para el entrenamiento de redes neuronales convolucionales

Catalán Carbó, Mar (Universitat Politècnica de València, 2020-09-04)

[ES] En los últimos años, las Redes Neuronales Profundas (RNPs) han resurgido debido a la confluencia de tres importantes factores: i) la avalancha de datos disponibles (big data), que incrementan la robustez de las RNPs; ...
Desarrollo y paralelización del algoritmo de convolución rápida de Winograd sobre plataformas ARM de bajo consumo.

Cuadrillero Geer, Duero Joshua (Universitat Politècnica de València, 2021-12-28)

[ES] Los avances en el diseño y desarrollo de redes neuronales convolucionales profundas, así como el incremento de la precisión de las mismas en el campo de la visión artificial, ha supuesto su amplia adopción en un gran ...
DVFS-control techniques for dense linear algebra operations on multi-core processors

Alonso-Jordá, Pedro; Dolz Zaragozá, Manuel Francisco; Igual, Francisco D.; Mayo, Rafael; Quintana Ortí, Enrique Salvador (Springer Verlag (Germany), 2012-11)

[EN] This paper analyzes the impact on power con- sumption of two DVFS-control strategies when applied to the execution of dense linear algebra operations on multi- core processors. The strategies considered here, prototyped ...
Efficient and accurate algorithms for computing matrix trigonometric functions

Alonso-Jordá, Pedro; Ibáñez González, Jacinto Javier; Sastre Martinez, Jorge; Peinado Pinilla, Jesús; Defez Candel, Emilio (Elsevier, 2017-01)

[EN] Trigonometric matrix functions play a fundamental role in second order differential equations. This work presents an algorithm based on Taylor series for computing the matrix cosine. It uses a backward error analysis ...
Efficient Simulation of Spatio-temporal Dynamics in Ultrasonic Resonators

Alonso-Jordá, Pedro; Peinado Pinilla, Jesús; Pérez Arjona, Isabel; Sánchez Morcillo, Víctor José (Springer Verlag (Germany), 2011)

The simulation in computers of the evolution of pressure and temperature inside a cavity when acoustic energy is injected results in a very stiff and high time consuming application. The split-step method used for the ...