The Cosmic Microwave Background (CMB) is a diffuse radiation which is contaminated by the radiation emitted by point sources. The precise knowledge of CMB fluctuations can lead to a better knowledge of the chemistry at the ...
Soriano Benegas, Eusebio(Universitat Politècnica de València, 2018-01-03)
[ES] Actualmente la generación y el tratamiento de datos masivos se ha convertido
en un desafío importante en el campo de la Informática. La cantidad de
datos generados en muchos procesos informáticos supera la capacidad ...
Alvarruiz Bermejo, Fernando; Martínez Alzamora, Fernando; Vidal Maciá, Antonio Manuel(American Society of Civil Engineers, 2018)
[EN] This paper presents a novel approach to model pressure- and flow-regulating devices in the context of the Newton-Raphson loop method for water distribution network simulation. The proposed approach uses a symmetric ...
[EN] Hydraulic solvers for the simulation of flows and pressures in water distribution
systems (WDS) are used extensively, and their computational performance is key when
considering optimization problems. This paper ...
Cámara, Jesús; Cuenca, Javier; Giménez, Domingo; García, Luis Pedro; Vidal Maciá, Antonio Manuel(Springer Verlag (Germany), 2014-06)
The introduction of auto-tuning techniques in linear algebra shared-memory routines is analyzed. Information obtained in the installation of the routines is used at running time to take some decisions to reduce the total ...
San Juan Sebastián, Pablo; Vidal Maciá, Antonio Manuel; García Mollá, Víctor Manuel; Martínez Zaldívar, Francisco José; Ranilla, J.; Alonso, P.; Alonso-González, M.; Cortina, R.(CMMSE, 2015-07)
[EN] NnmfPack is a numerical library designed to compute efficiently the
Non-Negative Matrix Factorization (NNMF). It has been conceived for
shared memory heterogeneous parallel systems, and it supports, from its
conception, ...
Gracia Gil, Leandro(Universitat Politècnica de València, 2011-11-28)
Adaptación e implementación del algoritmo de extracción de valores propios shift-and-invert
2-way Lanczos aplicado a matrices Toeplitz simétricas usando entorno de
programación paralela en GPUs CUDA.
Alventosa, Fran J.; Alonso-Jordá, Pedro; Vidal Maciá, Antonio Manuel; Piñero, Gema; Quintana-Ortí, Enrique S.(Springer-Verlag, 2019-03)
[EN] The processing of digital sound signals often requires the computation of the QR factorization of a rectangular system matrix. However, sometimes, only a given (and probably small) part of the system matrix varies ...
Roger Varea, Sandra; Ramiro Sánchez, Carla; González Salvador, Alberto; Almenar Terré, Vicenç; Vidal Maciá, Antonio Manuel(Institute of Electrical and Electronics Engineers (IEEE), 2012-10)
Multicore and graphic processing units (GPUs) can be combined to efficiently implement signal-processing algorithms for communication systems, due to their parallel processing capabilities. This paper proposes a fully ...
García Mollá, Víctor Manuel; San Juan-Sebastian, Pablo; Virtanen, T.; Vidal Maciá, Antonio Manuel; Alonso-Jordá, Pedro(Elsevier, 2019)
[EN] In this paper, we propose, describe, and test a modification of the K-SVD algorithm. Given a set of training data, the proposed algorithm computes an overcomplete dictionary by minimizing the ß-divergence () between ...
Belloch Rodríguez, José Antonio; Ferrer Contreras, Miguel; Gonzalez, Alberto; Martínez Zaldívar, Francisco José; Vidal Maciá, Antonio Manuel(Audio Engineering Society, 2013-08)
[EN] Multichannel audio signal processing has undergone major development in recent years. The incorporation of spatial information into an immersive audiovisual virtual environment or into video games provides a better ...
Martínez Zaldívar, Francisco José; Vidal Maciá, Antonio Manuel; Giménez Cánovas, Domingo(Springer Verlag (Germany), 2011-11)
[EN] This paper describes a pipelined parallel algorithm for the MMSE-OSIC decoding procedure proposed in V-BLAST wireless MIMO systems, for heterogeneous networks of processors. It is based on a block version of the ...
Lopez-Espin, Jose J; Vidal Maciá, Antonio Manuel; Gimenez, Domingo(Elsevier, 2014-01)
Simultaneous equations models can be solved with a variety of algorithms. Some methods use the QR-decomposition of several matrices associated to the equations in the system. To accelerate the computation of those ...
Jozsa, Csaba M; Domene Oltra, Fernando; Vidal Maciá, Antonio Manuel; Piñero Sipán, María Gemma; González Salvador, Alberto(Springer Verlag (Germany), 2014-11)
The lattice reduction (LR) technique has become very important in many engineering fields. However, its high complexity makes difficult its use in real-time applications, especially in applications that deal with large ...
San Juan Sebastián, Pablo(Universitat Politècnica de València, 2018-11-26)
Muchos problemas procedentes de aplicaciones del mundo real pueden ser modelados como problemas matemáticos con magnitudes no negativas, y por tanto, las soluciones de estos problemas matemáticos solo tienen sentido si son ...
García Mollá, Víctor Manuel; Vidal Maciá, Antonio Manuel; González Salvador, Alberto; Roger Varea, Sandra(Elsevier, 2014-05)
Sphere Decoding is a popular Maximum Likelihood algorithm that can be used to detect
signals coming from multiple-input, multiple-output digital communication systems. It is
well known that the complexity required to ...
Díaz-Gracia, N.; Cocaña-Fernández, A.; Alonso-González, M:; Martínez Zaldívar, Francisco José; Cortina, Raquel; García Mollá, Víctor Manuel; Alonso, P.; Ranilla, J.; Vidal Maciá, Antonio Manuel(Springer Verlag (Germany), 2015-05)
NnmfPack is a library for the nonnegative matrix factorization (NNMF) problem. Nowadays NNMF is an essential tool in many fields spanning machine learning, data analysis, image analysis or audio source separation, among ...
Alvarruiz Bermejo, Fernando; Martínez Alzamora, Fernando; Vidal Maciá, Antonio Manuel(American Society of Civil Engineers, 2015-10)
Efficiency of hydraulic solvers for the simulation of flows and pressures in water distribution systems (WDSs) is very important, especially in the context of optimization and risk analysis problems, where the hydraulic ...
Hydraulic solvers for the simulation of flows and pressures in water distribution
systems (WDS) are used extensively, and their computational performance is key
when considering optimization problems. This paper presents ...