Enviaments recents

  • Pre-processing techniques for improved detection of vocalization sounds in a neonatal intensive care unit 

    Raboshchuk, Ganna; Nadeu Camprubí, Climent; Vidiella Pinto, Sergio; Ros Fornells, Oriol; Muñoz Mahamud, Blanca; Riverola de Veciana, Ana (2018-01-01)
    Article
    Accés restringit per política de l'editorial
    The sounds occurring in the noisy acoustical environment of a Neonatal Intensive Care Unit (NICU) are thought to affect the growth and neurodevelopment of preterm infants. Automatic sound detection in a NICU is a novel and ...
  • Generación morfológica con algoritmos de aprendizaje profundo integrada en un sistema de traducción automática estadística 

    Escolano, Carlos; Ruiz Costa-Jussà, Marta (2017-09-22)
    Article
    Accés obert
    La variación morfológica entre un lenguaje fuente y el lenguaje destino genera dificultades a los algoritmos estándares de traducción como el estadístico basado en segmentos. En este trabajo planteamos dividir la tarea de ...
  • Coverage for character based neural machine translation 

    Kazimi, Bashir; Ruiz Costa-Jussà, Marta (2017-09-22)
    Article
    Accés obert
    In recent years, Neural Machine Translation (NMT) has achieved state-of-the-art performance in translating from a language; source language, to another; target language. However, many of the proposed methods use word ...
  • DeepVoice: tecnologías de aprendizaje profundo aplicadas al procesado de voz y audio 

    Ruiz Costa-Jussà, Marta; Rodríguez Fonollosa, José Adrián (2017-09-22)
    Article
    Accés obert
    Este proyecto propone el desarrollo de nuevas arquitecturas para el procesado de la voz y el audio mediante métodos de aprendizaje profundo, explorando también nuevas aplicaciones y dando continuidad al trabajo inicial del ...
  • Gap solitons on a ring 

    Kartashov, Yaroslav V.; Malomed, B A; Vysloukh, Victor A.; Torner Sabata, Lluís (2008-12)
    Article
    Accés restringit per política de l'editorial
    We introduce a new species of gap solitons (GSs) supported by an azimuthally modulated guiding ring in defocusing cubic media. The periodicity in the azimuthal direction strongly modifies properties and existence domains ...
  • Four-wave mixing of light beams with engineered orbital angular momentum in cold cesium atoms 

    Barreiro, S; Tabosa, J W R; Pérez Torres, Juan; Deyanova, Y; Torner Sabata, Lluís (2004-07)
    Article
    Accés restringit per política de l'editorial
    We report an experimental demonstration that shows that the spatial structure carried by engineered coherent superpositions of light beams with orbital angular momentum can be mapped into the nonlinear polarization induced ...
  • Orbital angular momentum of entangled counterpropagating photons 

    Pérez Torres, Juan; Osorio Tamayo, Clara Inés; Torner Sabata, Lluís (2004-08)
    Article
    Accés restringit per política de l'editorial
    We elucidate the paraxial orbital angular momentum of entangled photon pairs generated by spontaneous parametric downconversion in different noncollinear geometries in which the entangled photons counterpropagate. We find, ...
  • Soliton eigenvalue control in optical lattices 

    Kartashov, Yaroslav V.; Crasovan, L C; Zelenina, A; Vyslokh, V V; Sanpera, Anna; Lewenstein, Maciej; Torner Sabata, Lluís (2004-09)
    Article
    Accés restringit per política de l'editorial
    We address the dynamics of higher-order solitons in optical lattices, and predict their self-splitting into the set of their single-soliton constituents. The splitting is induced by the potential introduced by the lattice, ...
  • Second harmonic generation tuning curves in quasiphase-matched potassium titanyl phosphate with narrow, high-intensity beams 

    Katz, M; Eger, D; Kim, H; Jankovic, L; Stegeman, G; Carrasco Rodríguez, Sílvia; Torner Sabata, Lluís (American Institute of Physics (AIP), 2003-06)
    Article
    Accés restringit per política de l'editorial
    The second harmonic generation (SHG) tuning curves with temperature and angle of incidence were measured in periodically poled KTiOPO4 for narrow fundamental beams at intensities typical of quadratic soliton generation. ...
  • Observation of optical vortex streets in walking-second harmonic generation 

    Molina Terriza, Gabriel; Dmitri, V Petrov; Recolons Martos, Jaume; Torner Sabata, Lluís (2002-04-15)
    Article
    Accés restringit per política de l'editorial
    We report what is believed to be the first experimental observation of spontaneous nucleation of arrays of optical vortices in the process of second-harmonic generation in a crystal with moderate Poynting vector walk-off, ...

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