Recent Submissions

  • Adaptive clock with useful jitter 

    Cortadella Fortuny, Jordi; Lavagno, Luciano; López Muñoz, Pedro; Lupon Navazo, Marc; Moreno Vega, Alberto; Roca Pérez, Antoni; Sapatnekar, Sachin S. (2015-05-19)
    External research report
    Open Access
    The growing variability in nanoelectronic devices due to uncertainties from the manufacturing process and environmental conditions (power supply, temperature, aging) requires increasing design guardbands, forcing circuits ...
  • On the complexity of exchanging 

    Molinero Albareda, Xavier; Olsen, Martin; Serna Iglesias, María José (2015-03-24)
    External research report
    Open Access
    We analyze the computational complexity of the problem of deciding whether, for a given simple game, there exists the possibility of rearranging the participants in a set of j given losing coalitions into a set of j winning ...
  • Wikicardi : hacia la extracción de oraciones paralelas de Wikipedia 

    Boldoba Trapote, Josu; Barrón Cedeño, Luis Alberto; España Bonet, Cristina (2014-03-01)
    External research report
    Open Access
    Uno de los objetivos del proyecto Tacardi (TIN2012-38523-C02-00) consiste en extraer oraciones paralelas de corpus comparables para enriquecer y adaptar traductores automáticos. En esta investigación usamos un subconjunto ...
  • Experiments on document level machine translation 

    Martínez Garcia, Eva; España Bonet, Cristina; Márquez Villodre, Luís (2014-03-03)
    External research report
    Open Access
    Most of the current SMT systems work at sentence level. They translate a text assuming that sentences are independent, but, when one looks at a well formed document, it is clear that there exist many inter sentence relations. ...
  • Extracting user spatio-temporal profiles from location based social networks 

    Béjar Alonso, Javier (2014-11-14)
    External research report
    Open Access
    Location Based Social Networks (LBSN) like Twitter or Instagram are a good source for user spatio-temporal behavior. These social network provide a low rate sampling of user's location information during large intervals ...
  • Mining frequent spatio-temporal patterns from location based social networks 

    Béjar Alonso, Javier (2014-10-09)
    External research report
    Open Access
    Location Based Social Networks (LBSN) like Twitter or Instagram are a good source for user spatio-temporal behavior. These social network provide a low rate sampling of user's location information during large intervals ...
  • Strategies and algorithms for clustering large datasets: a review 

    Béjar Alonso, Javier (2013-10-28)
    External research report
    Open Access
    The exploratory nature of data analysis and data mining makes clustering one of the most usual tasks in these kind of projects. More frequently these projects come from many different application areas like biology, text ...
  • K-means vs Mini Batch K-means: a comparison 

    Béjar Alonso, Javier (2013-05-17)
    External research report
    Open Access
    Mini Batch K-means (cite{Sculley2010}) has been proposed as an alternative to the K-means algorithm for clustering massive datasets. The advantage of this algorithm is to reduce the computational cost by not using all the ...
  • Unsupervised feature selection by means of external validity indices 

    Béjar Alonso, Javier (2013-02-12)
    External research report
    Open Access
    Feature selection for unsupervised data is a difficult task because a reference partition is not available to evaluate the relevance of the features. Recently, different proposals of methods for consensus clustering have ...
  • Event-based real-time decomposed conformance analysis 

    vanden Broucke, Seppe; Muñoz Gama, Jorge; Carmona Vargas, Josep; Baesens, Bart; Vanthienen, Jan (2013-12-13)
    External research report
    Open Access
    Process mining deals with the extraction of knowledge from event logs. One important task within this research field is denoted as conformance checking, which aims to diagnose deviations and discrepancies between modeled ...

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