Now showing items 13-24 of 143

    • Incorporation of acoustic sensors in the regulation of a mobile robot 

      Luna Aguilar, Christian Alejandro; Morales Diaz, América; Castelán, Mario; Nadeu Camprubí, Climent (2019-01-17)
      Article
      Open Access
      This article introduces the incorporation of acoustic sensors for the localization of a mobile robot. The robot is considered as a sound source and its position is located applying a Time Delay of Arrival (TDOA) method. ...
    • Knowledge sharing in the health scenario 

      LLuch Ariet, Magi; Brugues de la Torre, Albert; Vallverdú Bayés, Sisco; Pegueroles Vallés, Josep R. (2014-11-28)
      Article
      Open Access
      The understanding of certain data often requires the collection of similar data from different places to be analysed and interpreted. Interoperability standards and ontologies, are facilitating data interchange around the ...
    • The use of long-term features for GMM- and i-vector-based speaker diarization systems 

      Zewoudie, Abraham Woubie; Luque, Jordi; Hernando Pericás, Francisco Javier (2018-09-26)
      Article
      Open Access
      Several factors contribute to the performance of speaker diarization systems. For instance, the appropriate selection of speech features is one of the key aspects that affect speaker diarization systems. The other factors ...
    • Detection and description of the different ionospheric disturbances that appeared during the solar eclipse of 21 August 2017 

      Yang, Heng; Monte Moreno, Enrique; Hernández Pajares, Manuel (Multidisciplinary Digital Publishing Institute (MDPI), 2018-10-30)
      Article
      Open Access
      This work will provide a detailed characterization of the travelling ionospheric disturbances (TIDs) created by the solar eclipse of 21 August 2017, the shadow of which crossed the United States from the Pacific to the ...
    • Economic uncertainty: a geometric indicator of discrepancy among experts’ expectations 

      Claveria González, Oscar; Monte Moreno, Enrique; Torra Porras, Salvador (2018-01-01)
      Article
      Open Access
      In this study we present a geometric approach to proxy economic uncertainty. We design a positional indicator of disagreement among survey-based agents’ expectations about the state of the economy. Previous dispersion-based ...
    • TEC forecasting based on manifold trajectories 

      Monte Moreno, Enrique; García Rigo, Alberto; Hernández Pajares, Manuel; Yang, Heng (Multidisciplinary Digital Publishing Institute (MDPI), 2018-06-22)
      Article
      Open Access
      In this paper, we present a method for forecasting the ionospheric Total Electron Content (TEC) distribution from the International GNSS Service’s Global Ionospheric Maps. The forecasting system gives an estimation of the ...
    • N-gram-based machine translation 

      Mariño Acebal, José Bernardo; Banchs, Rafael E.; Crego, Josep Maria; Gispert Ramis, Adrià de; Lambert, Patrik; Rodríguez Fonollosa, José Adrián; Ruiz Costa-Jussà, Marta (2006-12-01)
      Article
      Open Access
      This article describes in detail an n-gram approach to statistical machine translation. This ap- proach consists of a log-linear combination of a translation model based on n-grams of bilingual units, which are referred ...
    • From feature to paradigm: deep learning in machine translation 

      Ruiz Costa-Jussà, Marta (2018-04-01)
      Article
      Open Access
      In the last years, deep learning algorithms have highly revolutionized several areas including speech, image and natural language processing. The specific field of Machine Translation (MT) has not remained invariant. ...
    • Experimental research on encoder-decoder architectures with attention for chatbots 

      Ruiz Costa-Jussà, Marta; Nuez, Álvaro; Segura, Carlos (2018-03-18)
      Article
      Restricted access - publisher's policy
      Chatbots aim at automatically offering a conversation be- tween a human and a computer. While there is a long track of re- search in rule-based and retrieval-based approaches, the generation-based approaches are promisingly ...
    • A data-driven approach to construct survey-based indicators by means of evolutionary algorithms 

      Claveria, Oscar; Monte Moreno, Enrique; Torra Porras, Salvador (2018-01-09)
      Article
      Open Access
      In this paper we propose a data-driven approach for the construction of survey-based indicators using large data sets. We make use of agents’ expectations about a wide range of economic variables contained in the World ...
    • Multi-TID detection and characterization in a dense Global Navigation Satellite System receiver network 

      Yang, Heng; Monte Moreno, Enrique; Hernández Pajares, Manuel (2017-09-01)
      Article
      Open Access
      The medium-scale traveling ionospheric disturbances (MSTIDs) constitute the most frequent ionospheric wave signatures. We propose a method for detecting the number of simultaneous MSTIDs from a time series of high-pass-filtered ...
    • Empirical modelling of survey-based expectations for the design of economic indicators in five European regions 

      Claveria, Oscar; Monte Moreno, Enrique; Torra Porras, Salvador (2018-01-09)
      Article
      Open Access
      In this study we use agents’ expectations about the state of the economy to generate indicators of economic activity in twenty-six European countries grouped in five regions (Western, Eastern, and Southern Europe, and ...