Now showing items 1-11 of 11

    • Classifier selection with permutation tests 

      Arias Vicente, Marta; Arratia Quesada, Argimiro Alejandro; Duarte López, Ariel (IOS Press, 2017)
      Conference report
      Open Access
      This work presents a content-based recommender system for machine learning classifier algorithms. Given a new data set, a recommendation of what classifier is likely to perform best is made based on classifier performance ...
    • Marshall-Olkin extended Zipf distribution 

      Pérez Casany, Marta; Duarte López, Ariel; Prat Pérez, Arnau (Springer, 2015-12-18)
      Part of book or chapter of book
      Open Access
      Being able to generate large synthetic graphs resembling those found in the real world, is of high importance for the design of new graph algorithms and benchmarks. In this paper, we first compare several probability models ...
    • Multiple classifier performance 

      Duarte López, Ariel (Universitat Politècnica de Catalunya, 2015-10)
      Master thesis
      Open Access
    • Proceedings of the “Think Tank Hackathon’’, Big Data Training School for Life Sciences Follow-up, Ljubljana 6th – 7th February 2018 

      Schulze, Sabrina K.; Ramšak, Živa; Hoang, Yen; Zdravevski, Eftim; Pfeil, Juliane; Duarte López, Ariel; Baier, Uwe; Zagoršcak, Maja (2018-04-19)
      Article
      Open Access
      On 6th and 7th February 2018, a Think Tank took place in Ljubljana, Slovenia. It was a follow-up of the “Big Data Training School for Life Sciences” held in Uppsala, Sweden, in September 2017. The focus was on identifying ...
    • Randomly stopped extreme Zipf extensions 

      Duarte López, Ariel; Pérez Casany, Marta; Valero Baya, Jordi (2021-03-23)
      Article
      Open Access
      In this paper, we extend the Zipf distribution by means of the Randomly Stopped Extreme mechanism; we establish the conditions under which the maximum and minimum families of distributions intersect in the original family; ...
    • Sentiment analysis of financial news: mechanics and statistics 

      Arratia Quesada, Argimiro Alejandro; Ávalos Villaseñor, Gustavo Eduardo; Cabaña Nigro, Ana Alejandra; Duarte López, Ariel; Renedo Mirambell, Martí (Springer, 2021-06-11)
      Part of book or chapter of book
      Open Access
      This chapter describes the basic mechanics for building a forecasting model that uses as input sentiment indicators derived from textual data. In addition, as we focus our target of predictions on financial time series, ...
    • The CHARME "Advanced Big Data Training School for Life Sciences": an example of good practices for training on current bioinformatics challenges 

      Hoang, Yen; Pfeil, Juliane; Zagoršcak, Maja; Zdravevski, Eftim; Ramšak, Živa; Schulze, Sabrina K.; Papageorgiou, K.; Duarte López, Ariel; Pérez Casany, Marta (2019-02-05)
      Article
      Open Access
      The CHARME “Advanced Big Data Training School for Life Sciences” took place during 3-7 September 2018, at the Campus Nord of the Technical University of Catalonia (UPC) in Barcelona (ES). The school was organised by the ...
    • The Zipf-Polylog distribution: Modeling human interactions through social networks 

      Valero Baya, Jordi; Pérez Casany, Marta; Duarte López, Ariel (2022-10)
      Article
      Open Access
      The Zipf distribution attracts considerable attention because it helps describe data from natural as well as man-made systems. Nevertheless, in most of the cases the Zipf is only appropriate to fit data in the upper tail. ...
    • The Zipf–Poisson-stopped-sum distribution with an application for modeling the degree sequence of social networks 

      Duarte López, Ariel; Pérez Casany, Marta; Valero Baya, Jordi (2020-03-01)
      Article
      Open Access
      Under the Zipf Distribution, the frequency of a value is a power function of its size. Thus, when plotting frequencies versus size in log–log scale of data following that distribution, one obtains a straight line. The Zipf ...
    • Using the Marshall-Olkin extended Zipf distribution in graph generation 

      Duarte López, Ariel; Prat Pérez, Arnau; Pérez Casany, Marta (Springer, 2015-12-18)
      Part of book or chapter of book
      Restricted access - publisher's policy
      Being able to generate large synthetic graphs resembling those found in the real world, is of high importance for the design of new graph algorithms and benchmarks. In this paper, we first compare several probability models ...
    • Zipf extensions and their applications for modeling the degree sequences of real networks 

      Duarte López, Ariel (Universitat Politècnica de Catalunya, 2021-02-05)
      Doctoral thesis
      Open Access
      The Zipf distribution, also known as discrete Pareto distribution, attracts considerable attention because it helps describe skewed data from many natural as well as man-made systems. Under the Zipf distribution, the ...