Browsing by Author "Duarte López, Ariel"
Now showing items 1-11 of 11
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Classifier selection with permutation tests
Arias Vicente, Marta; Arratia Quesada, Argimiro Alejandro; Duarte López, Ariel (IOS Press, 2017)
Conference report
Open AccessThis 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 AccessBeing 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 AccessOn 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 AccessIn 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 AccessThis 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 AccessThe 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 AccessThe 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 AccessUnder 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 policyBeing 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 AccessThe 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 ...