DAMA-UPC - Data Management Group de la Universitat Politècnica de Catalunya : Enviaments recents

Ara es mostren els items 13-24 de 41

    • Put three and three together: Triangle-driven community detection 

      Prat Pérez, Arnau; Domínguez Sal, David; Brunat Blay, Josep Maria; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2016-02-01)
      Article
      Accés obert
      Community detection has arisen as one of the most relevant topics in the field of graph data mining due to its applications in many fields such as biology, social networks, or network traffic analysis. Although the existing ...

    • Tècniques de feature weighting per casos no supervisats: Implementació a GESCONDA 

      Sànchez-Marrè, Miquel; Gómez Villamor, Sergio; Teixidò, F; Gibert, Karina (2006-07)
      Report de recerca
      Accés obert
      Feature selection and feature weighting methods in supervised domains have been thoroughly discussed in the literature. On the other hand, very little work has been done for unsupervised domains, probably due to the assumed ...

    • Introduction to graph databases 

      Larriba Pey, Josep; Martínez Bazán, Norbert; Domínguez Sal, David (2014-09-08)
      Capítol de llibre
      Accés restringit per política de l'editorial
      The use of graphs in analytic environments is getting more and more widespread, with applications in many different environments like social network analysis, fraud detection, industrial management, knowledge analysis, ...

    • High quality, scalable and parallel community detection for large real graphs 

      Prat Pérez, Arnau; Domínguez Sal, David; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Community detection has arisen as one of the most relevant topics in the field of graph mining, principally for its applications in domains such as social or biological networks analysis. Different community detection ...

    • Automatic multi-partite graph generation from arbitrary data 

      Álvarez García, Sandra; Baeza Yates, Ricardo; Brisaboa, Nieves R.; Larriba Pey, Josep; Pedreira, Oscar (2014-08-22)
      Article
      Accés restringit per política de l'editorial
      In this paper we present a generic model for automatic generation of basic multi-partite graphs obtained from collections of arbitrary input data following user indications. The paper also presents GraphGen, a tool that ...

    • Two-way replacement selection 

      Martínez Palau, Xavier; Domínguez Sal, David; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2010-09-01)
      Article
      Accés restringit per política de l'editorial
      The performance of external sorting using merge sort is highly dependent on the length of the runs generated. One of the most commonly used run generation strategies is Replacement Selection (RS) because, on average, it ...

    • Using genetic algorithms for attribute grouping in multivariate microaggregation 

      Balasch Masoliver, Jordi; Muntés Mulero, Víctor; Nin Guerrero, Jordi (2014-01-01)
      Article
      Accés obert
      Anonymization techniques that provide k-anonymity suffer from loss of quality when data dimensionality is high. Microaggregation techniques are not an exception. Given a set of records, attributes are grouped into ...

    • A discussion on the design of graph database benchmarks 

      Domínguez Sal, David; Martínez Bazán, Norbert; Muntés Mulero, Víctor; Baleta Ferrer, Pedro; Larriba Pey, Josep (2011)
      Article
      Accés obert
      Graph Database Management systems (GDBs) are gaining popularity. They are used to analyze huge graph datasets that are naturally appearing in many application areas to model interrelated data. The objective of this paper ...

    • Massive query expansion by exploiting graph knowledge bases for image retrieval 

      Guisado Gámez, Joan; Domínguez Sal, David; Larriba Pey, Josep (Association for Computing Machinery (ACM), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Annotation-based techniques for image retrieval suffer from sparse and short image textual descriptions. Moreover, users are often not able to describe their needs with the most appropriate keywords. This situation is a ...

    • Producer-consumer: the programming model for future many-core processors 

      Prat Pérez, Arnau; Domínguez Sal, David; Larriba Pey, Josep; Troncoso, Pedro (Springer, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The massive addition of cores on a chip is adding more pressure to the accesses to main memory. In order to avoid this bottleneck, we propose the use of a simple producer-consumer model, which allows for the temporary ...

    • Hybrid tables for speeding-up data accesses in hybrid database management systems 

      Guisado Gámez, Joan; Wolski, Antoni; Zuzarte, Calisto; Larriba Pey, Josep; Muntés Mulero, Víctor (2011)
      Comunicació de congrés
      Accés obert

    • Generalized median string computation by means of string embedding in vector spaces 

      Jiang, Xiaoyi; Wentker, Jöran; Ferrer Sumsi, Miquel (2012-11-01)
      Article
      Accés restringit per política de l'editorial
      In structural pattern recognition the median string has been established as a useful tool to represent a set of strings. However, its exact computation is complex and of high computational burden. In this paper we propose ...