Now showing items 21-40 of 59

    • Fog - Applying blockchain to secure a distributed set of clusters 

      Marcer Albareda, Pau (Universitat Politècnica de Catalunya, 2019-07-02)
      Master thesis
      Open Access
      5G has already been presented and shown in major congresses, thus it’s just a matter of time that this technology comes to the enterprise and public usages. Therefore, we can affirm that we are moving towards a world where ...
    • Generalització de mètodes de density-based clustering a dades mixtes 

      Mollá Santiago, Sheila (Universitat Politècnica de Catalunya, 2014-06-10)
      Master thesis (pre-Bologna period)
      Open Access
      El objetivo del proyecto es diseñar, implementar, integrar a KLASS y aplicar métodos de clustering basado en densidades y utilizar datos reales para su estudio. La particularidad que se propone es que se puedan utilizar ...
    • GEVA: geometric variability-based approaches for identifying patterns in data 

      Irigoien, I.; Arenas, Concepción; Fernández Aréizaga, Elena; Mestres, Francisco (2009-10-15)
      Article
      Restricted access - publisher's policy
      This paper, arising from population studies, develops clustering algorithms for identifying patterns in data. Based on the concept of geometric variability, we have developed one polythetic-divisive and three agglomerative ...
    • Global optimality in k-means clustering 

      Tîrnauca, Cristina; Gómez Pérez, Domingo; Balcázar Navarro, José Luis; Montaña Arnaiz, José Luis (2018-05-01)
      Article
      Open Access
      We study the problem of finding an optimum clustering, a problem known to be NP-hard. Existing literature contains algorithms running in time proportional to the number of points raised to a power that depends on the ...
    • Identification of phytoplankton pigment assemblages using derivative spectroscopy of hyperspectral remote-sensing reflectances 

      Torrecilla Ribalta, Elena; Piera Fernández, Jaume; Stramski, D.; Reynolds, R.; Millán-Nuñez, E. (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2010-04-26)
      Article
      Open Access
      One of the major challenges of ocean color research is distinguishing phytoplankton groups from in situ, airborne and satellite measurements to better understand diversity of phytoplankton and some involved biochemical ...
    • Implementación del análisis de trayectorias en datos de procesos discretos en KLASS 

      Calderón Valdiviezo, Ricardo Gregorio (Universitat Politècnica de Catalunya, 2019-10)
      Master thesis
      Open Access
      Ésta tésis de máster está enfocada en el análisis de trayectorias de procesos discretos , implementando un diagrama que permita representar de forma visual el comportamiento de un trayecto generado por la clasificación ...
    • Improving i-Vector and PLDA based speaker clustering with long-term features 

      Woubie, Abraham; Luque, Jordi; Hernando Pericás, Francisco Javier (International Speech Communication Association (ISCA), 2016)
      Conference report
      Restricted access - publisher's policy
      i-vector modeling techniques have been successfully used for speaker clustering task recently. In this work, we propose the extraction of i-vectors from short-and long-term speech features, and the fusion of their PLDA ...
    • Inducted Concepts From Embbeded Classes For Automatic Interpretation In Hierarchical Clustering 

      Lozano Hontecillas, Esther (Universitat Politècnica de Catalunya, 2009-06-22)
      Master thesis
      Open Access
      In very complex and unstructured domains, the Intelligent Decision Support Systems become very important tools for the expert, since allow to manage a quantity of information in a way that would be impossible to do manually. ...
    • Inferring program structure from execution traces 

      Martínez Vera, Juan Francisco (Universitat Politècnica de Catalunya, 2018-04-16)
      Master thesis
      Open Access
      Covenantee:   Barcelona Supercomputing Center
      Application structure detection problem have been typical solved by means of sequential pattern mining techniques but they present to be difficultly scalable. In this thesis we propose a new approach for HPC apps facing ...
    • Influencing factors in energy use of housing blocks: a new methodology, based on clustering and energy simulations, for decision making in energy refurbishment projects 

      Cipriano Lindez, Xavier; Vellido Alcacena, Alfredo; Cipriano Lindez, Jordi; Martí Herrero, Jaime; Danov, Stoyan (2017-04-01)
      Article
      Open Access
      In recent years, big efforts have been dedicated to identify which are the factors with highest influence in the energy consumption of residential buildings. These factors include aspects such as weather dependence, user ...
    • Integrating clinicians, knowledge and data: expert-based cooperative analysis in healthcare decision support 

      Gibert, Karina; García Alonso, Carlos; Salvador Carulla, Luis (2010-10-16)
      Article
      Open Access
      Background: Decision support in health systems is a highly difficult task, due to the inherent complexity of the process and structures involved. Method: This paper introduces a new hybrid methodology Expert-based Cooperative ...
    • Interpretación automática de clases a partir de la extensión del cuadro termómetro a variables cualitativas a través de KLASS 

      Ávila Montalvo, Johnny Javier (Universitat Politècnica de Catalunya, 2018-06-25)
      Master thesis
      Open Access
      Este proyecto propone una exención para el software de minería de datos Java-KLASS con el fin de generalizar la herramienta de termómetros a variables cualitativas. De igual forma se describe el procedimiento para la ...
    • Interpretación automática de clases y resolución de conflictos en bases de conocimiento para KLASS 

      Jordán Murillo, Carlos Luis (Universitat Politècnica de Catalunya, 2018-06-19)
      Master thesis
      Restricted access - confidentiality agreement
    • Inyección integrada de conocimiento al proceso de clustering 

      Bermúdez Cobo, José Andrés (Universitat Politècnica de Catalunya, 2019-07-03)
      Master thesis
      Restricted access - confidentiality agreement
      Implementar una nueva funcionalidad de KLASS, que se pueda realizar clasificación donde simultáneamente exista ontología de referencia para interpretaciones semánticas de los vocabularios de las variables cualitativas y ...
    • Logic synthesis of handshake components using clustering techniques 

      Cruz Fernández, Francisco de la (Universitat Politècnica de Catalunya, 2007-06-25)
      Master thesis
      Open Access
    • Medidas de diferencia y clasificación automática no paramétrica de datos composicionales 

      Martín Fernández, Josep Antoni (Universitat Politècnica de Catalunya, 2001-03-23)
      Doctoral thesis
      Open Access
      Es muy frecuente encontrar datos de tipo composicional en disciplinas tan dispares como son, entre otras, las ciencias de la tierra, la medicina, y la economía. También es frecuente en estos ámbitos el uso de técnicas de ...
    • Multi-criteria layout pattern optimization for a luxury fashion retailer 

      Fetisova, Olga (Universitat Politècnica de Catalunya, 2018-06-18)
      Master thesis
      Open Access
      Covenantee:   Clariba
      The thesis examines how customers behavior helps to adjust a layout that optimizes sales. We designed ETL process that includes image processing, web scraping, followed by pattern mining, clustering, and NLP. Then, we ...
    • On deletions in open addressing hashing 

      Jiménez Gómez, Rosa María; Martínez Parra, Conrado (Society for Industrial and Applied Mathematics (SIAM), 2018)
      Conference report
      Open Access
      Deletions in open addressing tables have often been seen as problematic. The usual solution is to use a special mark’deleted’ so that probe sequences continue past deleted slots, as if there was an element still sitting ...
    • On the usefulness of object tracking techniques in performance analysis 

      Llort Sánchez, Germán; Servat, Harald; González García, Juan; Giménez Lucas, Judit; Labarta Mancho, Jesús José (Association for Computing Machinery (ACM), 2013)
      Conference report
      Restricted access - publisher's policy
      Understanding the behavior of a parallel application is crucial if we are to tune it to achieve its maximum performance. Yet the behavior the application exhibits may change over time and depend on the actual execution ...
    • On-line detection of large-scale parallel application's structure 

      Llort Sánchez, Germán; González García, Juan; Servat, Harald; Giménez Lucas, Judit; Labarta Mancho, Jesús José (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Conference report
      Restricted access - publisher's policy
      With larger and larger systems being constantly deployed, trace-based performance analysis of parallel applications has become a daunting task. Even if the amount of performance data gathered per single process is ...