Ara es mostren els items 21-40 de 57

  • Generalització de mètodes de density-based clustering a dades mixtes 

    Mollá Santiago, Sheila (Universitat Politècnica de Catalunya, 2014-06-10)
    Projecte/Treball Final de Carrera
    Accés obert
    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
    Accés restringit per política de l'editorial
    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
    Accés restringit per política de l'editorial
    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
    Accés obert
    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 ...
  • 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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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)
    Projecte Final de Màster Oficial
    Accés obert
    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)
    Projecte Final de Màster Oficial
    Accés obert
    Realitzat a/amb:  Barcelona Supercomputing Centre
    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
    Accés obert
    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
    Accés obert
    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)
    Projecte Final de Màster Oficial
    Accés obert
    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)
    Projecte Final de Màster Oficial
    Accés restringit per acord de confidencialitat
  • Inyección integrada de conocimiento al proceso de clustering 

    Bermúdez Cobo, José Andrés (Universitat Politècnica de Catalunya, 2019-07-03)
    Projecte Final de Màster Oficial
    Accés restringit per acord de confidencialitat
    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)
    Projecte Final de Màster Oficial
    Accés obert
  • Medidas de diferencia y clasificación automática no paramétrica de datos composicionales 

    Martín Fernández, Josep Antoni (Universitat Politècnica de Catalunya, 2001-03-23)
    Tesi
    Accés obert
    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)
    Projecte Final de Màster Oficial
    Accés obert
    Realitzat a/amb:  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)
    Text en actes de congrés
    Accés obert
    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-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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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 ...
  • 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)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    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 ...
  • Performance evaluation of the boundary-layer height from lidar and the weather research and forecasting model at an urban coastal site in the North-East Iberian Peninsula 

    Banks, Robert Franklin; Tiana Alsina, Jordi; Rocadenbosch Burillo, Francisco; Baldasano Recio, José María (2015-11-01)
    Article
    Accés obert
    We evaluate planetary boundary-layer (PBL) parametrizations in the Weather Research and Forecasting (WRF) numerical model, with three connected objectives: first, for a 16-year period, we use a cluster analysis algorithm ...
  • Planar unclustered scale-free graphs as models for technological and biological networks 

    Miralles de la Asunción, Alicia; Comellas Padró, Francesc de Paula; Chen, Lichao; Zhang, Zhongzhi (2010-03-01)
    Article
    Accés restringit per política de l'editorial
    Many real life networks present an average path length logarithmic with the number of nodes and a degree distribution which follows a power law. Often these networks have also a modular and self-similar structure and, ...