Now showing items 20-39 of 83

    CLUSDM: a multiple criteria decision making method for heterogeneous data sets 

    Valls, Aïda (Date of defense: 2002-12-13)

    Aquesta tesi presenta una nova metodologia per resoldre problemes de presa de decisions. Hem<br/>estudiat els casos en què cal considerar més d'un criteri. Aquests tipus de mètodes de decisió es<br/>coneixen com MCDM ...

    Complexity measures for resolution 

    Esteban Ángeles, Juan Luis (Date of defense: 2003-12-15)

    Esta obra es una contribución al campo de la Complejidad de la Demostración, que estudia la complejidad de los sistemas de demostración en términos de los recursos necesarios para demostrar o refutar fórmulas proposicionales. ...

    Contribution to structural parameters computation: volume models and methods 

    Cruz Matías, Irving Alberto (Date of defense: 2014-01-13)

    Bio-CAD and in-silico experimentation are getting a growing interest in biomedical applications where scientific data coming from real samples are used to compute structural parameters that allow to evaluate physical ...

    Contributions to the interactive visualization of medical volume models in mobile devices 

    Campoalegre Vera, Lázaro (Date of defense: 2014-07-11)

    With current medical imaging improvements, specialists are being able to obtain correct information of anatomical structures of the human organism. By using different image visualization techniques, experts can obtain ...

    Definition of external schemas and derived classes in object oriented databases 

    Samos Jiménez, José (Date of defense: 1997-05-14)

    El principal objetivo de esta tesis es ampliar el estudio de los esquemas externos en BDOO, en particular, su proceso de definición. Una nueva metodología de definición de esquemas externos que simplifica considerablemente ...

    Design and Analysis of Multidimensional Data Structures 

    Duch Brown, Amàlia (Date of defense: 2004-12-09)

    Aquesta tesi està dedicada al disseny i a l'anàlisi d'estructures de dades multidimensionals, és a dir, estructures de dades que serveixen per emmagatzemar registres $K$-dimensionals que solen representar-se com a punts ...

    Digui: a flexibe dialogue system for guiding the user interaction to guiding the user interaction to acces web services 

    González Bermúdez, Meritxell (Date of defense: 2010-10-22)

    Current dialogue systems can handle friendly and collaborative communication that supports diverse types of interactions, such as menus in which the user is asked to choose an option, form filling in which the user is ...

    Dissemination and visualisation of biological data 

    Gel Moreno, Bernat (Date of defense: 2014-07-29)

    With the recent advent of various waves of technological advances, the amount of biological data being generated has exploded. As a consequence of this data deluge, new challenges have emerged in the field of biological ...

    Domain ontology learning from the web 

    Sánchez Ruenes, David (Date of defense: 2007-12-14)

    El Aprendizaje de Ontologías se define como el conjunto de métodos utilizados para construir, enriquecer o adaptar una ontología existente de forma semiautomática, utilizando fuentes de información heterogéneas. En este ...

    Efficient algorithms for the realistic simulation of fluids 

    Ojeda Contreras, Jesús (Date of defense: 2013-05-28)

    Nowadays there is great demand for realistic simulations in the computer graphics field. Physically-based animations are commonly used, and one of the more complex problems in this field is fluid simulation, more so if ...

    El Mètode dels esdeveniments per a l'Actualització de vistes en bases de dades deductives 

    Teniente, Ernest (Date of defense: 1992-06-19)

    En esta tesis se presenta un nuevo método, llamado método de los eventos, para la actualización de vistas en bases de datos deductivas. Este método aumenta la base de datos con un conjunto de reglas, llamadas reglas de ...

    Empirical machine translation and its evaluation 

    Giménez Linares, Jesús Ángel (Date of defense: 2008-07-02)

    Aquesta tesi estudia l'aplicació de les tecnologies del Processament del Llenguatge Natural disponibles actualment al problema de la Traducció Automàtica basada en Mètodes Empírics i la seva Avaluació.<br/><br/>D'una banda, ...

    Enhanced perception in volume visualization 

    Díaz Iriberri, José (Date of defense: 2013-04-26)

    Due to the nature of scientic data sets, the generation of convenient visualizations may be a difficult task, but crucial to correctly convey the relevant information of the data. When working with complex volume models, ...

    Enriching unstructured media content about events to enable semi-automated summaries, compilations, and improved search by leveraging social networks 

    Steiner, Thomas (Date of defense: 2014-05-20)

    (i) Mobile devices and social networks are omnipresent Mobile devices such as smartphones, tablets, or digital cameras together with social networks enable people to create, share, and consume enormous amounts of media ...

    Estimació dels paràmetres de models ARMA (P,Q) mitjançant algorismes de filtratge òptim 

    Muñoz Gràcia, Maria Pilar (Date of defense: 1988-01-01)

    El objetivo del trabajo era sintetizar un filtro no lineal optimo para la estimación de parámetros de modelos arma. El interés de un filtro de este estilo reside en elhecho que permite evaluar exactamente el numero mínimo ...

    Exploiting distributional semantics for content-based and context-aware recommendation 

    Codina Busquet, Victor (Date of defense: 2014-06-13)

    During the last decade, the use of recommender systems has been increasingly growing to the point that, nowadays, the success of many well-known services depends on these technologies. Recommenders Systems help people to ...

    Exploration of customer churn routes using machine learning probabilistic models 

    Garcia Gomez, David (Date of defense: 2014-04-10)

    The ongoing processes of globalization and deregulation are changing the competitive framework in the majority of economic sectors. The appearance of new competitors and technologies entails a sharp increase in competition ...

    Factoid question answering for spoken documents 

    Comas Umbert, Pere R. (Date of defense: 2012-05-12)

    In this dissertation, we present a factoid question answering system, specifically tailored for Question Answering (QA) on spoken documents. This work explores, for the first time, which techniques can be robustly adapted ...

    Fast photorealistic techniques to simulate global illumination in videogames and virtual environments 

    Méndez Feliu, Àlex (Date of defense: 2007-06-15)

    Per al càlcul de la il·luminació global per a la síntesi d'imatges d'escenaris virtuals s'usen mètodes físicament acurats com a radiositat o el ray-tracing. Aquests mètodes són molt potents i capaços de generar imatges de ...