Now showing items 25-44 of 83
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 ...
Quer Bosor, Carme (Date of defense: 1998-10-14)
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 ...
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 ...
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 ...
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 ...
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 ...
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, ...
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, ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
Cares Gallardo, Carlos (Date of defense: 2012-09-20)
Since the i* framework emerged in the requirements engineering community in the mid-90s, different research groups have proposed variations to the modelling language proposed in the i* framework (¿the i* language¿). There ...
Cruz Barbosa, Raúl (Date of defense: 2009-10-01)
In many real-world application problems, the availability of data labels for supervised learning is rather limited. Incompletely labeled datasets are common in many of the databases generated in some of the currently most ...
Hidalgo García, Marta R. (Date of defense: 2013-12-02)
Geometric constraint solving is a central topic in many fields such as parametric solid modeling, computer-aided design or chemical molecular docking. A geometric constraint problem consists of a set geometric objects on ...
Pérez Cazorla, Frederic (Date of defense: 2003-05-26)
The objective of this thesis is the development of algorithms for the simulation of the light transport in general environments to render high quality still images. To this end, first we have analyzed the existing methods ...
Belanche Muñoz, Lluís A. (Lluís Antoni) (Date of defense: 2000-07-18)
Aquest treball presenta una classe de funcions que serveixen de models neuronals generalitzats per ser usats en xarxes neuronals artificials. Es defineixen com una mesura de similitud que actúa com una definició flexible ...