Now showing items 19-38 of 44

    From pixels to gestures: learning visual representations for human analysis in color and depth data sequences 

    Hernández-Vela, Antonio (Date of defense: 2015-03-09)

    The visual analysis of humans from images is an important topic of interest due to its relevance to many computer vision applications like pedestrian detection, monitoring and surveillance, human-computer interaction, ...

    Generalized Stacked Sequential Learning 

    Puertas i Prats, Eloi (Date of defense: 2014-11-04)

    Over the past few decades, machine learning (ML) algorithms have become a very useful tool in tasks where designing and programming explicit, rule-based algorithms are infeasible. Some examples of applications ...

    Human Pose Analysis and Gesture Recognition from Depth Maps: Methods and Applications 

    Reyes Estany, Miguel (Date of defense: 2017-02-27)

    The visual analysis of humans is one of the most active research topics in Computer Vision. Several approaches for body pose recovery have been recently presented, allowing for better generalization of gesture recognition ...

    Interpolación compleja de operadores lineales 

    Carro Rossell, María Jesús (Date of defense: 1988-01-30)

    El primer resultado de interpolación de operadores data del año 1911 y es debido a I. Schur. Dos años más tarde, Young prueba un resultado del mismo tipo referente a espacios Lp y a un operador L La extensión de estos ...

    Intervals de marques 

    Jorba Jorba, Lambert (Date of defense: 2003-05-26)

    El sistema de les marques s'enquadra dins del camp de l'anàlisi intervalar modal. <br/>En aquest context la tesi aporta un estudi de les operacions lineals, de la seva semàntica i sobretot de la seva operativitat quan les ...

    Invariant manifolds and bifurcations for one-dimensional and two-dimensional dissipative maps 

    Tatjer i Montaña, Joan Carles (Date of defense: 1990-03-01)

    It is known that for the study of continuous dynamical systems the discret case plays an important role because, with it we can study the continuous one by using the Poincaré return map. In the discret case we can distinguish ...

    Learning error-correcting representations for multi-class problems 

    Bautista Martín, Miguel Ángel (Date of defense: 2016-02-11)

    Real life is full of multi-class decision tasks. In the Pattern Recognition field, several method- ologies have been proposed to deal with binary problems obtaining satisfying results in terms of performance. However, the ...

    Mesura del trencament de separatrius en famílies de difeomorfismes amb punts hiperbòlics 

    Fontich Julià, Ernest (Date of defense: 1985-12-05)

    Se consideran familias de difeomorfismos con un punto fijo parabólico para el valor cero del parámetro y un punto fijo hiperbólico para valores mayores que cero que tengan en este caso puntos homoclínicos asociados a ...

    Mesures i probabilitats en estructures ordenades 

    Congost Iglesias, Maria Assumpta (Date of defense: 1981-01-01)

    En una primera part s'estudien els conjunts de mesures que prenen valors en un grup reticualt, per a les quals la T-aditivitat es defineix a partir de l'estructura ordenada. L'estudi realitzat a partir de les propietats ...

    Morfismos diferenciables topológicamente lisos. Caracterizaciones y aplicaciones 

    Ortega Aramburu, Joaquín Mª (Date of defense: 1972-01-01)

    Esta memoria recoge algunos de los puntos fundamentales e inéditos que han aparecido al iniciar un estudio sobre los métodos espectrales en Análisis y, en particular, sobre los anillos y estructuras diferenciables. Dicho ...

    On a Family of Degree 4 Blaschke Products 

    Canela Sánchez, Jordi (Date of defense: 2015-03-18)

    This PhD thesis belongs to the area of discrete dynamical systems in the complex plane, i.e. the iteration of analytic functions in one complex variable. Given a rational map f from the Riemann sphere onto itself, we ...

    On Quasiperiodic Perturbations of Ordinary Differential Equations 

    Jorba i Monte, Àngel (Date of defense: 1991-10-11)

    In this work we study several topics concerning quasi-periodic time-dependent perturbations of ordinary differential equations. This kind of equations appear as models in many applied problems of Celestial Mechanics, and ...

    On the Meromorphic Non-Integrability of Some Problems in Celestial Mechanics 

    Simon i Estrada, Sergi (Date of defense: 2007-07-09)

    In this thesis, we present a proof of the meromorphic non-integrability for some problems arising from Celestial Mechanics, as well as a new necessary condition for partial integrability in a wider Hamiltonian setting. ...

    On-line norm synthesis for open Multi-Agent systems 

    Morales Matamoros, Javier (Date of defense: 2016-02-02)

    Multi Agent Systems (MAS) are computerised systems composed of autonomous software agents that interact to solve complex problems. Within a MAS, agents require some mechanism to coordinate their activities. In the MAS ...

    Optimal Sobolev Embeddings in Spaces with Mixed Norm 

    Clavero, Nadia F. (Date of defense: 2015-03-20)

    Este proyecto hace referencia a estimaciones, en espacios funcionales, que relacionan la norma de una función y la de sus derivadas. Concretamente, nuestro principal objetivo es estudiar las estimaciones clásicas de las ...

    Por qué la difusión de Arnold aparece genéricamente en los sistemas hamiltonianos con más de dos grados de libertad. 

    Delshams, Amadeu (Date of defense: 1984-01-01)

    El teorema de Kolmogorov-Arnold-Moser no asegura la estabilidad cerca de los toros m-dimensionales que se conservan para hamiltonianos casi integrables con "m" grados de libertad. Puede aparecer una difusión de trayectorias ...

    Qualitative analysis of the anisotropic Kepler problem 

    Casasayas i Mas, Josefa (Date of defense: 1984-01-01)

    The anisotropic Kepler problem was introduced by Gutzwiller as a classical mechanical system which approximates the following quantum mechanical system: the study of bound states of an electron near a donor impurity of a ...

    Random zero sets of analytic functions and traces of functions in Fock spaces 

    Buckley, Jeremiah (Date of defense: 2013-06-06)

    Interpolating and sampling sequences in spaces of functions are classical subjects in complex and harmonic analysis. A sequence of points is said to be interpolating if, given any collection of values, we can find a function ...

    Real analysis in non-euclidean spaces: trees and spaces of homogeneous type 

    Garcia Domingo, Josep Lluís (Date of defense: 2003-01-01)

    DE LA TESIS:<br/><br/>El contenido de esta tesis se enmarca dentro del Análisis Real. En particular, trata del estudio de ciertos problemas de la teoría de pesos, (una referencia clásica sobre esta teoría es el libro de ...

    Sequential image analysis for computer-aided wireless endoscopy 

    Drozdzal, Michal (Date of defense: 2014-05-16)

    Wireless Capsule Endoscopy (WCE) is a technique for inner-visualization of the entire small intestine and, thus, offers an interesting perspective on intestinal motility. The two major drawbacks of this technique are: 1) ...