Mostrando ítems 9-28 de 44
Benseny Ardiaca, Antoni (Fecha de defensa: 1984-09-03)
El problema de 3 cossos i, en particular, el problema restringit de 3 cossos, ha estat i és, com diu Wintner, la pedra de toc per als matemàtics de les successives generacions de Newton fins ara. Cada generació ha emprat ...
Mondelo González, José María (Fecha de defensa: 2001-07-13)
This works has been organized in three parts. The first (Chapter 1 to 5) is dedicated to the development and study of a procedure for the accurate computation of frequencies, as well ans the related Fourier coefficients, ...
Baldomá, Inmaculada (Fecha de defensa: 2001-01-01)
In general, when beginning to explore any scientific field, one focuses on the generic situations; that is, one centers on the behaviours that appear in “most” of the cases encountered in practice. This methodology ...
Perea Virgili, Laura (Fecha de defensa: 2010-05-21)
Formation flying offers space-dependent disciplines such as astrophysics, astrodynamics, and geodesy, to name a few, the possibility of creating large spaceborne sensors from an array of small spacecraft flying in formation. ...
Alberti, Marina (Fecha de defensa: 2013-02-21)
In this thesis, several methods for the automatic analysis of Intravascular Ultrasound (IVUS) sequences are presented, aimed at assisting physicians in the diagnosis, the assessment of the intervention and the monitoring ...
Pérez Palau, Daniel (Fecha de defensa: 2015-11-30)
L’objectiu d’aquesta tesi és afegir una petita fulla a l’arbre del coneixement. En particular a la branca del sistemes dinàmics. La teoria de sistemes dinàmics és la branca de les matemàtiques que estudia l’evolució del ...
Domingo Salazar, Carlos (Fecha de defensa: 2016-04-07)
In this thesis, we study different variants of Rubio de Francia’s extrapolation that allow us to obtain estimates near L1. This theory is subsequently applied to deduce enpoint boundedness for the Bochner-Riesz operator ...
Gutiérrez i Serrés, Pere (Fecha de defensa: 1995-06-02)
La memòria recull contribucions a diversos aspectes del problema de l'estabilitat en sistemes hamiltonians quasi-integrables. Aquests aspectes inclouen resultats d'estabilitat efectiva, que comporten el confinament de ...
Bosch Gual, Miquel (Fecha de defensa: 1992-09-30)
L'objectiu del treball és mostrar que alguns aspectes de certs sistemes dinàmics discrets bidimensionals poden ser estudiats mitjançant sistemes de dimensió 1 que corresponen a casos particulars o simplificacions. Els tres ...
Ripoll i Missé, Jordi (Fecha de defensa: 2005-10-05)
In this Thesis we address the study of some non-linear evolution equations (e.g. pde's) modelling the dynamics of sexually-reproducing structured populations, with special emphasis on biological evolution driven by natural ...
Hernández-Vela, Antonio (Fecha de defensa: 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, ...
Puertas i Prats, Eloi (Fecha de defensa: 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 ...
Reyes Estany, Miguel (Fecha de defensa: 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 ...
Carro Rossell, María Jesús (Fecha de defensa: 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 ...
Jorba Jorba, Lambert (Fecha de defensa: 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 ...
Tatjer i Montaña, Joan Carles (Fecha de defensa: 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 ...
Bautista Martín, Miguel Ángel (Fecha de defensa: 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 ...
Fontich Julià, Ernest (Fecha de defensa: 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 ...
Congost Iglesias, Maria Assumpta (Fecha de defensa: 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 ...
Ortega Aramburu, Joaquín Mª (Fecha de defensa: 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 ...