Universitat de Barcelona
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Cuando, realizado un análisis de la varianza, el efecto de un factor resulta significativo, para poder tener información sobre las causas de esta significación, se hace necesario conocer la forma en que se diferencian los ...
Razones de coherencia lógica, en el contexto de modelos estadísticos paramétricos, llevan a considerar como estimadores únicamente aquellos que poseen la propiedad de invarianza funcional. Los estimadores resultan así ...
This thesis deals with three possible applications of stochastic calculus: modelling prices by supply and demand in a financial market where there is an informed trader, turbulence and financial models using ambit processes ...
Supply chain formation involves determining the participants and the exchange of goods within a production network. Today’s companies operate autonomously, making local decisions, and coordinating ...
L'estudi dels grups fuchsians i les funcions automorfes associades s'inicià en el segle XIX en els treballs de H. Poincaré, R. Fricke i F. Klein, principalment. A partir dels anys seixanta, al llarg de nombrosos treballs, ...
The blending of digital technologies, such as artificial intelligence, interactive systems, 3D interfaces and the Internet is enabling new services for users. In particular, Hybrid Structured 3D Virtual Environments (VE) ...
Deep learning has recently been enjoying an increasing popularity due to its success in solving challenging tasks. In particular, deep learning has proven to be effective in a large variety of computer vision tasks, such ...
The main goal of this thesis is to characterize the weak-type (resp. strong-type) boundedness of the Hilbert transform H on weighted Lorentz spaces Λpu(w). The characterization is given in terms of some geometric ...
The first part of the thesis is devoted to the analysis on a capacity space, with capacities as substitutes of measures in the study of function spaces. The goal is to extend to the associated function lattices some aspects ...
[eng] The notion of cause and effect is fundamental to our understanding of the real world; ice cream sales correlate with jellyfish stings (both increase during summer), but a ban on ice cream could hardly stop jellyfishes. ...
El treball de recerca que recull aquesta memòria s'emmarca dins del càlcul estocàstic de variacions i el càlcul estocàstic anticipatiu. La memòria es divideix en quatre capítols. Al primer (de preliminars) s'introdueixen ...
The subject of the theory of Dynamical Systems is the evolution of systems with respect to time. Hence, it has many applications to other areas of science, such as Physics, Biology, Economics, etc. and it also has interactions ...
Newton's method associated to a complex holomorphic function f is defined by the dynamical system Nf(z) = z – f(z) / f'(z). As a root-finding algorithm, a natural question is to understand the dynamics of Nf about its fixed ...
Our healthcare systems are facing sustainability challenges caused by a demographic shift with ageing, chronicity and disability growing in our society. A novel healthcare paradigm should be founded on 4P medicine: Preventive, ...
Se estudian ciertas versiones del teorema de compacidad y del teorema de completud en su aplicación a extensiones de la lógica de primer orden. Concretamente, se consideran M-lógicas y K-lógicas, donde M es un modelo y K ...
Aquesta memòria és un recull de diverses desigualtats d'interès principalment en regressió i anàlisi multivariant, les quals en alguns casos s'il·lustren i interpreten gràfícament.<br/><br/>En els primers capítols es ...
En aquesta tesi es realitza l'estudi de les propietats de dues equacions diferencials estocàstiques: una en derivades parcials per processos hiparamètrics que convertim en una equació integral estocàstica en el pla, i una ...
DE LA TESI DOCTORAL:<br/><br/>Aquesta memòria estudia bàsicament el comportament asimptòtic de la densitat de diferents famílies de vectors aleatoris. Al començament es dóna una introducció on es comenten diversos treballs ...
Aquesta tesi presenta una contribució a l'estudi de les estructures algebraïques dels sistemes lògics deductius
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 ...
