Now showing items 30-49 of 116

    Contribución al coloreado de grafos y las redes pequeño-mundo. 

    Ozón Górriz, Javier (Date of defense: 2001-07-23)

    En la presente tesis se analiza el problema del coloreado de grafos tanto desde el punto de vista teórico como en relación a la resolución del problema mediante técnicas algorítmicas, algunas de las cuales se describen por ...

    A contribution to consensus modeling in decision-making by means of linguistic assessments 

    Montserrat Adell, Jordi (Date of defense: 2018-07-20)

    Decision-making is an active field of research. Specifically, in recent times, a lot of contributions have been presented on decision-making under linguistic assessments. To tackle this kind of processes, hesitant fuzzy ...

    Desarrollo de un sistema de monitorización de la integridad estructural para aplicaciones en ingeniería mediante técnicas de reducción de la dimensionalidad 

    Agis Cherta, David (Date of defense: 2020-12-21)

    This thesis describes a structural health monitoring (SHM) strategy to detect and classify changes in structures that can be equipped with sensors. SHM is an area of great interest, because its main objective is to verify ...

    Design of a hysteresis predictive control strategy with engineering application cases 

    Ponce de León Puig, Nubia Ilia (Date of defense: 2021-12-10)

    This doctoral thesis exposes the development of a redesigned Predictive Control strategy that uses hysteresis to improve the performance of the controlled systems in different fields of application. The approach may use ...

    Development of a Large-Eddy simulation framework for engineering applications using the finite element method 

    Chrysokentis, Georgios (Date of defense: 2019-04-03)

    This thesis develops a large eddy simulation framework for engineering applications using the finite element method. It focuses on the numerical formulation, the wall modelling approach as well as the generation of turbulent ...

    Diffusion processes and nanoparticle growth 

    Fanelli, Claudia (Date of defense: 2020-09-15)

    Es conocido que muchas propiedades de las nanopartículas, como la luminiscencia, la fotoestabilidad, la eficiencia de la radiación óptica y las propiedades eléctricas, dependen del tamaño. Por lo tanto, la capacidad de ...

    Discrete operators and distances on subdivision networks 

    Monsó Burgués, Enrique P.J. (Date of defense: 2022-10-20)

    (English) The research we have carried out lies within the domain of diffusion problems for elliptic operators that are defined on discrete structures called networks, that are graphs that are capable of discriminating ...

    Disentangling ecological networks in marine microbes 

    Deutschmann, Ina Maria (Date of defense: 2021-11-29)

    There is a myriad of microorganisms on Earth contributing to global biogeochemical cycles, and their interactions are considered pivotal for ecosystem function. Previous studies have already determined relationships between ...

    Efficient solvers for power flow equations : parametric solutions with accuracy control assessment 

    García-Blanco, Raquel (Date of defense: 2017-02-09)

    The Power Flow model is extensively used to predict the behavior of electric grids and results in solving a nonlinear algebraic system of equations. Modeling the grid is essential for design optimization and control. Both ...

    Ejection-collision orbits in the restricted three-body problem 

    Rodríguez del Río, Óscar (Date of defense: 2021-07-06)

    The main objective of this dissertation is the study of the ejection-collision (EC) orbits in the circular and planar Restricted Three Body Problem (RTBP from now on). In particular, we will focus on the analytical and ...

    Elliptic problems: regularity of stable solutions and a nonlocal Weierstrass extremal field theory 

    Urtiaga Erneta, Iñigo (Date of defense: 2023-07-04)

    (English) This PhD dissertation deals with qualitative questions from the theory of elliptic Partial Differential Equations (PDE) and integro-differential equations. We are primarily interested in a distinguished class of ...

    Els inicis de l'enginyeria nuclear a Barcelona : la Càtedra Ferran Tallada (1955-1962) 

    Barca i Salom, Francesc Xavier (Date of defense: 2002-07-02)

    Fa 150 anys que es van crear els estudis d'enginyeria industrial a Espanya amb l'objectiu de donar resposta a la creixent industrialització. Tanmateix, de totes les escoles inicialment creades sols l'Escola d'Enginyeria ...

    Equacions de difusió amb condicions de contorn no lineals 

    Consul, Neus (Date of defense: 1997-05-09)

    Els resums d'aquesta tesi s'han introduït en format "PDF"

    Errores en la búsqueda de condiciones robustas. Metodologías para evitarlos. 

    Pozueta Fernández, Maria Lourdes (Date of defense: 2001-12-10)

    El problema de encontrar condiciones robustas al efecto de factores no controlados es un tema que interesa enormemente a las empresas ya que es una característica que demanda el mercado. Existen básicamente dos métodos ...

    Esquemes per a compartir secrets 

    Sáez, Germán (Date of defense: 1998-07-30)

    Aquesta tesi ha estat destacada amb la menció de <br/>PREMI EXTRAORDINARI DE DOCTORAT en l'àmbit de MATEMÀTIQUES<br/>Curs 1997 - 98

    Estimates and rigidity for stable solutions to some nonlinear elliptic problems 

    Miraglio, Pietro (Date of defense: 2020-01-28)

    My thesis deals with the study of elliptic PDE. It is divided into two parts, the first one concerning a nonlinear equation involving the p-Laplacian, and the second one focused on a nonlocal problem. In the first part, ...

    Estudi i disseny de grans xarxes d'interconnexió: modularitat i comunicació 

    Dalfó Simó, Cristina (Date of defense: 2007-12-19)

    Normalment les grans xarxes d'interconnexió o de comunicacions estan dissenyades utilitzant tècniques de la teoria de grafs. Aquest treball presenta algunes contribucions a aquest tema. Concretament, presentem dues noves ...

    Estudio y caracterización de soluciones para juegos cooperativos y bicooperativos 

    Domènech i Blàzquez, Margarita (Date of defense: 2020-11-24)

    The first part of this thesis focuses on cooperative games and specifically on the study of semivalues and probabilistic values. Each semivalue, as a solution concept defined on cooperative games with a finite set of ...

    First order logic of random sparse structures 

    Larrauri Borroto, Lázaro Alberto (Date of defense: 2023-03-03)

    (English) This work is dedicated to the study several models of random structures from the perspective of first-order logic. We prove that the asymptotic probabilities of first-order statements converge in a general model ...

    Flexoelectricity at surface instabilities and stress singularities 

    Mohammadi, Hossein (Date of defense: 2023-06-16)

    (English) The flexoelectric effect, the two-way linear coupling between strain gradient and electric polarization (direct flexoelectricity) or electric field gradient and strain (converse flexoelectricity) universally ...