Now showing items 21-40 of 5424

    A constraint-based hypergraph partitioning approach to coreference resolution 

    Sapena Masip, Emili (Date of defense: 2012-05-16)

    The objectives of this thesis are focused on research in machine learning for coreference resolution. Coreference resolution is a natural language processing task that consists of determining the expressions in a discourse ...

    A contribution to chemical process operation support: new machine learning and surrogate models based approaches for process optimization, supervision and control 

    Shokry Abdelaleem Taha Zied, Ahmed (Date of defense: 2021-05-05)

    In the chemical process industry, the decision-making hierarchy is inherently model-based. The scale and complexity of the considered models (e.g., enterprise, plant or unit model) depend on the decision-making level (e.g., ...

    A contribution to multi-criteria decision making in sustainable energy management based on fuzzy and qualitative reasoning 

    Afsordegan, Arayeh (Date of defense: 2015-12-21)

    Energy problems are serious problems caused by limited resources and by human activity such as deforestation, water pollution and various other long-term practices that have environmental impact which produces global warming ...

    A contribution to sustainable management of integrated material/energy networks in process industries 

    Morakabatchiankar, Shabnam (Date of defense: 2021-07-22)

    Towards sustainability forces process industries to change their traditional patterns. Therefore, efficient retrofitting has been a significant challenge and raised several issues, motivating the process system engineering ...

    A contribution to the finite element analysis of high-speed compressible flows and aerodynamics shape optimization 

    Kouhi Esfahani, Mohammad (Date of defense: 2013-09-30)

    This work covers a contribution to two most interesting research elds in aerodynamics, the fi nite element analysis of high-speed compressible flows (Part I) and aerodynamic shape optimization (Part II). The fi rst part ...

    A contribution to the ranking and description of classifications 

    Sánchez Hernández, Germán (Date of defense: 2013-09-13)

    This thesis presents a novel and complete fuzzy multi-criteria decision making (MCDM) methodology. This methodology is specifically designed for selecting classifications in the framework of unsupervised learning systems. ...

    A contribution to the theory of convolutional codes from systems theory piont of view 

    Um, Laurence Emilie (Date of defense: 2015-05-25)

    Information is such a valuable good of our time. Given that the transmission of information has always been subject to precision problems, knowing the obstacles existing between the transmitter and the receiver, eventual ...

    A Convex Decomposition Perspective on Dynamic Bandwidth Allocation and Applications 

    Morell Pérez, Antoni (Date of defense: 2008-09-23)

    Tradicionalment, les tècniques d'accés múltiple en sistemes de comunicacions multi-usuari han estat desenvolupades o bé orientades a la connexió o bé orientades al tràfic. En el primer cas, l'objectiu és establir tants ...

    A cotangent bundle Hamiltonian tube theorem and its applications in reduction theory 

    Teixidó Roman, Miguel (Date of defense: 2015-03-27)

    The Marle-Guillemin-Sternberg (MGS) model is an extremely important tool for the theory of Hamiltonian actions on symplectic manifolds. It has been extensively used to prove many local results both in symplectic geometry ...

    A coupled CFD-DEM model for sand production in oil wells 

    Climent Pera, Natalia (Date of defense: 2016-10-17)

    During the oil recovery a hole is drilled, the sandstone is left unsupported next to the cavity and disloged sand grains can enter the oil recovery system. This process is called sand production and several problems may ...

    A coupled Eulerian-PFEM model for the simulation of overtopping in rockfill dams 

    Larese de Tetto, Antonia (Date of defense: 2012-07-05)

    Rockfill dams are nowadays often preferred over concrete dams because of their economic advantages, their flexible design and thank to the great advance achieved in geosciences and geomechanics. Unfortunately their behavior ...

    A dependency-aware parallel programming model 

    Pérez Cáncer, Josep Maria (Date of defense: 2015-02-11)

    Designing parallel codes is hard. One of the most important roadblocks to parallel programming is the presence of data dependencies. These restrict parallelism and, in general, to work them around requires complex analysis ...

    A Distributed and Heuristic Policy-based Management Architecture for Large-Scale Grids 

    Magaña Perdomo, Edgar (Date of defense: 2008-05-30)

    The aim of this thesis is to design and implement a new Grid Resource Management methodology, where non-massive resources owners would be able to share their resources and integrate human collaboration across multiple ...

    A double full-stack architecture for multi-core quantum computers 

    Rodrigo Muñoz, Santiago (Date of defense: 2023-12-18)

    (English) Despite its tremendous potential, it is still unclear how quantum computing will scale to satisfy the requirements of its most powerful applications. Continued progress in the fabrication and control of qubits ...

    A double-porosity formulation for the THM behaviour of bentonite-based materials 

    Vasconcellos, Ramon Barboza de (Date of defense: 2021-05-18)

    The thermo-hydro-mechanical (THM) behaviour of expansive clays has been extensively studied in the last decades due to the potential use of bentonites as components of engineered barrier systems (EBS) in deep geological ...

    A dynamic adaptive framework for improving case-based reasoning system performance 

    Orduña, Fernando (Date of defense: 2016-02-05)

    An optimal performance of a Case-Based Reasoning (CBR) system means, the CBR system must be efficient both in time and in size, and must be optimally competent. The efficiency in time is closely related to an efficient and ...

    A Dynamic Validation Infrastructure for Interoperable Grid Services 

    Luna García, Jesús (Date of defense: 2008-05-05)

    Los encargados de recursos Grid pueden autorizar el acceso a sus elementos de cómputo por medio de procedimientos bien establecidos para los clientes, regularmente a través del uso de credenciales criptográficas que en su ...

    A dynamical model of a double-deck circular tunnel embedded in a full-space 

    Clot Razquin, Arnau (Date of defense: 2014-02-20)

    This thesis presents a three-dimensional dynamic model of a double-deck circular tunnel embedded in a full-space. The model uses the receptance method to obtain the response of the complete structure from the response of ...

    A filtering engine for large conceptual schemas 

    Villegas Niño, Antonio (Date of defense: 2013-01-29)

    A Finite Element Model for Free Surface and Two Fluid Flows on Fixed Meshes 

    Coppola Owen, Herbert (Date of defense: 2009-06-19)

    Los flujos con interfaces móviles (problemas de superficie libres y de dos fluidos) aparecen en numerosas aplicaciones de ingeniería. Los métodos presentados en esta tesis están orientados principalmente a la simulación ...