Now showing items 51-70 of 94

    Machine learning-based techniques for indoor localization and human activity recognition through wearable devices 

    Sansano Sansano, Emilio (Date of defense: 2020-12-22)

    This thesis approaches the study of several machine learning techniques to improve the performance of indoor positioning systems, with a special focus on wearable and low-cost devices. It also presents some tools designed ...

    Making Biosignals Available 

    Alfaras Espinàs, Miquel (Date of defense: 2021-10-22)

    This thesis is an invitation to rethink how simplistic approaches to biosignal processing enrich the potential of personal sensing in line with the fast development of what have come to be undeniably ubiquitous technologies. ...

    Matrix computations on graphics processors and clusters of gpus 

    Igual Peña, Francisco Daniel (Date of defense: 2011-05-25)

    Las arquitecturas destinadas a computación de altas prestaciones (HPC) basadas en aceleradores gráficos (GPUs) se han convertido en los últimos años en una alternativa extendida que combina altas prestaciones y un bajo ...

    Metodología de predicción de rendimiento de aplicaciones MapReduce iterativas sobre una nube híbrida 

    Clemente Castelló, Fancisco José (Date of defense: 2017-06-15)

    El cloud-bursting (despliegue de nube híbrida que complementa temporalmente máquinas virtuales locales con máquinas vituales remotas) ha experimentado una rápida adopción entre los usuarios de análisis de big data. Sin ...

    Mixed Reality Human-Robot Interface for Robotic Operations in Hazardous Environments 

    Szczurek, Krzysztof Adam (Date of defense: 2023-10-23)

    This thesis addresses the need for reliable and immersive human-robot interfaces in hazardous environments. Three key goals were achieved. Firstly, techniques were developed to provide immersive interactions while ensuring ...

    Modeling and analyzing opinions from customer reviews 

    García Moya, Lisette (Date of defense: 2016-01-11)

    The main motivation behind this thesis is the problem of aspect-based sentiment summarization and its application to Business Intelligence (BI). Given a collection of opinion posts, aspect-based summarization has to do ...

    Multi-level Parallelization in ROOT: New Patterns, Libraries and Utilities 

    Valls Pla, Xavier (Date of defense: 2018-10-19)

    The Large Hadron Collider (LHC) is generating Physics data at an unprecedented rate that is expected to continue increasing in the future. This situation results in increasing demands in computation and processing power ...

    Multithreaded Dense Linear Algebra on Asymmetric Multi-core Processors 

    Catalán Pallarés, Sandra (Date of defense: 2018-02-06)

    This dissertation targets two important problems. The first one is the design of low-level DLA kernels for architectures comprising two (or more) classes of cores. The main question we have to address here is how to attain ...

    Nuevos Algoritmos Basados en Grafos y Clustering para el Tratamiento de Complejidades de los Datos 

    Guzmán Ponce, Angélica (Date of defense: 2021-03-17)

    La distribución no balanceada de los datos entre las clases, así como la presencia de ruido y el traslape de clases, son complejidades de los datos que a menudo interfieren en el rendimiento de clasificadores. Para afrontar ...

    Ontology refinement for improved information retrieval in the biomedical domain 

    Jimeno Yepes, Antonio José (Date of defense: 2009-06-17)

    Este trabajo de tesis doctoral se centra en el uso de ontologías de dominio y su refinamiento enfocado a la recuperación de la información. El dominio seleccionado ha sido el de la Biomedicina, que dispone de una extensa ...

    Perception-Based Learning for Fine Motion Planning in Robot Manipulation 

    Cervera Mateu, Enric (Date of defense: 1997-10-17)

    Robots must successfully execute tasks in the presence of uncertainty. <br/>The main sources of uncertainty are modeling, sensing, and control. Fine motion problems involve a small-scale space and contact between ...

    Performance and Energy Optimization of the Iterative Solution of Sparse Linear Systems on Multicore Processors 

    Barreda Vayá, María (Date of defense: 2017-03-08)

    En esta tesis doctoral se aborda la solución de sistemas dispersos de ecuaciones lineales utilizando métodos iterativos precondicionados basados en subespacios de Krylov. En concreto, se centra en ILUPACK, una biblioteca ...

    Procedural Generation of Natural Environments 

    Gasch García, Cristina (Date of defense: 2021-03-12)

    The video games, simulators and virtual reality industry increasingly demands more complex and realistic natural environments, which makes manual generation difficult. To solve it, procedural techniques have been developed, ...

    Proposta de mètodes per a la millora i mesurament de la interoperabilitat empresarial 

    Campos Sancho, Cristina (Date of defense: 2010-07-01)

    La interoperabilitat és la capacitat de les empreses per a col·laborar de manera eficient, preservant la seua pròpia identitat i la seua pròpia manera de fer negocis. Para abastar aquest objectiu les empreses necessiten ...

    Qualitative Distances and Qualitative Description of Images for Indoor Scene Description and Recognition in Robotics 

    Falomir Llansola, Zoe (Date of defense: 2011-11-28)

    <p>The automatic extraction of knowledge from the world by a robotic system as human beings interpret their environment through their senses is still an unsolved task in Artificial Intelligence. A robotic agent is in contact ...

    Qualitative theories on shape representation and movement. Application to industrial manufacturing and robotics 

    Museros Cabedo, Lledó (Date of defense: 2006-12-04)

    From the end of 80's there has been a great interest in the study of qualitative models to represent and to reason with spatial aspects. The present work is centred in the development and application of a model to reason ...

    Razonamiento geométrico basado en visión para la determinación y ejecución del agarre en robots manipuladores 

    Sanz Valero, Pedro José (Date of defense: 1996-10-04)

    Se presenta un sistema capaz de coordinar una pinza de dedos plano-paralelos y un sistema de visión con el objetivo de determinar puntos de agarre bajo condiciones de estabilidad.<br/>La elección de puntos de agarre se ...

    Received Signal Strength-based Indoor Positioning: Integrative Outlooks and Solutions 

    Mendoza Silva, Germán Martín (Date of defense: 2020-03-03)

    This thesis mainly deals with the stages of model description and evaluation of Indoor Positioning Systems based on fingerprinting. Its first contribution is a meta-review that addresses the current state of the art and ...

    Representaciones de vocabularios en tareas de traducción automática mediante modelos conexionistas 

    Casañ Núñez, Gustavo Adolfo (Date of defense: 2011-05-06)

    Trabajos anteriores de traducción automática con modelos conexionistas han obtenido resultados interesantes pero han resultado muy problemáticos de adaptar a tareas reales. En este trabajo se parte del modelo RECONTRA (una ...

    Resolución de sistemas de ecuaciones lineales banda sobre procesadores actuales y arquitecturas multihebra. Aplicaciones en control. 

    Remón Gómez, Alfredo (Date of defense: 2008-10-03)

    Los sistemas de ecuaciones lineales o problemas de mínimos cuadrados aparecen en un amplio abanico de aplicaciones científico-técnicas. En ocasiones la matriz ligada al problema presenta una estructura banda o bien es una ...