Listando por título
Mostrando ítems 7754-7773 de 41734
Contributions to the study of periodic orbits and invariant manifolds in dynamical systems
Aquesta tesi tracta l’estudi de varietats invariants i òrbites periòdiques de sistemes dinàmics discrets i continus. La memòria està dividida en dues parts que es poden llegir de manera independent. La primera part (Capítols ...
Contributions to the study of the availability of metal ions in aquatic systems
La disponibilitat de metalls per part dels organismes no depèn únicament de la concentració total sinó també de l'especiació d'aquestes subtancias. En general, la disponibilitat de les espècies metàl•liques en medis naturals ...
Contributions to the theory of Large Cardinals through the method of Forcing
The present dissertation is a contribution to the field of Mathematical Logic and, more particularly, to the subfield of Set Theory. Within Set theory, we are mainly concerned with the interactions between the largecardinal ...
Contributions to TOA-based location with wlan
Location techniques that satisfy the requirements of advanced Location-Based Services (LBS) in environments where GPS fails are needed, therefore accurate indoor positioning is becoming increasingly important. This PhD ...
Contributions to topology discovery, self-healing and VNF placement in software-defined and virtualized networks
The evolution of information and communication technologies (e.g. cloud computing, the Internet of Things (IoT) and 5G, among others) has enabled a large market of applications and network services for a massive number of ...
Contributions to Trajectory Analysis and Prediction: Statistical and Deep Learning Techniques
A causa de l’estreta relació entre la vida de les persones i determinades ubicacions geogràfiques, les dades històriques sobre trajectòries d’una persona contenen informació valuosa que es pot utilitzar per descobrir els ...
Contributions to ultrasonic micro-moulding process of high performance polymers
Polymeric materials, which are suitable for high performance applications for example human implants are one of the most expensive available polymers. Standard injection micromoulding process, dedicated for mass production, ...
Contributions to understanding the mechanisms of action of electrolytic electroporation
Electroporation is a biophysical phenomenon in which cell membrane permeability to ions and molecules is increased when the cell is briefly exposed to high electric fields. Electroporation is the basis of multiple novel ...
Contributions towards softwarization and energy saving in passive optical networks
Ths thesis is a result of contributions to optimize and improve the network management systme and power consumption in Passive Optical Network (PON). Passive Optical Network elements such as Optical Line Terminal (OLT) and ...
Contributrion to the improvement of the soil moisture and ocean salinity (SMOS) sea surface salinity retrieval algorithm
The European Space Agency's Soil Moisture and Ocean Salinity (SMOS) satellite was launched on November, 2, 2009 from the Russian cosmodrome of Plesetsk. Its objective is to globally and regularly collect measurements ...
¿Contribuye la comunicación entre familia y escuela al éxito educativo? Una propuesta de triangulación
Aquesta tesi doctoral explora els processos comunicatius entre les famílies i lescola des duna proposta empírica, sistemàtica i multimodal, pròpia dels estudis dopinió i actitud (Malinverni et al., 2016; Macià, 2019; ...
Control activo de ruido de baja frecuencia de maquinaria industrial en un campo de baja densidad modal, mediante el encapsulado de sus fuentes de ruido
Normally, there are in use certain technologies of reduction of noise named passive, in the cancellation of the noise produced by industrial machinery. These technologies can be applied directly on the source (use of ...
Control adaptativo por modelo de referencia con síntesis de controlador mínima en sistemas con incertidumbre y sujetos a perturbaciones
In this research work, a non-linear technique called Minimum Controller Synthesis (MCS) is presented. This is a variant of the Model Reference Adaptive Control (MRAC), which has the main advantage of requiring very little ...
¿Control administrativo sobre actividad judicial? Régimen disciplinario del juez-burócrata: estudio comparado entre España y Ecuador
En las magistraturas burocráticas, los jueces y magistrados tienen el doble rol de autoridades poderosas y funcionarios públicos. Esta especial característica tiene fuerte incidencia en los métodos de control. Enfocándonos ...
Control and design of pem fuel cell-based systems
Las pilas de combustible son muy ventajosas debido a su alta eficiencia en la conversión de energía y nula contaminación. En esta tesis se realiza un extenso estudio sobre el control y diseño de sistemas de generación ...
Control and management of energy storage systems in microgrids
The rate of integration of the renewable energy sources in modern grids have significantly increased in the last decade. These intermittent, non-dispatchable renewable sources, though environment friendly tend to be ...
Control and modeling techniques in biomedical engineering: the artificial pancreas for patients with type 1 diabetes
This thesis presents different control strategies, for the closed-loop artificial pancreas, which are based on Model Predictive Control (MPC) and Sliding Mode Control (SMC). Multiple MPC with linear models and gain scheduling, ...
Control and modulation of modular multilevel converters
The integration of renewable energy sources in the electrical grid is reducing our dependence on fossil fuels. However, to ensure feasibility and reliability of distributed energy generation, more efficient and higher power ...
Control and operation of multi-terminal VSC-DC networks
For the past century, ac networks have been established as the standard technology for electrical power transmission system s. However, the de technology has not disappeared completely from this picture. The capability of ...
Control and operation of wind power plants connected to DC grids
Remote offshore wind power plants (WPPs) are being linked through high-voltage de voltage-source converter (VSC-HVdc) transmission to the main grids. The current deployments of HVdc grid connections for offshore WPPs are ...
