Now showing items 61-80 of 207

    Control of grid-connected three-phase three-wire voltage-sourced inverters under voltage disturbances 

    Garnica López, Miguel Andrés (Date of defense: 2019-01-11)

    The present doctoral thesis focuses on designing control schemes for three-phase three-wire voltage-sourced inverters connected to the grid under voltage disturbances. The research recognizes the large-scale integration ...

    Planificación óptima de redes eléctricas en baja y media tensión y microrredes eléctricas inteligentes mediante algoritmos linealizados de optimización multicriterio 

    Barrenechea Gruber, Roberto Carlos (Date of defense: 2019-01-11)

    In this work, a new algorithm for the multiobjective optimization of low and medium voltage electrical grids and microgrids is proposed. The originally nonlinear planning model is linearized using the economic current ...

    Una contribución a la evaluación de la adherencia a hábitos de vida saludables basado en aplicaciones móviles 

    Guede Fernández, Federico (Date of defense: 2018-09-06)

    The adherence to a healthy lifestyle plays a key role for increasing life expectancy and living better. The main habits of healthy lifestyle are: physical activity, diet and sleep quality. Nowadays, many people use a ...

    Full time-domain electromagnetic interference measurements and applications 

    Azpúrua, Marco A. (Date of defense: 2018-06-28)

    This thesis presents a technology that has been called the Full Time-Domain Electromagnetic Interference measurement systems and its applications. Full TDEMI measurement systems are an implementation of an FFT-based receiver ...

    On-chip adaptive power management for WPT-Enabled IoT 

    Abdelhameed, Mohamed Ahmed Saad (Date of defense: 2018-06-13)

    Internet of Things (IoT), as broadband network connecting every physical objects, is becoming more widely available in various industrial, medical, home and automotive applications. In such network, the physical devices, ...

    Dynamic modelling and control schemes for current-source resonant converters 

    Ghahderijani, Mohammad Moradi (Date of defense: 2018-10-09)

    This thesis focuses on the control methods applied to current source resonant converters, especially in two different applications of switching power supplies and wire-less power transfer systems. In fact, the existing ...

    Design of broadband inductor-less RF front-ends with high dynamic range for G.hn 

    Trulls Fortuny, Xavier (Date of defense: 2012-07-06)

    System-on-Chip (SoC) was adopted in recent years as one of the solutions to reduce the cost of integrated systems. When the SoC solution started to be used, the final product was actually more expensive due to lower yield. ...

    Inductive contactless energy transfer systems for residential areas 

    Momeneh, Arash (Date of defense: 2016-09-09)

    In recent years, contactless energy transfer systems have been developed and investigated widely. As evident, the transfer energy is performed without physical connection. This technology is classified according to power ...

    Identification and control of diffusive systems applied to charge trapping and thermal space sensors 

    Atienza García, María Terersa (Date of defense: 2018-02-13)

    The work underlying this Thesis, has contributed to the main study and characterization of diffusive systems. The research work has been focused on the analysis of two kind of systems. On the one hand, the dynamics of ...

    Fixed-switching frequency sliding mode control applied to power converters 

    Repecho del Corral, Víctor (Date of defense: 2018-02-21)

    The application of the sliding mode control in power converters has a well-known inconvenient from the practical point of view, which is to obtain fixed switching frequency implementations. This thesis deals with the ...

    Determination of the state of health of Li-ion batteries : the irreversible entropy production approach 

    Ovejas Benedicto, Victòria Júlia (Date of defense: 2017-11-24)

    In recent years, portable applications have experienced an exponential growth and consequently, the demand of batteries has increased accordingly. It is widely known, though, that the performance of batteries decreases ...

    Characterization of alternative carrier selective materials and their application to heterojunction solar cells 

    Gerling Sarabia, Luis Guillermo (Date of defense: 2017-11-15)

    Crystalline silicon (c-Si) solar cells can be considered a highly industrialized and mature product with a record conversion efficiency of 26.6%, not far from the practical limit of 29.4% (for single p/n junction devices). ...

    Diseño del sistema de navegación en inmersión del vehículo Guanay II para aplicaciones de detección y seguimiento de vertidos de hidrocarburos en zonas costeras 

    Galarza Bogotá, Cesar Mauricio (Date of defense: 2018-01-29)

    The study of the seas is a field of science that is in constant development. At the technological level, in recent years, important advances have been made in the design of platforms and measurement systems for oceanographic ...

    Automatic supervision of Pv systems and degradation analysis of thin film PV modules 

    Kichou, Sofiane (Date of defense: 2017-03-10)

    Monitoring and regular performance analysis of Grid-Connected Photovoltaic (GCPV) systems are of primal importance in order to ensure an optimal energy harvesting and reliable power production at competitive costs. Main ...

    Contributions to industrial process condition forecasting applied to copper rod manufacturing process 

    Zurita Millán, Daniel (Date of defense: 2017-09-08)

    Ensuring reliability and robustness of operation is one of the main concerns in industrial anufacturing processes , dueto the ever-increasing demand for improvements over the cost and quality ofthe processes outcome. In ...

    Arquitectura escalable SIMD con conectividad jerárquica y reconfigurable para la emulación de SNN 

    Zapata Rodriguez, Mireya (Date of defense: 2017-09-29)

    A biological neural system consists of millions of highly integrated neurons with multiple dynamic functions operating in coordination with each other. Its structural organization is characterized by highly hierarchical ...

    Self-healing and secure low-power memory systems 

    Neagu, Mădălin (Date of defense: 2017-09-08)

    The main objective of this thesis is to bring new contributions to the self-healing and secure systems domain. In particular, to develop a self-healing technique for memory systems and to increase security of memory systems, ...

    Contribution to the architecture and implementation of Bi-NoC routers for multi-synchronous GALS systems 

    Kamal, Rajeev (Date of defense: 2017-09-22)

    Networks-on-Chip (NoC) is an emerging on-chip interconnection centric platform that influences the modern high speed communication infrastructure to improve on-chip communication challenges in the recent many core ...

    Design exploration and measurement benchmark of integrated-circuits based on graphene field-effect-transistors : towards wireless nanotransceivers 

    Iannazzo Soteras, Mario E. (Mario Enrique) (Date of defense: 2017-09-22)

    This doctoral thesis approaches the design requirements for future high / ultra-high data rate (from 100 Mbps to 100 Gbps) nanotransceivers (nanoTRx) applied to wireless nanonetworks which imply short/ultra-short distance ...

    Dielectric charge control in contactless capacitive MEMS 

    Gorreta i Mariné, Sergi (Date of defense: 2017-09-29)

    Micro-Electro-Mechanical Systems, or MEMS, has been a continuously growing technology during the last decades. Since 1959, when the theoretical physicist Richard Feynman introduced the concept of nanotechnology in his ...