Browsing by Subject "621.3"
Now showing items 21-40 of 1312
Acoustic precision livestock technologies applied in intensive production of Broiler Chickens for measuring productivity and animal welfare
Durant el darrer segle, la població mundial ha experimentat un creixement exponencial i s'ha produït un increment de població de 5 800 milions de persones. L'augment de la població mundial ha tingut un impacte directe a ...
Acoustic underwater target tracking methods using autonomous vehicles
Marine ecological research related to the increasing importance which the fisheries sector has reached so far, new methods and tools to study the biological components of our oceans are needed. The capacity to measure ...
Active gate drivers for high-frequency application of SiC MOSFETs
The trend in the development of power converters is focused on efficient systems with high power density, reliability and low cost. The challenges to cover the new power converters requirements are mainly concentered on ...
Active gate switching control of IGBT to improve efficiency in high power density converters
Insulated gate bipolar transistor (IGBT) power semiconductors are widely employed in industrial applications. This power switch capability in high voltage blocking and high current-carrying has expanded its use in power ...
Adaptive Communications for Next Generation Broadband Wireless Access Systems
Un dels aspectes claus en el disseny i gestió de les xarxes sense fils d'accés de banda ampla és l'ús eficient dels recursos radio. Des del punt de vista de l'operador, l'ample de banda és un bé escàs i preuat que s´ha ...
Adaptive load consumption modelling on the user side: contributions to load forecasting modelling based on supervised mixture of experts and genetic programming
This research work proposes three main contributions on the load forecasting field: the enhancement of the forecasting accuracy, the enhancement of the model adaptiveness, and the automatization on the execution of the ...
Adaptive pre-distortion for nonlinear high power amplifiers in OFDM systems
El acelerado crecimiento de las comunicaciones a través de plataformas de transmisión en banda ancha por vía alámbrica e inalámbrica, sumado al uso cada vez más extenso de modulaciones de amplitud no constante que, debido ...
Adaptive radio resource management for ofdma-based macro- and femtocell networks
Las demandas y expectativas de los usuarios y operadores móviles crecen sin parar y, consecuentemente, los nuevos estándares han incorporado tecnologías de acceso de radio cada vez más eficientes. Las especificaciones ...
Adaptive self-mixing interferometry for metrology applications
Among the laser based techniques proposed for metrology applications, classical interferometers offer the highest precision measurements. However, the cost of some of the elements involved and the number of optical components ...
Addressing practical challenges for anomaly detection in backbone networks
Network monitoring has always been a topic of foremost importance for both network operators and researchers for multiple reasons ranging from anomaly detection to tra c classi cation or capacity planning. Nowadays, as ...
Admission control in mobile cellular networks: design, performance evaluation and analysis
Key to the success of the mobile telecommunication systems is provision of mobility and more specifically, continuity of communication sessions on the move. However, from engineering point of view the cobination of scarce ...
Advance control of multilevel converters for integration of distributed generation resources into ac grid
Distributed generation (DG) with a converter interface to the power grid is found in many of the green power resources applications. This dissertation describes a multi-objective control technique of voltage source ...
Advanced adaptive compensation system for free-space optical communications
Massive amounts of information are created daily in commercial fields like earth observation, that must be downloaded to earth ground stations in the short time of a satellite pass. Today, much of the collected information ...
Advanced AlGaN/GaN HEMT technology, design, fabrication and characterization
Nowadays, the microelectronics technology is based on the mature and very well established silicon (Si) technology. However, Si exhibits some important limitations regarding its voltage blocking capability, operation ...
Advanced analysis of microelectronic devices and systems by lock-in IR thermography
Desde los inicios de la revolución microelectrónica, su evolución tecnológica siempre se ha visto marcada por la búsqueda constante de dispositivos y sistemas electrónicos monolíticos más compactos, fiables y robustos, ...
Advanced c-Si solar cell structures: application of laser processes and optical nanostructures
(English) This thesis works towards efficient and cost-effective methods to improve the performance of thin silicon solar cells. Focusing on two principal objectives, the Thesis develops novel techniques to enhance the ...
Advanced characterization methodologies of the time dependent variability in CMOS technologies
L'escalat de les tecnologies CMOS és la causa de la gran millora del rendiment dels sistemes electrònics durant les últimes dècades. Tanmateix, amb la disminució de les dimensions dels dispositius, apareixen nous problemes ...
Advanced control techniques for the heart rate during treadmill exercise
L’objectiu d’aquest treball és el disseny d’un controlador de velocitat per a una cinta de córrer de manera que la freqüència cardíaca d’una persona que corre sobre ella segueixi un perfil determinat, potencialment variable ...
Advanced data-driven fault diagnosis schemes for active distribution grids
(English) Reliable and uninterrupted power supply is crucial for modern societies. Therefore, the minimization of the power outages' duration is a priority for the power system operators. This thesis aims to contribute to ...
Advanced digital resonant control techniques for grid-connected voltage source converters
It is a fact that the presence of power distributed generation sources in the electrical sector is growing exponentially worldwide. This can mainly be explained by the increase of renewable energy production, which involves ...
