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Mostrando ítems 121-130 de 155
Artículo
Unidimensional modulation technique for cascaded multilevel converters
(Institute of Electrical and Electronics Engineers (IEEE), 2009)
This paper presents a simple and low computational cost modulation technique for multilevel cascaded H-bridge converters. The technique is based on geometrical considerations considering an unidimensional control region ...
Artículo
Analysis of utility and use of a web-based tool for digital signal processing teaching by means of a technological acceptance model
(2007)
This paper presents an exploratory study about the development of a structural and measurement model for the technological acceptance (TAM) of a web-based educational tool. The aim consists of measuring not only the use ...
Ponencia
12-Lead ECG modulator and demodulator equipment for telephony transmission
(2001)
This paper describes a teleassistency system that consists of a modulator equipment for the acquisition. storage and FM transmission of the typical 12 lead ECG signals and a demodulalOf equipment for recovering the original ...
Artículo
Feed-forward Space Vector Modulation for Single-Phase Multilevel Cascade Converters with any DC voltage ratio
(Institute of Electrical and Electronics Engineers (IEEE), 2009)
Modulation techniques for multilevel converters can create distorted output voltages and currents if the DC link voltages are unbalanced. This situation can be avoided if the instantaneous DC voltage error is not taken ...
Ponencia
Knowledge sharing through online communities of practice: the case of linux ports to embedded processors
(IADIS Press, 2009)
The paper explores knowledge sharing processes in online communities analyzing their explicit and stored messages. Their content is processed using latent semantic analysis techniques, obtaining several indicators related ...
Ponencia
Detección automática de faltas empleando lógica borrosa
(2009)
Presentamos a continuación una herramienta para la detección y clasificación de faltas en circuitos analógicos a partir de un reducido conjunto de medidas. Se emplea una estructura formada por neuronas borrosas, que permite ...
Artículo
Improving learning performance in laboratory instruction by means of SMS messaging
(2007)
The study described in this paper outlines an attempt to explore those factors that contribute to learning performance improvement in laboratory instruction. As a case study, the educational methodology involved in a basic ...
Tesis Doctoral
Contribuciones a las técnicas de sincronización en sistemas OFDM
(2005)
Las aplicaciones de banda ancha que emplean modulaciones tradicionales de portadora única presentan limitaciones debidas a la Interferencia entre Símbolos o ISI (Inter Symbol Interference), y la Selectividad tanto en tiempo ...
Ponencia
CD-ROM multimedia como método de ayuda a la enseñanza teórica de un DSP
(2002)
En este documento se presenta un libro electrónico interactivo realizado en el Departamento de Ingeniería Electrónica de la Escuela Superior de Ingenieros de Sevilla. El material didáctico servirá de complemento a las ...
Artículo
Integrated solution for induction motor control
(2002-05)
The command speed has an 'S' shape, typical in vertical operation systems. The reason for this command speed is that a soft acceleration/deceleration avoids abrupt movements in the elevator cabin, increasing the comfort ...