Search results for "Transform"
showing 10 items of 3975 documents
El capitalismo, contra el planeta / 1
2007
La izquierda y lo social
2002
La derechización del mundo / 6
2007
Los límites de la tolerancia
1998
¿Qué hacer con Europa?
2005
El socialismo liberal / 5
2008
El enfoque franciscano y la ciencia. De la Escolástica Tardía a la vía moderna
2021
Resumen La Escolástica Tardía marca un hito en la historia del pensamiento filosófico. En este periodo se establecen las bases de un profundo proceso de transformación en la forma de observar la naturaleza a través de una minuciosa recolección de datos, experimentos y posteriores análisis. El enfoque franciscano da prioridad a aquel sentido práctico del filosofar que se funda sobre la existencia real y desembarca en la acción. Los pensadores franciscanos analizan las realidades del mundo con un dinamismo pragmático sumamente original. Abstract Late Scholasticism marks a milestone in the history of philosophical thought. In this period, a profound process of transformation took place in the …
Precision Determination of Cyclotron Frequencies of Free Electrons and Ions
1982
Within the last two decades the electrodynamical storage of electrons and ions developed into an experimental method of great versatility. That this method is now being used in so many different fields of physics and chemistry results primarily from the long storage times which nowadays can be achieved. Under ultrahigh vacuum conditions and in sufficiently strong electromagnetic fields the particles can easily be trapped for hours or even days. This really long storage time offers the possibility of studying reactions of very slow rate to the chemist and of precision measurement of photon-ion interactions to the physicist. The accuracy of photon-ion interaction measurement is finally limite…
The influence of the propagation path length on the results of the time–frequency analysis of the acoustic emission generated by partial discharges i…
2006
The paper presents the measurement results of the acoustic emission (AE) signals generated by partial discharges (PDs) at various thickness of the oil insulation layer. For the AE signals registered the time - frequency analysis was carried out based on the use of the short-time Fourier transform (STFT). Two- and three-dimensional spectrograms of the power spectrum density and the amplitude spectrum were determined. The evaluation of the influence of the propagation path length of the AE signal on the results of the time - frequency analysis was performed through the analysis of the spectrograms determined.
Rogowski coil current transducer compensation method for harmonic active power error
2015
Abstract In the harmonic active power measurement, the highest uncertainties are generally introduced by the current and voltage transducers. In a previous paper, the authors showed that the current transformer (CT) can introduce significant errors in such measurement, especially if the phase shift between voltage and current is close to ±90°. In such condition the errors on harmonic power measurement are mainly due to the CT phase displacement. This paper shows that better results can be achieved with more linear transducers, such as the Rogowski coil current transducers (RCCTs), whose metrological performance in distorted condition can be improved, by means of a proper compensation method…