Ultrasonic phase velocity spectroscopy is a very sensitive technique used in the measurement of material properties. In a phase velocity calculation, ambiguities can arise in the spectral phases, in the form of integer ...

This paper presents some methodologies for reactive energy measurement, considering three modern power theories that are suitable for three-phase four-wire non-sinusoidal and unbalanced circuits. The theories were applied ...

A new and an improved version of the J(1)...J(4) method for optical phase detection, named J(1)-J(3) method, is described, which is more stable to phase drift and simpler for implementation than the original one. The sensor ...

A new and an improved version of the J(1)...J(4) method for optical phase detection, named J(1)-J(3) method, is described, which is more stable to phase drift and simpler for implementation than the original one. The sensor ...

In this paper a novel technique for obtaining the amplitude and phase of optical pulses with time extents as short as tens of ps is presented. The method which is based on the transport-of-intensity equation only requires, ...

La unidad contiene todos los subtemas a tratar a lo largo de 16 semanas de curso. Se divide en 5 partes que contienen ejercicios, animaciones, imágenes, teoría y lecturas recomendadas. Se tratan los sistemas trifásicos ...

The Phase-Locked Loops, conceived in the 1930’s by Henri de Bellescize, and used in a large scale on TV sets and integrated services digital telecommunication networks are nowadays increasing their relevance, being present ...

X-ray multiple diffraction experiments with synchrotron radiation were carried out on pure and doped nonlinear optical crystals: NH(4)H(2)PO(4) and KH(2)PO(4) doped with Ni and Mn, respectively. Variations in the intensity ...

The J(1)...J(3) is a recent optical method for linear readout of dynamic phase modulation index in homodyne interferometers. In this work, the J(1)... J(3) method is applied to measure voltage in an optical voltage sensor. ...