A new approach to eliminate impacts of high-resistance faults by compensation of traditional distance relays’ input signals

2021 ◽  
Vol 194 ◽  
pp. 107098
Author(s):  
Hamed Abdollahzadeh
Keyword(s):  
High Resistance ◽  
New Approach ◽  
Input Signals ◽  
Distance Relays

scholarly journals A Method of Speech Coding for Speech Recognition Using a Convolutional Neural Network

Symmetry ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1185 ◽  
Author(s):  
Mariusz Kubanek ◽  
Janusz Bobulski ◽  
Joanna Kulawik
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Speech Recognition ◽  
Network Structure ◽  
High Resistance ◽  
Vocal Tract ◽  
Continuous Speech ◽  
Mel Frequency Cepstral Coefficients ◽  
New Approach ◽  
Neural Network Structure

This work presents a new approach to speech recognition, based on the specific coding of time and frequency characteristics of speech. The research proposed the use of convolutional neural networks because, as we know, they show high resistance to cross-spectral distortions and differences in the length of the vocal tract. Until now, two layers of time convolution and frequency convolution were used. A novel idea is to weave three separate convolution layers: traditional time convolution and the introduction of two different frequency convolutions (mel-frequency cepstral coefficients (MFCC) convolution and spectrum convolution). This application takes into account more details contained in the tested signal. Our idea assumes creating patterns for sounds in the form of RGB (Red, Green, Blue) images. The work carried out research for isolated words and continuous speech, for neural network structure. A method for dividing continuous speech into syllables has been proposed. This method can be used for symmetrical stereo sound.

Detecting High Impedance Faults Utilizing Combined Phase Voltages with Neutral Line Current

2005 ◽  
Vol 2 (2) ◽  
Author(s):  
Ming-Ta Yang ◽  
Jhy-Cherng Gu
Keyword(s):  
Neutral Line ◽  
Discrete Wavelet ◽  
New Approach ◽  
Line Current ◽  
High Impedance ◽  
Three Phase ◽  
Input Signals ◽  
Distribution Feeder ◽  
High Impedance Faults ◽  
Distinct Features

This study aims to present a new approach to detecting high impedance faults (HIFs) in the distribution feeder. Discrete wavelet transformations (DWT) and neural networks (NN) have been widely applied in power system research. Consequently, this study developed a novel technique to discriminate effectively between the HIFs and the switch operations by combining DWT with NN. The proposed approach has three distinct features. First, the input signal of this algorithm is neutral line current, rather than the conventional currents based on three individual phases. Second, HIFs identification uses the details at levels 3, 4 and 5 and the approximations at level 5 of the neutral line current are utilized for. Third, the input signals of the three-phase voltages classify the faulty and healthy phases. The results of simulation and field staged fault clearly show that the proposed technique can accurately identify the HIFs in the distribution feeder.

Well Testing by Sinusoidal Stimulation

2015 ◽  
Vol 18 (03) ◽  
pp. 441-451 ◽  
Author(s):  
Federico Zenith ◽  
Bjarne Foss ◽  
Johannes Tjønnås ◽  
Agus Hasan
Keyword(s):  
Oil And Gas ◽  
Field Tests ◽  
Measurement Precision ◽  
Well Testing ◽  
Gas Wells ◽  
New Approach ◽  
Input Signals ◽  
Simultaneous Testing ◽  
Sinusoidal Oscillations ◽  
Synthetic Test

Summary A new approach to testing of oil and gas wells by means of sinusoidal oscillations in flow and pressure instead of the traditional buildup test is proposed in this article. This approach allows faster testing and simultaneous testing of several wells, with no need for a dedicated test header; it can also be adjusted to strike an appropriate compromise between measurement precision and production loss. This study details various operating issues such as generation of input signals, choice of test frequencies, applicability, and interpretation of results. To demonstrate the method, both a synthetic test and several field tests are presented.

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

Sign in / Sign up

Export Citation Format

Share Document