Study on the Amplitude Characteristics of Pitch and Heave Motions for a Ship Based on Frequency Scattering

2011 ◽  
pp. 157-164
Author(s):  
Chen Junfeng ◽  
Zhu Jun
Keyword(s):  
Amplitude Characteristics

scholarly journals A novel fault section locating method based on distance matching degree in distribution network

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Zhenxing Li ◽  
Jialing Wan ◽  
Pengfei Wang ◽  
Hanli Weng ◽  
Zhenhua Li
Keyword(s):  
Single Phase ◽  
Distribution Network ◽  
Matlab Simulink ◽  
Grounding Resistance ◽  
Blind Zone ◽  
System Transition ◽  
Transition Resistance ◽  
Zero Sequence ◽  
Matching Degree ◽  
Amplitude Characteristics

AbstractFault section location of a single-phase grounding fault is affected by the neutral grounding mode of the system, transition resistance, and the blind zone. A fault section locating method based on an amplitude feature and an intelligent distance algorithm is proposed to eliminate the influence of the above factors. By analyzing and comparing the amplitude characteristics of the zero-sequence current transient components at both ends of the healthy section and the faulty section, a distance algorithm with strong abnormal data immune capability is introduced in this paper. The matching degree of the amplitude characteristics at both ends of the feeder section are used as the criterion and by comparing with the set threshold, the faulty section is effectively determined. Finally, simulations using Matlab/Simulink and PSCAD/EMTDC show that the proposed section locating method can locate the faulty section accurately, and is not affected by grounding mode, grounding resistance, or the blind zone.

Energy efficiency of near infrared cobalt luminscence in ZnSe:Co determined by a photoacoustic method

2012 ◽  
Vol 20 (1) ◽  
Author(s):  
Ł. Chrobak ◽  
M. Maliński ◽  
K. Strzałkowski ◽  
J. Zakrzewski
Keyword(s):  
Energy Efficiency ◽  
Frequency Dependence ◽  
Near Infrared ◽  
Transmission Spectra ◽  
Photoacoustic Method ◽  
Infrared Luminescence ◽  
Amplitude Characteristics

AbstractThe paper presents results of computations of the energy efficiency of the cobalt luminescence in ZnSe:Co determined by the photoacoustic method. The transmission spectra, photoacoustic experimental and theoretical spectra, and the frequency dependence on the photoacoustic amplitude characteristics are presented. From them, the energy efficiency of Co2+ the near infrared luminescence (3200 nm) was computed in the frame of new proposed photoacoustic model of computations of the luminescence energy efficiency.

scholarly journals EXPERIMENTAL EXPERIENCE IN STUDYING THE WEIGHT DYNAMICS OF ROTATING GYROSCOPES AND THEIR ROTATION FEATURES AT CRITICALLY LOW SPEEDS, INCLUDING AT SUNRISE AND DURING A LUNAR-SOLAR ECLIPSE

Metaphysics ◽  
2020 ◽  
pp. 102-114
Author(s):  
A. M Panichev
Keyword(s):  
Solar Eclipse ◽  
Weight Changes ◽  
Running Time ◽  
Left Hand ◽  
Speed Range ◽  
Angular Velocities ◽  
Free Running ◽  
The Moment ◽  
Right And Left Hand ◽  
Amplitude Characteristics

The cycle of experiments with free-rolling gyroscopes at different angular velocity intervals including those on scales with continuous-discrete weight registration was carried out. We concluded that the free-running time of gyroscopes in one interval of angular velocities can vary greatly (within hundreds of percent). Measuring the free running time of a gyroscope during a solar eclipse has shown a connection between registered fluctuations in the gyroscope behavior and the eclipse stroke. The data obtained during the periods of sunrise indicate that the gyroscope can react at the moment of the sunrise while recording the true ascent, as well as the ascent preceding the true one with a difference of 8 minutes. Statistical analysis of the graphs of weight changes of the disk at right and left-hand free rotation in the speed range from 5000 to 250 rpm showed that the abnormal weight changes recorded at certain “critical” frequencies with different directions of rotation reliably differ in amplitude characteristics.

scholarly journals Changes in Amplitude Characteristics of Heart Sound Signals during External:cuff:inflation Procedure: A Pilot Study

2016 ◽  
Author(s):  
Xinpei Wang ◽  
Yuanyang Li ◽  
Chengyu Liu ◽  
Changchun Liu ◽  
Lizhen Ji ◽  
...  
Keyword(s):  
Pilot Study ◽  
Heart Sound ◽  
Amplitude Characteristics
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