Results 21 to 30 of about 113,240 (161)

Lateral velocity measurement and error analysis

open access: yesThe Journal of Engineering, 2019
Most existing velocity measurement methods can only calculate the radial velocity by Doppler effect. Here, the authors study the method of measuring the lateral velocity.
Mengye Qiang, Yechao Bai, Xinggan Zhang
doaj   +1 more source

Doppler sonar analysis of swallowing sounds in normal pediatric individuals Análise dos sons da deglutição pelo sonar Doppler em indivíduos normais na faixa etária pediátrica

open access: yesBrazilian Journal of Otorhinolaryngology, 2009
Among the methods for assessing swallowing sounds - videofluoroscopy modified barium study, fiberoptic swallowing endoscopy, neck auscultation through a microphone, accelerometer and, more recently, the Doppler sonar - we have chosen the latter.
Cibele Fontoura Cagliari   +3 more
doaj   +1 more source

Accelerated Algorithm based on Modified Z-Buffer for Numerically Simulating the Dynamic Radar Echo from Wind Turbines [PDF]

open access: yesJournal of Electromagnetic Engineering and Science
As wind farms increase in scale, the computation speed of traditional methods struggles to meet the requirements for simulating the dynamic radar echo they produce.
Bo Tang   +5 more
doaj   +1 more source

Magnetostriction quasi-static measurements with laser Doppler effect

open access: yes工程科学学报, 2016
A quasi-static method for measuring the magnetostrictive coefficient of Fe-Ga alloys by using laser Doppler effect was put forward, and its working principle was also analyzed. The quasi-static magnetostrictive coefficient of Galfenol was measured.
LI Ying-ming   +4 more
doaj   +1 more source

The influence of frequency and amplitude modulation due to the sound source movement on radiated sound characteristics

open access: yesNihon Kikai Gakkai ronbunshu, 2021
The variation of the noise metrics of a group of sound sources due to its movement at a constant velocity along a straight track is discussed in the paper.
Yusuke MAKINO, Yasushi TAKANO
doaj   +1 more source

ENERGY LOSS OF CHARGED PARTICLE ON THE WAVES EXCITATION IN SEMICONDUCTOR CYLINDER WITH TWO-DIMENSIONAL ELECTRON GAS ON THE SIDE SURFACE [PDF]

open access: yesРадиофизика и электроника, 2015
One of the urgent problems of modern radiophysics is the study of the fundamental properties of solid-state structures that contain nanodimension fragments.
A .V. Dormidontov   +2 more
doaj   +1 more source

IDENTIFICATION OF AIR RADAR TARGETS USING THE DOPPLER EFFECT FROM A HEATED JET ENGINE

open access: yesВестник Дагестанского государственного технического университета: Технические науки, 2018
Objectives The aim of the study is to develop a methodology for identifyingaircraft by the deflections of an electromagnetic radar beam by a heated jet engine. Methods Atoms of the crystal lattice of the metallic parts of the operating jet engine will be
P. Sh. Adalaeva   +3 more
doaj   +1 more source

Christian Doppler and the Doppler effect

open access: yesEos, Transactions American Geophysical Union, 1984
A summary is given of Doppler's life and career. He was born 180 years ago on November 29, 1803, in Salzburg, Austria. He died on March 17, 1853 in Venice. The effect bearing his name was first announced in a presentation before the Royal Bohemian Society of the Sciences in Prague on May 25, 1842.
openaire   +1 more source

Forced vibration analysis of rock mass under millisecond delay blasting

open access: yesYantu gongcheng xuebao, 2019
The frequency spectrum analysis of blasting vibration is the basis of blasting vibration control. Based on the blasting vibration data of the dam foundation blasting excavation of Baihetan hydropower station, the frequency spectrum analysis is carried ...
CHEN Jian-long 1, 2, LU Wen-bo 1, 2, SUN Peng-chang 1, 2, CHEN Ming 1, 2, WANG Gao-hui 1, 2, YAN Peng 1, 2
doaj   +1 more source

Difference in determination of surface wave magnitude of the M7.8 Kermadec Island earthquake on March 5,2021 in New Zealand

open access: yes地震科学进展, 2021
A magnitude M7.8 earthquake struck Kermadec Island,New Zealand on March 5,2021. In this study we determined surface wave magnitude using 692 stations from USGS global networks and 112 stations from China global earthquake monitoring system,then analyzed ...
Wenze Deng
doaj   +1 more source

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