Results 31 to 40 of about 114,029 (207)

Experimental measurements of radar signatures of large wind turbine

open access: yesThe Journal of Engineering, 2019
This study presents preliminary results on the signature of a large offshore wind turbine collected using an active S-band radar. The intensity fluctuations of this clutter signal in the range and Doppler domain are characterised, looking at their ...
Francesco Fioranelli   +6 more
doaj   +1 more source

Velocidade do som no ar e efeito Doppler em um único experimento

open access: yesRevista Brasileira de Ensino de Física
Esse artigo explica uma modificação do clássico experimento de medida da velocidade do som v s no ar livre pelo metodo de medida de tempo de propagacao de ondas sonoras captados por dois microfones, a fim de obter melhor precisao nas medidas ...
Everton Lüdke   +3 more
doaj   +1 more source

Energy composition of high-energy neutral beams on the COMPASS tokamak

open access: yesNukleonika, 2016
The COMPASS tokamak is equipped with two identical neutral beam injectors (NBI) for additional plasma heating. They provide a beam of deuterium atoms with a power of up to ~(2 × 300) kW.
Mitosinkova Klara   +3 more
doaj   +1 more source

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

Performance Evaluation of OTFS-NOMA Scheme for High Mobility Users

open access: yesSakarya University Journal of Computer and Information Sciences, 2023
Orthogonal Time Frequency Space (OTFS) is a promising approach which is widely employed in sixth generation (6G) wireless network systems. Because of its superior performance in high-mobility environments, OTFS modulation has received a lot of attention ...
Arif Başgümüş   +2 more
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

Lightweight and secure vehicle track verification scheme via broadcast communication channels

open access: yes网络与信息安全学报, 2023
In intelligent transportation systems, it is crucial for smart vehicles to broadcast real-time vehicle track messages to coordinate driving decisions and ensure driving safety.However, attackers can manipulate vehicle tracks by modifying timestamps or ...
Zhiqiang NING, Yuanyuan WANG, Chi ZHANG, Lingbo WEI, Nenghai YU, Yue HAO
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

Manual of Transcranial Doppler Ultrasonography

open access: yesKorean Journal of Clinical Laboratory Science
Transcranial Doppler (TCD) ultrasound is a crucial non-invasive tool for assessing cerebral blood flow and is widely used to diagnose and monitor cerebrovascular diseases.
Ho Tae JEONG, Soo Na JEON, Sol HAN
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

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