DOPPLER

作品数：612被引量：1436H指数：14
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Application of EEMD combined with cross-correlation algorithm in Doppler flow signal
《Journal of Measurement Science and Instrumentation》2025年第1期58-65,共8页SHI Fengdong GONG Ruishi LIANG Tongtong LÜDong 
supported by National Natural Science Foundation of China(No.61973234);Tianjin Science and Technology Plan Project(No.22YDTPJC00090)。
To address the issue of low measurement accuracy caused by noise interference in the acquisition of low fluid flow rate signals with ultrasonic Doppler flow meters,a novel signal processing algorithm that combines ens...
关键词：ultrasonic Doppler flow meter ensemble empirical mode decomposition(EEMD) CROSS-CORRELATION fast Fourier transform(FFT)spectrum analysis energy entropy 
Experimental Study of Liquid Metal Flow for the Development of a Contact-Less Control Technique
《Fluid Dynamics & Materials Processing》2024年第7期1553-1564,共12页Aleksandr Poluyanov Ilya Kolesnichenko 
supported by Russian Science Foundation Grant RSF-22-19-20106。
The article presents an experimental study on the flow of an eutectic gallium alloy in a cylindrical cell,which is placed in an alternating magnetic field.The magnetic field is generated by a coil connected to an alte...
关键词：Ultrasonic doppler velocimeter electrically conductive medium azimuthal pinch experiment in liquid metal MAGNETOHYDRODYNAMICS 
Simultaneous measurement of velocity profile and liquid film thickness in horizontal gas–liquid slug flow by using ultrasonic Doppler method被引量：3
《Chinese Journal of Chemical Engineering》2023年第6期323-340,共18页Lusheng Zhai Bo Xu Haiyan Xia Ningde Jin 
supported by the National Natural Science Foundation of China(41974139,42274148,42074142)。
Horizontal gas-liquid two-phase flows widely exist in chemical engineering,oil/gas production and other important industrial processes.Slug flow pattern is the main form of horizontal gas-liquid flows and characterize...
关键词：Gas–liquid flow Complex fluids Measurement Ultrasonic Doppler Velocity profile Liquid film thickness 
Study of Fourier-Based Velocimetry
《Open Journal of Acoustics》2013年第3期21-32,共12页Jean Martial Mari 
Standard phase-domain pulsed Doppler techniques used in Colour Flow Mapping such as spectral Doppler or autocorrelation are monochromatic, focused on the analysis of the centre transmit frequency. As such all the algo...
关键词：DOPPLER FOURIER ULTRASONIC Imaging WIDEBAND High SPEED 
APPROACH OF IMPROVING PRECISION IN ULTRASONIC DOPPLER BLOODSTREAM SPEED MEASUREMENT BY CHAOS-BASED FREQUENCY DETECTING被引量：3
《Journal of Electronics(China)》2006年第3期457-460,共4页Zhang Shuqing Jin Shijiu Lv Jiangtao Zhang Liguo Li Jun 
Supported by the National Natural Science Foundation of China (No.60102002)the Huoyingdong Education Foundation (No.81057)the Doctoral Foundation of Hebei Province of China(No.B2004522).
It is critical for cerebral vascular disease diagnosis through Doppler to detect the maximum and the minimum of the carotid blood flow speed accurately. A kind of Duffing system under an external periodic power with d...
关键词：CHAOS Frequency detecting Bloodstream speed measuring Ultrasonic Doppler Signal-to-Noise Ratio （SNR） Measuring precision 
Portal vein pulsatility index is a more important indicator than congestion index in the clinical evaluation of right heart function被引量：1
《World Journal of Gastroenterology》2006年第5期768-771,共4页Cheng-Yen Shih Sien-Sing Yang Jui-Ting Hu Chin-Lin Lin Yung-Chih Lai Cheng-Wen Chang 
Supported by the grant from the Cathay Groups,Taipei,Taiwan,China
AIM： To study the changes of portal blood flow in congestive heart failure. METHODS： We studied the congestion index （CI） and portal vein pulsatility index （PI） in patients with varied degrees of congestive hear...
关键词：Portal blood flow Heart failure Ultrasonic Doppler Congestion index Portal vein pulsatility index 
Hydrodynamic Behavior of Three-Phase Airlift Loop Slurry Reactor
《Tsinghua Science and Technology》2002年第1期17-24,共8页任飞 王金福 王铁峰 金涌 
A novel fiber optic probe system and a set of commercial ultrasonic Doppler velocimeters have been used to study the hydrodynamic behavior of a three phase airlift loop (TPAL) slurry reactor. Experiments have been ...
关键词：three  phase airlift loop (TPAL) slurry reactor HYDRODYNAMICS optic fiber probe ultrasonic Doppler velocimeter 
SOURCE OF DOPPLER EFFECT IN BLOOD FLOW被引量：1
《Chinese Journal of Biomedical Engineering(English Edition)》1996年第4期139-146,共8页Wang Weiqi,Yu Jianguo,Shao Qianming,Yi Yanhua(Department of Electronic EngineeringFudan University, Shanghai, 200433, China) 
Ordinary the Doppler effect in blood now was explained with thevariation of period or wavelenth. From vector compositing, the Doppler errect inblood flow is now explained with the variation of propergation velocity of...
关键词：BLOOD now ULTRASONIC DOPPLER efrect rrequency shirt. 
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