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A gas kick early detection method outside riser based on Doppler ultrasonic wave during deepwater drilling
《Petroleum Exploration and Development》2020年第4期846-854,共9页YIN Bangtang LIN Yingsong WANG Zhiyuan SUN Baojiang LIU Shujie SUN Jinsheng HOU Jian REN Meipeng WANG Ning 
Supported by Natural Science Foundation of China(51991363);National Program on Key Basic Research Project(973 Program)(2015CB251200);Changjiang Scholars and Innovative Research Team Project(IRT_14R58)
The feasibility of gas kick early detection outside the riser was analyzed based on gas-liquid multiphase flow theory.Then an experimental platform for gas kick early detection based on Doppler ultrasonic wave was est...
关键词：deepwater drilling RISER Doppler ultrasonic wave gas-liquid two phase flow signal analysis early detection of gas kick 
Doppler-free spectroscopy of rubidium atoms driven by a control laser
《Frontiers of physics》2012年第3期311-314,共4页谭政 赵修超 程雍 孙献平 罗军 周欣 王谨 詹明生 
supported by the National Basic Research Program of China(973 Program)(Grant No.2006CB921203);the National Natural Science Foundation of China(Grant No.60977072);the Foundation of Wuhan National Laboratory for 0ptoe1ectronics(Grant No.P080002)
A scheme of Doppler-free spectroscopy is experimentally demonstrated with a co-propagating control laser locking to an atomic hyperfine transition, and the differential transmission of the probe and the reference lase...
Doppler instability of antispiral waves in discrete oscillatory reaction-diffusion media
《Chinese Physics B》2010年第5期154-159,共6页钱郁 黄晓东 廖旭红 胡岗 
Project supported by the National Natural Science Foundation of China (Grant No. 10675020);by the National Basic Research Program of China (973 Program) (Grant No. 2007CB814800)
This paper investigates antispiral wave breakup phenomena in coupled two-dimensional FitzHugh-Nagumo cells with self-sustained oscillation via Hopf bifurcation. When the coupling strength of the active variable decrea...
关键词：antispiral waves break up Doppler instability 
VEHICULAR NODE POSITIONING BASED ON DOPPLER-SHIFTED FREQUENCY MEASUREMENT ON HIGHWAY被引量：3
《Journal of Electronics(China)》2009年第2期265-269,共5页Xu Bo Shen Lianfeng Yan Feng 
Supported by the National Grand Fundamental Research Program of China (973 Program, No.2007CB310606);The National High Technology Research and Development Program of China (863 Program, No.2008AA01Z205);China Postdoctoral Science Foundation funded project
Vehicular node positioning needs to be quick and precise on highway for safety considera-tion.In this paper,we present a novel and practical vehicular node positioning method which can achieve a higher accuracy and mo...
关键词：POSITIONING Doppler-shifted frequency Vehicular Ad Hoc Network（VANET） 
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