echo Doppler indicator 多普勒回波指示器 ; 回波都卜勒指示器 ; 回声多普勒指示器
echo-doppler 超声多普勒
color echo doppler 彩色多普勒超声
echo doppler spectra 回波多普勒谱
transesophageal echo-doppler 食道超声多普勒
sea echo doppler spectrum 回波多普勒谱
calculation of echo doppler frequency 回波多普勒频率计算
spectral doppler-echo 频谱多普勒
Doppler echo 多普勒回波
Doppler-Echo 超声心动图
Objective:To seek for a new Echo Doppler method which can more sensitively detect changes of left ventricular diastolic function in NIDDM.
目的：应用肺静脉血流图结合二尖瓣血流图评价糖尿病心脏病变引起的左室舒张功能变化，旨在探讨更敏感的检测方法。
This paper introduces several methods retrieving wind direction from HF radar echo Doppler Spectrum and analyses the feature of those methods.
本论文介绍了现有的从高频雷达回波多普勒谱中提取风向的几种方法，分析了这几种方法的不足之处。
The basic work principle of a certain kind of Doppler radar is introduced, the relation between the echo Doppler frequency and other parameters is given.
介绍了多卜勒导航雷达的基本工作原理，推导了回波信号多卜勒频移与系统其它参量间的关系。
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