...心Tei指数的对比研究 脉冲多普勒 【文 摘】目的比较组织多普勒成像（tissue Doppler imaging,TDI）与脉冲多普勒（pulsed Doppler,PD）2种方法所获得的Tei指数对兔心肌梗死模型左心功能的应用价值,并与常规的左心收缩功能指标进行相关性研...
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目的联合应用二维、M -型超声心动图与脉冲多普勒技术评价高血压左心室不同构型左房功能改变。
Objective To evaluate left atrial function by 2-de, M-mode and pulsed Doppler echocardiography in different patterns of left ventricular geometric models.
脉冲多普勒雷达是利用目标与雷达之间相对运动产生的多普勒效应实现测速功能的一种新型雷达。
Pulse Doppler radar is a new type of radar which uses the Doppler effect due to the relative movement between the object and the radar to measure the velocity of the object.
与早期雷达采用距离微分方法测速相比，基于脉冲多普勒理论的雷达测速技术具有实时性好、精度高等优点。
Comparing with the differential range method that early radar adoptive for measuring velocity, the radar, which based on Pulse-Doppler theory, has the better real time capability and high precision.
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