According to the mechanism of the positron annihilation and the trapping model in solid-state material,the essential information of positron annihilation parameters,such as positron lifetime and the parameter of Doppler line shape,is discussed in this article.
本文根据正电子在凝聚态物质中的湮没机制及捕获模型,讨论了正电子湮没参量———正电子寿命谱和多普勒线形等参量所反映的物质信息,给出了各正电子湮没参量与所反映的物质信息之间的定量关系。
The theory and its processing frame of the time-Doppler curve(TDC) were investigated.
讨论了时间-多普勒曲线的原理与处理框架,然后以其在雷达目标识别中的应用为例勾勒和阐述了其发展的历程与概况。
Correlation of ABI and Vmax with the wave of doppler blood stream in diabetic patients
糖尿病患者踝肱指数与峰值流速和多普勒血流波形相关性的研究
Acoustic Doppler Current Profiler [ADCP]
音波多普勒水流测剖机
Wavelet analysis of laser Doppler perfusion signal in risk area for pressure ulcer
压疮易患组织的激光多普勒血流信号小波分析
ultrasonic Doppler blood flow meter
超声多普勒血液流量计
pulse ultrasonic Doppler blood-flow detector
脉冲超声多普勒血流计
blood flow Doppler
血流多普勒测定系统
Doppler waveforms of the hepatic veins in patients with fatty liver
脂肪肝患者肝静脉血流多普勒频谱形态的观察
The value of the color Doppler flow imaging in the deep vein thrombosis of lower limbs
彩色多普勒血流显像在下肢深静脉血栓形成中的应用
Comparative Analysis of Weather Process and Doppler Radar Echo on Two Convective Weather Events
两次对流天气的天气形势和多普勒雷达回波的对比分析
Doppler ultrasonic blood pressure monitor
多普勒超声波血压监测器
beam configurations of Doppler radar antenna
多普勒雷达天线的波束形状
pulsed wave Doppler ultrasonic flowmeter
脉冲波多普勒超声流量计
range-gated Doppler ultrasonic flowmeter
距离选通脉冲多普勒超声波流量计
laser Doppler perfusion flowmeter
激光多普勒微循环血流仪
The Design of Ultrasound Doppler Blood Flow Speed Detector with an USB Interface;
USB接口超声多普勒血流仪PC外置盒
Doppler evaluation of renal blood flow in alcoholic liver disease patients
酒精性肝病患者肾血流的多普勒评价
The blood flow of cauda equina was measured with laser Doppler flowmeter.
应用激光多普勒血流仪检测马尾神经血流量。
A New Estimator of DOA──Doppler Based on Blind Beamforming
基于盲波束形成的波达方向──多普勒稳健估计