目的：探讨脉冲波多普勒组织成像(PW - DTI)在评价冠心病患者主动脉弹性时的应用价值。
Objective: to determine clinical value of pulsed wave Doppler tissue imaging (PW-DTI) in evaluating aortic elasticity in coronary heart disease.
目的设计一套数字化脉冲波超声多普勒系统，以实现多深度血流频谱分析和显示。
Objective To design a digital multigated PW ultrasound Doppler system and validate the system in experimental study.
对于使用高脉冲重复频率的主动多普勒雷达导引头，连续波近似法不仅计算相对简单，而且可以给出较高的计算精度。
For a Doppler radar homing seeker with high pulse repetition frequency, the continuous wave approximation is not only simple, but also has a high calculation accuracy.
在降雨条件下，多普勒效应后毫米波脉冲频谱发生展宽和压缩。
The spread and compress of millimeter wave pulse frequency spectrum will happen in Doppler Effect during rain.
阐述了准连续波雷达的特点，并对脉冲多普勒雷达、连续波雷达和准连续波雷达进行了比较，结果表明准连续波雷达优于脉冲多普勒雷达和连续波雷达。
This paper expouds the characteristics of quasi-continuous wave(CW) radar, and compares the pulse Doppler radar with CW radar and quasi-CW radar.
阐述了准连续波雷达的特点，并对脉冲多普勒雷达、连续波雷达和准连续波雷达进行了比较，结果表明准连续波雷达优于脉冲多普勒雷达和连续波雷达。
This paper expouds the characteristics of quasi-continuous wave(CW) radar, and compares the pulse Doppler radar with CW radar and quasi-CW radar.
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