32工作频率(operating frequency)为4 MHz,待测血流流速为15.4 cm/s,都卜勒角度(Doppler angle) 为零度,则超音波都卜勒位移(Doppler shift)约为多少kHz
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A four-beam acoustic doppler current profiler (ADCP) is often used at an Angle.
实际使用中，声学多普勒流速剖面仪(ADCP)常常处于倾斜状态。
Ocular structures of 32 cases (64 eyes) with acute primary Angle closure glaucoma were measured by color doppler instrument.
本文采用彩色多普勒仪对32例(64眼)原发性急性闭角型青光眼进行活体结构测量。
Signal processing model is established, which is based on single pulse angle tracking system, mainly including AGC, Doppler signal detecting and angle tracking.
信号处理模型则根据单脉冲体制角度跟踪系统的处理模式建立，包括自动增益控制、 多普勒 信号检测和角跟踪处理等；
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