In traditional pulse medical ultrasonic imaging system, the ambiguity function has periodic distance ambiguity and velocity ambiguity, this affects the image quality and resolution.

传统的脉冲式医用超声成像系统的模糊函数由于存在周期性的速度模糊和距离模糊，影响了图像的质量和分辨力。

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In order to achieve a rapid initiation of detonation in a short distance, a flame jet ignition system was applied to the pulse detonation rocket engine (PDRE).

为了实现快速短距起爆，火焰射流点火系统被尝试应用在脉冲爆震火箭发动机上。

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The operating distance of a laser radar system is determined on pulse energy, pulse width, beam divergence angular, atmosphere attenuation, target reflection, receiver sensitivity and so on.

激光雷达系统的作用距离由下列因素决定：脉冲能量、脉冲宽度、光束发散角、大气衰减、目标反射率和接收机灵敏度等。

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