The maximum amplitude, stability and amplitude jump of main resonance describe the primary characters of a drive shaft.

传动轴主共振的最大振幅、稳定性、振幅突变性是其主要特性。

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For obtaining a pulse series with a small amplitude ripple, an Erbium-doped Fiber Amplifier (EDFA) must be added into the primary experiment setup to enhance injection-modulation signal power.

为了获得振幅均衡的有理数谐波锁模脉冲，必须在原有的实验装置中添加一个掺铒光纤放大器(EDFA)以提高注入调制光信号功率。

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Pulse signal is one of the most primary physiological signals, including the pulse frequency, the pulse rhythm, pulse-filling ratio, state of stream, state of motion, fluctuation amplitude and so on.

脉象信号，是人体最重要的生理信号之一，包括频率、节律、充盈度、通畅的情况、动势的和缓、波动的幅度等。

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