That can be regarded as a phase comparison protection and also has the function of amplitudecomparison.
它具有相位比较的功能，也兼有幅值比较的作用。
2
A method of determining the highness of an ideal object by beam scanning in the vertical plane and amplitudecomparison.
提出了一种采用波束扫描与多波束目标幅度比较相结合实现目标高度测定的方法。
3
Attenuation of wave amplitude of reservoir rock at simulated high temperature and pressure is measured with spectrum-amplitudecomparison mediod in laboratory.