而且，利用双狭缝滤波和“交叉滤波”技术能够提取出具有位相调制或者是具有振幅起伏的近场波面。
And the techniques of double-slit filter and "cross-filter" can be used to extract the near field wavefront of the laser beam with phase modulation and amplitude fluctuation.
本文得到了在波导传播中的无方向性点源的平均声压、平均强度和声信号振幅的起伏率。
The mean pressure, mean intensity, and the coefficient of variation of amplitude of the signal propagated in wave-guide were obtained in this paper.
当振幅调制为灰尘颗粒时，功率增益谱出现起伏，并且产生尖峰。
As the modulation of amplitude is dust particle, the fluctuation and peaks are shown in the power gain spectrum.
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