The use of Fourier analysis techniques to measure the wavefront power spectral density (PSD) in midfrequency domain is discussed.
波前功率谱密度 （PSD）被用于评价惯性约束聚变激光驱动器光学元件在中频区域的波前误差。
2
The computer model finds that mid-frequency sonar is mostly filtered out for the whales, while the higher frequencies the animals use for hunting appear to be unimpeded by sonar.
电脑模型表明，突吻鲸能过滤掉声纳大部分的中频声波，而声纳也不会影响这些鲸鱼用来捕猎的高频声波。
3
Diamond-like carbon DLC thin films were deposited onto si 100 and high speed steel substrates by mid-frequency magnetron sputtering system SP0806AS, Beijing Power tech Co.