Meanwhile the vortex shift waveform is obtained from the estimated mean frequency waveform using a suitable low-pass filter. Then the vortex shedding frequency and amplitude can be calculated.
用合适的滤波器可以从估计出的平均频率曲线中得到涡流的波形，并且计算表征涡流的涡流经过频率和幅度特征参数。
The present paper gives an analysis of the low frequency (LF) vortex and divergent circulation systems and their interactions in terms of the ECMWF/WMO data (summer of 1984).
利用1984年夏季ECMWF/WMO资料分析了低频涡度系统和低频辐散环流系统，讨论了两者之间的相互作用。
Moreover, because the intensity of vortex shedding in the wake of the guide vane is too weak, it's frequency has no influence on the vibration characteristics of the low-pressure compressor rotor.
同时由于导流体尾迹内部脱落涡强度太低，其脱落频率也不会对发动机低压转子振动特性产生影响。
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