It is then subject to such mathematical indignities as wavelet decomposition, multi-resolution Fourier analysis, polyphase filtering and discrete cosine transformation.

接下来它还要经过一些数学处理程序，比如小波分解，多重分辨率傅立叶分析，多相过滤，离散余弦变换等。

youdao

This paper presents calculation of frequency and phase difference of flow signals with spectrum analysis on basics of Fourier transform (DFT).

本文采用基于傅立叶变换(DFT)的频谱分析方法，计算流量信号的频率和相位差。

youdao

These analysis method in fault diagnosis process can play an important role, but Fourier analysis method is only suitable for analysis of the continuous, the steady time signal.

这些分析方法在故障诊断过程中起到了重要的作用，但傅立叶分析方法只适合于分析连续的、平稳的时域信号。

youdao

To do so, astronomers resort to Fourier analysis, a mathematical technique that allows them to break a complex curve into a set of simple ones called sine waves.

ECONOMIST: Extrasolar planets