matlab的fft函数使用注意事项，以及傅里叶变换的特征和理解。-Note the use of matlab' s fft function, as well as the Fourier transform of the characteristic and understanding.

The Hilbert–Huang method is presented with modifications, for time-frequency analysis of distorted power quality signals. The empirical mode decomposition (EMD) is enhanced with masking signals based on fast Fourier transform (FFT), for separat

matlab的FFT事例，关于FFT变换的一些事例，适合初学matlab的(Matlab's FFT case, some examples of FFT transformation, suitable for the initial study of MATLAB)