中文说明：
fft与边际谱的对比，并画出hilbert图和三维时频谱图
English Description：
FFT and marginal spectrum are compared, and Hilbert diagram and three-dimensional time-frequency spectrum are drawn
FFT and marginal spectrum draw Hilbert diagram and three-dimensional time-frequency spectrum
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中文说明：
fft与边际谱的对比，并画出hilbert图和三维时频谱图
English Description：
FFT and marginal spectrum are compared, and Hilbert diagram and three-dimensional time-frequency spectrum are drawnexamplebjp01.m