Using frequency spectrum analysis of phase function to calculate its auto power spectrum can reflect its frequency structure.

利用相函数的频谱分析求其自功率谱，可以反映它的频率结构。

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It was found that the transmission spectrum of the filter is the cosine function modulated reflection spectrum of the fiber grating.

结果表明该滤波器的透射光谱是余弦函数调制后的光纤光栅反射光谱。

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At last, making use of the plotting function of MATLAB, the paper carries out simulation analysis from three aspects: auto-correlation function, spectrum and fuzzy function.

最后，利用M atlab软件的作图功能，从自相关函数、频谱函数和模糊函数三个方面对M波形的性能进行了仿真分析。

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But I know several professionals who see a wide range of people on the autism spectrum and who have a very different attitude about the relevance of function.

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