红外光谱可作为一种信号的功率谱，用富里叶分析来研究。
The fractal characteristics for the Infrared Spectra have been studied by the Fourier analysis and fractal method.
本文应用谐波分析法分析了圆度误差，提出了一种圆度误差的简便分析方法，最后讨论了快速富里叶变换的应用。
Using harmonic analysis, the roundness error is analysed. A handy analytical method of roundness error is presented. Then the application of FFT is discussed.
本文利用广义富里叶级数法对非对称复合材料层板在面内载荷作用下的非线性横向变形或屈曲问题进行了分析。
In this paper, the nonlinear transverse deflection or buckling is analyzed for unsymmetrical composite laminates under loads in plane by means of the generalized Fourier series method.
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