从连续傅里叶变换出发，讨论连续傅里叶变换情况下的傅里叶变换性质，给出离散傅里叶变换情况下的傅里叶变换性质。

Starting from continuous Fourier transform, the properties of continuous Fourier transform are discussed, and the paper gives the properties of discrete Fourier transform.

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应用离散傅里叶变换dft，通过MATLAB实现对连续信号频谱分析，以满足理论分析和工程实际的需要。

Application DFT Discrete Fourier Transform, right through MATLAB continuous signal spectrum analysis, in order to meet the theoretical analysis and practical needs.

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利用傅里叶变换红外(FTIR)光谱技术可以对气体组分的浓度进行连续的在线定量分析。

Fourier transform infrared spectroscopy (FTIR) can be used for the continuously on line quantitative determination of the concentrations of several gas components in smoke gas.

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利用傅里叶变换红外(FTIR)光谱技术可以对气体组分的浓度进行连续的在线定量分析。

Fourier transform infrared spectroscopy (FTIR) can be used for the continuously on line quantitative determination of the concentrations of several gas components in smoke gas.

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