不同于传统股市周期理论，本文使用傅里叶谱分析技术来模拟预报股市周期。
Differing from the traditional theories of stock market cycle, we used the Fourier spectrum analysis method to forecast the cycle.
利用傅里叶级数对其进行了频谱分析，计算了次数小于19次的各次谐波电流均方根值的频谱数据。
Using Fourier series, the frequency spectrum analysis was analyzed, and spectrum data of harmony wave less than 19 were calculated.
然后在白光光学频谱分析系统中，利用放置在傅里叶频谱面上的取样狭缝得到按频率假彩色编码的频谱图。
The frequency pseudocolor-coded speech spectrogram is then obtained by means of a sampling narrow slit placed at Fourier plane in white-light optical spectrum analyzer.
用傅里叶频谱分析方法研究了横向莫尔条纹中一个光栅倍频时莫尔条纹的变化。
Based on the lateral Moire fringe of the gratings, the change of Moire fringe was researched by using Fourier spectrum while the frequency of a grating was changed.
本文简要介绍了傅里叶红外光谱仪的原理和构造，综述了傅里叶红外光谱分析在环境试验中的应用以及分析、研究方法和技术。
The principle and construct of FTIR and its application in environmental testing were introduced. The analysis and study methods and technology were also summarized.
把傅里叶频谱分析方法引入棱镜-薄膜波导耦合系统的输入输出耦合问题，快速而完整地求解了系统输入输出耦合方程组。
The Fourier spectral analysis method is applied to the input-output coupling problem of a prism-thin film waveguide system. The input-output coupling equations are solved fast and exactly.
把傅里叶频谱分析方法引入棱镜-薄膜波导耦合系统的输入输出耦合问题，快速而完整地求解了系统输入输出耦合方程组。
The Fourier spectral analysis method is applied to the input-output coupling problem of a prism-thin film waveguide system. The input-output coupling equations are solved fast and exactly.
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