It is then subject to such mathematical indignities as wavelet decomposition, multi-resolution Fourier analysis, polyphase filtering and discrete cosine transformation.
接下来它还要经过一些数学处理程序，比如小波分解，多重分辨率傅立叶分析，多相过滤，离散余弦变换等。
This paper presents calculation of frequency and phase difference of flow signals with spectrum analysis on basics of Fourier transform (DFT).
本文采用基于傅立叶变换(DFT)的频谱分析方法，计算流量信号的频率和相位差。
The mechanism of de-inking of photocopy waste paper with solvent treatment was investigated by Fourier transforming infrared spectrum (FT-IR), image-scanning and microscope analysis.
采用傅立叶变换红外光谱、图像扫描和显微分析等手段，研究了静电复印废纸溶剂法脱墨的机理。
These analysis method in fault diagnosis process can play an important role, but Fourier analysis method is only suitable for analysis of the continuous, the steady time signal.
这些分析方法在故障诊断过程中起到了重要的作用，但傅立叶分析方法只适合于分析连续的、平稳的时域信号。
This paper will use small signal analysis and split-step Fourier to solve the complex nonlinear Schrodinger equation (NLSE).
本文将结合分步傅里叶方法和小信号分析法来求解复杂的非线性薛定谔方程(NLSE)。
Using Fourier series, the frequency spectrum analysis was analyzed, and spectrum data of harmony wave less than 19 were calculated.
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。
The properties of the product were characterized by thermogravimetry-differential thermal analysis, X-ray diffraction and Fourier infrared transmission spectroscopy.
用差热-热重分析、X射线衍射、红外光谱等手段对样品进行表征。
Conclusions: X ray diffraction Fourier pattern analysis is a feasible method for the identification of Compound Chinese traditional medicine preparation.
结论：X衍射分析法是鉴定与识别中药复方制剂一种可行方法。
By a simple Fourier analysis, this paper introduces how to design a direct torque controller according to fuzzy logic control principle.
用傅立叶分析，把变频调速原理引入直接转矩控制中，并在此思想指导下设计了模糊速度控制器，大大简化了系统设计和计算。
The process of reconstructing a function of time or space from its sinusoidal components determined in Fourier analysis.
根据其正弦型分量用傅立叶分析方法重建一个时间或空间函数的过程。
The analysis based on theory of Fourier optics is in accordance with the results of experiment.
建立在付立叶光学理论基础上的分析与实验结果是一致的。
The analysis based on the Fourier optical theory is coherent with the experimental results.
建立在傅立叶光学理论基础上的分析与实验结果是一致的。
In the field of signal analysis, the DFT (Discrete Fourier Transform) is a well known term.
在信号分析领域，DFT(离散傅立叶变换)是一个常见术语。
Basic theory of spectrum analysis and Fast Fourier Transform (FFT) algorithm are briefly introduced.
简介了频谱分析的基础理论和快速傅利叶变换(FFT)算法。
In some circuit textbooks the rectifier circuit with the filter has been used as an example to illustrate the harmonic analysis of nonsinusoidal circuit adopted Fourier series.
在一些电路教材中常把带滤波器的整流电路作为一个实例，用以讲述用傅立叶级数的谐波分析方法来求解非正弦电路。
In the theory of the system, the tools of Fourier analysis or Fourier transform enable us to analyze the response of a LTI system, such as a circuit, to such sinusoidal inputs.
在系统理论中，付里叶分析与付里叶变换的工具使我们能够对一个线性时不变系统在正弦激励下的响应进行分析，比如一个电路对正弦输入下的响应。
The relative waveforms, such as maximum frequency, mean frequency and bandwidth, were obtained using the short time Fourier analysis of those simulated signals.
对这些仿真信号进行短时傅里叶分析，求出相应的最大频率、平均频率和频谱宽度等曲线。
A novel method about two dimension Fourier frequency analysis is proposed in order to obtain high radial rotate precision.
为了改善高速磁浮主轴的径向回转精度，该文提出了二维傅里叶频率分析的新方法。
Fourier analysis is the mathematical method used to break sounds down into sine waves.
傅里叶分析是将声音分解为正弦波的数学方法。
Differing from the traditional theories of stock market cycle, we used the Fourier spectrum analysis method to forecast the cycle.
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。
By use of the angular-spectrum analysis and the Fourier transform method, a correction method is obtained to describe the propagation of few-cycle pulsed beam with constant beam waist.
利用角谱分析和傅里叶变换的方法，得到一种描述几个周期的等束腰宽度脉冲光束传输的脉冲修正方法。
As for some of the unsteady vibration signals of diesel engine, false result may be provided by using Fourier analysis, thus error diagnosis would be induced.
传统的振动分析常采用傅立叶分析法，对于柴油发动机某些非平稳振动信号，傅立叶分析可能给出虚假的结果，从而导致错误诊断。
The procedure is based upon recent advances in multibody dynamics and in Fourier analysis.
本方法应用了多体动力学和傅利叶分析的最新成就。
Fourier analysis method is proposed for analyzing the discontinuous time series of pressure.
提出了一种用于对不连续压力采样序列的傅立叶分析方法。
The special property analysis of Fourier transform on image processing is first given in this paper, and the physical significance of Fourier transform is also given.
针对数字图像处理的特点，对傅立叶变换用于图像处理的特性进行了分析，给出了傅立叶变换用于图像处理时的物理意义。
Here, secondary treatment methods are introduced in detail, include time domain signal statistics character, frequency analysis fast Fourier transform (FFT), and short time Fourier transform (STFT).
这里，主要对二次处理的方法作了详细的介绍，包括时域信号的统计特征，频域分析的傅立叶变换和短时傅立叶变换。
The fractal characteristics for the Infrared Spectra have been studied by the Fourier analysis and fractal method.
红外光谱可作为一种信号的功率谱，用富里叶分析来研究。
In this paper, a new Fourier analysis technique called the arithmetic Fourier transform (AFT) is used to compute DFT.
本文采用一种新的傅里叶分析技术—算术傅里叶变换(aft)来计算dft。
Applying Fourier transform frequency spectrum analysis, the equivalent formula and arithmetic for calculating the dielectric loss at power frequency are deduced.
基于这种变频法思想，结合傅里叶变换频谱分析法推导了介质损耗参数的工频等效计算公式和算法。
It can be taken as a kind of discrete signal and do spectrum analysis by discrete Fourier transform.
在计算生物学中，常采用离散傅立叶变换进行频谱分析。
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