The Fourier transform method has been used to analyze the influence of modal amplitude and phase fluctuations in a mode-locked laser on performance of its output pulse.
用傅里叶变换的方法分析了锁模激光器中模式间的相位和振幅涨落对锁模脉冲列特性的影响。
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。
A new optical image encryption method using anamorphic fractional Fourier transform and double random phase encoding is proposed.
提出一种利用变形分数傅里叶变换和双随机相位编码对图像加密的方法。
A new optical image encryption method using dissymmetrical fractional Fourier transform and double random phase encoding was presented.
提出了一种利用不对称分数傅里叶变换和双随机相位编码对图像加密的方法。
In this paper, we apply the Fourier transform method (FTM) of the phase analysis method to double-exposure holographic interferometry and propose double-exposure digital holographic interferometry.
本文将相位分析技术中的傅立叶变换法(FTM)引入二次曝光全息干涉计量中，提出了二次曝光数字全息干涉术。
A new watermarking detecting algorithm which resists geometric distortion is proposed, based on Fourier-Mellin transform and phase correlation features.
基于傅里叶-梅林变换特性和相位相关性，提出了一种新的抗几何失真数字水印算法。
This paper presents computation of the signal's amplitude spectrum and phase spectrum the Fourier transform.
主要应用傅立叶变换方法计算各种信号的振幅谱和相位谱。
The normalized full gradient and phase of gravity anomalies have been studied by potential field conversion and fast Fourier transform in wave-number domain.
用波数域的位场转换和快速傅立叶变换理论研究重力归一化总梯度和归一化相位；
A two-dimensional phase unwrapping approach based on two-dimensional windowed Fourier transform (WFT) is proposed.
提出了一种基于二维短时傅里叶变换的干涉相位图解缠方法。
A minimum phase signal can be recovered from the magnitude or phase of its Fourier transform.
最小相位信号可由其傅氏变换的幅度或相位来恢复。
When Fourier transform is used to demodulate the modulated fringe pattern, the phase of deformation is calculated and furthermore the deformation is measured accurately.
利用傅里叶变换法，解调出了变形场的相位，从而实现了物体变形场的精确测量。
In the experiment the amplitude of Fourier transform of object is modified to reduce the intensity dynamic range, while phase information is preserved.
据此我们修改了待识别物体的傅里叶变换的振幅，以减小光强度的动态范围。
As a result, with phase unwrapping technique based on Fourier transform, any cross section projection could conveniently be worked out from the Moiré deflectogram of rocket exhausted plumes.
结果发现，根据火箭喷焰的莫尔条纹，采用傅里叶变换相位展开技术，可以方便地提取任意截面的投影信息。
At present, phase shifting method, Fourier transform method and fringe skeleton method are three most important fringe analysis methods.
目前，相移法、傅立叶变换法和条纹骨架法是三种主要的提取相位的方法。
Fourier transform profilometry and Phase shifting are two important methods in 3-d measurement of body.
傅里叶变换轮廓术和相移法是投影栅法测物体三维形貌的两种重要方法。
The phase shift in complex spectrum of Fourier transform infrared (FTIR) spectrometer was discussed. A rigorous derivation showed the relation between the phase shift and complex spectrum.
主要讨论了傅里叶变换红外光谱仪的相位偏移产生的原因，并且用严密的数学推导证明了相位偏移与复数光谱之间的关系。
A new optical encryption technique based on double random phase computer-generated hologram of asymmetry fractional Fourier transform is presented.
提出了一种利用不对称分数傅里叶变换和双随机相位编码对图像加密的方法。
The paper presents encrpytion techniques of double random phase based on anamorphic fractional Fourier transform.
提出变形分数傅里叶变换双随机相位编码技术。
The phase of the test object can be extracted by Fourier transform.
物面的相位由傅里叶变换法求得。
Extracting spectral phase differences between two linear chirped pulse from the spectral interferogram is simulated based on Fourier Transform Spectral Interferometry.
在超快光学瞬态相移的测量中，结合线性啁啾脉冲与频谱干涉技术，可以获得啁啾脉冲相移随频谱的变化规律。
The phase error caused by leakage in a 3- D object measurement Fourier transform profilometry (FTP) method is discussed.
讨论了频谱泄漏对傅里叶变换轮廓术测量精度的影响。
Fourier transform-based registration technique, the phase correlation method, is introduced. It is applied to register polarization images.
介绍了一种基于傅立叶变换的配准方法：相位相关法，并把该方法应用于偏振图像配准中。
S-transform has muti-resolution overcoming single resolution of short-time Fourier transform. Otherwise, S-transform contains phase factor which wavelet transform has not.
变换具有多种分辩率，克服了短时窗傅立叶变换固定分辩率的不足：另外，S -变换中含有相位因子，这是小波变换所不具备的特性。
Analysis of Components of Synthetic 1, 1, 1, 2-tetrafluoroethane and Its Related By-Products From Vapor Phase Catalytic Fluorination by Gas Chromatography-Fourier Transform Infrared Spectroscopy.
气相催化氟化合成的1,1,1,2 -四氟乙烷及其相关副产物组分的气相色谱-红外光谱分析。
Analysis of Components of Synthetic 1, 1, 1, 2-tetrafluoroethane and Its Related By-Products From Vapor Phase Catalytic Fluorination by Gas Chromatography-Fourier Transform Infrared Spectroscopy.
气相催化氟化合成的1,1,1,2 -四氟乙烷及其相关副产物组分的气相色谱-红外光谱分析。
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