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。
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.
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。
This paper presents computation of the signal's amplitude spectrum and phase spectrum the Fourier transform.
对核测井曲线进行付氏变换，其纵向分辨率可以从分析振幅谱斜率变化中获得。
Used Fourier transforming the nuclear logs, its vertical resolution can be achieved from analyzing the changes of amplitude spectrum slope.
这些结果可用于数值计算和模拟该系统失调时对输入复振幅的衍射和分数傅里叶变换。
The result can be used in numerical calculation and simulation of diffraction and fractional Fourier transform of input complex amplitude of misaligned single spherical refracting system.
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。
In the experiment the amplitude of Fourier transform of object is modified to reduce the intensity dynamic range, while phase information is preserved.
对该图形进行振幅型双随机相位加密变换，得到原信息的加密灰度图；
Later, using amplitude-based double-random-phase transform, the enciphered gray scale figure is formed .
通过对一个球形信号进行傅立叶正反变换，发现用相位谱恢复的图形轮廓比振幅谱恢复的图形轮廓清晰。
Taking the sphere signal as an example, it is found that the phase spectrum is clearer than the amplitude one in resuming input signal.
根据子波振幅谱估算最小相位子波已有多种方法，本文对用希尔伯特变换法、同态法、零相位子波法、松弛迭代法等估算的最小相位子波，进行了详细的分析。
Among the methods for estimating the minimum phase wavelet from its amplitude spectrum, methods of Hilbert-transform, of homomorphy, of zero-phase wavelet and of relaxation-iteration are analysed.
首先对人脸图像进行傅里叶变换，得到其具有位移不变特性的振幅谱表征。
First, face images are processed by a 2D Fourier transform that has some effective properties such as a linear transform, and is invariant against spatial translation.
首先对人脸图像进行傅里叶变换，得到其具有位移不变特性的振幅谱表征。
First, face images are processed by a 2D Fourier transform that has some effective properties such as a linear transform, and is invariant against spatial translation.
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