the ccd matrix camera as square law detection records joint transform power spectrum in spectrum space. through optical fourier transform, we can gain correlation signal;

1、

the analysis of the phase-shift error of the pmp phase-shift device using fft method

利用快速傅立叶变换分析PMP相移机构的相移误差

互联网摘选

2、

discrete fourier transform ( dft) is one of the most popular methods applied in computer-based measurement of harmonics signals.

通过离散傅立叶变换（DFT）对电网谐波信号进行分析是常用的方法。

互联网摘选

3、

fourier transform infrared ( ft-ir) spectra showed that hydroxyl group was coated on the surface of nanocrystal successfully.

傅立叶变换红外谱图（FT-IR）显示了羟基基团成功地包覆在纳米晶的表面。

互联网摘选

4、

fourier transform infrared spectroscopy ( ft ir) was used for studying conformational and crystal change in plasticized poly ( vinyl chloride)( pvc).

傅立叶变换红外光谱法用于探测增塑聚氯乙烯（PVC）的构象和结晶的变化。

互联网摘选

5、

fast fourier transform is a necessary precondition of digital spectral analysis as the basic computing between the time domain and frequency domain.

快速傅立叶变换（FFT）作为时域和频域转换的基本运算，是数字谱分析的必要前提。

互联网摘选

6、

next we derive the principle of high range resolution profile in view of ifft in detail, which is simulated by ads& matlab.

详细推导了基于逆傅立叶变换的高分辨距离成像原理，并且通过ADS和MATLAB进行了联合仿真。

互联网摘选

7、

giving an example of fft through transferring matlab library function, the code length becomes 7 from 78, thus shortening the exploitation period of application.

结果表明，以图像的傅立叶变换为例，通过调用Matlab库函数，代码长度由78行变为7行，极大缩短了应用程序的开发周期。

互联网摘选

8、

the development of fast fourier transformation ( fft) algorithm made it possible in digital processing of spectrum analysis.

快速傅立叶变换（FFT）算法的出现为频谱分析的数字化处理提供了理论基础。

互联网摘选

9、

the short-time fourier transform of the original audio signal is used to estimate a weighted imf of the signal.

本文算法对原始的音频信号进行短时傅立叶变换，从而估计出信号的加权瞬时平均频率（IMF）。

互联网摘选

10、

compared to the classical fourier transform, advantage of emd is non-stationary signal analysis.

和经典的傅立叶变换相比较，EMD在非平稳信号分析方面具有独特的优势。

互联网摘选

11、

a mathematical prediction model of calcium in tobacco with ft-nir spectrometry was established.

采用傅立叶变换近红外（NIR）光谱法建立了烟草中钙含量的NIR数学预测模型。

互联网摘选

12、

fast fourier transforms, sliding percentage windows, and some linux audio programming can give you tonal-recognition capabilities with your language of choice.

快速傅立叶变换、滑动窗口和某些Linux音频编程可以为您提供符合您所选语言的音调识别能力。

互联网摘选

13、

fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy were used to illustrate the composition changes of plga.

使用傅立叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS），证明了肝素化后的材料表面化学成分的变化。

互联网摘选

14、

the chemical structure of pu microcapsule was researched by ir ( infrared spectrum).

由傅立叶变换红外光谱（FT-IR）研究了PU微胶囊的化学结构；

互联网摘选

15、

a method for improving the speed of fast fourier transformation ( fft) algorithm is presented.

提出了一种快速傅立叶变换（FFT）运算的快速实现方法。

互联网摘选

16、

applied for fourier transform on time domain rcs measurements

傅立叶变换在RCS时域测试上的应用

互联网摘选

17、

high efficient fft ( i fft) algorithm is a key technology in ofdm system.

高效率的快速傅立叶变换（FFT）的算法是正交频分复用（OFDM）系统中的一项核心技术。

互联网摘选

18、

estimating the parameters of chirp signals using discrete chirp-fourier transform schemes

利用离散Chirp傅立叶变换技术估计调频信号参数

互联网摘选

19、

symmetry frft used to suppress the fixed background clutter to detect moving target in a sar image

分数傅立叶变换用于抑制SAR杂波背景检测慢速动目标

互联网摘选

20、

algorithm of fourier-transform in 2-dimension image reconstruction with matlab

利用MATLAB实现二维图像傅立叶变换算法

互联网摘选