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进行快速傅立叶变换
相关语句
  carrying out fourier transformation
     Firstly, using quadric-polishing function to eliminate bad points and carrying out Fourier transformation so as to determine the frequency components of signal, and set up signal amplitude of each frequency component and value adoption range of preliminary phase, and then taking the difference between actually measured signal and result of identification to define the fitness, finally, the optimal solution is obtained through basic genetic operation and iteration.
     首先采用二次磨光法消除坏点并进行快速傅立叶变换以确定信号的频率成分 ,并设定各频率成分信号的幅值和初相位的取值范围 ,然后以实测信号与识别结果的差值定义适应度 ,最后经过基本遗传操作和迭代得出最优解。
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  “进行快速傅立叶变换”译为未确定词的双语例句
     Make use of the digital signal processor chip of the TMS320 VC5416 of TI company to carry on fast leaf s transformation to sign leaf s transformation to the piano news number for collecting immediately after, analyze piano news the frequency chart of the number composing;
     接着利用TI公司的TMS320VC5416数字信号处理器芯片对采集的琴音信号进行快速傅立叶变换,分析出琴音信号的频谱构成;
短句来源
     Through of current with FFT function from MATLAB, fundamental and harmonic current injected in to the catenary by the electriclocomotive is deducted.
     利用MATLAB提供的FFT函数对电流进行快速傅立叶变换,得到电力机车注入牵引网的基波和各次谐波电流。
短句来源
     It has realized the functions that make FFT on antenna temperature and output the emulation data to the appointed port.
     T A(θF)随时间变化的曲线,实现了对天线温度对比度进行快速傅立叶变换,将仿真数据以多种形式向指定端口输出等功能。
短句来源
     We measured the OTF of a photographic lens by digital Fourier Transform,using a CCD to scan the slit image in the focal plane of the collimator in front of the measured lens.
     我们利用 CCD 扫描位于被测照相物镜前面的平行光管焦平面上的狭缝像,采样数据通过 A/D 变换后输入计算机,把这些数据进行快速傅立叶变换即可求出被测照相物镜的 OTF 值;
短句来源
     The frequency-amplitude characteristic curves were gained from the attitude angle velocity curves of the deployment of the flexible truss and locked flexible truss after deployment through the Fast Fourier Transition (FFT) method.
     对柔性桁架展开过程中及展开锁定后的卫星姿态角速度的变化曲线进行快速傅立叶变换,得到柔性桁架展开过程即展开锁定后卫星姿态角速度的频幅特性曲线。
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  相似匹配句对
     The Fast W Transform
     快速W变换
短句来源
     A Fast Fourier Transformation Micromagnetism Method
     快速傅立叶变换微磁学方法
短句来源
     Implementation of FFT in FPGA Technology
     基于FPGA的快速傅立叶变换
短句来源
     The comparison of the algorithm of fast Fourier transform
     快速傅立叶变换算法的比较
短句来源
     An Outline of the Fast Fourier Transform Algorithm
     快速傅立叶变换算法概述
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We measured the OTF of a photographic lens by digital Fourier Transform,using a CCD to scan the slit image in the focal plane of the collimator in front of the measured lens.The Fourier Transform of the sampled data of the image,after input into the computer through a A/D converter,gave the OTF value. We measured the SQF of the lens using CCD to sample the logarithmic grating image fozmed by the measured lens and obta- ined the SQF from the integration of the system OTF expressed in polar coordinate and logrithmic...

We measured the OTF of a photographic lens by digital Fourier Transform,using a CCD to scan the slit image in the focal plane of the collimator in front of the measured lens.The Fourier Transform of the sampled data of the image,after input into the computer through a A/D converter,gave the OTF value. We measured the SQF of the lens using CCD to sample the logarithmic grating image fozmed by the measured lens and obta- ined the SQF from the integration of the system OTF expressed in polar coordinate and logrithmic frequency coordinate.

我们利用 CCD 扫描位于被测照相物镜前面的平行光管焦平面上的狭缝像,采样数据通过 A/D 变换后输入计算机,把这些数据进行快速傅立叶变换即可求出被测照相物镜的 OTF 值;同样我们用 CCD 采样对数光栅目标物通过被测照相物镜后处于平行光管焦面上的像,由于被测照相物镜的 SQF 可以表示为极坐标形式下系统 OTF 关于对数空间频率的积分,它由采样得到的目标光栅像各个峰值归一后与各自相邻对数频率间隔的乘积累加得出。

Phase shifting interference measurement is a precision test method in optics. Phase shifter is an important part and affects directly test precision. In this paper,a calibration phase shifter method is introduced.The function of phase shifting interferograms is sampled successively and transformed by fast Fourier transform.Afterward,the phase shift amount of every two adjacent fringes is obtained,and the phase shift amounts of PZT are decided. This method is simple,rapid,and easy to realize real...

Phase shifting interference measurement is a precision test method in optics. Phase shifter is an important part and affects directly test precision. In this paper,a calibration phase shifter method is introduced.The function of phase shifting interferograms is sampled successively and transformed by fast Fourier transform.Afterward,the phase shift amount of every two adjacent fringes is obtained,and the phase shift amounts of PZT are decided. This method is simple,rapid,and easy to realize real time calibration. Also,the calibration(0.005μm) can satisfy the demand of the phase shifting interference measurement.

相移干涉测量是一种光学精密检测方法.相移器作为其中关键部件,它的性能直接影响计量精度.文中介绍了一种用于相移器标定的方法.该方法采用对连续采集的相移干涉图光强分布函数进行快速傅立叶变换,得到相邻两次位移差,即相移大小,以此来决定压电陶瓷的移动量.此方法标定精度(0.005μm)满足了相移干涉测量的要求,操作简单、计算速度快,且易于实现实时标定处理.

It describes an antenna measurement system based on short duration pulse technology. The source antenna transmitting a series of short duration pulse. The antenna did not need test receive this pulse and then make a FFT (Fast Fourier Transform) compute, obtain the radiation pattern at every frequency. At same time, a time window technology is used in this system, it can eliminate echo signal and other jamming signal, so this system doesn't need microwave anechoic rooms, and the test is very efficient and...

It describes an antenna measurement system based on short duration pulse technology. The source antenna transmitting a series of short duration pulse. The antenna did not need test receive this pulse and then make a FFT (Fast Fourier Transform) compute, obtain the radiation pattern at every frequency. At same time, a time window technology is used in this system, it can eliminate echo signal and other jamming signal, so this system doesn't need microwave anechoic rooms, and the test is very efficient and very accurate.

介绍一种利用窄脉冲技术对天线电性能进行测试的设备。该设备不需要传统测试中的信号源发射连续波信号 ,其发射和接收的均是窄脉冲信号 ,然后将接收到的窄脉冲信号进行快速傅立叶变换计算出各频率上的幅度相位信息 ,因而在天线方向图测量时快速高效 ,而且可以利用时窗技术选取测试主信号 ,消除多路反射、杂波干扰等信号 ,故不需要微波暗室也能实现对天线的精确测量

 
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