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fft快速傅立叶变换
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  “fft(快速傅立叶变换)”译为未确定词的双语例句
     The dynamic strain induced wavelengthshift in phaseshifted fiber Bragg grating is investigated by use of unbalanced MachZehnder interferometer and a strain resolution of 2.1×10-2με(where 1με is a strain of 1 part in 106) at 2.1kHz (5kHz bandwidth) is achieved. 
     用非平衡Mach-Zehnder干涉仪检测动态应变在相移光纤光栅中感生的波长变化,对2.1kHz信号进行FFT(快速傅立叶变换)频谱分析得到了2.1×10-2με(1με=1×10-6应变)的应变分辨率(信号分析带宽5kHz)。
短句来源
     This method is using Morlet wavelet transform,phase compensating, filtering ,extracting the modulation spectrum of radar target by FFT, then radar target is detected.
     此方法是利用小波变换 ,得到雷达目标回波信号的频率调频指数 ,对信号进行相位补偿 ,然后滤掉信号中的机身频谱和多普勒频谱 ,再进行相位补偿 ,用 FFT(快速傅立叶变换 )就可以得到目标的调制谱 ,由此实现目标识别。
短句来源
     This article presents a method of implementation 1024-point FFT used verilog language.
     本文介绍了利用Verilog进行1024点FFT(快速傅立叶变换)实现的方案。
     DFT(Discrete Fourier Transform) is the most important fundamental operations and plays a core role in all sorts of digital signal processing. FFT(Fast Fourier Transform) algorithm has achieved a dramatic increase in the efficiency of computation of the DFT, which is widely used in the domains of wireless communication, speech recognition, image processing, and spectrum analysis.
     DFT(离散傅立叶变换)作为将信号从时域转换到频域的基本运算,在各种数字信号处理中起着核心作用,其快速算法FFT(快速傅立叶变换)在无线通信、语音识别、图像处理和频谱分析等领域有着广泛的应用。
短句来源
     The FFT (Fast Fourier Transform) technique is applied to process the image of knitted fabrics to get the frequency of needle loops in order to measure the density.
     采用FFT(快速傅立叶变换 )对针织物进行图像处理 ,并利用提取的针织线圈的空间频率信息来测量针织物的密度。
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  相似匹配句对
     Accomplishment of Fast Fourier Transform in TMS320F206
     快速傅立叶变换(FFT)在TMS320F206上的实现
短句来源
     One is the fast Fourier transform (FFT) accelerated algorithm.
     一种是快速傅立叶变换(FFT)加速算法。
短句来源
     The Fast W Transform
     快速W变换
短句来源
     FFT Processor Design Based on FPGA
     基于FPGA的快速傅立叶变换(FFT)处理器的设计
短句来源
     Outline of Fast Fourier Transform Algorithm
     快速傅立叶变换算法概述
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  fast fourier transform (fft)
Spherical harmonic series have many of the same wonderful properties as Fourier series, but have lacked one important thing: a numerically stable fast transform analogous to the Fast Fourier Transform (FFT).
      
Moreover, the approach is more computationally efficient for there are no time-consuming correlations or fast Fourier transform (FFT) operations needed in the range-Doppler domain and only part of the range cells are used in the calculation.
      
This study investigated the dynamic modulus of elasticity (DMOE) of wood panels of Fraxinus mandshurica, Pinus koraiensis, and Juglans mandshurica using the natural frequency measurement system of fast Fourier transform (FFT).
      
This makes it possible to study them by means of analysis of multiplicative phenomena using the Fast Fourier Transform (FFT).
      
Impedance matrix elements are computed by using fast Fourier transform(FFT), and reduced equation is solved by using diakoptic technique.
      
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  fast fourier transformation (fft)
Cardiac BRS was measured by power spectral analysis using Fast Fourier Transformation (FFT), sequence analysis (using up, down and combined sequences) and from phase IV of the Valsalva manoeuvre.
      
The mathematical treatment is based on the Galerkin's method in the spectral domain and the fast Fourier transformation (FFT).
      
This paper also tries to overcome difficulties of using Fast Fourier Transformation (FFT) techniques to the geoid computation when the Hotine kernel is modified according to the truncation theory.
      
The parallel digitally recorded snoring sounds were analysed by fast fourier transformation (FFT).
      
For EEG fast Fourier transformation (FFT) was used for mapping.
      
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The main problem in on line partial discharge monitoring is how to reject the interference. At the present, the main focus is placed on the qualitative analysis of interference. In this paper, several digital filters are used to analyze the field interference both in quality and quantity, including LMS (Least Mean Square) Adaptive Digital Filter, FFT (Fast Fourier Transformation) Threshold Digital Filter. The study is also made on these digital filters and some deficiencies related to these methods are pointed...

The main problem in on line partial discharge monitoring is how to reject the interference. At the present, the main focus is placed on the qualitative analysis of interference. In this paper, several digital filters are used to analyze the field interference both in quality and quantity, including LMS (Least Mean Square) Adaptive Digital Filter, FFT (Fast Fourier Transformation) Threshold Digital Filter. The study is also made on these digital filters and some deficiencies related to these methods are pointed out. Also in this paper, a new Ideal Multi bandpass Digital Filter based on FFT is used to process the data sampled in field tests, which has the advantages of simple operation, high rejection ratio and clear meaning and is regarded as a good method for rejecting the continuous periodic interference. As to pulse interference, a method of pulse identification is raised based on the logical judgement of the features of pulses and a good result is got.

局部放电在线监测的关键是如何有效简便地抑制各种干扰,但目前对现场干扰的研究多限于定性分析。本文利用数字滤波方法对现场干扰作了定性分析和定量研究,对目前研究较多的LMS(最小均方误差)自适应滤波、FFT(快速傅立叶变换)阈值滤波的效果作了对比分析,指出它们在实际应用中尚存在不足,并且提出了一种基于FFT的理想多带通数字滤波器。应用于现场的数据处理,该方法具有处理简单、抑制比高、意义明确等优点,是抑制连续周期性干扰的较好措施。对于脉冲干扰,提出了一种新的利用脉冲信号波形特征进行逻辑判断的脉冲识别方法,取得了较好的效果。

In this paper,the technique of modulation/demodulation in ADSL(asymmetric digital subscriber line) systems is described,and a method to implement FFT(fast Fourier transform) with EPLD(erasable programmable logic device)is proposed.

阐述了ADSL(非对称数字用户线)的调制/解调技术,并给出一种用可擦可编程逻辑器件来实现其中FFT(快速傅立叶变换)的具体方案。

This paper introduces how to use LabVIEW(A workbench produced by National Instruments Company) to process nearly real-time the data acquired by OPDs (Optical path length difference) optical fibre sensor using a white light source and a CCD (charge-coupled device) based monochromator for strain gauged.This method can in substance realize real-time measurement the strain of a structure in spectral analysis by using Spline Interpolant and Fry, Finally we should give a program writed by LabVIEW to show the result....

This paper introduces how to use LabVIEW(A workbench produced by National Instruments Company) to process nearly real-time the data acquired by OPDs (Optical path length difference) optical fibre sensor using a white light source and a CCD (charge-coupled device) based monochromator for strain gauged.This method can in substance realize real-time measurement the strain of a structure in spectral analysis by using Spline Interpolant and Fry, Finally we should give a program writed by LabVIEW to show the result.

介绍了如何利用美国NI公司的LabVIEW软件开发实时处理应变光纤传感器测量的数据。这种方法可以通过内插和FFT(快速傅立叶变换)基本上实现对应变的实时测量,文章最后给出了一个利用InbVIEW进行处理的程序。

 
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