fast fourier transform (fft)造句
例句与造句
- In addition , the emphasis of the thesis is the use of fast fourier transform ( fft ) in reactive power compensation
研究的另一个重点是快速傅立叶变换在无功补偿中的应用。 - In addition , based on fast fourier transform ( fft ) , an effective and reliable carrier frequency detection method has also been designed in this thesis
此外，论文还设计了一种有效可靠的基于fft的载波频率测量方法。 - The concepts of filtering and sampling power system voltage and current signals for harmonic analysis using the fast fourier transform ( fft ) algorithm by a digital signal processor are introduced
软件算法方面，系统采用传统的快速付立叶变换( fft ) ，对采集的电压和电流信号进行频谱分析。 - But the computing amount of dft is so large that its practical use is restricted , especially real - time processing . in fact , we use fast fourier transform ( fft ) in practical engineering
但庞大的运算量使得dft的实际应用，特别是实时处理难以实现，所以实际工程中用到的都是快速傅里叶变换( fft ) 。 - Related techniques and their applications are briefly reviewed in this paper , the conventional cross - correlation algorithm and the cross - correlation algorithm based on fast fourier transform ( fft ) are discussed
本文简要地回顾了piv技术的一些典型算法和应用，研究了基本互相关算法和基于快速傅立叶变换的互相关算法。 - It's difficult to find fast fourier transform (fft) in a sentence. 用fast fourier transform (fft)造句挺难的
- In chapter 3 , the paper presents the theory of wigner - ville distribution ( wvd ) , pseudo wvd , smoothed pseudo wvd , discrete fourier transform ( dft ) , fast fourier transforms ( fft ) , and also expatiates on the
第三章将对wvd 、 pwvd 、 spwvd分布、 dft和fft变换的理论进行说明,并阐述跳频解跳与数字中频接收机的解跳原理。 - Three methods of digital signal processing algorithm are proposed to restrain the noise discussed , there are methods of fast fourier transform ( fft ) , of moving self - correlation , and of least means
这样,就可以在周期性和相关性上,区分这两类信号,并消除干扰。在此基础上,在数字信号处理方面,本文提出了三种算法用于抑制上述干扰。 - This paper introduced the work principle for testing wood elastic modulus with fast fourier transform ( fft ) and the structures of the machine and test technical process , this machine can test fast and accurate
摘要介绍了快速傅立叶变换( fft )技术敲击板材检测弹性模量数控检测设备的工作原理及组成，并在此基础上描述了检测板材的工艺过程，说明该检测设备具有准确快速等特点。 - The time - domain scattering is computed via fdtd method , which is particularly well adapted to frequency - dependent soil . this method is processed prior to a fast fourier transform ( fft ) , which is performed to come back to the frequency domain
主要包括用于有耗土壤和树干计算的频率相关fdtd算法- ( fd ) ~ 2td ，以及吸收土壤凋落波的gpml吸收边界，确立了树干散射的时域算法模型。 - The subregion with pure dielectric layers is analyzed by mol and the fast fourier transform ( fft ) is introduced to reduce the computing time , while the subregion with conductors is analyzed by fdfd to take advantage fully the superiorities of these two methods
通过在纯介质区域使用直线法，导体所在区域使用有限差分法分别进行求解，充分发挥两种方法各自的优越性。由于在纯介质区域中使用了直线法求解，因此该算法具有计算时间与介质层厚度无关的突出优越性。 - Among the different imaging algorithms , the range - doppler fft ( r - d fft ) algorithm , based on range - doppler theory , in which the fast fourier transform ( fft ) is employed to reduce compute burden , is widely used in various imaging radar because it can be easily realized in real - time application
陆基成像雷达( gbr )作为isar成像技术的重要应用,其观测目标具有速度快,惯性大,运动相对平稳等特点,针对这些特点,本文对isar成像运动补偿方面作了较为深入的研究。 - So power systems harmonic analysis is a significant aspect of power systems research . power system harmonic analysis was realized usually with fast fourier transform ( fft ) , but the method exits spectrum leakage , and can not analyse all harmonic parameters exactly , such as frequency , amplitude and phase , in particular has big phase error
电力系统谐波分析通常都是通过快速傅立叶变换( fft )实现的，但是这种方法存在栅栏效应和频谱泄漏，使计算出的谐波参数即频率、幅值和相位不准，尤其是相位误差很大，无法满足准确的谐波测量要求。 - It deduces the interpolation formula of simultaneous sampling datum calculated by the asimultaneous sampling datum and uses fast fourier transform ( fft ) technology to calculate harmonic parameters . in the end , it gives harmonic errors " datum and curves by means of math model and computer simulation
在此基础上，导出了用非同步采样数据计算同步采样数据的插值公式，并根据复序列快速傅立叶变换（ fft ）原理对插值后的采样数据进行分析和计算，从而得到电网谐波参数。 - In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal , wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station , in which the signal is decomposed into different frequency band , and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source
摘要基于李家峡水电站双排机组振动的现场试验研究，并且针对传统频谱分析方法傅立叶变换( fft )对于非平稳信号已力不从心这一缺陷，利用小波分析方法在时域和频域上同时具有良好的局部化性质，通过对开停机这一典型非平稳过程信号进行小波及小波包分析，将其分解到不同频带内，获取微弱信息和提取优势频率，并对其作振源分析，得出开停机初始时刻因水流不稳均出现强烈的振动现象，且低频段信号能量最大，开停机过程水流脉动压力和尾水涡带摆动是引起定子基础振动的主要原因。 - At first , the thesis discusses the hardware implementing arithmetic of fast fourier transform ( fft ) and some correlative problems need to be solved . and according to the thesis " design demand and characteristic of large - scale programmable logic device ( pld ) , the thesis designs an implementing scheme of fft processing machine based on pld
首先，论文研究了快速傅立叶变换( fft )的硬件实现方法以及有限字长效应等问题，并根据论文的设计要求和大规模可编程逻辑器件的特点，设计了一个基于可编程逻辑器件的fft处理机实现方案。
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