This paper studies the FFT analysis and the synthesis method of the symmetric coupler curves in mechanism.
本文对机构学中对称连杆曲线的FFT分析和综合方法进行了研究。
It is proved that long sequence FFT analysis can suppress noise therefore improve SNR, which is equivalent to time accumulation.
从数学上证明了长序列fft分析可实现噪声抑制，从而提高信噪比，其实质相当于时间积累。
With the FFT analysis it is analyzed that the pressure surge changing laws in the taper pipe and draft tube in time domain and frequency domain.
通过水压力脉动数据的FFT频谱分析，研究了直锥段和尾水管内部在不同位置不同工况下的压力脉动在时域及频域上的变化规律。
Through wavelet analysis and FFT analysis to the collected structure vibration signal, the vibration wave curves and analysis results of different frequencies are acquired.
通过对采集的振动信号进行小波多分辨率分析和FFT谱分析，得出被测结构振动响应包含的各频率对应的振动波形曲线。
The dynamic vibration information is gained from acceleration meter, and then by FFT analysis, the frequency information of vibration is used as the training specimen of neural network.
首先利用测振传感器获得转子的振动信息，然后用FFT分析，将振动信号的频谱分析作为神经网络的训练样本。
Compared with the original two kinds of Phase-Difference Correction, only one sequence of time-domain signal is sampled and FFT analysis of same points is performed twice in this method.
与原两种相位差法相比，这种方法只采一段时域信号，且进行两次相同点数的FFT分析。
Some problems concerning signal processing by micro-computer using the traditional method (the FFT analysis) and modern method (the time series analysis) are investigated. Experimental results ar…
文中还论述了采用传统方法（FFT分析）与现代方法（时间序列分析）在微型机上实现信号处理时的有关问题。
The second chapter recommends spectrum analysis with FFT.
第二章介绍了用FFT来进行谱分析；
This paper discusses the parallel FFT algorithm on the hypercube architecture. Based on the analysis of the communication complexity, the speedup of the algorithm is derived.
本文讨论超立方体结构上的并行fft算法，着重分析算法的通信复杂性，并在此基础上导出算法的加速比。
Fast Fourier transform (FFT) is the main algorithm for harmonic analysis in electric power system, but when there is the decaying DC component in input signal, FFT algorithm will have higher error.
快速傅里叶变换(FFT)是电力系统进行谐波分析的主要算法，但当输入信号中含有衰减直流分量时，FFT算法会产生较大的误差。
Basic theory of spectrum analysis and Fast Fourier Transform (FFT) algorithm are briefly introduced.
简介了频谱分析的基础理论和快速傅利叶变换(FFT)算法。
The current widely used methods of seismic response analysis for soil layers in engineering are equivalent linearization frequency domain method which is based on FFT and iterative method.
工程上广泛应用的现行土层地震反应分析方法即为借助快速傅里叶变换和迭代法的等效线性化频域方法。
In order to realize a noise octave analysis by software, a digit weight method based on FFT is proposed.
为了利用软件实现噪声倍频程分析，提出了一种基于FFT的数字计权方法。
The standard method for spectrum analysis in digital signal processing is the discrete Fourier transform(DFT), typically implemented using a fast Fourier transform(FFT) algorithm.
数字信号处理中标准的频谱分析方法是离散傅立叶变换（DFT），典型的实现方法是快速傅立叶变换（FFT）。
This paper discusses issues of finite word-length effects in the block floating-point radix-8 FFT processor and presents a novel static model based on statistical analysis.
研究了基于基8算法的块浮点FFT处理器的有限字长效应问题，提出了一种基于理论统计分析的静态模型。
Non integer period Sampling leads to large error in harmonic analysis by FFT.
利用FFT变换进行谐波分析，非整周期采样会带来较大的误差。
The method is compared to the traditional FFT(Fast Fourier Transformation)analysis. The feasibility of analyzing the engineering measure data using wavelet transformation is discussed in this paper.
并将该方法与传统快速傅立叶变换分析结果进行比较，探讨了使用小波变换对工程实测数据进行分析的可行性。
Based on the analysis of the complexity and hardware architecture of FFT, the proposed processor adopts radix-4 DIF algorithm, pipelined architecture and fixed-point operation.
在分析了FFT算法的复杂度和硬件实现结构的基础上，处理器采用了按频率抽取的基- 4算法，分级流水线以及定点运算结构。
Here, secondary treatment methods are introduced in detail, include time domain signal statistics character, frequency analysis fast Fourier transform (FFT), and short time Fourier transform (STFT).
这里，主要对二次处理的方法作了详细的介绍，包括时域信号的统计特征，频域分析的傅立叶变换和短时傅立叶变换。
Fudan University In this paper a 8031 single-chip system for FFT is described. Some results of real-time display and analysis of ultrasound Doppler flow sonography using this system are also given.
本文介绍一种实现傅立叶快速变换的8031单片系统，并给出该系统实时显示和分析超声多普勒血流信号声谱的一些结果。
Discrete fast Fourier transform (FFT) has been widely applied to signal spectral analysis and can figure out the entire bandwidth spectrum of a signal.
离散快速傅里叶变换算法在频谱分析中得到了广泛的应用，这种算法得到的计算结果是在整个频段上的频谱信息。
It Contains system construction, measurement environment requirement, FFT application in microcomputer, and spectrum analysis for vibrations in practical engineering.
系统的构成、对测试环境的要求、FFT在微型计算机上的实现，以及在实际工程中振动频谱分析的应用。
Two methods, code density histogram and spectrum analysis FFT, are introduced, which are typically used to test dynamic parameters of ADC′s.
着重介绍了码密度直方图法和谱分析FFT法两种常用的ADC动态参数测试方法，指出了该领域未来的研究方向。
Harmonic analysis usually adopts FFT algorithm, the 280 Sample points need interpolation management, which make FFT faster.
谐波分析通常采用FFT算法，为了加快FFT的运算速度，需要对280个采样点进行插值处理。
Finally, a simulation analysis for the improved FFT frequency correction technology and phase-lock loop is maked, the result shows that the method also has a good performance in the low SNR situation.
最后分别对改进的FFT校频技术及锁相环进行了仿真分析，结果表明该方法在低信噪比下仍具有良好的性能。
Finaly tested thrust data processing, data smooth, FFT frequency analysis and compensated filter were accomplished.
最后对实测推力数据进行分析处理，即数据平滑、FFT频域分析和补偿滤波。
Using harmonic analysis, the roundness error is analysed. A handy analytical method of roundness error is presented. Then the application of FFT is discussed.
本文应用谐波分析法分析了圆度误差，提出了一种圆度误差的简便分析方法，最后讨论了快速富里叶变换的应用。
When we use FFT to analysis harmonics and interharmonics, the interharmonics component will result in a phenomenon of frequency spectrum leakage.
在运用FFT分析谐波和间谐波时，FFT算法存在频谱泄露的现象。
By valuing six American put options, the numerical experiment and analysis show that the Euler method with FFT is a fast and highly accurate numerical method.
在数值实验中，对六个美式看跌期权价格进行了计算，通过分析比较，结果表明：快速傅里叶变换法加欧拉法是一种快速的高精度的数值计算方法。
So, the windows and interpolated FFT is developed, and the harmonic expurgation according to amplitude is put forward for high order harmonic parameters analysis in this paper.
作者采用加窗插值FFT，并提出逐幅谐波消去法，以便能精确地分析高次谐波。
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