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1)  Fast Fourier transformation of flow curve
快速傅立叶转换图形
2)  FFT
快速傅立叶变换
1.
Roll eccentricity compensation control based on FFT;
基于快速傅立叶变换的轧辊偏心补偿控制
2.
The Implementation of Fast Fourier Transform (FFT) in DSP;
快速傅立叶变换(FFT)在数字信号处理器(DSP)上的实现
3.
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
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3)  fast Fourier transform
快速傅立叶变换
1.
Two different dot superimposition images processed by fast Fourier transform ( FFT) are compared and analyzed particularity.
通过对线条形网点图像的实际打样与“欧几里得”网点打样样张的比较,重点阐述了线条形网点在印刷复制过程中的网点频率传递特性,在论述中,笔者对采用快速傅立叶变换后获得的网点叠印图像的频谱进行了较为细致地分析,得出影响人眼观察印刷图像的主要频率值及其原因。
2.
For the research on Milankovitch cycle of the Permian Changxing formation in northeastern Sichuan basin,the frequency spectrum of logging curves was analyzed with fast Fourier transform function offered by Matlab language.
为了研究川东北地区上二叠统长兴组中的米兰科维奇周期,采用Matlab提供的快速傅立叶变换数学函数,对该区测井曲线的频谱进行了分析。
3.
Theory and character of Fast Fourier Transform or Moment Invariants were studied and algorithm of image feature extraction based on FFT and moment invariants was put forward and applied to classification of surface defects of medium and heavy plates.
研究了快速傅立叶变换、不变矩的原理及特点,并应用于热轧中厚板表面缺陷图像特征提取。
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4)  Fast Fourier Transform(FFT)
快速傅立叶变换
1.
The arithmetic operation load is about half of that in the Fast Fourier Transform(FFT) algorithm.
利用快速Hartley变换算法求解鳞状因子循环实线性方程组,该算法比快速傅立叶变换(FFT)减少近一半的计算量。
2.
A new method has high precision and efficiency to solve the structural dynamic equation is obtained by combining the numerical particular solution of nonhomogeneous equation solved by fast Fourier transform(FFT) with the gene.
离散结构动力方程为差分方程,并假设始、末时刻位移已知,将初值问题形式上转化为边值问题,然后利用快速傅立叶变换(FFT)进行求解,从而得到非齐次结构动力方程的一个数值特解。
3.
The rubbing was identified by processing vibration signals using fast Fourier transform(FFT),understanding color maps by point of energy,and also combining time-domain charts,frequency charts and waterfall maps.
该方法以快速傅立叶变换法处理测振信号,以能量的观点理解振动色谱图,并结合时域图、频谱图和瀑布图对转子是否存在碰磨做出判断。
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5)  fast Fourier transformation
快速傅立叶变换
1.
A study was performed on the PIV algorithm based on fast Fourier transformation(FFT),and the PIV program was compiled and verified.
在粒子图像测速原理的基础上研究了基于快速傅立叶变换的粒子图像测速算法,并编制算法程序进行验证。
2.
A leakage point positioning systerm is developed,which is based on correlation analysis of fast Fourier transformation for locationing the leakage in the pipe.
针对管道漏点定位问题,研制出了一套基于快速傅立叶变换的相关分析法管道泄漏点定位系统。
3.
A calculation method based on fast Fourier transformation and micromagnetism(FFTM) is presented.
提出了一种具有快速傅立叶变换的微磁学(FFTM)方法,并应用于二维纳米磁性系统。
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6)  fast Fourier transform (FFT)
快速傅立叶变换
1.
To meet the requirement of high data processing rate in broad band orthogonal frequency division multiplexing (OFDM) system, an implementation method of 64 points fixed-point high rate fast Fourier transform (FFT) processor in field programmable gate array (FPGA) was discussed.
针对宽带正交频分复用(OFDM)系统中高速数据处理的要求,提出了 64 点高速定点快速傅立叶变换(FFT)处理器在现场可编程门阵列(FPGA)中的设计与实现方法。
2.
Fast Fourier Transform (FFT) is one of the basic operations in digital signal processing (DSP), which has been widely applied in communication,medical electronics,radar and radio astronomy.
快速傅立叶变换(FFT)属于数字信号处理中最基础的运算,已广泛应用于通讯、医学电子学、雷达和射电天文学等领域。
3.
The Fast Fourier Transform (FFT) is the most important techniques to estimate the parameters of a periodic component;however its sensitivity to random noise does not draw much attention in the vibration community.
快速傅立叶变换(FFT)是估计周期成分的最重要方法,但是它对随机噪声的敏感性在振动领域很少受到关注,这是因为FFT的栅栏效应和谱泄漏引起的误差淹没了随机噪声的影响。
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补充资料：傅立叶转换


傅立叶转换


　　数学定理。由数学家傅立叶(Fourior)提出的一个数学定理，它可把重要的物理量相互联系起来。如：把时间函数变换成频率函数，或把频率函数变换为时间函数。在数字成像领域内，广泛应用傅立叶转换的方式进行各物理学变量的转换，以行图像或波谱的重建。
　　
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条