其次，使用由FFT快速傅立叶分析仪、激光传感器等组成的检测系统，进行了激光传感器对木材表面粗糙度定量测量方法的研究和木材表面缺陷识别的研究。
Secondly, laser sensor quantitative measure wood surface roughness method and wood surface defect recognition are studied by the test system consisting of FFT analyzer, laser sensor etc.
应用快速傅立叶变换方法对脉搏信号进行了分析。
The pulse signals were processed by using the fast Fourier transforms.
你可能会问，我们为什么不像傅立叶变换用无限长的窗口一样，而在快速傅立叶变换中却用有限长的窗口进行分析呢？
You may ask, why don't we make the length of the window in the STFT infinite, just like as it is in the FT, to get perfect frequency resolution?
介绍了通过基于快速傅立叶变换（FFT）的谱分析确定综框的动态特性。
The method of impact excitation testing with Fast Fourier Transform (FFT) based on spectrum analyzer to determine the dynamic characteristics of a heald frame is introduced.
采用快速傅立叶变换(FFT)进行电力系统谐波分析时，需要对采样信号截断并离散化，从而导致频谱泄漏和栅栏效应。
Fast Fourier Transform (FFT) is inevitable to cause the spectrum leakage and fence effect because of truncation and discreteness in signal collection.
本试验应用傅立叶变换近红外光谱透射技术快速定量分析甘蔗蔗汁蔗糖分。
The sucrose content in sugarcane juice was rapidly determined by quantitative analysis of near infrared spectroscopy(NIRS) with transmission measurement.
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。
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.
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）。
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.
利用二维快速傅立叶变换的时频分析方法，对有限元计算得到的时域信号进行了分离，得到了各个模式超声波的相速度色散曲线。
The two-dimensional fast Fourier transform (2D-FFT) method has been used to analyze the ultrasonic signals where different wave modes overlaid in the time domain.
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。
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.
傅立叶变换红外光谱是快速无创分析物质分子结构的有效手段。
Fourier Transform Infrared (FTIR) spectrum is an effective method for investigating substance molecular structure swiftly while keeping the specimens intact.
另外，快速傅立叶变换仅适用于分析平稳渐变的信号，不能适应负荷动态变化的电力谐波检测。
In addition, FFT is applicable to analyze gradually-changed signals instead of detecting harmonics when the load breaks.
目前，应用最广泛的故障信号分析处理方法是傅立叶(Fourier)分析和相应的FFT快速算法。
At present, the most widely used fault signal analysis and processing method is Fourier analysis and Fourier corresponding FFT fast algorithm.
用快速傅立叶变换相位探测技术(FFT)分析自混合干涉信号。
FFT phase detection technique was applied to analyze SMI signal.
并利用快速傅立叶变换方法对谐波、闪变和纯正弦波等稳态现象进行分析。
As to steady state phenomena, the traditional signal analysis tool FFT is used for harmonic analysis and flicker.
方法采用傅立叶红外光谱仪对近似静电复印纸进行了快速检验，同时分析了新方法的技术特点。
Method Similar photocopy paper samples were analyzed by using FT-IR. The characters of the method were studied.
在分析傅立叶变换特性的基础上，利用傅立叶变换核的三阶对称性，给出了一种快速傅立叶变换算法。
After analysing the character of Fourier transform, using 3 level symmetry of Fourier Kernel as a new algorithm for fast Fourier transform was proposed.
在分析傅立叶变换特性的基础上，利用傅立叶变换核的三阶对称性，给出了一种快速傅立叶变换算法。
After analysing the character of Fourier transform, using 3 level symmetry of Fourier Kernel as a new algorithm for fast Fourier transform was proposed.
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