• 分析了IBD算法实现空域IBD利用傅立叶变换IBD相结合算法

    IBD algorithm is analyzed, and the space IBD method combined with the IBD method based on Fourier transformation is realized.

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  • 利用傅立叶变换红外光谱氰酸及其改性树脂体系进行固化反应动力学的研究。

    The kinetics of neat cyanate ester and its modified resin systems were investigated by FTIR.

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  • 利用傅立叶变换有限差分求解波动方程三维正演模拟重要方法之一

    The pseudo-spectrum method uses Fourier transform and finite difference to solve wave equation. It is one of the important methods used to simulate the seismic wave field.

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  • 分析傅立叶变换特性基础上,利用傅立叶变换对称性给出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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  • 利用傅立叶变换红外光谱胶原结构进行鉴定同时采用高效液相色谱对所提胶原蛋白进行氨基酸组成分析。

    The structure of collagen was identified with Fourier Spectrum, and the aminophenol of collagen was assayed with high performance liquid chromatography.

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  • 三种典型应力分别利用傅立叶变换变换进行了对比分析,得知它们频率分布以及能量分布规律

    Three typical stress waves induced by impact loads were analyzed by both Fast Fourier Transform (FFT) and Wavelet, and the distribution rules of frequency and energy of stress waves were obtained.

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  • 为了准确求解波面我们将其调制载频条纹上,利用傅立叶变换方法条纹图进行处理后,干涉图所代表的波面。

    To work out the wavefront accurately, we modulate it on a carrier frequency. The wavefront can be worked, using the Fourier Transform method on the interferogram.

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  • 基于边界傅立叶变换一种重要形状描述方法利用图像边界信息而忽略了图像的区域信息。

    The edge Fourier transform is an important shape descriptor, but it makes use of only the image edge information ignoring the image region information.

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  • 并且分别利用原子显微镜傅立叶变换红外光谱薄膜进行界面形态和微观结构分析。

    The surface morphology and chemical structure of the film are characterized by Atomic Force Microscope (AFM) and Fourier Transform Infrared Spectroscope (FTIR).

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  • 有一种直接基于DFT信道估计方法利用均匀梳状分布的导频符号离散傅立叶变换(DFT)完成信道估计。

    The direct DFT based channel estimation method uses comb-type pilot symbol and discrete Fourier transform (DFT) to estimate the channel.

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  • 利用FDSP数字信号处理优势优化改进了离散傅立叶变换(DFT)算法提取信号特征量。

    Making use of the advantage of the FDSP in the digital signal processing, we can optimize and improve discrete Fourier transform (DFT) in order to acquire the characteristic variables of the signal.

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  • 据以往研究,假设渗透系数遵循对数正态分布利用直接傅立叶变换方法生成渗透系数随机场。

    On the assumption that the hydraulic conductivity field follows a lognormal distribution, the direct Fourier transform is introduced to generate multiple realizations of hydraulic conductivity field.

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  • 方程任意分布形式输入光束具有普适性、便于利用快速傅立叶变换算法实现

    This equation is adapted to any shape's input beam and can be easily realized using fft arithmetic.

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  • 综合孔径辐射计利用孔径综合原理空间频率域中采样通过傅立叶变换其他数学变换获取反演亮温图像

    Synthetic aperture radiometer applies the interferometric principle to sample in the spatial frequency domain and retrieves the image by Fourier or other numerical transformation.

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  • 利用分数傅立叶变换级次任意性,提出基于分数傅立叶图象水印方案

    It presents a blind image watermarking scheme based on fractional Fourier domain by utilizing that the order of fractional Fourier transform is freewill.

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  • 提出一种利用信号对称拓展技术抑制离散傅立叶变换频谱泄漏方法实验证明一种有效方法

    The restrain method of DFT frequency spectrum leakage base on signal symmetry extension is proposed in this paper, experimental results show that this method is effective.

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  • 利用二维快速傅立叶变换的时频分析方法有限元计算得到时域信号进行分离,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.

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  • 利用快速傅立叶变换方法谐波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.

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  • 利用快速傅立叶变换方法谐波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.

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