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傅里叶
相关语句
  fourier
     Study on Fractional Fourier Optics and Its Application
     分数傅里叶光学的应用研究
短句来源
     Study on New Radar Signal Processing Method--Matched Fourier Transform
     雷达信号处理的新方法——匹配傅里叶变换研究
短句来源
     The experiments of word-translation with Fourier hologram
     用傅里叶全息图进行单词互译的实验
短句来源
     ZOOMFT—AN ALGORITHM TO INCREASE LOCAL RESOLUTION OF FOURIER SPECTRUM
     局部加密傅里叶谱分析ZOOMFT的介绍
短句来源
     FOURIER ANALYSIS OF RAINBOW HOLOGRAPHIC IMAGING
     彩虹全息图成象的傅里叶分析
短句来源
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  fourier transform
     Study on New Radar Signal Processing Method--Matched Fourier Transform
     雷达信号处理的新方法——匹配傅里叶变换研究
短句来源
     FOURIER TRANSFORM SPECTROSCOPY ——INTRODUCTION AND PROGRESS——
     傅里叶变换光谱学——引论和进展
短句来源
     A Program for Generating the General N Winograd Fourier Transform Algorithm (WFTA) Program
     一个能生成一般N Winograd傅里叶交换(WFTA)程序的程序
短句来源
     A Comparison of the Fourier Transform Spectrometer (FTS) with the Grating Spectrometer (GS)
     傅里叶变换分光仪与光栅分光仪的对比
短句来源
     An Approximate Algorithm of Fourier Transform
     傅里叶变换的一种近似算法
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  “傅里叶”译为未确定词的双语例句
     THE IN SITU AND ON LINE FTIR STUDY ON DYNAMIC PYROLYTIC PRODUCTS OF ACRYLONITRLLE COPOLYMERS
     丙烯腈共聚物动态热产物的在位和在线傅里叶红外光谱研究
短句来源
     SOLVING THE PROBLEMS OF CERTAIN SOLUTIONS BY THE FINITE DOUBLE FOURI ER TRANSFORMS
     用有限的二重傅里叶变换解定解问题
短句来源
     Wavefront deviation measurement of Fourier-transform lenses
     傅里叶变换物镜的波象差测试
短句来源
     A Dynamic Holography of High Speed,Many-frame and storing Fourier-Specture Hare Success in Experiment
     高速、多幅、傅里叶频谱存贮型动态全息干涉术实验成功
短句来源
     Fourier-Operator-Method Interpretation of Abbe's Theory of Image Formation with Coherent Illumination
     相干阿贝成象理论的傅里叶算符描述方法
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  fourier
Fourier transform, parabolic induction, and nilpotent orbits
      
We prove that in the symmetric space setting the functors of Fourier transform (in the sense of Deligne) and parabolic induction (in the sense of Lusztig) commute.
      
In this paper we compute the Fourier transform of the diagonal distribution for $\phi_{*}\mu,$ relative to a compatible triangular decomposition of G, the complexification of U.
      
Fourier transforms related to a root system of rank 1
      
We study eigenfunctions of a Dunkl-Cherednik-type operator in the algebra $\mathcal H$, and the corresponding Fourier transforms.
      
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  fourier transform
Fourier transform, parabolic induction, and nilpotent orbits
      
We prove that in the symmetric space setting the functors of Fourier transform (in the sense of Deligne) and parabolic induction (in the sense of Lusztig) commute.
      
In this paper we compute the Fourier transform of the diagonal distribution for $\phi_{*}\mu,$ relative to a compatible triangular decomposition of G, the complexification of U.
      
Hence we consider functions F(x) ≥ 0, the Fourier transform f(u) of which satisfies |f(u)| ≤ ε for all u in a subset of (-∞,-1] ? [1,∞), and are interested in bounds on |f(u)| for |u| ≤ 1.
      
We also dealt with the question of how large the supremum KS of all numbers |f(u)| is with f the Fourier transform of a nonnegative integrable function F and f(0) = 1, |f(ku)| ≤ ε for k ∈ S.
      
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In this article general formulas are derived which account for the influence of X-ray geometry, the nonideal adjustment of goniometer and the parameters of recording system on the centre of gravity, on the mean-square width and on the Fourier coefficients of the line profile. Several related problems are briefly discussed.

本文研究X射线衍射仪的各种工作条件对干涉线纹的重心位置、均方宽度和傅里叶系数的影响,得出了普遍的公式。对若干有关问题也进行了讨论。

The abnormal phenomena in the transmitted light passing through a-LiIO_3 single crystals under the application of a DC field parallel to the c-axis have been further investigated by means of the direct projection method, the optical Fourier transfor-mation method and the Schlieren method. The change in the spacial frequency spectrum of a z-cut crystal plate with the increase of the applied field intensity was examined. It was observed that the diffraction efficiency of the transmitted light shows a linear dependence...

The abnormal phenomena in the transmitted light passing through a-LiIO_3 single crystals under the application of a DC field parallel to the c-axis have been further investigated by means of the direct projection method, the optical Fourier transfor-mation method and the Schlieren method. The change in the spacial frequency spectrum of a z-cut crystal plate with the increase of the applied field intensity was examined. It was observed that the diffraction efficiency of the transmitted light shows a linear dependence on the applied voltage, but is independent of the polariza-tion of the incident light. It was also found that the light polarization is not changed by the action of the DC field and the effect of absorption is negligible. The relaxa-tion process of the change in diffraction efficiency with time was recorded quantita-tively. A tentative explanation of these phenomena has been given.

本文利用投影法、光学傅里叶频谱分析法和纹影法,对静电场作用下α-碘酸锂单晶的透射光场异常分布作了进一步观察。考察了z-切样品的透射光场的空间频谱随电压升高而改变的情况。利用高通滤波器进行滤波,观察到晶体的透射光的衍射效率与外加电压成线性关系,并与电场方向和晶体电正极面之相对取向有关,但是不依赖于入射光的偏振状态。消光比的测量表明,静电场的作用不改变光的偏振态。定量地记录了衍射效率随时间变化的弛豫过程。

The multipole fields are widely used in electron-optical devices and instruments. The multipole fields are generated by several azimuthaly-arranged electrodes or pole-pieces and, are thereby not rotational symmetric. They generally possess some planes of symmetry or anti-symmetry.

多极系统是由几个对称地放置在方位角方向上、并具有一定电(磁)位的电(磁)极所组成的系统。它们所产生的非旋转对称场称为多极场。多极场是一种广泛类型的电磁场。例如包括了各种偏转场,四极、六极、八极透镜场等。它们在电子束器件、电子光学仪器和高能加速器中得到广泛应用。本文采用傅里叶展开法将求解空间(三维)的电磁多极场问题化为求解一系列的二维谐波电(磁)位的问题。这些谐波电(磁)位满足一定的二阶偏微分方程,在一定的边界条件下,可以采用逐次张弛方法进行求解。然后将谐波电(磁)位迭加,便得到所要求的多极场的电(磁)位分布。编制了计算电磁多极场的通用程序。对于几种典型的多极场模型(单个和二单元的四极透镜,以及圆柱环形偏转线圈等)进行了计算与检验。计算实践表明,这种傅里叶展开法适用于计算电子束器件和各种电子光学仪器中的多极场,并可算出其边缘效应(弥散场),因此具有一定的意义。

 
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