Fourier的例句大全

A New Method to test Focal Length Using Fourier Spectrum

一种利用傅立叶频谱测量透镜焦距的新方法

NSPS in this limiting form can be written as generalized Fourier integrals which reduce to ordinary phase shift in the constant velocity limit.

NSPS的这种极限形式可以写成广义的傅氏积分，在常速度极限情况下积分减少了普通相移。

Study of Focal Length Measurement of Fourier Lens With Spectral Analysis Method

频谱分析法测量傅里叶透镜焦距的研究

Based on theoretic analysis of Fourier heat transfer law and first thermodynamic law. we program the heat transfer numerical simulate programme of one dimension and of two dimensions that fit laser irradiation.

本文在用傅立叶（Fourier）热传导定律和热力学第一定律进行理论分析的基础上，独立编制了适合于激光辐照的一维和二维热传导数值模拟程序；

Fractional Fourier transform of spherical refracting system and compound thick lens

球面折射系统和复合厚透镜的分数傅里叶变换

Fourier Transform of a Thick Lens in the Illumination of Gaussian Beam

高斯光束照明下厚透镜的付里叶变换

For a thin interbed of sand and shale, the periodicity of its amplitude or phase spectrum can be unveiled with Fourier analysis in a narrow window.

对砂泥岩薄互层段，用短时窗对地震道做傅里叶分析，可以显示薄层振幅谱和相位谱的周期性。

According to the Fourier transform relationship exists between the array factor and the element excitations in thinned array, an iterative fast Fourier transform algorithm based on the classic density-tapered array optimization design is presented and the detailed theory of the method is discussed. 3.

根据稀疏阵列中阵列因子与阵元激励之间存在的傅里叶变换关系，在经典密度加权阵列设计方法的基础上，完善了一种基于迭代FFT算法的阵列优化方法，并详细阐述了其原理。

The Fourier transform spectrum of the temporal output intensity has provided important informations for the instability behaviour analysis of tho system.

输出强度的快速傅里叶变换谱为此系统的非稳特性分析提供了重要信息。

Study of the Automatic Measurement for Three-dimensional Shapes of Fabric Appearance with Two-dimensional Fourier Transform Profilometry

基于二维傅立叶变换轮廓法的织物表面形态测量研究

First, through the Fourier expansion, the expansion of the function u ∈ H 3 ( e) was obtained. Then, the three-dimensional interpolation operator of projection type was introduced. Finally, an equivalent construction method of this operator was given.

首先通过Fourier展开得到函数u∈H3（e）的展开式，然后介绍了三维投影型插值算子，最后给出了这个算子的一个等价构作方法。

In Fourier transform profilometry ( FTP), zero frequency of the captured patterns influences the measuring range and measuring precision, and even makes the reconstruction of three-dimensional surface incorrect.

在实际傅里叶变换轮廓术测量中，获取条纹图的零频分量对傅里叶变换轮廓术的测量精度和测量范围有很大影响，甚至妨碍三维面形的正确重建。

In a white-light optical processing system, if the filter apertures vibrate randomly around the rainbow diffraction spectra at Fourier plane, the amplitude grain noise of the grating encoded film in the output plane can be suppressed considerably and the output SNR is improved.

本文提出在白光信息处理中，可通过使滤波孔在傅里叶面彩虹状衍射谱附近做随机振动的方法，达到抑制光栅编码片的振幅型颗粒噪声。

The background subtraction, Fourier filtering, and the choice of the threshold energy were discussed.

包括背景扣除、富里叶滤波、能量阈值的选取、以及结构参数的确定等问题。

Solving Plane problems of Anisotropic Body with Center Through Crack by Fourier Integral Transform

用Fourier积分变换解各向异性体中心穿透裂纹平面问题

Use high precision zero flux through current sensors which fit the industrial environments to achieve the goal of measuring the end of the screen small current accurately, then use discrete Fourier transform to calculate the dielectric loss factor devices to achieve a capacitive device online monitoring system.

选用在工业环境下具有高精度零磁通穿芯式电流传感器，实现了末屏小电流的精确检测，并采用离散傅里叶变换计算出设备的介质损耗因数，实现了容性设备在线监测系统。

Fourier Inversion method has certain superiority in the computation accuracy, but its operation is more tedious, is not easy to implement.

Fourier Inversion方法在计算准确度上有一定的优势，但是其运算较为繁琐，不易实行。

By utilizing the transformation of time& space coordinates, the transformation of wave velocity and the Fourier transformation, this paper derivates the general expressions of Doppler effects of electromagnetic wave and elastic wave.

本文利用时空坐标变换、波速变换及傅里叶变换的方法，导出了弹性波和电磁波多普勒效应的普遍公式。

The results show that there is a time delay between Fourier model and non-Fourier models.

发现非傅立叶模型较傅立叶模型有一定的时间延迟，DPL模型与C-V模型的延迟差别不太大；

By using Fourier's series, the sufficient and necessary condition is obtained for periodic solutions to neutral time delay differential equations with variable coefficients and, in the meantime, a formula of evaluation of period is given, also.

通过Fourier级数方法，得到时滞微分方程连续可微周期解存在的充要条件，同时为如何找周期提供了一个公式时间（英文）