inverse Fourier transform
英
美 [ˌɪnˈvɜːrs ˈfʊrieɪ trænsˈfɔːrm]
网络 傅立叶逆变换; 傅里叶反变换; 傅里叶逆变换; 转换; 逆傅立叶变换
双语例句
- Through making the inverse Fourier transform to test light source's interferogram, the authors obtained the spectrum of test source.
通过对测试光干涉图做傅里叶逆变换得到测试光光谱图。 - The original image was reconstructed exactly through the inverse Fourier transform to the coded image.
对编码的实值图像作逆傅里叶变换，可以准确地重建原图像。 - The method consisted in taking the envelope of the inverse Fourier transform of a corrected measured signal.
该方法能对修正的检测信号能量谱的对数微商求逆傅里叶变换。 - Simulation Analysis of Pavement Evenness Based on Inverse Fast Fourier Transform
基于快速傅里叶逆变换的路面平整度仿真分析 - Substituting the represented points in the proposed random function model and performing the inverse Fourier transform yield the assembles of the stochastic accelerograms.
以所选模型参数代表点代入地震动随机函数模型，即可以得到地震动时程样本集合。 - Further, with the help of the convolution theorem and inverse FOURIER transform, a semi-analytical solution of the velocity response under semi-sine impulse exciting is obtained.
然后利用卷积定理和傅立叶逆变换求得瞬态半个正弦波作用下桩顶响应的振动半解析解； - We use the character of Fourier transform and Inverse Fourier transform ( conjugate character) to solve the difficult problem and temporal differential coefficient, and we use the method of second order center finite difference to solve the question.
我们利用实信号的傅立叶变换和反傅立叶变换的基本性质即共轭性解决了空间偏导数的离散化问题，对于时间偏导数，我们则采用二阶中心差分的方法解决。 - Such numerical solution is iterated for all the waves with different frequencies, and all the numerical solutions are transformed into the light fields in the time domain by inverse Fourier transform.
然后把这种数值解方法分别运用到所有频率的单色波即可就出其对应的光场，而且对所有的这些数值解作逆付里叶变换就可以将其转换为时间领域的光场。 - The rail irregularity was simulated by a new method-first getting the spectral amplitude corresponding to given power spectral density function and the stochastic phrase, and then doing inverse Fourier transform. The result shows it is more effective than often used triangular series method.
对给定的功率谱密度函数，构造等效的频谱幅值和随机相位后再作Fourier逆变换来模拟轨道不平顺，结果表明新方法比通常的三角级数法更为有效。 - Through the inverse Fourier transform, spatial Green's functions are obtained.
用高精度的数值积分法将谱域格林函数经逆傅里叶变换，求得了格林函数的空域结果。 - A number of numerical examples are given and the results are compared with ones obtained from inverse Fourier transform ( IDFT).
计算了一系列的实例，并将计算结果与采用离散傅立叶反变换法计算得到的结果进行了比较。 - Compared with traditional inverse Fourier transform method, which used zeros padding method, at the same condition of sampling resolution, the method proposed could decrease the calculation load.
与传统的数据长度补零逆傅里叶变换方法相比，在相同的采样分辨率条件下，该方法能有效减小计算量。 - This paper describes a new method which uses IDFT ( Inverse Discrete Fourier Transform) technique to do time domain near field measurement for antenna.
本文提出了一种利用离散付立叶反变换（IDFT）技术完成天线的时域近场测量的方法。 - In Fourier transform profilometry ( FTP), projecting a structure field of grating pattern onto a measured object, a deformed fringe pattern is captured. The height distribution of the measured object can be determined by Fourier transform, filtering and inverse Fourier transform.
在傅里叶变换轮廓术（FTP）测量方法中，成像装置获取受到物体高度调制后的变形结构光场，通过傅里叶变换，滤波和逆傅里叶变换恢复出物体高度分布。 - According to Plane Wave Spectrum ( PWS) theory, distribution of extraneous waves in angular domain will be obtained by making inverse Fourier transform to test zone field, which provides the guidance for eliminating them.
根据平面波谱理论，对静区空间场做反傅里叶变换，可以在角度域反演出干扰波分布规律，从而为排除干扰源提供理论依据。 - A new algorithm for array synthesis based on inverse Discrete Fourier Transform ( IDFT) is proposed in the paper.
基于逆离散傅立叶变换（IDFT）算法，提出了一种新的阵列综合算法。 - IFT-TOA, the frequency domain method based on IFT ( inverse Fourier transform), was studied.
讨论了频域TOA的逆傅立叶变换（IFT）方法，即IFT-TOA方法。 - Then Kirchhoff approximation is introduced to the far-field expression of scattering amplitudes in the integral representation. The shape reconstruction of the scatterer is performed by the inverse Fourier transform of the approximated scattering amplitudes.
在远场散射幅值的积分表达式中引入了Kirchhoff近似，进而用散射幅值的三维逆Fourier变换重构缺陷的形状。 - The method adopts the frequency domain masking technique to mask the peak fields of the radar echos 'Fourier transform data, and uses the fractional correlation comprising of Fractional Fourier Transform ( FrFT) and inverse Fourier transform to detect the ARM only in one-dimensional searching.
该方法利用雷达回波的频域（Fourier变换）数据，根据尖锋作遮隔处理后，直接运用基于分数阶Fourier变换（FrFT）和Fourier逆变换的分数阶相关方法，通过一维搜索来检测ARM。 - The primary function of the auxiliary signal generator is output sine wave or SWIFT ( stored wave form inverse Fourier transform) wave at the scheduled time.
辅助信号发生器的主要功能是在规定的时间段内输出正弦波或者任意波形。 - When the distance between positive and inverse Fourier transform system changes, the CCD is adjusted to the focal plane by variable value of interval between two peaks on CCD with computer.
通过镜组移动改变正、负傅里叶变换系统的距离，用软件比较CCD上两个波峰的间隔是否变化来对CCD进行定焦。 - Find the Inverse Fourier Transform by Using the Properties of the Fourier Transform
应用Fourier变换性质求Fourier反变换 - The filter is put on the power spectrum before applying the inverse Fourier transform to yield the correlation output. This technique can be used in pattern recognition of grey level input image.
将这种滤波器放置在傅里叶反变换产生相关输出之前的联合功率谱面上，该技术可以应用在具有不同灰度图像的模式识别中。 - Fourier transform and inverse Fourier transform build up mapping for signal between time domain and frequency domain.
傅立叶变换及其反变换建立了信号时域与频域的映射关系。 - With the increase of the initial attack Angle, reduced stability of Bridges. ( 3) Adopts MATLAB software, using spectral representation and fixed inverse Fourier transform method simulate fluctuating wind field of bridge.
随着初始风攻角的加大，桥梁的稳定性降低。（3）运用MATLAB软件，采用谐波合成法与修正逆傅里叶变换法模拟了桥梁的脉动风场。 - By means of inverse Fourier transform technique and convolution theorem, the semi-analytical solution for the velocity response of a pile undergoing half-cycle sine pulse at the pile head is obtained in the time domain.
在此基础上，利用Fourier逆变换和卷积定理，求得了半正弦脉冲激励作用下桩顶速度时域响应的半解析解。 - Compared with the earlier approaches, there are two attracting advantages to be gained. One is that all the proposed schemes do not need the tedious time-domain convolution products. The other is that it avoids the time-domain non-causality brought by the inverse Fourier transform technique.
与早期方法相比，论文提出的方法具有两个优点：一、避免了繁琐的卷积运算；二、避免了由逆傅立叶变换引起的非因果时域误差。 - The inverse Fourier Transform gives the transient response of structures.
在此基础上，利用傅立叶逆变换求出结构的瞬态响应。 - Research on time domain TOA and frequency domain IFT-TOA in mine tunnels Problems of the time domain wideband TOA method when applied in multi-path environments were discussed in detail. IFT-TOA, the frequency domain method based on IFT ( inverse Fourier transform), was studied.
井下巷道中的时域TOA及频域IFT-TOA方法研究分析时域宽带TOA方法在多径信道中应用时存在的问题；讨论了频域TOA的逆傅立叶变换（IFT）方法，即IFT-TOA方法。 - However, non-uniform frequency points of the semi-circle trajectory are not suitable for applying the fast inverse Fourier transform for image reconstruction.
然而，半圆弧轨迹上的非均匀频域点不在矩形网格上，不能直接应用计算效率高的快速傅立叶逆变换得到重建图像。