fourier inverse transform meaning in Chinese

傅里叶反变换
傅里叶逆变换

Images of huanghua pears were acquired by means of machine vision system the method to describe the shape of irregular fruit was studied , in which the fourier transform and fourier inverse transform were applied a sort of software for fruit shape identification based on artificial neural network was developed
利用机器视觉采集黄花梨图像，研究了不规则果品的形状描述方法，提出在黄花梨的分级过程中采用傅立叶变换与傅立叶反变换对来描述果形，开发了基于人工神经网络的果形识别软件。
The main work and achievements are summarized as follows : according to the spectrum analysis theory , the simple formula of the power spectrum between the excitation and the response is obtained . then the time - domain statistical properties of the structural response are acquired through fourier inverse transform , and cauchy ' s residue theorem is applied to solving the integral of fourier inverse transform , the structural dynamic reliability is calculated in terms of possion hypothesis based on first passage failure
主要研究内容如下：从谱分析理论出发，得到了激励与响应功率谱之间的简明关系式，由fourier逆变换得到响应的时域特征，利用cauchy留数理论处理fourier逆变换的积分式，基于首超破坏的possion假设计算结构系统的动力可靠性，并在此基础上进行结构优化设计，奠定了确定性模型的基础。