According to the Fourier diffraction projection theory,the Fourier transform of projection data from multi-band frequency ultrasonic is distributed over complex plane in form of different radius arcs.
根据傅立叶衍射投影定理,不同频率超声波得到的投影数据的傅立叶变换分布在复平面为不同半径的圆弧,提出了多频率超声衍射层析成像思想,并进行了实验研究,重建的时间比单频率法短约70%。
Non-lens Implementation of Fractional Inverse Fourier Transform;
光学分数傅里叶逆变换的无透镜模式
Single-lens Optical Realization of Fractional Inverse Fourier Transform;
分数傅里叶逆变换的单透镜光学实现
Single-lens Implementation of Fractional Inverse Fourier Transform;
光学分数傅里叶逆变换的单透镜模式
Comparative study of Fourier descriptors;
几种傅里叶子的深入比较研究
There are too many boundary feature description methods for object recognition,three main methods are Fourier descriptors,Relative moments, mathematical morphology.
实际应用中,对物体边界特征描述的方法很多,本文对数学形态学、相对矩、基于极半径函数的傅里叶子这几种方法进行了比较研究。
Fourier diffraction projection theorem
傅里叶绕射投影原理
Fourier transformation is used to analyze the spatial frequency spectrum and intensity distribution of the diffraction beams.
介绍了设计原理方法，采用傅里叶变换分析了衍射光束的空间频谱及光强分布。
Study on Improving the Precision of FTP Based on DLP Projector;
提高数字光投影傅里叶变换轮廓术精度的方法研究
Effects of Scan Rate of the Fourier Transformation Spectroscopy on Test Result
傅里叶光谱仪扫描速度对测试的影响
Fuze FFT Processor Based on DSP
基于DSP的引信快速傅里叶信号处理器
The Calculation of Light Intensity Distribution of Single Seam Diffraction by Fourier Transformation
用傅里叶变换计算单缝衍射的光强分布
Study on Point-diffraction Interferometry Based on Fourier Transform;
基于傅里叶变换的点衍射干涉术的研究
Fourier-Curvelet Transform Combined Image Restoration
组合傅里叶变换与曲波变换的图像复原
Spectral recovery software for fiber Fourier transform spectrometer
光纤傅里叶变换光谱仪光谱复原软件开发
Study on the Effect of C-Terminal Acidic Protein on the Prokaryotic Expression of α-Thionin by FTIR Microspectroscopy
傅里叶显微红外研究C-末端酸性蛋白对α-硫素原核表达过程的影响
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
The Applications and Researches of Fractional Fourier Transform in Digital Image Processing;
分数傅里叶变换在数字图像处理中的应用研究
Theoretical Research about Femtosecond Laser Pulse Fourier Space-Time Transform Shaping
飞秒激光脉冲傅里叶时空变换整形理论研究
Fractional Fourier Transform in Seismic Data Processing Applications
分数傅里叶变换在地震资料处理中的应用初探
View of the Development of Signal Processing Through the Shortage of Fourier Transform
从傅里叶变换的应用缺点看信号处理的发展
Fourier transform infrared spectrometer
傅里叶变换红外光谱仪
continuous scanning Fourier spectroscope
连续扫描傅里叶光谱仪
Fourier transform Ramman spectroscopy
傅里叶变换拉曼光谱学