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Edge lines are extracted automatically from image, by acquiring points of extremum of first directional derivative vertical with edge line with Fourier transform in frequency domain.

同时，参考一阶方向导数的数值来排除一些非边缘点（一阶方向导数的数值为常数者，零也为常数）。

First, we extend the general finite element method from the function surface to the parameter function. Second, we bring this kind of method into the design of rational Bézier minimal surface. Third, we transform the problem of Dirichlet energy function into the problem of minimizing a discrete objective function.

首先推广了函数曲面中的有限元方法，进而研究如何针对参数曲面使用有限元方法，并把该方法引入到有理Bézier极小曲面造型的设计中，从而将连续的Dirichlet能量函数极小化问题，转化为一个离散形式的目标函数的极小化问题。

The Discrete Fourier Transform plays an important role in digital signal processing and many other fields.

引言 离散傅里叶变换在数字信号处理等许多领域中起着重要作用。

Discrete Fourier Transform is used for digital signal analysis and processing.

离散傅立叶变换是数字信号分析和处理中常用而有效的手段。

This is the Digital Signal Processing Chapter 2 Courseware - Discrete Fourier Transform part.

这是数字信号处理的第二章课件－离散付里叶变换部分。

Further analysis shows that the quadrature filtering algorithm is a simplified algorithm of Discrete Fourier Transform.

进一步分析表明，正交滤波算法是离散傅立叶变换的一种简化算法。

Secondly, the signal processing techniques of LFWCW radar based on Discrete Fourier Transform algorithm is investigated.

接着研究了采用LFMCW体制的毫米波导引头信号处理系统的信号处理方法。

New features include the Discrete Fourier Transform and its inverse.

新功能包括离散傅立叶变换及其反变换。

The Discrete Fourier Transform is used to process signals from the sensors of CMF.

本文对科氏流量计中基于DSP的信号处理算法进行了研究。

In order to eliminate the noise during channel estimation, a new channel estimation algorithm based on discrete Fourier transform is presented.

该文讨论了MC-CDMA的导频插入方式，提出一种基于离散傅里叶变换的信道估计算法。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。