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The design and implementation of a harmonic current computation technique for active power filter based on a simplified Discrete Fourier Transform is presented.

文章介绍了一种在有源滤波控制器应用中基于简化离散傅立叶变换的谐波电流检测技术的设计和应用。

This algorithm is based on two dimensional discrete Fourier transform (2DFT).

该水印算法基于二维离散傅立叶变换(2DFT)。

The main work of the dissertation is summarized as follows:First, a new method of digital watermarking scalable vector graphics based on discrete fractional fourier transform is proposed.

本文主要的工作归纳如下：首先，提出了基于离散分数傅立叶变换的SVG图形水印算法。

An echo model of ultra-high speed moving target was established,and its effect on pulse Doppler processing was analyzed.

建立了超高速运动目标的回波模型，分析了其对目标检测中脉冲多普勒处理的影响，并提出了基于匹配傅立叶变换的脉冲多普勒处理方法。

Based on density functional theory calculation with periodic boundary conditions, the possibility of the direct coupling of methanol into ethene by oxonium ylide mechanism was investigated.

采用基于周期性边界条件的密度泛函理论研究了HSAPO-34分子筛上甲醇通过氧鎓叶立德机理直接耦合生成乙烯的可能性。

All states and regions set up the principle of explicitness by constitutional legislation or constitutional justice.

基于此，世界各国与地区均通过立宪或司宪的途径确立了法律明确性原则。

As a traditional method, the system based on Fourier analysis and frequency spectrum analyzer can not be used to test 1/f noise timely, fast and accurately.

传统基于傅立叶分析和频谱分析仪的微弱信号检测方法无法对1/f噪声进行实时、高速、精确的测量与分析。

A study was performed on the PIV algorithm based on fast Fourier transformation,and the PIV program was compiled and verified.

在粒子图像测速原理的基础上研究了基于快速傅立叶变换的粒子图像测速算法，并编制算法程序进行验证。

The method to eliminate Moire fringes is achieved by three methods: fast Fourier transformation, interpolation, and smooth.

分别使用基于快速傅立叶变换的切口滤波器的方法、模板插值法和柔化法来消除莫尔条纹，达到了目的。

A leakage point positioning systerm is developed,which is based on correlation analysis of fast Fourier transformation for locationing the leakage in the pipe.

针对管道漏点定位问题，研制出了一套基于快速傅立叶变换的相关分析法管道泄漏点定位系统。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。