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Locating-Voltage-Sags
电压跌落是最严重的动态电能质量问题之一，
精确定位电压跌落起止时间是应对电压跌落问题的
重要前提和基础。由于电压采样信号往往有噪声分
量，现有的方法在定位电压跌落的起止时间时存在
局限性。本文提出利用多小波变换及相邻系数去噪
的电压跌落定位方法。多小波兼有对称性、正交性、
有限支撑性和二阶消失矩等优异的信号处理性能，
利用GHM多小波可以准确定位电压跌落起止时间。
多小波变换系数在每层之间具有对应关系，多小波
相邻系数将紧相邻的若干个系数作为一个整体来确
定阈值，考虑了系数之间的相关性，能获得更好的
去噪效果。通过 Matlab 进行仿真验证，仿真结果表
明，所提出的方法的正确性。
(Voltage sag is one of the most serious
dynamic power quality problems. Critical start-time
and end-time are important indices for voltage sags.
But the sampling signals often have noisy component,
the locations of start-time and end-time are hard to get.
Wavelet is an effective tool for those non-stationary
signal processing and has been used in this field. Local
feature in the signal can be enlarged after the
transformation using the scalar wavelet. But scalar
wavelets cannot contain orthogonality, symmetry,
compact support and higher order of vanishing
moments simultaneously. In this thesis, multi-wavelets
GHM is used to detect and locate power quality
disturbances. Multi-wavelets offer many excellent
properties such as the same approximation order but
more compact support. The dependence of the
multi-wavelets coefficients varies with the level, so
neighboring coefficien)
- 2014-03-25 17:08:50下载
- 积分：1
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pinggu
基于matlab实现对 图像的亮度提取 以及对其亮度均匀性进行评估！(Matlab-based implementation of image brightness, as well as its extraction to assess the uniformity of brightness!)
- 2009-03-03 22:28:59下载
- 积分：1
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vlfeat-0.9.212
包括聚类分析，支持向量机，随机森林等算法(Including clustering analysis, support vector machines, random forests and other algorithms.)
- 2018-04-30 10:03:04下载
- 积分：1
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feature-selection
对特征选择与提取进行介绍，及几个特征提取方法简介(For feature selection and extraction are introduced, and several feature extraction methods Introduction)
- 2014-05-12 14:39:58下载
- 积分：1
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HistDemoA
说明： VC做的图像直方图均衡化小程序，有助于学习图像处理基本知识(VC image histogram equalization do applet can help to learn basic knowledge of image processing)
- 2009-08-31 14:36:38下载
- 积分：1
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Color-gamut-calculation
根据输入的色坐标自动计算出色域,并标注在CIE-1931色度图上.(Automatically calculate based on the input color coordinates of the gamut, and marked in the CIE-1931 chromaticity diagram....
)
- 2012-02-24 12:45:07下载
- 积分：1
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Using-a-Boosted-Cascade
行人目标检测 代码文件基于hog+svm检测技术。(people dectect and depending on hog+svm )
- 2014-05-26 12:24:19下载
- 积分：1
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AutomaticRadialDistortionEstimation
图像处理中C#畸变校正程序，针对鱼眼图像的径向畸变校正，利用空间直线在校正图像中仍然为直线的基本原理，且直线在除法模型下为圆弧，从而可以通过检测圆弧对鱼眼图像进行畸变校正。(Image processing program C# distortion correction for radial fisheye image distortion correction, the use of space in a straight line in the corrected image as the basic principle is still straight, and a straight line at the division model is a circular arc, so that the arc can be detected by fish eye image distortion correction.)
- 2014-12-01 16:27:10下载
- 积分：1
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三次B样条曲线
用C语言编写的三次B样条曲线源代码!(C language prepared by the cubic B-spline curves source code!)
- 2020-09-30 14:27:45下载
- 积分：1
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S-UNIWARD_matlab
对图像的隐写术，进行信息隐藏，版权保护。(Steganography is used to hide information and copyright protection.)
- 2021-03-21 15:09:17下载
- 积分：1
