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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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HRV
说明： 实现脉搏波信号心率变异性分析,时域分析，频域分析和非线性分析(HRV analysis of the PPG signals)
- 2020-06-09 18:20:56下载
- 积分：1
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JABVNYZ247
Dijkstra’s算法的实现,还有具体的实验报告,欢迎下载()
- 2018-05-26 13:38:19下载
- 积分：1
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反走样处理的八面体
本例功能是显示一个由反走样处理的线段组成的八面体(functions of the cases showed an anti-aliasing by the Line of octahedral)
- 2005-05-14 12:09:01下载
- 积分：1
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频域滤波
说明： 编程实现灰度图像的频域滤波算法。使用Matlab实现不延拓和延拓两个版本。对于延拓和不延拓版本，在理想低通滤波器、巴特沃斯低通滤波器和高斯低通滤波器上比较两者的区别；对于延拓版本，比较不同参数设置对上述三种滤波器滤波结果的影响。(Program to realize the filtering algorithm of gray image in frequency domain. Matlab is used to realize two versions of no extension and extension. For the extension version and the non extension version, the differences between the ideal low-pass filter, Butterworth low-pass filter and Gauss low-pass filter are compared; for the extension version, the effects of different parameter settings on the above three filter results are compared.)
- 2020-12-20 09:49:09下载
- 积分：1
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86346644
图像的复制剪切粘贴，Visual C++编程技巧精选，很好的参考资料。(Copy cut and paste image, Visual C++ programming skills selected, a good reference.)
- 2013-11-17 06:09:48下载
- 积分：1
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mesh
dish tracking techniques
- 2014-08-19 15:43:37下载
- 积分：1
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matlab-susan
说明： 图像处理中，一种新的边缘检测，特征点提取方法，算法经过测试，可以运行，对医学图像处理的人有帮助(Image processing, a new edge detection, feature point extraction method, the algorithm has been tested, you can run on the medical image processing to help the people)
- 2009-08-03 13:35:22下载
- 积分：1
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2
输入整数n，显示出具有n行的杨辉三角形。一个具有10行的杨辉三角形运行结果(Enter an integer n, with n rows show the Triangle. Triangle with the results of a 10 line)
- 2013-12-15 16:17:20下载
- 积分：1
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HW3
给出已有图片中小球的个数。（图中有很多很多个）(Picture has been given the number of small balls. (Chart There are many, many months))
- 2009-12-02 03:46:32下载
- 积分：1
