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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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bayesthresholding
说明： 这个代码是基于贝叶斯的阈值分割,很有用的(This code is based on the Bayesian threshold segmentation, very useful)
- 2008-12-02 20:14:17下载
- 积分：1
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svgalib-1.4.3.tar
说明： SVAG图形库, linux下面运行的图形库程序(SVAG graphics library, linux graphics library running the following procedure)
- 2008-09-04 23:05:55下载
- 积分：1
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Lee filter for speckle noise reduction
在自适应中值滤波的基础上，采用均值与方差得到一个阈值，来判断极值点是不是噪声点！(On the basis of adaptive median filtering, a threshold is obtained by means of mean and variance to determine whether the extreme point is a noise point!)
- 2017-10-02 13:54:48下载
- 积分：1
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S_NET
说明： 2019最新的神经网络隐写分析网络，对空域频域均可(The newest neural network steganographic analysis network 2019 is applicable to both spatial and frequency domain)
- 2019-06-06 12:21:16下载
- 积分：1
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Face Description with LBP MATLAB
说明： LBP模式下的人脸识别方法，matlab范例，有论文说明，LBP算法(LBP mode of face recognition method, matlab example, there are papers, LBP algorithm)
- 2021-02-19 22:07:33下载
- 积分：1
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八个方向的sobel边缘检测算法
利用八方向的sobel边缘检测，实现对图像多梯度的梯度检测，检测出的边缘信息更加平滑连续。(Eight direction Sobel edge detection is used to realize gradient detection of image multi gradient, and the edge information detected is more smooth and continuous.)
- 2018-06-12 11:35:37下载
- 积分：1
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白平衡方法
采用色温估计法做的白平衡操作，之前是打算用到水下处理的，当然这个算法和PS的白平衡比有点LOW，可是这个能够matlab，有一定用途(The white balance operation using the color temperature estimation method was intended to be used underwater. Of course, the white balance ratio of this algorithm and PS is a little LOW, but this can be used in matlab.)
- 2018-10-12 09:07:12下载
- 积分：1
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GS_phase_retrieval
一种可用的相位恢复算法，做图像处理的同学们可以参考(A effective phase retrieval algorithm)
- 2020-09-10 13:38:00下载
- 积分：1
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热电厂工程电气主接线
说明： 热电厂CAD图纸资料，在CAD软件中绘制(Thermal power plant CAD drawings)
- 2021-04-13 18:48:56下载
- 积分：1
