split1

Ii this file developing a sample website for elearning

通过并行压缩进行二维信号压缩，提出了一种利用并行压缩传感技术对二维信号进行压缩的新方案。根据这个原理，译码器的重新构造可以并行进行。通过对二维信号进行某些排列，可以确保所有列具有大致相同的密度级别，并且可以使用相同的测量矩阵进行采样。这样可以避免二维信号的矢量化，从而大大减小测量矩阵的尺寸。我们证明，如果排列良好，重建均方误差的上限会更紧。为了说明这一方案，我们将其应用于视频压缩并使用不同帧的排列有两种：参考帧的基于Z字形扫描的排列和非参考帧的基于块测试的排列。仿真结果表明，在相同的压缩比下，峰值信噪比比比在无置换情况下可提高3-7db左右。(we propose a new scheme to compress 2D signals using parallel compressed sensing. According to this seheme, the reeonstruction at the decoder can be performed in parallel. By performing certain permutation on a 2D signal, all columns are insured to have approximately the same density level and can be sampled using the same measurement matrix. In this way, vectorization of a 2D signal can be avoided, and thus the size of the measurement matrix can be dramatically reduced. We prove that with a good permutation, we can have a tighter upper bound on reconstruction mean square error. To illustrate this scheme, we apply it to video compression and use two kinds of permutations for different frames: the zigzag-scanbased permutation for reference frames and the block-test-based permutation for non-reference frames. Simulation results show that under the same compression ratio, the peak signal-to-noise ratio can be improved by approximately 3-7 dB compared to the case without permutation.)

IEEE14潮流计算 牛拉法 直角坐标形式 (The IEEE14 node power flow calculation cattle Rafah rectangular coordinate form)

EMD 算法，消除信号趋势项，可以作为信号预处理的部分(Part of the EMD algorithm to eliminate the signal trend term, can serve as a signal preprocessing)

LDGM decoder function for Matlab.

说明：  经典图书Courant, Hilbert - Methods of Mathematical Physics Vol. 1 50年不倒的经典图书，值得一看，是学习数学物理方法的经典名著(Classic books Courant, Hilbert- Methods of Mathematical Physics Vol. 1 50 will not be brought down in the classic books, worth a visit is to study methods of mathematical physics classics)

一个适合与做二维图像的聚类算法 我是做图像的 大家加我qq：31781508(suitable for a 2-dimensional image and the clustering algorithm I have to do all the images for my qq : 31781508)

该matlab函数可以在matlab环境下读取pgm文件(To read the file of pgm format)

这是PSK在MATLAB上调制的源程序！希望大家可以用的上！(This is the MATLAB PSK modulation on the source! Hope that we can use!)

skin segmentation base on RGB color space. does not work for gray level images