Encoding-of-LDPC-codes

用Matlab实现一副图片中多个人脸的识别，另附有一片文章以帮助了解，识别效果非常好，适应性很强。(Using matlab to achieve multiple faces recognition in a picture,and attach a text to help understand, the effect is very good,strong adaptability.)

利用时域有限差分法(FDTD法)对三维时谐电磁场进行模拟(Using finite difference time domain method (FDTD method) of three-dimensional time-harmonic electromagnetic field simulation)

This package contains a beta MATLAB version of the VSNR function from the paper "VSNR: A Wavelet-Based Visual Signal-to-Noise Ratio for Natural Images," D. M. Chandler and S. S. Hemami, published in the IEEE Transactions on Image Processing, September 2007.

经典的香农采样定理认为,为了不失真地恢复模拟信号,采样频率应该不小于奈奎斯特频率(即模拟信号 频谱中的最高频率)的两倍.但是其中除了利用到信号是有限带宽的假设外,没利用任何的其它先验信息.采集到 的数据存在很大程度的冗余.Donoho等人提出的压缩感知方法(Compressed Sensing或Compressive Sampling, CS)充分运用了大部分信号在预知的一组基上可以稀疏表示这一先验信息,利用随机投影实现了在远低于奈奎斯 特频率的采样频率下对压缩数据的直接采集.该方法不仅为降低采样频率提供了一种新思路,也为其它科学领域 的研究提供了新的契机.该文综述性地阐述了压缩感知方法的基本原理,给出了其中的一些约束问题和估计方法, 并介绍压缩感知理论的相关问题———矩阵填充,最后讨论了其未来可能的应用前景. (According to the conventional Shannon s sampling theorem,in order to represent the analog signal,the sampling rate should not be less than twice the Nyquist sampling rate.Howev- er,this theorem only makes use of the bandwidth information.As a result,the collected data contain many redundant information.The recently proposed sampling method,compressed sens- ing or compressive sampling(CS),can collect compressed data at the sampling rate much lower than that needed in Shannon s sampling theorem by exploring the compressibility of the signal. This paper presents a review on the basic theory of CS.Some of the restrictions and recovery methods in CS are also discussed.Finally,some potential applications based on CS are presented. )

小波包分析提取振动信号中的特征频率，可以广泛的应用于数据预测及数据分析,混沌的判断指标Lyapunov指数计算。( Wavelet packet analysis to extract vibration signal characteristic frequency, Can be widely used in data analysis and forecast data, Chaos indicator for Lyapunov index calculation.)

将成像器输出的高位深度（高于8bit）raw格式的码流文件切分、转换成可以显示输出的jpg文件(transfrom the RAW file to jpg files, and transfrom 12bit into 8bit for screen output)

讨论了多变量灰色预测模型的算法，给出了多变量灰色预测模型的Matlab程序(Gray discussed the multivariate prediction model algorithm, given a number of variables in the Matlab program gray prediction model)

掌握功率谱估计的方法,分别产生两个零均值的白噪声数据 1 u n 和  2 u n ， 其功率都为 2 0.12 u   ，让  1 u n 和  2 u n 分别通过一个FIR 系统，得到输出为  1 v n 和  2 v n 。(Master power spectrum estimation method)

改进的matlab导航算法文件，实现更搞笑的导航解算(improved matlab navigation algorithm, more effecient navigation computation is implemented)

是一篇pdf文档 。主要讲了，matlab中的GUI模块，得一些常见错误和解决办法。(Is a PDF document. Mainly about, the GUI module in MATLAB, some common errors and solutions. )