Fig_channel_estimation_cdma_zheng

It explains how can we get auto color by matlab

本书是非常不错的信号检测与估计的书籍！值得一看！(fundamentals of stastic signal processing!)

在小波分析及其变换中，Hurst指数的Matlab实现(Wavelet analysis and transformation, Hurst exponent of Matlab achieve)

一个关于检点检测的matlab程序 已经成功实现(A point detection matlab procedures have been successfully)

信息隐藏算法中的PQ算法，其中编码部分使用的是湿纸编码，该隐藏算法性能较好。(A PQ method (m-file) for steganography)

denoise In BayesShrink[5] we determine the threshold for each subband assuming a Generalized Gaussian Distribution(GGD) . The GGD is given by GG¾ X ¯ (x) = C(¾ X ¯ )exp¡ [® (¾ X ¯ )jxj]¯ (6) ¡ 1 < x < 1 ¯ > 0, where ® (¾ X ¯ ) = ¾ ¡ 1 X [ ¡ (3=¯ ) ¡ (1=¯ ) ]1=2 and C(¾ X ¯ ) = ¯ ¢ ® (¾ X ¯ ) 2¡ ( 1 ¯ ) and ¡ (t) = R1 0 e¡ uut¡ 1du. The parameter ¾ X is the standard deviation and ¯ is the shape parameter It has been observed[5] that with a shape parameter ¯ ranging from 0.5 to 1, we can describe the the distribution of coefficients in a subband for a large set of natural images.Assuming such a distribution for the wavelet coefficients, we empirically estimate ¯ and ¾ X for each subband and try to find the threshold T which minimizes the Bayesian Risk, i.e, the expected value of the mean square error.

分析传统双向渐进结构优化方法（Bi-directional evolutionary structural optimization，简称BESO）存在不足的基础上，针对性的对数值计算进行了合理的改进。并在此基础上分别对宏观结构、微结构优化、材料/结构一体化等相关问题进行了多尺度、多相复合材料布局及拓扑优化等层次系统地研究(Based on the analysis of the shortcomings of the traditional Bi-directional evolutionary structural optimization (BESO), a reasonable improvement is made for numerical computation. Based on that, multi-level, multi-phase composite material layout and topology optimization are studied systematically.)

说明：  this is matlab code for create admittance matrix

OFDM基本原理仿真程序，本程序是基于IFFTFFT实现的OFDM系统仿真(The basic principles of OFDM simulation program, this program is implemented based on the OFDM system simulation IFFTFFT)

求解一个方阵的的按模最大的特征值及相应的特征向量。(By solving a square of the largest eigenvalue model and the corresponding eigenvectors.)