chapter-4

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.

说明：  数值分析中没经预处理的高斯方法、经SSOR预处理的高斯方法、经多项式预处理的高斯方法matlab程序(Numerical analysis did not pretreated Gauss method, the SSOR pre-Gaussian method, the pre-Gaussian polynomial method matlab program)

本Matlab代码是检验一个有向图是否是一个弱距离正则图(The Matlab code is to test a directed graph is a weak distance-regular graph)

toadv hop localization algorithm

基于MATLAB的确定性系统的分岔与混沌的设计程序(MATLAB-based deterministic system, bifurcation and chaos in the design process)

该程序利用matlab语言主要实现（7，3）线性分组码的译码，并提取信息码(The program achieved using matlab language major (7,3) linear block code decoding, and extracting information codes)

侧向定位蒙特卡洛仿真GDOP分析，验证了数据融合方法的精度(GDOP lateral positioning Monte Carlo simulation analysis to verify the accuracy of the data fusion methods)

本程序是用于信号相关分析的实验程序， 主要功能是计算和比较几种信号的相关函数。(Auto Correlation matlab program)

simulation presure proses rig with NN backpropagation

两个相控阵天线时域波的传播不同阶段主要表现不同(In this code, the time domain wave propagation for two phased array antennas at different phase differences are shown. Thanks to the constructive and destructive interferences, the main beam of the wave is steered towards angle of interest. This code is used to generate the following animation: )