fft_filter2015.3.23

定点频域ICA，使用高斯函数、负熵最大化来处理语音信号分离问题的演示(FIXED-POINT FREQUENCY DOMAIN ICA with GENERALIZED GAUSSIAN FUNCTION BASED NEGENTROPY APPROXIMATION for SPEECH SIGNAL SEPARATION)

该程序用于求解时间延迟t和嵌入维数m，该方法不同于自相关函数法和gp法，可以同时求解出两个量t和m的值，非常方面，在求解lyapunov指数时经常用到该方法(The procedure used to solve the time delay t and the embedding dimension m, the method is different from the self-correlation function gp method can solve the two quantities t and the value of m, the very aspect, often used to solve the lyapunov exponentthe method )

Used on cellular phones to filter out background noise. Measure the signal to noise ratio of an audio input in realtime. Pass speech but give silence where the input is noise (hiss, snap crackle and pop). Includes a tutorial on how to use statistics (correlation coefficient) to calculate the signal to noise ratio. Realtime implementation using Texas Instruments TMS320C5510 DSK and TMS320C6713 DSK. Code mostly in C, except where it would be too slow and assembly language is used.

说明：  使用matlab仿真自适应光学系统，包括变形镜，哈特曼传感器等，有详细的使用说明，是英文的(Matlab is used to simulate adaptive optics system, including deformable mirror, Hartmann sensor, etc)

function [ret,x0,str,ts,xts]=s4(t,x,u,flag) s4 is the M-file description of the SIMULINK system named s4. The block-diagram can be displayed by typing: s4. SYS=s4(T,X,U,FLAG) returns depending on FLAG certain system values given time point, T, current state vector, X, and input vector, U. FLAG is used to indicate the type of output to be returned in SYS.

随机改变一个矩阵的行的顺序生成新矩阵 保持数据不变(Randomly changing the rows of a matrix to generate a new matrix)

说明：  针对Hénon map,找出其稳定点，. 以及在参数确定的情况下绘画出其分岔图，计算李雅普诺夫指数，最后做出时域图 (For Hénon map,1) Find the fixed points of periods one and two for the Hénon map. 2) Investigate the bifurcation diagrams for the Hénon map by plotting the x_n values as a function of α for β = 0.4. 3) Write a Matlab or Maple program to compute the Lyapunov exponents of the Hénon map where α=1.2 and β = 0.4. 4) Use the OGY algorithm to stabilize a point of period one in the Hénon map where α=1.2 and β = 0.4.)

视频图像的滤波，算法比较简单，可以有效的滤除掉图像的高斯噪声、椒盐噪声(Video image filtering algorithm is relatively simple, and can be eliminated effectively image Gaussian noise, salt and pepper noise)

包含Jacobi和Seidel两种迭代法，用于求解线性方程，计算简单，收敛快(Contains two kinds of Jacobi and Seidel iterative method for solving linear equations, computing simple, fast convergence)

矩阵联合对角化的ARD算法。超级经典。超级简单。超级好用。(ARD lization of the matrix algorithm. Super classic. Super simple. Super easy to use.)