原始RRT

MATHEMATICAL MODELS OF DISTRIBUTION CHANNELS 畸变信道数学模型。一本介绍畸变信道数学模型的外文书，对通信信道感兴趣的书友，可以看看。很好的一本英文书，一起分享。 (MATHEMATICAL MODELS OF DISTRIBUTION CHANNELS。A book about communication channel ,someone who is interest in DISTRIBUTION CHANNEL must have a look. It is really a good book,share with all of you. )

一个人脸识别系统，很好用。能够实现人脸的识别和检测。(A face recognition system, it just works. Able to achieve human face identification and testing.)

matlab编程必备，很实用的电子教程，是学习MATLAB的首选(MATLAB)

说明：  首先，建立两个模拟信号的数学模型 有用信号 干扰信号。两个信号的中心频率、信号带宽等参数由学生自己选定，要求两个信号的频谱不重叠 分别画出三个模拟信号的时域波形和频谱图；然后，根据x_a (t)的中心频率和带宽，按照奈奎斯特采样定理选择采样频率fs，分别对信号s_a1 (t)、s_a2 (t)、x_a (t)进行时域采样，得到离散信号s_1 (n)、s_2 (n)、x(n)。利用FFT算法分析离散信号的频谱，分别画出三个离散信号的时域波形和频谱图； 接着，设计数字滤波器H(z)，要求该滤波器对干扰信号s_2 (n)的衰减大于40dB。提出滤波器的设计指标，并设计滤波器，给出滤波器的设计结果，绘制滤波器的幅频特性和相频特性曲线，验证滤波器的设计结果是否达到设计指标要求；此外，选择实现数字滤波器H(z)的结构，画出滤波器结构信号流图；然后，将合成信号x(n)输入数字滤波器H(z)，按照所选择的滤波器结构，设计计算机程序计算滤波器的输出响应y(n)，画出y(n)的时域波形和频谱图；(the synthetic signal x (n) is input into the digital filter H (z). According to the selected filter structure, a computer program is designed to calculate the output response y (n) of the filter, and the time-domain waveform and spectrum diagram of Y (n) are drawn)

控制工具箱与SIMULINK软件应用：系统对象为G(s)=4/s(s+2) PI补偿器K1(s)=(s+1)/s K2(s)=(s+0.5)/s a 若由K1(s)与 G(s)串联组成的单位反馈系统，称为系统A。 b 若由K1(s) 放置在G(s)的反馈通道称为系统B。 c 若由K2(s)与G(s)串联组成的单位称为系统C，绘制上述每一种情况的阶跃响应与斜坡响应，求每一种情况下的系统阶跃响应误差与斜坡响应误差，并与理论分析结果进行比较。 (Control toolbox and SIMULINK software application: system object for G (s) = 4/s (s+ 2) PI compensator K1 (s) = (s+ 1)/s K2 (s) = (s+ 0.5)/s If a by K1 (s) and G (s) series of feedback system of the unit, known as a system a. B if the K1 (s) placed in G (s) feedback channel called system b. If c by K2 (s) and G (s) series of unit is called system c, draw the above each kind of condition of step response and slope response, for each of these cases system step response error and slope response error, and the results were compared with theoretical analysis.)

This Filter provides a selective mean (averaging) lter. In contrast to the standard mean lter,it preserves edges better and is less sensitive to outliers(outliers are those that are not included in the measurement taking place.In this case averaging). The lter smooths an image by taking an average over the neighbouring pixels, but only includes those pixels that have a value not deviating from the current pixel by more than a given range. The range is dened by the standard deviation of the pixel values within the neighbourhood . If the number of pixels in this range is too low (less than `Minimum Pixel Fraction ), averaging over all neighbouring pixels is performed.With the `Outlier Aware option, averaging over all neighbouring pixels excludes the center pixel.

实现:实指数、复指数、不同长度序列求和、y(n)=x(-n)、y(n)=x(n-k)(realization : real indices Minute index, different length sequences for peace, y (n) = x (-n), y (n) = x (n-k))

说明：  利用递归迭代法构造多小波基的matlab源码及实现多小波分解2-D图像(Recursive iterative method to construct multi-wavelet basis matlab source code and to achieve more than 2-D image wavelet decomposition)

一种谱估计的算法，大家可以借鉴下，并且共同讨论下，是matlab编写的(a spectral estimation algorithm, we can draw on, and discuss, it is prepared by the Matlab)

Matlab环境下，AVI影片帧转成BMP图像的算法。( Convert AVI movie to BMP frame algorithm in Matlab environment.)