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说明：  《Matlab从入门到精通》所有的源程序。(《Matlab from entry to the master》 all of source code.)

说明：  To find the encryption and decryption of image which is affected by the noise.

This paper presents a new algorithm to extract the fetal ECG from an ECG recorded on the mother’s abdomen. The algorithm consists of two steps: first, ECG of fetus is extracted from the original signal using a two-level wavelet transform. We use Daubechie wavelet transform, which is similar in shape to heart beat wave. The resulted signal is then low-pass filtered using the Savitzky-Golay smoothing filter to attenuate the effect of noise. The filtered signal is considered as the fetal ECG. The algorithm was applied on both synthetic and real ECG signals. The results in this paper show that the proposed algorithm has promising performance.

用matlab 做的图像畸变校正源程序.主程序主要是做了一个图像处理的界面，并且实现图像的几何畸变校正，颜色畸变校正和图像模糊处理。外加几个子程序(Using matlab to do image distortion correction source main program is an image processing interface and image geometric distortion correction, color distortion correction and image blur processing. Plus several subroutines)

基于压缩感知的关联成像程序，计算鬼成像，过完备稀疏表示(Based on compressed sensing imaging procedures associated with calculating ghost imaging, over-complete sparse representation)

这次是添加不同密度的高斯噪声，和上次可做对比。(This is to add Gaussian noise of different densities, and the last to do comparison.)

基于NCD优化的非线性优化PID控制 （非线性系统的PID鲁棒控制）(NCD-based optimization of nonlinear optimization PID control (PID Robust Control of Nonlinear Systems))

图形旋转的matlab程序，可以进行任意角度的旋转 请参看(Graphic rotation matlab program, can be at any angle of rotation see)

电磁场仿真软件feko的模型文件，该文件为人体，对于仿真电磁场对于人体的影响有很大的作用。(The model file of the electromagnetic field simulation software FEKO, which is the human body, has a great effect on the human body.)

高阶谱分析工具箱，适用于阵列信号处理、雷达信号处理等。(High-order spectral analysis toolbox for array signal processing, radar signal processing.)