ExtractBackground

该文件里有一个关于DSP学习的MATLAB程序源代码，很实用(The file has a DSP to learn MATLAB on the program source code, very practical)

非线性控制的描述函数法，非常经典的书籍 适合于入门学习(Nonlinear Control describing function method, a very classic books suitable for beginners to learn)

碎纸片的拼接，简单的几张一行图片进行链接。(Torn pieces of mosaic)

说明：  这是一个短时傅里叶变换的程序，特别详细，超级好用(This is a short-time Fourier transform procedure, particularly detailed, super-easy)

论文 Least Squares Loss for Multi-class (task) Learning via the sparse group Lasso penalty 的算法源代码，是sparse+l1+lq,1的稀疏属性选择算法。( Least Squares Loss for Multi-class (task) Learning via the sparse group Lasso penalty Problem min 1/2 || A x- y||^2+ lambda_1* |x|_1+ lambda_2*|x|_{q,1} q=2, infty)

直升机气动系统参数辨识 (Helicopter pneumatic system parameter identification)

This book is about communication system by matlab.

说明：  电压型逆变器，学习逆变器的基本模型，适合入门的者 仿真软件matlab(Voltage-type inverter, inverter to learn the basic model, suitable for those who get into simulation software matlab)

moduation and demodulation process using GUI

说明：  bp神经网络预测模型，可以很好的进行训练集和测试集建模，实用方便(BP neural network prediction model can model training set and test set very well, which is practical and convenien)