Duffing-equation

余弦波是渐变的，当ωt+φ的取值变化量很小时，Y的变化量也是很微小的。余弦波的这一特性保证了嵌入水印后相邻字符灰度值差别不大，人眼无法识别，从而保证了水印的不可见性和图像质量。(Cosine wave is gradual, and when ωt+ φ values variation is very small, Y amount of change is very small. Cosine waves This feature ensures that watermarked gray value of adjacent character is not very different, the human eye does not recognize, thus ensuring the invisibility of watermark and image quality.)

用MATLAB M语言实现平均电流模式控制的PFC数学模型。运行该程序后可看到电流，电压波形。(Using MATLAB M language to achieve an average current-mode PFC control, mathematical model. After running the program to see current and voltage waveforms. )

simulation of a channel using BPSK and QPSK

时间序列自回归分析的matlab代码，根据之前的数据来预测后面数据的变化趋势。(Autoregressive time series analysis of matlab code, to predict the variation tendency of the back data according to the data before.)

Being able to place a lower bound on the variance of any unbiased estimator is very useful

music自适应算法估计来波方向matlab 代码实现(music DOA estimation adaptive algorithm matlab code)

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mean square error calculation

DSB双边带调制的systemview仿真系统(DSB double sideband modulation simulation system systemview)

Virtual Reality and animation for MATLAB and Simulink Users: Visualization of Dynamic Models and Control Simulations. this book Gives the reader hands on example- experience for simulating dynamical models in MATLAB® /Simulink and animating them in VRML