s_power_spectrum

此代码是基于DCT的数字水印MATLAB编程，包括水印的置乱和反置乱，嵌入以及提取水印四个部分(This code is based on digital watermark DCT MATLAB programming, including the watermark scrambling scrambling and anti-, four-part watermark embedding and extraction)

same file contents as the priviously three already uploaded files

simulink for pid with state space

双电机伺服系统同步控制算法simulink仿真。滑模控制。(Double synchronous motor servo system control algorithm simulink simulation. Sliding mode control.)

说明：  这是四旋翼飞行器姿态飞行的matlab程序代码，内涵simulink程序，(tihis is matlab of airport,which have four wing.it can help you creat result.)

TDC-GP22时间数字转换器临时数据手册(TDC-GP22 Time-digital converter temporary data sheet)

这5个小程序分别为：用Monte Carlo随机法圆柱相交体的体积；用刘徽割圆法计算pi；梯形法.辛普森法计算圆周率；蒲丰掷针实验程序；线性函数的迭代(This five small programs were: using Monte Carlo random method cylinder intersects the volume cyclotomic method with Liu Hui pi trapezoidal method Simpson method to calculate pi Buffon throw needles experimental procedures linear function of iteration)

清华大学信号课程第二次实验，内容是基于傅立叶级数的信号分解以及双音频按键音合成(Tsinghua signal course the second experiment, the content is based on the Fourier series of two-tone signal decomposition and synthesis of key tone)

这个是Raman放大的简单程序，使用的是MATLAB自带的ODE45函数。(This is a simple program Raman zoom, using the MATLAB comes with ODE45 function)

FDTD（时域有限差分法）算法的Matlab源程序(FDTD (FDTD) algorithm Matlab source code)