cs_exam

function Px = per(x,n1,n2) PER Estimate the spectrum of a process using the periodogram ----------- USAGE Px = per(x,n1,n2) The spectrum of a process x is estimated using the periodogram. x : input sequence n1 : starting index, x(n1) n2 : ending index, x(n2) The periodogram is returned in Px using a linear scale. If n1 and n2 are not specified the periodogram of the entire sequence is computed.

audio watermarking embeddin , use algorithm DCT DWT

fdtd 在自由空间没有吸收边界的情况下的代码(1D FDTD simulation in free space Without Absorbing Boundary Condition )

可靠度的快速算法 强度分布 指数分布 应力分布 正态分布(Reliability of the fast algorithm exponential intensity distribution normal stress distribution)

网友自编，支持向量机matlab源程序,通用于各类核函数(Netizen wrote, support vector machine matlab source)

用Canny算子检测图像的边缘 P0404：图像的阈值分割 P0405：用水线阈值法分割图像 P0406：对矩阵进行四叉树分解 P0407：将图像分为文字和非文字的两个类别 P0408：形态学梯度检测二值图像的边缘 P0409：形态学实例——从PCB图像中删除所有电流线，仅保留芯片对象(with Canny operator to detect the edges in the image P0404 : image thresholding segmentation P0405 : water line threshold method image segmentation P0406 : matrix Quadtree P0407 : images into text and non-text of the two categories P0408 : morphological gradient detection Binary Image Edge P0409 : morphology example-- Images from the PCB to delete all current lines, retaining only chip targets)

Welch法功率谱密度估计 改进的平均周期图法来求取随机信号功率谱密度估计的Welch法。(Welch method of power spectral density estimates to improve the average periodogram to strike a random signal power spectral density estimation method of Welch.)

计算原图像在阈值为s时均值的matlab源代码 (Calculation of the original image when the threshold value s mean matlab source code)

说明：  只是 Torr 的3D 重建工具箱，里面有细致的MATLAB代码与PDF说明文档，很好用(Torr is the 3D reconstruction of the toolbox, which has detailed MATLAB code and PDF documentation, good use)

说明：  这里有2组图，“1000.0.05”这一组是运行结果比较好的一组图，但是当时修改了时间间隔而没有改坐标说明，所以db1000.0.05.fig这幅图的坐标说明后来做了人工改正（应该是“time(0～250ms分成5000组,步长0.05ms”）。(Reuters, "1000.0.05" This group is running a relatively good results Reuters. But then amended the time interval and not changed coordinates Note So db1000.0.05.fig site map coordinates statement later became the artificial correction (should be "ti me (0 ~ 250ms group into 5000, 0.05 Step ").)