标准的深度优先搜索算法，可实现节点遍历、产生随机路由、检测图中是否有回路等功能，-Standard depth-first search algorithm, the node traversal can be achieved, resulting in a random routing, testing whether there is any loop diagram functions

应用MATLAB的M文件编程方法过行信号频域分析。分别用矩阵运算的方法计算方波的DFS，在60的时窗宽度上方波宽度分别为5与12。并且画出x(n)和DFS(x(n))的杆状图。-Application of MATLAB M-file programming off-line signal frequency domain analysis. Were calculated using matrix calculation of square wave of DFS, in the 60'