utilities

树形曲线 迭代绘出类似树枝的曲线 第k次迭代产生节点数为nk，第k+1次迭代产生节点数为nk+1(shuxingquxian)

convolution of a signal

对简单闭环系统的PID控制参数进行优化，得到最佳的控制效果。使用时将该文件夹设为matlab默认文件夹，用simulink打开.mdl文件，在命令行窗口输入.txt文档中命令，可以得到优化后的P、I和D参数。(The PID control parameters of the simple closed-loop system are optimized to obtain the best control effect. With using these codes, the folder must be set as the default folder of matlab, then open the. MDL file, and input the commands of . TXT document in the command line window. The optimized P, I and D parameters will be obtained.)

交流调压电路所使用到的晶闸管相关型号和晶闸管选择原则，包括一些电路和MATLAB的仿真说明 (AC voltage regulation circuit of the thyristor used to select the relevant model and the principles of thyristor, including circuit and MATLAB simulation shows)

说明：  有n个整数，使其前面各数顺序向后移m个位置，最后m个数变成最前面的m个数 (Have n integers, to move back in front of the order m of the number of positions, finally becoming the foremost m m the number of number of)

语音合成PSOLA算法实现 语音合成PSOLA算法matlab实现(Speech synthesis psola algorithm achieve speech synthesis psola algorithm matlab )

用不同的方法来设计FIR数字滤波器,利用MATLAB来设计FIR数字滤波器.(Use different methods to design FIR digital filters, using MATLAB to design FIR digital filters.)

共生矩阵的实现及特征提取方法，里面包含了各个特征向量提取的子程序，可以在其他程序中直接调用。(co-occurrence matrix and the realization of feature extraction methods, each of which contains a feature vector extraction subroutine, the other procedures can be called directly.)

this file compute lagg on arrays

电力系统谐波监测相关的文章其中的fft和apfft之间的对比很有参考意义(Fft and apfft contrast between the power system harmonic monitoring related article which is very useful)