butterworth

说明：  计算循环卷积，DFT，IDFT,FFT... .. (Computing cyclic convolution, DFT, IDFT, FFT ... ..)

说明：  SVM用于模式识别 整理别人的代码（原来的是英文）所得： kernel.m用于内积矩阵的计算 svcplot.m用于绘图 svm168.m是主程序 testlin.m是采用线形内积函数的支持向量机应用的 文件 testrbf.m是采用RBF内积函数的支持向量机应用 的 文件 每个文件中都有说明。 仿真平台matlab7.0, 仿真全部通过 将所有文件拷贝到work目录下（注意不要直接将上层文件夹直接拷贝到work目录下，若那样操作，必须在matlab的file菜单中的set path中设置相应的路径）。 打开matlab，在命令窗口中输入 testlin或testrbf 即可查看结果。 (SVM pattern recognition for collating other people's code (the original is in English) from : kernel.m plot within the matrix for the calculation svcplot.m for graphics is the main svm168.m testlin.m procedure is used linear plot function within the SVM application documents testrbf.m RBF is using plot function within the SVM applications each file documents were described. Matlab7.0 simulation platform, all through the simulation of all the documents copied to the work directory (not directly to the attention of the upper folder directly copied to w contex directory, as if the operation, Matlab in the file menu on the set path corresponding set the path). Open Matlab, in the command window or imported testlin testrbf can see the results.)

THE SYNTAX OF A PROGRAMMING LANGUAGE tells you what code it is possible to write—what the machine will understand. Style tells you what you ought to write— what the humans reading the code will understand. Code written with a consistent, simple style will be maintainable, robust, and contain fewer bugs. Code written with no regard to style will contain more bugs. It may simply be thrown away and rewritten rather than maintained.(var OF THE PROGRAMMING LANGUAGE tells A. you what code it is possible to write-what the ma chine will understand. Style tells you what you ought to write-what the humans reading the code will understand. Code written with a consisten t, simple style will be maintainable, and robust. and contain fewer bugs. Code written with no reg ard to style will contain more bugs. It may simpl y be thrown away and rewritten rather than maint ained.)

标准粒子群算法程序，函数优化，参数优化，可用于PIDNN.(Standard PSO procedure, function optimization, parameter optimization, can be used to PIDNN.)

说明：  心电图基本知识介绍，发明历史，目前应用和重要技术，是医学和电子医疗从业者的入门知识(Introduction of basic knowledge of ECG, invention history, current applications and important technology, medicine and electronic medical practitioners introductory knowledge)

qpsk位同步源程序 包括调制解调及信道加噪等(qpsk bit synchronization source, including modulation and demodulation and channel plus noise, etc.)

DDS的原理及matlab实现。文中分析了理想状态下和有误差状态下模型，并给出源代码。(the realization of DDS by matlab)

说明：  多种复杂网络的仿真代码，小世界网络，无标度网络等等(Simulation code of multiple complex networks)

关于MATLAB程序设计的PPT教程，大家一起交流。(On MATLAB programming tutorial PPT, with U.S. exchanges.)

使用ziegler方法，对PID控制器进行PID整定。(Using Ziegler method, the PID controller is tuned.)