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dct变换的MATLAB实现，供大家学者参考(dct transform MATLAB realization of reference for all scholars)

滑模变结构控制的基础理论，很适合初学者使用和学习(The sliding mode variable structure control of the basic theory, it is suitable for beginners to use and learn)

接地技术最早是应用在强电系统（电力系统、输变电设备、电气设备）中，为了设备和人身的安全，将接地线直接接在大地上。由于大地的电容非常大，一般情况下可以将大地的电位视为零电位。后来，接地技术延伸应用到弱电系统中。对于电力电子设备将接地线直接接在大地上或者接在一个作为参考电位的导体上，当电流通过该参考电位时，不应产生电压降。然而由于不合理的接地，反而会引入了电磁干扰，比如共地线干扰、地环路干扰等，从而导致电力电子设备工作不正常。可见，接地技术是电力电子设备电磁兼容技术的重要内容之一，有必要对接地技术进行详细探讨。(Grounding technology was first applied in strong electric system (power system, power transmission equipment, electrical equipment), in order to equipment and personal safety, the ground wire directly connected to the earth. Because the earth capacitance is very large, under normal circumstances can be considered to be zero potential earth potential. Later, grounding techniques applied to extend the weak system. For power electronic devices directly connected to the ground wire on the ground or connected to a reference potential as a conductor, when the current through the reference potential, and should not generate voltage drop. However, due to unreasonable ground, but will the introduction of electromagnetic interference, such as co-ground interference, ground loop interference, resulting in power electronic equipment is not working properly. Visible, grounding technology is an important part of power electronic equipment EMC technology, it is necessary for grounding techniques disc)

用于ocr图片字母提取的matlab代码，完全自己研究的(Ocr picture letters for extraction matlab code, complete theirself studies)

half band filter code

优化程序，包括最短路径，最小生成树等。具体说明可以参考content文件 (optimization procedures, including the shortest path, minimum spanning tree, and so on. Specify reference document content)

在工具箱LS_SVMlab用支持向量机用于函数拟合，带有注释(Toolbox LS_SVMlab used in support vector machine for function fitting, with Notes)

说明：  遗传工具箱类构造函数。分为染色体类构造函数。一般基类的构造根 ，对于连续型设计变量的数据提取的构造。得到的染色体设置属性(Genetic toolbox class constructor. Divided into the chromosome class constructor. The general structure of the root base class for the continuous design variables of the structure of data extraction. Have set the properties of chromosomes)

This is a matlab simulink for PWM producing

故障诊断方面的。在电力传输线上的。讲解详细，逻辑性强，有利于仿真创新(Fault diagnostics. In the power transmission line. Explain in detail, logical, beneficial simulation innovation)