spactral-analysis

说明：  蚁周算法的Matlab程序，可运行，图像可视化，但速度较慢(Matlab algorithm ants week program can be run, image visualization, but slower)

2阶3型锁相环仿真,完全个人编写，可设置参数，适合文章仿真使用。(2end order type-III PLL Simulation)

蚁群算法解决TSP问题，成功验证了。希望对大家有帮助。(Ant colony algorithm to solve TSP, successfully verified. Hope everyone has to help.)

Solving Non linear Schrodinger Equation in Optical Communication

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)

关于高阶累积量时延估计方法的研究，本代码描述的是三阶累积量，广义相关法，进行了两者性能相关的比较，最终能求得试验估计值，比较出两者的性能。(The cumulative amount of higher order time delay estimation method studies, the code describes the third-order cumulant, generalized correlation method were compared between the two performance-related, the final test estimate can be obtained, to compare the performance of both.)

说明：  光子晶体光纤中空气孔分布均匀时，计算光子晶体光纤的模式有效折射率(The effective RI of the mode propagating in PCF)

说明：  matlab 科学计算与可视化程序集。几百个小程序供初学者掌握matlab的科学计算十分有帮助。(matlab scientific computing and visualization of the assembly. Hundreds of small programs for beginners to master the scientific computing matlab very helpful.)

help file for matlab chm

wavelet programme for watermarking