Numerical

粒子群优化算法（PSO）研究 粒子群优化算法（PSO）研究(PSO Particle Swarm Optimization Algorithm)

说明：  通过MONTE CARLO仿真说明DS扩频信号在抑制正弦干扰方面的有效性(MONTE CARLO simulation shows through the DS spread spectrum signal is sinusoidal interference suppression in the effectiveness of)

说明：  CRC校验的Matlab仿真，也可以认为是二进制除法。(CRC checksum of the Matlab simulation, it can be regarded as a binary division.)

the fourier serial: how to do with fourier

用于统计任一英文文档中26个字母的统计频率，得到频率矩阵(Second, it fuses the features of the first singular value component and the second one, and then gets the complex feature vectors which reflect not only the statistic frequency but also the sequential structure of letters. In the end, the cosine similarity of texts is used to measure the similarity between the query and documents.)

整个SVM工具包 全部软件及调用的dll问价，内附说明用法(SVM toolｂｏｘ )

BP神经网络算法matlab实现和matlab工具箱使用实例(BP neural network algorithm matlab matlab toolbox to implement and use cases)

RF Circuit design mfiles

A new method for periodic scattering problems using 2nd kind boundary integral equations and the free-space Green s function, adding extra degrees of freedom on the unit cell walls, and imposing quasi-periodicity in an expanded linear system.(A new method for periodic scattering problems using 2nd kind boundary integral equations and the free-space Green s function, adding extra degrees of freedom on the unit cell walls, and imposing quasi-periodicity in an expanded linear system. This avoids the problems with the standard approach, namely: the quasi-periodic Green s function is slow to evaluate, it diverges at Wood s anomalies, and it does not handle large aspect ratios well. Our new approach cures all three issues, and can easily be `wrapped around an existing code (e.g. fast-multipole acceleration) for the isolated-obstacle scattering problem. It includes the latest talk slides: "A new integral representation for quasi-periodic scattering problems in two dimensions")

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