usefulcode6

improved Neighblock wavelet thresholding method based on minimising SURE criterion

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")

这种小波构造方式适合于各种DB系列的小波，但面对db6等比较长的小波，则均衡器的权长要足够长(Wavelet way that is suitable for a variety of wavelet DB series, but in the face of such a long db6 wavelet, it' s the right balance should be sufficiently long length)

说明：  自己编制的傅立叶反变换MATLAB程序，有详细的注释，方便大家理解傅立叶反变换的意义。(Prepared by the Fourier inverse transform their own MATLAB programs, with detailed notes, to facilitate us to understand the significance of the Fourier inverse transform.)

fast smoothing of noise images

英文文本处理，去掉停用词，提取词干，提取文本特征向量(English text processing, removing stop words, stem extract, extract text feature vectors)

icp(iterative closest point)的代码，本人已经使用过了，效果还行,总共就一个文件，所有的函数都写在这上面了(icp (iterative closest point) of the code, I have used, and the results were OK, total on a file, all of the functions are written in it.)

matlab空间面板模型的最后结果包括各变量的系数，拟和度(MATLAB SPTATIAL PANAL MODEL)

遗传算法的matlab实现代码，已验证无错误(Genetic algorithm matlab code, verified error)

提取Gabor特征，LBP特征，LGBP特征代码(extract Gabor feature,LBP feature and LGBP feature.)