PSO改进粒子群算法优化BP神经网络的权值，建立BP神经网络

hmm toolbox for image processing

this is a file pdf for photonic crystal fibers

我们编的MATLAB程序，实现了用最短路算法求最短路径。这是我们在学校国际赛模拟题做的东西，相信对数模很有用。(We compiled MATLAB program, using the shortest path algorithm to achieve the shortest path. This is our international competition simulation title in the school do something, I believe the number of modules useful.)

Low density parity code

是MATLAB中常用的函数，非常适合初学者，对于工程师研究人员等也可作为手册来查(MATLAB function is commonly used, is suitable for beginners, for engineers, researchers, etc. may also be a manual check)

这是一个HDB3码型转换的GUI程序，可以实现对任意输入的序列进行AMI hdb3的编码解码的波形输出。(This is a converter of the HDB3 code GUI program can be achieved for any input sequence AMI hdb3 coding and decoding of the waveform output.)

说明：  这是一本关于系统辨识很好的书本，对初学者很有帮助，是由我们学校长江学者编著的，外面都没有，拿出来分享(This is a very good book on system identification, very helpful for beginners, is edited by our school Changjiang Scholars, and the outside did not work out to share)

模式聚类常用算法，包括k均值，模糊算法，PCA算法等。(Clustering Toolbox，including k-means clustering dcEMGMM - fits a Gaussian mixture model to data dcFuzzy fuzzy c-means clustering dcAggagglomerative (hierarchical) clustering DoClustering call the above routines)

matlab最速下降法，简单的求二次函数的hesse矩阵(steep decent method)

fourier transform and MATLAB