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我现在主要研究的是非负矩阵在特征提取方面的工作，上传几个我阅读的外国文献的，书籍源代码，在代码中有相应的文献或综述。我就上传一个low rank NMF的。压缩包里有9个文件。(I now mainly studied non-negative matrix feature extraction work, and upload a few I read foreign literature, books source code, there is a corresponding review of the literature or in the code. I' ll upload a low rank NMF' s. Compression bag has nine files.)

说明：  最短路径问题的重要算法实现。已知点的邻接矩阵，可计算出出发点至目标点的最短路径即最短路径长度(The important algorithm implementation of the shortest path problem. Given the adjacency matrix of points, the shortest path length from the starting point to the target point can be calculated)

用来测试手机待机情况下所能使用的最大内存量，普通用函数调用得到的剩于内存是错误的，这个通过用INT占用内存来获得可以使用的内存真正空间大小(Used to test mobile phone standby cases the maximum amount of memory can be used by the general use function calls get left in the memory is wrong, it occupied by the memory by using INT can be used to obtain the real memory space)

我自己写了一个函数： 该函数用来计算任意函数的一阶偏导数(数值方法) (I wrote a function: The function used to calculate the arbitrary function of the first-order partial derivative (numerical methods))

说明：  实现基频提取的RAPT算法（一种鲁棒性的基频提取算法）。输入文件为wav波形文件。(A Robust Algorithm for Pitch Tracking (RAPT))

Prewitt edge detection

通过编程计算可得恢复后图像与原始图像的归一化均方误差为：(By programming available to restore the original image after the image and normalized mean square error:)

最优化FIR数字带通滤波器的设计，用来对加速度信号进行带通滤波，提取运动信息。(the design of an optimal FIR digital band-pass filter.)

计算自然样条曲线的MATLAB程序 输入的量X和Y分别是由节点（x_i,y_i）（i=0,1,2,...,n）的横坐标和纵坐标组成的向量。(A Matlab program for calculate natural spline)

提取振动信号中峭度等特征参数，并运用K均值聚类进行聚类分析(Extract vibration signal characteristic parameters such as kurtosis, and the use of K-means clustering clustering analysis)