average_centrality.m

nmf算法的一个简单代码实现，将一个矩阵分解成两个非负矩阵的乘积。(NMF algorithm a simple code realized, will a matrix is decomposed into two nonnegative matrices of the product. )

matlab的图论工具箱，基本够用了，大家试一试。(matlab toolbox graph theory, basic enough, please try.)

说明：  matlab动力学分析程序详解:一个用matlab进行动力学分析的程序例子(Detailed explanation of MATLAB dynamic analysis program)

一个报童从报刊发行中心订报后零售，每卖一份报纸可赚钱a元；若报纸卖不出去，则退回发行处，每退一份要赔钱b元。每天报童卖出的份数是随机的，但报童可以根据以往卖报情况统计得到每天卖k份报纸的概率密度p(k)。 （1） 求报童每天期望收益达到最大（或损失达到最小）的定报量z。 （2） 改变参数a/b的值，观察订报量的最优值变化，画出变化曲线。 试画出仿真流程图，进行程序实现，并对仿真结果进行分析。 (A newsboy subscribe from the press after the retail distribution centers, each sale of a newspaper can make money a million if newspapers can not be sold, then returned to Issue Department, each retire to a loss of a b element. Newsboy sold shares in a day is random, but the newsboy can sell based on past statistics reported to be selling daily newspaper k the probability density p (k). (1) seeking newsboy expected profit per day to maximize (or minimize loss) reported that the volume of fixed-z. (2) change the parameters a/b values, subscribe to observe changes in the volume of the optimal value, draw curve. Simulation test to draw a flow chart for program realization, and simulation results for analysis.)

Everything ROC and Precision-Recall curves.

Three phase distribution system line parameters measurements

说明：  本程序实现了短数据序列不同窗函数的welch功率谱估计，然后又求了他们的平均标准差，从而判断各个窗函数的优劣。只要稍作修改就能实现不同信噪比下的功率估计，同时也可以实现长数据序列的估计。(This procedure has a short data series of different welch window function power spectrum estimation, and then seek their average standard deviation, and thus to determine the merits and demerits of each window function. As long as we can with some slight modifications under different signal to noise ratio power estimate, but also the realization of a long data sequence can be estimated.)

说明：  对于初学者学习matlab很有帮助，尤其在图像处理方面更是很好的啊。(For beginners learn matlab &reg helpful, especially in the image processing is very good.)

cyclic prefix in ofdm

线性调频信号的正交解调及脉冲压缩处理技术在matlab中的实现(The chirp signal quadrature demodulation and pulse compression processing technology implemented in matlab)