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1. 608组样本，第一列数字是标号，第二列数字是出现损坏的时间，第三列表示数据有效性，为0有效 2. 损坏时间是对数正态分布的，需要拟合 3. 求均值80%置信区间 4. 成本为m，价格为s，保证盈利20%，选取保修期 5. 比较保修期和拟合数据的均值 6. 若保修期就是拟合损坏时间的均值，求出利润率 loadd.m：加载样本数据，并选取有效数据 period.m：加载成本、价格数据，计算利润和保修期的关系(1.608 groups of samples, the first number is the label, the second column number is the time to appear damage, the third list shows the validity of the data, which is 0 effective. 2. damage times are logarithmic normal distribution and need to be fitted 3. mean in 80% confidence interval 4. the cost is m, the price is s, the profit is 20%, the warranty period is selected. 5. compare the mean value of the warranty period and the fitting data 6. if the warranty period is to fit the mean damage time, the profit rate is calculated. Loadd.m: load the sample data and select the valid data Period.m: loading cost, price data, and calculating the relationship between profit and warranty period)

matlab lms code whaich is used for echo cancellation

使用matlab书籍，简单易学，对初学者来说是很不错的一本书(a book for matlab user. It is simple to understand and easy to get into using it.)

CVX的使用方法 它是一种很有用的MATLAB设计工具(CVX to use it is a very useful design tool MATLAB)

详细说明了14节点的潮流计算方法以及网损的计算(The calculation method of 14-node power flow and the calculation of net loss are described in detail)

该matlab代码描写的是波束成形算法中的Capon算法的具体实现(The matlab code describing the concrete implementation of the Capon beamforming algorithm algorithm)

遗传算法GA—模拟自然界遗传机制和生物进化论而成的一种并行随机搜索最优化方法。（具有“生存+检测”的迭代过程的搜索算法）基于自然界“优胜劣汰，适者生存”的生物进化原理引入优化参数形成的编码串联群体中，按照所选择的适应度函数并通过遗传中的选择、交叉和变异对个体进行筛选，使适应度值好的个体被保留，适应度差的个体被淘汰，新的群体既继承了上一代的信息，又优于上一代。反复循环，直至满足条件。(GA-A parallel random search optimization method that simulates natural genetic mechanisms and biological evolution. (Search algorithm with "survival + detection" iterative process) Based on the biological evolution principle of "survival of the fittest, survival of the fittest" in the natural world, the coding series formed by optimized parameters is introduced. Individuals are screened according to the selected fitness function and through genetic selection, crossover, and variation, so that individuals with good fitness values are retained, individuals with poor adaptability are eliminated, and new groups inherit the information of the previous generation., Better than the last generation. Repeat until conditions are met.)

SPWM和SVPWM模型 已经经过调试可用参数可设(SPWM and SVPWM model has been used to debug parameters can be set up)

采用MATLAB对常见插值 和拟合算法进行变成，并附有PPT文档说明(Using MATLAB and the fitting of the common interpolation algorithms become, along with documentation PPT)

自然边界元方法理论知识，由余德浩教授编写，介绍了自然边界法在多种偏微分方层中应用。(Natural Boundary Element Method theoretical knowledge, written by Professor Yu Dehao introduces the natural boundary method in a variety of partial differential layer.)