grav_nonlinear

此代码为基于遗传算法摩擦模型参数辨识的PID控制MATLAB仿真代码(This code is based on genetic algorithm for parameter identification of friction model simulation of PID control of MATLAB code)

本程序为粒子算法找最小值，很有启发意义，大家可以借鉴下(This program is to find the minimum particle algorithm, very instructive, we can learn from the next)

说明：  样本的互相关函数与互协方差的估计值计算 (samples of the cross-correlation function and covariance among the estimated value)

在matlab实现leach协议，及对其的一些节能改进(leach in matlab)

说明：  Leslie模型实例：基于Leslie矩阵的算法，同时将人口按10年一组分成m个年龄段，并根据一些影响人口数量和结构的重要因素（建立模型。再根据我国近十年的二孩出生率的实际情况并结合少数民族不受影响的因素，通过Matlab画出拟合曲线对2017-2030年我国每年人口总数做出预测。此后，根据近十年0-14岁、15-64 岁、65岁及以上三个年龄段的人数，计算出人口抚养比，用Matlab预测至2030年的人口结构。为了使预测更加精确，我们还将夫妇的生育意愿考虑到模型当中。(Based on the Leslie matrix algorithm, the population is divided into m age groups according to a group of 10 years, and according to some important factors that affect population size and structure Modeling. Then according to the actual situation of the birth rate of second-born children in China in the past ten years and combining the factors that are not affected by ethnic minorities, drawing a fitting curve through Matlab will make a prediction for the total population of China in 2017-2030. After that, based on the number of people aged 0-14, 15-64, and 65 years of age in the last ten years, calculate the dependency ratio of the population and use Matlab to predict the population structure by 2030. In order to make the prediction more accurate, we also consider the couple's fertility intention in the model.)

说明：  这是一个在MATLAB环境下的支持向量机的源代码，是大家学习SVM很好的例子(This is an environment in MATLAB support vector machine source code, is a good example of people learning SVM)

NPC inverter with pwm

这个文件中包含了一些信息利用小波的图像重建(this file contains some information about image reconstruction by using wavelet)

均匀光栅C++仿真程序，传输矩阵法，方便学习(Uniform grating matlab simulation program, transfer matrix method)

说明：  matlab 的非线性方程组求解多种方法得源程序(Solving nonlinear equations )