lbmval

matlab的一些基础程序，可直接调用。收集很久的！(matlab some of the basis of procedures, can be directly called. Collection of long!)

这是接着上一次的一些大家很可能用到的聚类分析方法，有PCA等，希望能给大家一些帮助。(then this is the last time some people may use the cluster analysis method, PCA. I hope that it provides some help.)

全息图样的分数傅里叶变换原理和实验结果，用MATLAB实现(The fractional Fourier transform theory and experimental results of the holographic pattern, with MATLAB)

可以求出复杂网络中两节点间的距离以及平均路径长度，各节点的度及度的分布曲线，以及节点的聚类系数。(You can find out the distance and average path length between the two nodes in complex networks .you can also find out degree and degree distribution curve of each node, and the node clustering coefficient.)

matlab颜色模型转换的代码程序，数字图像处理的matlab程序代码(matlab code color model conversion program, digital image processing matlab code)

Function to implement Linear Discriminant Analysis Usage:- [Xnew,V,mX,D] = lda(X,index,mX) [V,D] = lda(X,index) where:- X = concatenated grand profile vectors (GPV) i = class index of each vector Xnew = new feature vectors P = eigen vectors mX = mean of GPV (optional in input) D = eigen values

逆变器Simulink下的通用模型，便于研究其动态特性(Inverter Simulink under the general model to facilitate the study of its dynamic characteristics)

说明：  已知三个信号 ，经调制产生信号 ，其中 为常数， 为具有窄带特性的Hanning信号。将此已调信号通过信道传输，描述该信道的差分方程为 得到接收信号 1）分析Hanning信号 的时域与频域特性 2）分析已调信号 的时域与频域特性 3）分析系统的单位脉冲响应 4）分析接收信号 的频谱 (Three known signal, the modulated signal is generated, which is a constant for the Hanning signal having a narrowband characteristics. This modulated signal channels transmitted through the differential equation of the channel 2) units of analysis of the modulated signal and frequency domain characteristics 3) analysis system is described for obtaining a reception signal 1) Analysis of time domain and frequency domain characteristics Hanning signal 4 impulse response) spectral analysis of the received signal)

In MATLAB, usually we use function bvp4c() to solve boundary value problem (BVP) of ODE. However, we also can use function ode45() to solve BVP of ODE too. However, ode45() needs all initial values at one point. Therefore we have to construct an auxiliary function, whose input argument is the missing initial value and the return output is the given boundary value, Then we can call function fsolve() to get the missing initial value. This method is particularly efficient it the ODE has one or more parameters. Also this method is essentilal for GNU Octave, because whose function bvp4c() is not programmed for parameter ODE yet.

时兴的前推回代算法程序，可用于求解辐射状配电网三相潮流。(Forward-Backward Sweep algorithm for three-phase load-flow analysis of radial distribution systems.)