DFT

用PCA在一组数维中找到主十得到主元分析，用于MACHINE LEARNING 中初步学习者(use pca find the principle component int the dataset)

第15章 常微分方程的初值问题.zip。是从书中光盘里直接拷贝的代码，放在这里，与大家共享，共同交流，希望对大家有帮助。(Chapter 15 of the ordinary differential equation initial value problem)

将状态矢量转换成轨道根数的Matlab源程序，输入是位置速度矢量，输出是轨道根数，有详细的注解(Convert the state vector of the orbital elements of the Matlab source code, enter the location of the velocity vector, the output of the orbital elements, with detailed comments)

聚类算法，不是分类算法。分类算法是给一个数据，然后判断这个数据属于已分好的类中的具体哪一类。聚类算法是给一大堆原始数据，然后通过算法将其中具有相似特征的数据聚为一类。这里的k-means聚类，是事先给出原始数据所含的类数，然后将含有相似特征的数据聚为一个类中。所有资料中还是Andrew Ng介绍的明白。首先给出原始数据{x1,x2,...,xn}，这些数据没有被标记的。初始化k个随机数据u1,u2,...,uk。这些xn和uk都是向量。根据下面两个公式迭代就能求出最终所有的u,这些u就是最终所有类的中心位置。(Clustering algorithm, not a classification algorithm. Classification algorithm is to give a figure, and then determine the data belonging to a specific class of good which category. Clustering algorithm is to give a lot of raw data, and then through the algorithm which has similar characteristics data together as a class. Here k-means clustering, is given in advance the number of classes contained in the raw data, then the data contain similar characteristics together as a class. All information presented in or Andrew Ng understand. Firstly, raw data {x1, x2, ..., xn}, the data is not labeled. K random initialization data u1, u2, ..., uk. These are the vectors xn and uk. According to the following two formulas can be obtained final iteration all u, u is the ultimate all these classes the center position.)

经典的视觉显著性算法BMS的Matlab代码。(The classic visual saliency BMS algorithm Matlab code.)

Polarization of light beam in Optics Fiber

论述了BPSK、QPSK、16QAM、2FSK 调制和解调基本原理，以及各种调制方式的在AWGN 信道和平坦Raleigh 信道下的误码性能。同时介绍了OFDM 的调制解调原理。并使用MATLAB编写程序，对其进行了实验仿真。(It discusses the BPSK, QPSK, 16QAM, 2FSK basic principles of modulation and demodulation, and various modulation error performance in AWGN channel and flat Raleigh channel. Also introduces the principle of OFDM modulation and demodulation. Using MATLAB programming, simulation experiment was carried out.)

模型预测控制代码，运用模型优化输入，达到最优控制(This program implements a controller that uses a planning strategy for the surge tank example.)

说明：  求三角对角方程组Tx=f的解，其中T=[1 1 0 0 0,1 2 1 0 0,1 1 3 1 0,0 0 1 4 1, 0 0 0 1 5],x =[x1,x2,x3，...x5],f=[3,8,15,24,29](Diagonal triangle demand equations Tx = f the solution, in which T = [1 1 0 0 0,1 2 1 0 0,1 1 3 1 0,0 0 1 4 1, 0 0 0 1 5], x = [ x1, x2, x3, ... x5], f = [3,8,15,24,29])

此程序通过使用MATLAB——GUI实现常规计算器功能，包括正常算术运算以及开根号x的y次方等功能(This program by using MATLAB- GUI implement routine calculator functions, including normal arithmetic operations and square root functions x to the power of y)