lianxi

离散灰色的预测程序，利用最小二乘法预测数据(Discrete gray forecasting process, using least squares projections)

实用matlab教程，包括simulink,图形处理，GUI，数值计算等的详细说明(Practical Matlab tutorials, including a detailed description of the simulink, graphics processing, the GUI, numerical calculation, etc.)

基于雷达一维距离像的目标识别，采用最大相关系数算法，是最简单的基于HRRP的目标识别算法，适合新手。(Radar HRRP target recognition, the maximum correlation coefficient algorithm is based on the most simple HRRP target recognition algorithms, suitable for the novice.)

说明：  FR共轭梯度算法求极小值。y为给定函数，x为函数变量，x0为搜索起始点 返回值fm为极小值，xm为极小值点(FR conjugate gradient algorithm for the minimum. y for a given function, x as a function of variables, x0 the starting point for the search to return to the value of fm for the minimum, xm for the minimum point)

一维小波的分解和重构，可以运行，三层降维和重构，小波降噪。很实用(matlab wavelet)

sorce code for imageprooceesin with matlab code

灰色按扭激活--可以将一些软件限制的灰色按扭激活使用,比如某些软件普通会员会限制一些功能,有这个就可以解开限制(Gray button activation- can be some of the limitations of the gray button to activate the software to use, such as some software will limit some features of ordinary members, have this limit can be solved)

ＭＡＴＬＡＢ的ＳＳＢ－ＡＭ的解调程序，比较新颖的程序设计，非常简便和易懂(MATLAB-SSB-AM demodulation process, relatively new procedure for the design, very simple and easy-to-)

这里面有两个程序，两个都是采用4QAM调制。不过个人觉得第一个更容易懂，因为写的很有条理。我改的那个程序就是根据这个来的。 不过在这里面有个问题就是信道系数只能是由高到低，大家可以试试，改成[0.227 0.46 0.688 0.46 0.227]这个是老师给我的仿真中常用的信道系数，这个成为归一化信道，就是系数平方和为1. 第二个程序没有涉及到信道系数，但是这个程序当中，在128个子载波中，前后有32个空载波，这个在OFDM中也是经常用的，这样可以降低误码率。 (And there are two programs, two are based on 4QAM modulation. But personally feel that the first is easier, because the writing is organized. I changed that procedure is based on the past. However, there is a problem in that there is only channel coefficients from high to low, we can try and change into [0.227 0.46 0.688 0.46 0.227] This is the teacher gave me the simulation channel coefficient commonly used, this became normalized channel, is coefficient of the square and is 1. The second program is not related to channel coefficients, but this program which, in the 128 sub-carriers, the before and after the 32 air carriers, the in OFDM is also often used, which can reduce the error rate.)

用欧拉方法和龙格－库塔方法求微分方程数值解，画出解的图形，对结果进行比较分析。(using Euler method and RK method to solve the differential equations ,ploting the graph of the solution, compare and analyze the solutions)