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Mathmatics matlab source

基于时间序列模型的一阶滤波程序，没有解压密码，直接使用(time series model based on the filtering process an order, without extracting passwords used directly)

一种基于奇异值分解的数字水印技术，这是一篇很经典的文章，再此文章之后，基于svd的水印技术大量出现(a digital watermarking technologybased on Singular value decomposition , which is a classic article, and then, after this article, the watermarking technique based on large numbers of svd)

在Matlab中实现了Cordic快速算法，并实现了sin(x), cos(x), atan(y/x), sqrt(x^2+y^2)等函数的快速计算，并附加了误差分析的结果图，代码清晰简洁，对Cordic算法的迭代次数确定，有一定的指导意义(Cordic implemented in Matlab fast algorithm, and realized sin (x), quickly calculate cos (x), atan (y/x), sqrt (x ^ 2+y ^ 2) and other functions, and attach the results of the error analysis Figure, clear concise code, Cordic algorithm for determining the number of iterations, there are certain guiding significance)

用matlab检测视网膜眼底图像，达到自动识别视网膜病变(Detection of retinal fundus images using matlab to achieve automatic identification retinopathy)

设计一种快跳频通信系统，仿真其中的序列和性能，并给出系统框图。(Design of a fast frequency-hopping communication systems, simulation and performance of the sequence, and gives the system diagram.)

orthogonal variable spreading factor (OVSF) is an implementation of Code division multiple access (CDMA) where before each signal is transmitted, the spectrum is spread through the use of a user s code. User s codes are carefully chosen to be mutually orthogonal to each other. These codes are derived from an OVSF code tree, and each user is given a different, unique code. An OVSF code tree is a complete binary tree that reflects the construction of Hadamard matrices.

说明：  光伏发电功率主要受太阳辐照度影响，所以准确预测太阳辐照度对光伏功率预测十分重要。程序采用小波分解先对辐照度数据进行分解，然后再用bp神经网络对分解的辐照度数据分别预测，再组合作为最后的预测结果。(Photovoltaic power generation is mainly affected by solar irradiance, so accurate prediction of solar irradiance is very important for photovoltaic power prediction. The program uses wavelet decomposition to decompose the irradiance data, then uses BP neural network to predict the decomposed irradiance data separately, and then combines them as the final prediction result.)

说明：  1、对原文《线性时滞系统的记忆与无记忆复合H∞状态反馈控制》仿真例子作了修正。原例子根据定理1没有解。 2、对该控制方法利用matlab lmi工具箱做了仿真验证。(matlab lmi toolbox)

利用MATLAB GUI做的三维数据自动绘图程序，安装运行库后可自动运行，实现从EXCEL读取数据并自动绘制三维曲面图的功能(Using three-dimensional data in MATLAB GUI to do automatic drawing program, after installation of runtime to run automatically read data from a EXCEL and automatically draw the three-dimensional surface map features)