xiaobo-quzao

此代码是基于DCT的数字水印MATLAB编程，包括水印的置乱和反置乱，嵌入以及提取水印四个部分(This code is based on digital watermark DCT MATLAB programming, including the watermark scrambling scrambling and anti-, four-part watermark embedding and extraction)

There are three kinds of switching mode DC-DC converters, buck, boost and buck-boost. The buck mode is used to reduce output voltage, whilst the boost mode can increase the output voltage. In the buck-boost mode, the output voltage can be maintained either higher or lower than the source but in the opposite polarity.

在MATLAB中用复合辛普森公式求函数的二重数值积分。(realizing double integral by Complex Simpsons Formula in MATLAB)

通信中伪随机码的产生，可以配置任意多项式和初值。(m sequence generation.)

The Lyapunov fractal is generated using logistics formula. Three types of fractal are generated with this script. The fractal is generated in 7 seconds.

独立成分分析的matlab实现，适合初学者学习和使用(Independent component analysis matlab implementation, suitable for beginners to learn and use)

ITS matlab code running explanation of motor and clearly gave the characteristics

根据所计算出的电力电子电路的模型，通过matlab绘制其非线性图形(分岔图)(According to the model of power electronic circuits calculated, drawn by matlab nonlinear pattern (bifurcation diagram))

克里格法是地统计学的主要内容之一，从统计意义上说，是从变量相关性和变异性出发，在有限区域内对区域化变量的取值进行无偏、最优估计的一种方法；从插值角度讲是对空间分布的数据求线性最优、无偏内插估计一种方法。(Kriging method is one of the main contents of geostatistics. Statistically speaking, it is a method of unbiased and optimal estimation of regionalized variables in a limited area from the point of view of correlation and variation of variables; from the point of view of interpolation, it is a method of seeking linear optimum and unbiased interpolation estimation of spatial distribution data. Law.)

分析了维纳滤波器均方误差及滤波性能与阶数和噪声方差之间的关系(Analysis of the Wiener filter and the filter mean square error performance and the order and the relationship between noise variance)