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matlab图像处理，把初始图像处理后，进行水印提取(matlab)

趋势面分析是拟合数学曲面的一种统计方法。通常要找到一个合适的曲面精确表达实际问题往往比较困难，但却可以利用多项式函数来近似逼近它。(trend surface analysis is fitting surfaces of a mathematical statistical methods. Usually to find a suitable surface accurately reflect the actual problems are often more difficult, but polynomial function can be used to approximating it.)

SPN的差分密码分析，建议选取的明密文对数量为8000+，太小可能结果有偏差(SPN Differential cryptanalysis, ciphertext clear recommendations for selected number of 8000+, too small deviations may result)

倒频谱例子，一个到频谱的例子，利用MATLAB实现的(daopinpu)

说明：  无线通信原理系统应用中用到的MATLAB仿真，对与学习无线通信原理及MATLAB都很有帮助滴(pricinples of communication system simulation with wireless aplications with MATLAB)

运输问题的matlab源码，欢迎大家交流：）(transport issues Matlab source, all are welcome to exchange :))

实现傅里叶变换高通、低通滤波，理想滤波，各种滤波因子。(Fourier transform to achieve high-pass, low-pass filtering, ideal filtering, filter factor.)

信号与系统实验：gibs现象、卷积、信号的运算、网络函数！(Signal and System Experiment: gibs phenomenon, convolution, signal operations, network function!)

说明：  doppler 频移程序， 大家相互参考(doppler frequency shift procedures, U.S. cross-reference)

说明：  潮流计算，使用PQ分解法，是一种比牛顿法更优越的潮流计算法，收敛速度更快，收敛精度与牛顿法相同(power flow of P-Q)