xiangqian

基于LSB的直接4bit替换法，就是直接用秘密图像像素值的高4bit去替换载体图像像素值的低4bit。 (Direct 4bit substitution, that is, the direct use of the secret image pixel values of the high-4bit image pixel value to replace the carrier' s low 4bit.)

说明：  对成型脉冲串进行中频调制，输出为复基带信号。还可通过各种自定义信道。(On the frequency modulated pulse train forming the output for the complex baseband signal. Can also be customized through various channels.)

Programa que calcukla la cinematica de la ola por Airy y Stokes de 2º orden

Constrained_only nolinearPSOkarseb

复杂网络中最经典的BA无标度网络模型matlab源程序并且有求解度的程序代码，非常的实用，是研究复杂网络必备的网络模型。(Complex network in the most classic of BA scale-free network model has to solve matlab source and degree of code, very useful, is to examine the complex network required network model.)

用MATLAB编写程序证明Poisson分布的性质(Programming with MATLAB，prove the properties of Poisson distribution)

基于MATLAB Simulink的风力发电系统的风力机模型。(MATLAB Simulink based on the wind power generation system of wind turbine model.)

用于MATLAB作图中，多张图的合并（里面的文件路径需要根据需要更改）(For the MATLAB plot, the multiple number of pictures merger (inside the file path needs to be changed as needed))

节点导纳矩阵求解，输入节点数、支路数以及支路信息，即可求得节点导纳。(Node admittance matrix solver, the input nodes, number of branches and branch information, the node can be obtained admittance.)

OFDM系统通过在时域符号前插入大于信道冲击响应长度的循环前缀（CP）可以避免符号间干扰(ISI)和载波间干扰(ICI)。但是，过长CP会使得数据传输效率降低。可以采用最小均方误差（MMSE）信道缩短均衡技术来压缩信道冲击响应长度。(OFDM systems avoid inter-symbol interference (ISI) and inter-carrier interference (ICI) by inserting a cyclic prefix (CP) larger than the channel impulse response length before the time-domain symbol. However, long CP will reduce the efficiency of data transmission. A minimum mean square error (MMSE) channel shortening equalization technique may be employed to compress the channel impulse response length.)