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matlab编写的对二值图像的数字水印添加与提取程序。压缩包中有示例图片。可以添加水印，结果肉眼不易分辨出变化，不影响使用。可加入信息长度达100个字节。提取时可验证是否被修改过，如修改不严重，可提取隐藏信息，如果修改过多，则只能确定是否有修改，而不知道隐藏的信息是什么(matlab prepared binary image of the digital watermark added and extraction procedures. Compression package has sample images. Can add watermarks, the results of the changes are not easily distinguishable from the naked eye, does not affect use. Can be added to the information length of 100 bytes. Verifiable extraction has been modified, such as modification is not serious, can extract hidden information, if too many modifications, you can only determine whether changes were needed, they do not know what information is hidden)

平凹腔激光模式计算程序，利用边界元方法计算，matlab编程！(concave cavity laser mode procedures, the use of the boundary element method, the Matlab programming!)

3G物理层调制和解调的演示仿真模型。 A simulation of physical layer of 3G communication system.(3G physical layer modulation and demodulation of the display simulation model. A simulation of physical layer of 3G communicat ion system.)

MATLAB SIMULATION OF SLR,PLR & MULTIPULSE CONVERTER

说明：  电力系统的牛顿-拉夫逊法潮流计算。 基本步骤： （1）形成节点导纳矩阵 （2）将各节点电压设初值U， （3）将节点初值代入相关求式，求出修正方程式的常数项向量 （4）将节点电压初值代入求式，求出雅可比矩阵元素 （5）求解修正方程，求修正向量 （6）求取节点电压的新值 （7）检查是否收敛，如不收敛，则以各节点电压的新值作为初值自第3步重新开始进行狭义次迭代，否则转入下一步 （8）计算支路功率分布，PV节点无功功率和平衡节点柱入功率。(Power system of Newton- rafer Johnson flow calculation method-matlab)

粒子滤波器,比较几种不同的重采样方法.SIR重采样,辅助重采样,regular重采样.(particle filter, compare several different resampling methods. SIR resampling, support resampling, regular resampling.)

the code simulate the transmission using convlutional encoder and vetirbi decoder

ieee33节点潮流计算结果 含节点电压和支路电流，支路功率，支路功率损耗等所有潮流信息(ieee33 power flow)

此程序很好的实现了Turbo码的编码以及解码。运行main函数，然后输入相关参数。(This program achieved a very good encoding and decoding Turbo codes. Run the main function, and then enter the relevant parameters.)

使用matlab对矩阵中的元素进行蛇形访问，并依次存放到新的向量里面(snake-like access to the elements of the matrix by MATLAB, and sequentially stored into the new vector)