geom

Blowfish Algorithm is a Feistel Network, iterating a simple encryption function 16 times. The block size is 64 bits, and the key can be any length up to 448 bits. Although there is a complex initialization phase required before any encryption can take place, the actual encryption of data is very efficient on large microprocessors. Blowfish is a variable-length key block cipher. It is suitable for applications where the key does not change often, like a communications link or an automatic file encryptor. It is significantly faster than most encryption algorithms when implemented on 32-bit microprocessors with large data caches.

二维FDTD程序，采用PML边界s 用pml和mur分别计算j=1处的Hz(i,1).计算空间扩大到400*400，不加边界，运行相同的时间步(2D FDTD procedures, Application of the PML's border with pml and mur calculated j = 1 Hz of (i, 1). for the space to expand to 400* 400, without borders, running the same time step)

neural network classification

说明：  代码中含有多种多目标优化的测试函数，在代码中修改即可测试。(The code contains a variety of multi-objective optimization test functions, which can be tested by modifying the code.)

将地震波转换成反应谱的程序。。。。。。。。。。。(seismic wave to spectrum..........)

说明：  通过引入磁光材料的非互易回转因子，形成新型光束传播方法（BPM），从而计算磁光波导的非互易效应。磁光波导参数可调，非互易回转因子可调。(calculate the nonreciprocal effect of magneto-optical waveguide using the beam-propagation method based on nonreciprocal element.)

说明：  B样条的编程代码，通过MATLAB生成图形(B-spline programming code, graphics generated by MATLAB)

Matlab 7.0 安装的详细教程(Matlab installation detailed tutorial)

运用三层BP网络结构（输入层、隐含层、输出层）实现算法，进行十进制与二进制的转换。(The use of three-tier structure of BP network (input layer, hidden layer, output layer) implementation algorithm, and binary to decimal conversion.)

三维的，基于image模型的房间混响模型的脉冲响应算法。(3-d room reverberation pulse response based on image model)