matlab编写的关于fdtd编程的步骤和具体方法，适合初学者，且直接是三维结构，用mur吸收边界条件-Matlab fdtd prepared by the programming steps and concrete measures for beginners, which is the three-dimensional structure directly with mur absorbing boundary conditions

利用MatLab软件，实现一种或几种循环码的编译码过程。再现编码和译码的步骤，绘制有关的性能曲线和波形图，并且能检错和纠错。-use MatLab software, to achieve one or a few recycling code encryption process. Reproduction coding and decoding steps, drawing on the performance curve and waveform map, and can, and err