数学建模 病毒传播SIS模型研究中第二小题的m文件，参考自无标度网络的代码，原先做题时运行生成A、B各5000个节点，100次重复运算取平均，整整跑了24083秒，将近7小时- -，后来有空对代码简化，同样的计算，只需要365秒，才6分钟…有兴趣的可以研究下。-The second theme m file in mathematical modeling virus propagation SIS model, reference scale network code, originally done title run generate A, B 5,000 nodes, computing average 100 times repeated, a full run 24,083 seconds, nearly seven hours- later time to simplify the code, the same calculation, only 365 seconds, only 6 minutes ... interested can study.