update README.md.

Signed-off-by: 刘明宏 <liuminghong@mail.sdu.edu.cn>

README.md

@@ -6,9 +6,9 @@
 
 #### 开发环境与代码说明 Software architecture
 
-Program language: MATLAB 
+1.  Program language: MATLAB 
-Software required: MATLAB and COMSOL
+2.  Software required: MATLAB and COMSOL
-Operating system: Windows
+3.  Operating system: Windows
 
 
 #### 安装教程 Installation