系统网络拓扑结构采用共享总线型，大型网络控制器NCE通过BACnet MS/TP现场总线连接下位的小型多功能DDC控制器FEC，实现数据共享和分散控制-System network topology using a shared bus-based, large-scale network controller NCE through the BACnet MS/TP field bus to connect the next bit of small multifunctional DDC c

可以画出ba模型图像，调用函数非常方便，大家学习复杂网络很多自己的模型可以以这个程序为基础-Can draw ba model image, the calling function is very convenient, we learn a lot of their complex network model can be the basis of this program

在复杂网络学习过程中常见的几种类型网络构建程序，如BA网络，NW网络等-In a complex network in the learning process of several common types of network building program, such as BA networks, NW network, etc