电子通讯录系统，功能包括用户注册、用户登录、修改密码、添加好友、添加好友联系-Electronic address book system, features include user registration, user login, modify your password, add a friend, add a friend link

中继协作通信系统中转发协议DF策略传输主函数 -DF relay cooperative communication system policy transmission main function

Pscad file for elaluation of DF effect in protection and reliability of power system