并列题名：Research on intelligent authentication method of physical layer of internet of things Research on intelligent authentication method of physical layer of internet of things Technologies and intelligent applications of electric power internet of things 并列题名：Research on the supervision of chattel pledge in the financial industry of internet of things 并列题名：Research on integrated system of fresh agricultural products supply chain based on internet of things Intelligent applications and technologies of internet of things Intelligent applications and technologies of Internet of things