Key technology and application of digital community based on internet of things Technology & application for narrow band internet of things Core technology and application of internet of things 封面英文题名：Technology & application for narrow band internet of things。 Technology and application of optical communication Intelligent applications and technologies of internet of things Key technologies and applications for internet of video things Modeling technology and application of small arms based on virtual prototype Technology and application of laser communication network in stratosphere Key technology and application of intelligent test system based on cloud architecture