Key technologies and applications of realistic rendering in 3D virtual scene Key technologies and applications for internet of video things Key technologies and applications of intelligent food risk traceability Key technologies and applications of autonomous underwater vehicles Key technologies and applications of intelligent spray-painting robots Key technologies and applications of machine learning Key technologies and applications on location-based pan-information map Key technologies and applications in fishery forecasting New technologies and applications of GNSS augmentation for civil aviation Key technologies and application of close construction in city underground engineering