Academician Li Deyi put forward the graph pair theory of "control flow-data flow" for the first time in the world, and won the Best Academic Paper Award of Computer and Control Journals of the Year issued by ieee in 1985. He mapped the relational data model to predicate calculus, and proved the equivalence of solving symbolic problems in relational algebraic operation and logical reasoning. His monographs prolog Database System and Fuzzy prolog Database are widely cited. The cloud model he created was used to represent and reason uncertain knowledge, and his paper won the14th World Federation of Automatic Control Excellent Paper Award. The cloud generator won the national invention patent. He applied physical methods to the study of cognitive science, founded the theory of cognitive physics, expanded the research direction of artificial intelligence, and published the monograph "Uncertain Artificial Intelligence".
Academician Li Deyi has devoted himself to the research of artificial intelligence for a long time, and won two national scientific and technological progress 1 and third prizes, three ministerial scientific and technological progress first prizes and four second prizes, edited seven technical series, and trained more than 40 doctoral and master students.
Academicians were awarded by the state as outstanding overseas returnees and enjoyed special government allowances. Young and middle-aged experts with outstanding contributions from the state won the He Li Award.