讲授课程 数据库技术与应用 信息与社会 数据恢复技术 科研成果 A layered trust model based on behavior in service grid Research on CRL distribution in P2P systems. 2nd IEEE International Conference on Computer Science and Information Technology ITREKS:Keyword Search over Relational Database by Indexing Tuple Relationship Exploiting Connection Relation to Compress Data Graph Study on Efficiency and Effectiveness of KSORD Ontology-based sematntic search over relational databases . Research and implementation of full text index on Chinese in PostgreSQL Distributed Top-k Queries in E-commerce Environment