Schema incompatibility is a major challenge to a federated database systemfor data sharing among heterogeneous,multiple and autonomous databases.This paperpresents a mapping approach based on import schema,export sche...Schema incompatibility is a major challenge to a federated database systemfor data sharing among heterogeneous,multiple and autonomous databases.This paperpresents a mapping approach based on import schema,export schema and domain conver-sion function,through which schema incompatibility problems such as naming conflict,domain incompatibility and entity definition incompatibility can be resolved effectively.The implementation techniques are also discussed.展开更多
Database system is the infrastructure of the modern information system. The R＆D in the database system and its technologies is one of the important research topics in the field. The database R＆D in China took off la...Database system is the infrastructure of the modern information system. The R＆D in the database system and its technologies is one of the important research topics in the field. The database R＆D in China took off later but it moves along by giant steps. This report presents the achievements Renmin University of China （RUC） has made in the past 25 years and at the same time addresses some of the research projects we, RUC, are currently working on. The National Natural Science Foundation of China supports and initiates most of our research projects and these successfully conducted projects have produced fruitful results.展开更多
通过分析哈尔滨工业大学图书馆目前在查收查引服务中存在的效率低、重复工作多的现象,考虑建立查收查引数据库平台,将哈尔滨工业大学专家学者基于Web of Science平台和EI等检索系统收录和引用的文献保存在数据库平台上,以方便申报科研...通过分析哈尔滨工业大学图书馆目前在查收查引服务中存在的效率低、重复工作多的现象,考虑建立查收查引数据库平台,将哈尔滨工业大学专家学者基于Web of Science平台和EI等检索系统收录和引用的文献保存在数据库平台上,以方便申报科研项目时能快速准确的提交检索认证报告,从而提高工作效率,减少重复劳动。展开更多
文摘Schema incompatibility is a major challenge to a federated database systemfor data sharing among heterogeneous,multiple and autonomous databases.This paperpresents a mapping approach based on import schema,export schema and domain conver-sion function,through which schema incompatibility problems such as naming conflict,domain incompatibility and entity definition incompatibility can be resolved effectively.The implementation techniques are also discussed.
基金Supported by the National Natural Science Foundation of China. Acknowledgements The National Science Foundation of China supported these works. Thanks to NSFC and all the members of the research groups in Renmin University of China.
文摘Database system is the infrastructure of the modern information system. The R＆D in the database system and its technologies is one of the important research topics in the field. The database R＆D in China took off later but it moves along by giant steps. This report presents the achievements Renmin University of China （RUC） has made in the past 25 years and at the same time addresses some of the research projects we, RUC, are currently working on. The National Natural Science Foundation of China supports and initiates most of our research projects and these successfully conducted projects have produced fruitful results.
文摘通过分析哈尔滨工业大学图书馆目前在查收查引服务中存在的效率低、重复工作多的现象,考虑建立查收查引数据库平台,将哈尔滨工业大学专家学者基于Web of Science平台和EI等检索系统收录和引用的文献保存在数据库平台上,以方便申报科研项目时能快速准确的提交检索认证报告,从而提高工作效率,减少重复劳动。
