Oct.1999 - Jan.2002 post-doctoral Tsinghua University Department of Computer Science and Technology                      

Sep.1995.09 - Sep.1999.09  Ph.D. Intelligent Control/Computer Control Department of Automatic Control, Northwestern Polytechnical University(China)

Sep.1992.09 - Jul.1995 Computer Software Master, Northwest University(China) Computer Science Department            

Sep.1986.09 - Jul.1990  Computer aided Design and Manufacturing B.S, Department of Manufacturing Engineering, Beihang University(China)

Oct.2023 - present  Tsinghua University-Client Service International Inc. Joint Institute for Advanced Intelligent Database   Dean

Dec. 2023 - present  Processor Architecture Innovation Group, Beijing National Research Center for Information Science and Technology, Tsinghua UniversityCore Expert

Feb.2016 - Oct.2021 Research Institute of Information Technology, Tsinghua University  vice-dean

Nov.2016 - Oct.2021  Institute of Internet Industry, Tsinghua University  vice-dean

Oct.2016 - Sep.2021 Institute for China Sustainable Urbanization, Tsinghua University  vice-dean

Dec. 2019 - present  Beijing National Research Center for Information Science and Technology , Tsinghua University  Professor  

2019-Dec. 2023 Research Department of Trusted Software and Big Data, Beijing National Research Center for Information Science and Technology, Tsinghua University  Standing Deputy Director

Jul.2019 - present Institute for Interdisciplinary Medicine and Engineering, Tsinghua University vice-dean

Jul.2010 - Jan.2016 Research Institute of Information Technology, Tsinghua University assistant to the dean

Dec. 2008 - Oct.2019 Research  Institute of Information Technology, Tsinghua University Professor

Oct.2003- Oct.2021  WEB and Software Technology R&D Center, Research Institute of Information echnology, Tsinghua University  Director

Oct.2003 - Nov.2008 Research Institute of Information Technology, Tsinghua University Associate Professor

Jul. 2024 - present Russian Academy of Engineering  Foreign Full Member (Foreign Academician)    Associate Director

Jan.2024 - present Information System Committee of China Computer Federation    Director

Dec. 2022 - Present Metaverse Special Committee(China University Artificial Intelligence and Big data Innovation Alliance)    Director

Dec. 2021 - Present China Computer Federation  Member of Council

Jan.2020 - Present Health Information Science and Systems Journal  Associate Editor

Jun.2019 - Present Intelligent Medical Branch of Chinese Medical Doctor Association   executive director

intelligent medical committee of Chinese Medical Doctor Association   Member

Oct.2018 - Aug. 2022 Blockchain Branch of Chinese Institute of Electronics   Associate Director

Dec. 2017 - Present Health Big Data and Digital Medical Branch of China International Exchange and Promotion Association for Medical and Healthcare   Deputy Director

Jul.2016 - Present Zhongguancun Blockchain Industrial Alliance   Deputy Director

Dec. 2012 - Dec. 2023 Information System Committee of China Computer Federation

His research primarily focuses on the Database and data warehouse, Big data and knowledge engineering, Artificial intelligence, software engineering, Blockchain technology, Smart city and  E-government.

A multi-layer architecture supporting massive digital resource services and management systems (DRMS) has been proposed. This framework addresses the characteristics of large-scale digital resources including distribution, dynamism, massive scale, and heterogeneity, providing an internet-oriented foundational software platform with independent intellectual property rights. The first doctoral dissertation and postdoctoral research report on digital libraries in China were published, offering crucial technical support for the overall design and implementation of China's National Digital Library.

For trustworthy verification of composite web services, we proposed the WCFA (Web Service Interface Control Flow Automaton) formal model, which enables modeling and formal verification of web service interfaces. Based on probability distributions from domain classification models, we developed novel methods for user interest representation, similarity calculation, and interest updating. To address data sparsity in collaborative filtering, we introduced concepts including user authority, resource popularity, global authority, and domain authority to reflect evaluation stability and resource acceptance levels. This work resulted in China's first publication at the WWW2003 top-tier international conference.

In e-government applications, we established the Government Information Architecture (GIA), encompassing scientific theoretical methods, technical support systems, layered reference models, and standardization frameworks. We led the development of national standards for e-government information resource directory and exchange systems. The GIA has become a key reference for China's national informatization framework, with its directory system adopted as a national standard.

For big data management and analysis, we proposed the LCUKS model and developed Huabase - China's first independently developed columnar database management system. This system achieved breakthroughs in core technologies including data compression, on-demand reading, sparse indexing, data object modeling, lifecycle management, object traceability, and personalized recommendation. It features significant innovations in unstructured data organization, data distribution, loading, and parallel query processing. For analytical queries such as set similarity search, approximate join, approximate query processing, and spatial-text search, we developed innovative methods utilizing indexing, data transformation, reuse, and generative techniques combined with new hardware technologies like SSDs and SGX. These approaches significantly improve retrieval efficiency while ensuring cloud data security, achieving internationally leading levels in columnar database architecture and key technologies.

Addressing the challenges of heterogeneity, autonomy, complexity, and evolution in healthcare big data, we developed credible, efficient, and intelligent big data-driven methods for knowledge representation, management, integration, and reasoning. We established a prototype knowledge graph-based medical decision support system, investigated classification and prediction problems in healthcare data, and developed novel deep learning frameworks incorporating domain knowledge and social relationships. These innovations significantly improved classification and prediction accuracy. Specific contributions include entity extraction, relationship extraction, and knowledge graph construction methods for cardiovascular applications. Our work demonstrates breakthroughs in healthcare big data management and integration, significant innovations in knowledge graph construction technology, and independent advances in semantic analysis, knowledge discovery, and big data sharing - achieving internationally leading levels in comparable technologies.

He has won the second prize of the National Science and Technology Progress Award, the Science and Technology Achievement Award of the Ministry of Education, the first prize of China Assocition of Inventions' Innovation Award of Invention and Entrepreneurship Award, the second prize of the Achievement Award for China Industry University Research Collaboration Innovation , the Individual Award for China Industry University Research Collaboration Innovation , the annual "Metaverse 30 People" for China Metaverse Innovator Award, the annual "Blockchain 60 People" for China blockchain Innovator Award, and the Blockchain Person of the Year award.

He published more than 400 papers, including 40 SCI and 300 EI journal and conference articles(Google Citations 3600+，h-index 31) , authored or translated 10 books (including co-authored works). He has obtained 33 software copyrights,  43 patents of invention, and a technological achievement of Ministry of Education of China. His research has been supported by a number of national programs of China, such as National Basic Research Program (973), Natural Science Foundation of China, National High-Tech R&D Program (863), National High-Tech Industrialization Project of CNGI, National Science and Technology Support Program, and more than 40 projects was achieved.

He has trained more than 40 postgraduate students, guided more than 10 doctoral students and more than 10 postdoctoral students.

Zhang Yong, Li Chao, Zhou Yuxi, Zhou Yuanyuan, Sheng Ming, Zhang Jian, Wei Xin, Feng Fengxia, Ren Peng, Li Yuxuan, Wang Qing, Wang Haozhou