计算机科学与技术系

Department of Computer Science and Technology

  • Weidong LIU
  • Professor
  • Department of Computer Science and Technology
  • Joined Department: 1994
  • Email:liuwd@tsinghua.edu.cn
  • URL:
  • Phone:+86-10-62781446
  • Fax:+86-10-62781446

Education background

Bachelor of Computer Science, Tsinghua University, Beijing, China, 1990;

Master of Computer Science, Tsinghua University, Beijing, China, 1994;

Ph.D. in Computer Science, Tsinghua University, Beijing, China, 2006.

Social service

Department of Computer Science and Technology, Tsinghua University: Vice Dean (2005-2010);

Consultative Committee for Emergency Management, Ministry of Education: Member (2010-2014);

Expert Committee for the Protection of Ancient Books, Ministry of Culture: Member (2007-2010).

Areas of Research Interests/ Research Projects

Database Management Systems, Distributed Information Systems

Sensor Network

Key Project of Ministry of Education: NAtional College and University Enrolling System (NACUES) (1998-2010);

The National Basic Research Program of China (The 973 Program): Research on Theory and Key Techniques of Wireless Sensor Networks (2006-2010);

National Industrial High-Tech Program: National College and University Recruitment System on IPv6 Network (2008-2010);

Tsinghua University Independent Research Program: Research on Key Techniques of Sensor Networks for Sea Monitoring (2009-2011).

Research Status

Currently, my research interests include the modeling and architecture of distributed information systems, and theories and applications of wireless sensor networks.

In the area of distributed information systems, I have modeled the distributed information system and proposed a performance analysis based on Petri Net. I have also designed its architecture, and function modules and algorithms for data exchange, data privacy, etc. Based on them, my research group have designed and implemented the National College and University Enrolling System (NACUES) in 2000. NACUES successfully informationized the whole procedure of enrolling, in which the staff of admission offices on their own campuses could get all materials via Internet from respective Provincial Admission Centers. Till the year of 2009, NACUES had been adopted by 30 Provincial Admission Centers and all nation-wide universities and colleges (over 3000) to serve the admission process. Nearly 35 million students have been benefited from this system and enrolled by their universities.

In the area of wireless sensor networks, I focus on data transmission protocols and the applications of WSN under water.

Honors And Awards

Science and Technology Progress Award by Ministry of Education, Second Class-NAtional College and University Enrolling System (NACUES) (2001);

Science and Technology Progress Award by Fujian Province, First Class-Information Management System for National Higher Education Exams for Self-Taught Adults (2003);

Outstanding Teaching Award by City of Beijing, First Class-Computer Organization (2005).

Academic Achievement

[1] Weidong Liu, Dongsheng Peng, Chuang Lin, Zhen Chen, Jiaxing Song. Enhancing tit-for-tat for incentive in BitTorrent networks. Peer-to-Peer Networking and Applications, no. 3, pp. 27-35, 2010.

[2] Liu Weidong, Lin Chuang, and Wang Jirong. A Novel Data Transmission Scheme for Mobile Sensor Network. International Journal of Computer Systems Science and Engineering, vol. 24, no.3, 2009.

[3] Peng Dongsheng, Liu Weidong, Lin Chuang, Chen Zhen. A Fair Transaction Mechanism for P2P File-Sharing Applications. Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference, Las Vegas, NV, USA, 2009, pp. 1242-1246.

[4] Peng Dongsheng, Liu Weidong, Lin Chuang, Chen Zhen, Song Jiaxing. A Loosely Synchronized Gossip-Based Algorithm for Aggregate Information Computation, IEEE 33RD CONFERENCE ON LOCAL COMPUTER NETWORKS, Montreal, CA, 2008, pp. 440-444.

[5] LIU Wei-dong, SONG Jia-xing, LIN Chuang. Modeling and Analysis of Grid Computing Application Based Price Timed Petri Net. Tien Tzu Hsueh Pao/Acta Electronica Sinica, vol. 33, no. 8, pp. 1416-1420, 2005 (in Chinese) .

[6] Liu weidong, Xu ke, Liu yaxiao. Loosely coupled distributed information. Qinghua Daxue Xuebao/Journal of Tsinghua University,, vol. 42, no. 1, pp. 40-43,2002(in chinese).