计算机科学与技术系

Department of Computer Science and Technology

Education background

Bachelor of Electric Power Systems and Automation, Tsinghua University, Beijing, China, 1998;

Bachelor of Environmental Engineering (Second Degress), Tsinghua University, Beijing, China, 1998;

Ph.D. in Electrical Engineering, Tsinghua University, China, 2003.

Social service

Intel Academic Advisory Community: Council Member (2009- );

China Computer Federation: Member of Information Storage Technical Committee (2009-);

ISCA 2008 Workshop on Computer Architecture Education: Local chair (2008);

MICRO 2009 Workshop on Computer Architecture Education: Program Committee member (2009).

Areas of Research Interests/ Research Projects

Parallel Numerical Algorithm

Network Storage

National Natural Science Foundation of China: Studies on the Reliable and Scalable Algorithms for Real-Time Simulation of Complex Power Systems (2008-2010);

National 863 High-Tech Program: Peta-Scale High-Performance Mass Storage System and its Applications (2008-2010);

National 863 High-Tech Program: Performance Tuning of the NWP System of GRAPES on Chinese High-Productivity Computing Systems (2009-2010).

The National Basic Research Program of China (The 973 Program): Multi-Flux Ensemble Simulations of High-Resolution Climate System Model (2010-2014).

Research Status

My research interests are parallel algorithm as well as parallel software design and implementation for cutting-edge applications such as power system dynamic simulation, reservoir simulation, numerical weather prediction and climate system model. My research contributions include:

1. I have proposed a spatial parallel DAE algorithm based on sub-structure method, a multi-level convergence judgment scheme for power system dynamic simulation, as well as a novel multi-level partition scheme based on power network regional characteristics. This scheme has better computational efficiency than traditional spatial parallel algorithms and the partitions using METIS, which is a famous program used for partitioning graphs.

2. We have designed and implemented TH-PaPSM, a parallel software for power system dynamic simulation. TH-PaPSM is able to hold real-time simulation for huge power network with over ten-thousand nodes. Currently, TH-PaPSM has already been deployed in China Southern Power Grid.

3. Based on TH-PaPSM and in collaboration with Prof. Shen Chen from Dept. of EE, we have designed and implemented a distributed prototype for dynamic security analysis on large-scale power systems . We have proposed an improved quasi-Newton algorithm, a schedule scheme for multi-case, and an application-specific communication middleware over WAN. Test results showed that our system is feasible for on-line use, which cannot be achieved by known methods.

My research group also works on the design and development of distributed file-system and secure storage in distributed system. Research contributions include:

1. We have proposed an adaptive metadata management strategy, which has more flexibility and better response time than well-known dynamic sub-tree partitioning method in large-scale file systems.

2. In distributed shared storage systems, it is difficult for users to secure data storage or data sharing of their own files due to lack of control over underlying storage. To solve this issue, we have designed and implemented a stackable secure storage, called Corslet, which runs directly on deployed storage systems without any modification. Corslet brings end-to-end confidentiality and integrity as well as efficient access control for user data.

Honors And Awards

Science and Technology Progress Award by Ministry of Education, First Class-Testing Scheme for High Performance Computers (2009);

Science and Technology Progress Award by Chinese institute of Electronics, First Class-Testing Scheme for High Performance Computers (2009).

Academic Achievement

[1] Wei Xue, Jiwu Shu, Weimin Zheng. Parallel Transient Stability Simulation for National Power Grid of China. Proc. Parallel and Distributed Processing and Applications: Second International Symposium (ISPA 2004), Hong Kong, China, 2004, pp.765-776

[2] Wei Xue, Jiwu Shu, Weimin Zheng. Parallel Algorithm and Implementation for Realtime Dynamic Simulation of Power System. Proc. the 34th International conference on parallel processing (ICPP 2005), Oslo, Norway, 2005, pp.137-144

[3] Jiwu Shu, Wei Xue, Weimin Zheng, A Parallel Transient Stability Simulation for Power System. IEEE Transactions on Power Systems, vol. 20, no. 4, pp.1709-1717, 2005

[4] Weijia Li, Wei Xue, Jiwu Shu, Weimin Zheng. Dynamic Hashing: Adaptive Metadata Management for Petabyte-scale File Systems. Proc. 23rd IEEE Conference on Mass Storage Systems and Technologies (MSST 2006), Maryland, USA, 2006 (short paper)

[5] Wei Xue, Shanxiang Qi. Multilevel Task Partition Algorithm for Parallel Simulation of Power System Dynamics. Proc. The 15th International Conference on Computational Science (ICCS 2007), Beijing, China, 2007, pp.529-537