Li Xia, Ph.D.

Associate Professor

Center for Intelligent and Networked Systems (CFINS)

Department of Automation, Tsinghua University

Beijing 100084, China

Tel: +86 (10) 6279 3029  Fax: +86 (10) 6279 6115

Email: xial@tsinghua.edu.cn

Homepage: http://cfins.au.tsinghua.edu.cn/personalhg/xiali/

 Education

2002.9-2007.7, Ph.D. degree in control science and engineering, Department of Automation, Tsinghua University, Beijing, China.
1998.9-2002.7, Bachelor degree, Department of Automation, Tsinghua University, Beijing, China.

 

  Working Experience

Associate Professor, Department of Automation, Tsinghua University, 2013.12-
Lecturer, Department of Automation, Tsinghua University, Beijing, 2011.12 - 2013.11
Post-Doctoral Fellow, Division of Mathematical and Computer Sciences & Engineering, King Abdullah University of Science and Technology, Saudi Arabia, 2009.11 - 2011.11
Research Staff, IBM China Research Laboratory, 2007.7 - 2009.10

  Expertise and Research Interests

Theoretical Research: Stochastic Optimization; Queueing Theory; Markov Decision Processes; Reinforcement Learning
Application Research: Building Energy; Energy Internet; Industry Intelligence; Internet of Things

 

  Academic/Social Activities and Memberships

Visiting Scholar, Stanford University, USA,  2015.3 - 2015.8
Visiting Scholar, University of Waterloo, Canada,  2010.7 - 2010.8
Visiting Scholar, Hong Kong University of Science and Technology, 2010.4 - 2010.5
Research Assistant, Hong Kong University of Science and Technology, 2005.1 - 2005.9, 2006.7 - 2007.1
Guest Editor: International Journal of Simulation and Process Modelling
Associate Editor: CEB of IEEE CSS (IEEE CDC, ACC),  IEEE CASE’2016, IEEE CASE’2015
Program Committee Member: WODES’2016, SIMULTECH’2016, SIMULTECH’2015, CCC’2016, CCC’2015, CCC’2014, IEEE ROBIO’2015, IEEE ROBIO’2014, IEEE ICNSC’2014
Reviewer: IEEE Transactions on Automatic Control, IEEE Transactions on Automation Science and Engineering, IIE Transactions, European Journal of Operational Research, Discrete Event Dynamic Systems, Performance Evaluation, Journal of Optimization Theory and Applications, etc.
IEEE Senior Member since 2016

   Grants and Contracts / Research Projects

Research projects as Principal Investigator
? The National Natural Science Foundation of China (NSFC 61573206): Fairness-based optimization theory of queueing systems and its application, 2016.1 – 2019.12, principal investigator (PI).
? The National Natural Science Foundation of China (NSFC 61203039): Performance optimization of queueing systems based on difference sensitivity information, 2013.1 – 2015.12.
? The Specialized Research Fund for the Doctoral Program of Higher Education (20120002120009): Optimization method and game theoretical analysis of queueing model based on performance potentials, 2013.1 – 2015.12.
? Collaboration travel fund of King Abdullah University of Science and Technology, 2010.
Research projects participated in
? The Key R&D Project of China (2016YFB0901900): Fundamental theory of planning, operating, and trading of energy Internet, 2016.7-2020.6.
? The National Natural Science Foundation of China (NSFC U1301254): Optimization Based Matching and Scheduling for Smart Grid Supply and Demand Based on Energy Information Sensing and Analysis, 2014.1 – 2017.12.
? The National 111 International Collaboration Project (B06002): Intelligent and Networked Systems, 2011-2015.
? International collaboration project with UTC: Smart building energy research, 2012-2015.
? 2003-2004, Efficient simulation and optimization of service network. It is a joint research project between UTRC (United Technologies Research Center) and Tsinghua University.
? Several projects of NSFC: Hierarchical control and optimization based on policy iteration in hybrid systems; research on localization and tracking in wireless sensor networks; etc.

   Honors and Awards

· Award for the outstanding reviewer of IEEE Transactions on Automatic Control, 2015
· Best paper award of WCICA 2014
· The second prize of the natural science award of higher schools from the Ministry of Education in 2013
· Best review paper award in Chinese Automation field in 2005.
· The First Prize in the SCILAB computation contest, which is held by Chinese Academy of Sciences and INRIA, France, 2002.

   Academic Achievements

[Book Chapter]
[1] Li Xia and Xi-Ren Cao, “Perturbation Analysis, Dynamic Programming, and Beyond,”  Chapter 7 (pp. 127-156) of the Book Stochastic Simulation Optimization for Discrete Event Systems –
Perturbation Analysis, Ordinal Optimization, and Beyond, (Edited by C.H. Chen, Q.S. Jia, L.H Lee), World Scientific Publishing, 2013.
[Journal]:
[1] Li Xia, Qi-Ming He and Attahiru Alfa, “Optimal control of state-dependent service rates in a MAP/M/1 queue,” IEEE Transactions on Automatic Control, accepted, 2016.
[2] Li Xia, “Optimization of Markov decision processes under the variance criterion,” Automatica, accepted, 2016.
[3] Li Xia and Qing-Shan Jia, “Parameterized Markov decision process and its application to service rate control,” Automatica, Vol.54, pp. 29-35, 2015.
[4] Li Xia and Basem Shihada, “A Jackson network model and threshold policy for joint optimization of energy and delay in multi-hop wireless networks,” European Journal of Operational Research, Vol. 242, pp. 778-787, 2015.
[5] Li Xia, “Service rate control of closed Jackson networks from game theoretic perspective,” European Journal of Operational Research, Vol. 237, No. 2, pp. 546-554, 2014.
[6] Li Xia, “Event-based optimization of admission control in open queueing networks,” Discrete Event Dynamic Systems: Theory and Applications, Vol. 24, No. 2, pp. 133-151, 2014.
[7] Li Xia, “Policy gradient approach of event-based optimization and its online implementation,” Asian Journal of Control, Vol. 16, No. 6, pp. 1735-1743, 2014.
[8] Li Xia and Basem Shihada, “Power and delay optimization in multi-hop wireless networks,” International Journal of Control, Vol. 87, No. 6, pp. 1252-1265, 2014.
[9] Li Xia, Qing-Shan Jia, and Xi-Ren Cao, “A tutorial on event-based optimization -- A new optimization framework,” Discrete Event Dynamic Systems: Theory and Applications, Vol. 24, No. 2, pp. 103-132, 2014.
[10] Li Xia and Basem Shihada, “Max-Min optimality of service rate control in closed queueing networks,” IEEE Transactions on Automatic Control, Vol. 58, pp. 1051-1056, 2013.
[11] Li Xia and Xi-Ren Cao, “Performance optimization of queueing systems with perturbation realization,” European Journal of Operational Research, Vol. 218, pp. 293-304, 2012.
[12] Li Xia, Wenjun Yin, Jin Dong, Teresa Wu , Ming Xie, Yanjia Zhao, “A hybrid nested partitions algorithm for banking facility location problems,” IEEE Transactions on Automation Science and Engineering, Vol.7, No.3, pp. 654-658, 2010.
[13] Li Xia, Xi Chen, Xi-Ren Cao, “Policy iteration for customer-average performance optimization of closed queueing systems,” Automatica, Vol. 45, No. 7, pp. 1639-1648, 2009.
[14] Li Xia, Qianchuan Zhao, and Qing-Shan Jia, “A structure property of optimal policies for maintenance problems with safety-critical components,” IEEE Transactions on Automation Science and Engineering, Vol. 5, No. 3, pp. 519-531, 2008.
[15] Xi Chen, Hongxing Bai, Li Xia, and Yu-Chi Ho, “Design of a randomly distributed sensor network for target detection,” Automatica, Vol. 43, No. 10, pp. 1713-1722, 2007.
[16] Li Xia and Xi-Ren Cao, “Relationship between perturbation realization factors with queueing   models and Markov models,” IEEE Transactions on Automatic Control, Vol. 51, No. 10, pp. 1699-1704, 2006.
[17] Li Xia, Xi Chen, and Xiaohong Guan, “A new gradient-based routing protocol in wireless sensor networks,” Springer LECTURE NOTES IN COMPUTER SCIENCE 3605: 318-325, 2005.
[18] Li Xia, Xi Chen, Qianchuan Zhao, Yongheng Jiang, and Xiaohong Guan, “Introduction to wireless sensor networks and their Applications,” Automation Panorama (Chinese Journal), 2004, vol.21, no.1, pp.34-37. (best review paper award in Chinese Automation field in 2005)
 
[Misc.]:
[1] Li Xia, Peter W. Glynn, “A generalized fundamental matrix for computing fundamental quantities of Markov systems,” arXiv:1604.04343, Apr. 2016.
[2] Li Xia, Book Review for the Book “Analytical Methods for Dynamic Modelers” by Hazir Rahmandad, Rogelio Oliva and Nathaniel D. Osgood, International Journal of Simulation and Process Modelling, 2016.
[3] Li Xia, Jie Song, Hui Xiao, Enlu Zhou, Preface to the Special Issue on “Simulation Modelling and Optimization of Large-Scale Systems”, International Journal of Simulation and Process Modelling, 2016.
 
[Conference]:
[1] Li Xia, Qi-Ming He and Attahiru Alfa, “Optimal control of service rates in a MAP/M/1 queue,” the 9th International Conference on Matrix-Analytic Methods in Stochastic Models (MAM’2016), June 28-30, 2016, Budapest, Hungary.
[2] Li Xia, “Optimization of parametric policies of Markov decision processes under a variance criterion,” the 13th International Workshop on Discrete Event Systems (WODES’2016), May 30-June 1, 2016, Xi’an, China.
[3] Fenfang Zhou, Li Xia, Wei Dong, Xinya Sun, Xiang Yan, and Qianchuan Zhao, “Fault diagnosis of high-speed railway turnout based on support vector machine,” the 2016 IEEE International Conference on Industrial Technology (ICIT’2016), March 14-17, 2016, Taipei, Taiwan, pp. 1539-1544.
[4] Bocheng Li and Li Xia, “A multi-grid reinforcement learning method for energy conservation and comfort of HVAC in buildings,” the 2015 IEEE International Conference on Automation Science and Engineering (CASE’2015), August 24-28, 2015, Gothenburg, Sweden.
[5] Li Xia, “An iterative approach to reduce the variance of stochastic dynamic systems,” Proceedings of the 19th IFAC World Congress, August 24-29, 2014, Cape Town, South Africa, pp. 10487-10492.
[6] Li Xia, “Some results of Markov decision processes under variance criterion,” the 2014 IEEE International Conference on Automation Science and Engineering (CASE’2014), August 18-22, 2014, Taipei, Taiwan.
[7] Qilong Huang, Qing-Shan Jia, Li Xia, Xiaohong Guan, and Xiaolan Xie, “EV Charging Load Scheduling Following Uncertain Renewable Energy Supply by Stochastic Matching,” Proceedings of the 2014 IEEE International Conference on Automation Science and Engineering (CASE’2014), August 18-22, 2014, Taipei, Taiwan, pp. 137-142.
[8] Yuanming Zhang, Qing-Shan Jia, Li Xia, “Weather-forecast based optimal unit scheduling with solar power integration,” Proceedings of the 33rd Chinese Control Conference (CCC’2014), July 28-30, 2014, Nanjing, China.
[9] Qilong Huang, Qing-Shan Jia, Li Xia, and Xiaohong Guan, “Event-Based Optimization for Stochastic Matching EV Charging Load with Uncertain Renewable Energy,” Proceedings of the 11th World Congress on Intelligent Control and Automation (WCICA’2014), June 29-July 4, 2014, Shenyang, China. (the AIAG Best Paper Award on Supply Chains)
[10] Fenfang Zhou, Li Xia, Qianchuan Zhao, and Ming Jiang,  “Statistical analysis of the random failure model of high-speed railway equipments,” Proceedings of the 11th IEEE International Conference on Networking, Sensing and Control (ICNSC’2014), April 7-9, 2014, Miami, FL, USA.
[11] Yulin Lei, Qing-Shan Jia, Li Xia, “Local event-based sensor activation for occupant distribution estimation in buildings,” Proceedings of the 11th IEEE International Conference on Networking, Sensing and Control (ICNSC’2014), April 7-9, 2014, Miami, FL, USA.
[12] Zhijin Cheng, Li Xia, Qianchuan Zhao, Yin Zhao, Fulin Wang, and Fangting Song, “Integrated control of blind and lights in daily office environment,” Proceedings of the 9th annual IEEE International Conference on Automation Science and Engineering (CASE’2013), August 17-21, 2013, Madison, Wisconsin, USA, pp. 599-604.
[13] Yin Zhao, Qianchuan Zhao, Li Xia, Zhijin Cheng, Fulin Wang, and Fangting Song, “A unified control framework of HVAC system for thermal and acoustic comforts in office building,” Proceedings of the 9th annual IEEE International Conference on Automation Science and Engineering (CASE’2013), August 17-21, 2013, Madison, Wisconsin, USA, pp. 422-427.
[14] Li Xia and Qing-Shan Jia, “Policy iteration for parameterized Markov decision processes and its application,” Proceedings of the 9th Asian Control Conference (ASCC’2013), June 23-26, 2013, Istanbul, Turkey.
[15] Li Xia and Basem Shihada, “Decentralized control of transmission rates in energy-critical wireless networks,” Proceedings of the 2013 American Control Conference (ACC’2013), June 17-19, 2013, Washington, DC., USA, pp. 113-118.
[16] Li Xia and Qing-Shan Jia, “Game theoretical control of service rates in closed Jackson networks,” Proceedings of the 25th Chinese Control and Decision Conference (CCDC’2013), May 25-27, 2013, Guiyang, China, pp. 4559-4564.
[17] Qing-Shan Jia, Zhe Wen, and Li Xia, “Event-based sensor activation for indoor occupant distribution estimation,” Proceedings of the 12th International Conference on Control, Automation, Robotics and Vision (ICARCV’2012), December 5-7, 2012, Guangzhou, China.
[18] Qing-Shan Jia and Li Xia, “Approximate event-based optimization for evacuation,” Proceedings of the 11th IFAC International Workshop on Discrete Event Systems (WODES’2012), October 3-5, 2012, Guadalajara, Mexico, pp. 372-377.
[19] Li Xia, “Optimal control of customer admission to an open Jackson network,” Proceedings of the 31st Chinese Control Conference (CCC’2012), July 25-27, 2012, Hefei, China, pp. 2362-2367.
[20] Li Xia, “Optimality property of service rates in closed Jackson networks,” the 2012 INFORMS International Conference, June 24-27, 2012, Beijing, China.
[21] Kamran Jamshaid, Basem Shihada, Li Xia, and Philip Levis, “Buffer sizing in 802.11 wireless mesh networks,” Proceedings of the 8th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (MASS’2011), October 17-21, 2011, Valencia, Spain, pp. 272-281.
[22] Li Xia, Wenjun Yin, Weida Xu, Ming Xie, and Jinyan Shao, “Efficient optimization of maximal covering location problems using extreme value estimation,” Proceedings of the 2009 Winter Simulation Conference (WSC’2009), December 13-16, 2009, Austin, Texas, USA, pp. 2395-2404.
[23] Li Xia, Ming Xie, Weida Xu, Wenjun Yin, and Jin Dong, “An empirical comparison of five efficient heuristics for maximal covering location problems,” Proceedings of the 2009 IEEE International Conference on Service Operations and Logistics, and Informatics (SOLI'2009), July 22-24, 2009, Chicago, IL, USA, pp.747-753.
[24] Li Xia, Ming Xie, Wenjun Yin, and Jin Dong, “MAX-MIN optimality of service rates in queueing systems with customer-average performance criterion,” Proceedings of the 2008 Winter Simulation Conference (WSC'2008), December 7-10, 2008, Miami, FL, USA, pp. 509-515.
[25] Jinyan Shao, Ming Xie, Li Xia, Wenjun Yin, and Jin Dong, “Optimal service channel reconfiguration based on multi-agent simulation”, Proceedings of the 2008 Winter Simulation Conference (WSC'2008), December 7-10, 2008, Miami, FL, USA, pp. 2950-2950.
[26] Li Xia, Yanjia Zhao, Ming Xie, Jinyan Shao, and Jin Dong, “Mixed integer programming based nested partition algorithm for facility location optimization problems,” Proceedings of the 2008 IEEE International Conference on Service Operations and Logistics, and Informatics (SOLI'2008), October 12-15, 2008, Beijing, China, pp.2375-2381.
[27] Li Xia, Ming Xie, Wenjun Yin, Jin Dong, and Jinyan Shao, “Markov decision processes formulation for stochastic and dynamic bank branches location problems,” Proceedings of the 2008 IEEE International Conference on Service Operations and Logistics, and Informatics (SOLI'2008), October 12-15, Beijing, China, pp. 419-424.
[28] Li Xia and Xi-Ren Cao, “Aggregation of perturbation realization factors and service rate-based policy iteration of queueing systems,” Proceedings of the 45th IEEE Conference on Decision and Control (CDC'2006), December 13-15, 2006, San Diego, CA, USA, pp.1063-1068.
[29] Li Xia, Qianchuan Zhao, and Qing-Shan Jia, “The SRLF rule in multi-unit joint replacement maintenance problem and its optimality,” 12th INFORMS/APS Conference, June 23-25, 2004, Beijing, China.
 
[Plenary Talk]:
[1] Xi-Ren Cao and Li Xia, “Performance optimization of queuing systems--from the viewpoint of perturbation analysis,” A Plenary Talk at the 5th International Conference on Queueing Theory and Network Applications (QTNA'2010), Beijing, July 24-26, 2010.
 
[Patent]:
US Patent
[1] Jin Dong, Li Xia, Ming Xie, Wen Jun Yin, Li Li Zhao, “Method for highlighting topic element and system thereof,” Patent No. US 8482575 B2, Date of Patent 2013.7.9.
[2] Jin Dong, Ta-Hsin Li, Jin Yan Shao, Li Xia, Ming Xie, Wen Jun Yin, Bin Zhang, “Method and apparatus for outlet location selection using the market region partition and marginal increment assignment algorithm,” Patent No. US 8458008 B2, Date of Patent 2013.6.4.
[3] Jin Dong, Ta-Hsin Li, Jin Yan Shao, Li Xia, Ming Xie, Wen Jun Yin, Bin Zhang, “Method and apparatus for optimal service channel reconfiguration based on multi-agent simulation,” Publication No. US 20110188404 A1, Patent No. US 8482575 B2, Date of Patent 2013.12.31.
P.R.C. Patent
[1] 赵丽丽, 董进, 尹文君, 谢明, 夏俐, “突出显示主题元素的方法及其系统”, 中华人民共和国发明专利授权, 专利授权号ZL 200910132264, 授权日2013.1.2.
[2] 夏俐, 赵千川, 赵寅, 程志金, 王福林, 宋芳婷, “基于学习用户行为的多维舒适度室内环境控制系统”, 中华人民共和国实用新型专利授权, 专利授权号: ZL 201320416241.5, 授权日2014.2.19.
[3] 夏俐, 赵千川, 程志金, 王福林, 赵寅, 宋芳婷, “具有参数学习能力的百叶与灯光的集成控制方法”, 中华人民共和国发明专利授权, 专利授权号: ZL 201310190381.X, 授权日2015.12.9.
[4] 夏俐, 赵千川, 赵寅, 程志金, 王福林, 宋芳婷, “基于学习用户行为的多维舒适度室内环境控制方法及系统”, 中华人民共和国发明专利授权, 专利授权号: ZL 201310294325.0, 授权日2016.1.20.
[5] 夏俐, 崔傲, 赵千川, 王福林, 管晓宏, “一种基于无线信号强度的设备自动配对方法”, 中华人民共和国发明专利申请, 专利申请号: CN 201510413641.4, 申请日2015.7.14.
[6] 夏俐, 王福林, 崔傲, 赵千川, 管晓宏, “智能开关及火线取电方法”, 中华人民共和国发明专利申请, 专利申请号: CN 201510417376.7, 申请日2015.7.15.
[7] 夏俐, 周芬芳, 赵千川, 董炜,孙新亚,“基于支持向量机的道岔故障诊断方法及系统”, 中华人民共和国发明专利申请, 专利申请号: CN 201610109726.8, 申请日2016.2.26.