Lijun Chen

Department of Computer Science
University of Colorado at Boulder
Boulder, CO 80309-0430
Office: ECCR 1B12
Tel: 303-492-4384
Fax: 303-492-1112
Email: lijun.chen[at]colorado.edu

I am an Associate Professor of Computer Science at the University of Colorado at Boulder. I received PhD in Control and Dynamical Systems from the California Institute of Technology, advised by Profs. John Doyle and Steven Low. I was a Research Scientist at the same institute before joining the University of Colorado.

Research interests

Optimization, control, and learning of networked systems, autonomous systems, and quantum systems
Learning and sequential decision-making
Integration of control and machine learning
Distributed optimization and algorithms
Quantum computing and networking
Game theory and its engineering applications
Theoretical foundation of complex engineering systems

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papers

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Papers

Incentivized Exploration of Non-Stationary Stochastic Bandits (full version), S. Chakraborty and L. Chen, ACC, 2024.
ROMA-iQSS: An Objective Alignment Approach via State-Based Value Learning and ROund-Robin Multi-Agent Scheduling, C.H. Lin, J.J. Koh, A. Roncone and L. Chen, ACC, 2024.
Optimal Power Flow with State Estimation In the Loop for Distribution Networks, Y. Guo, X. Zhou, C. Zhao, L. Chen and T Summers, IEEE Systems Journal, 2023.
An Online Joint Optimization-Estimation Architecture in Distribution Networks, Y. Guo, X. Zhou, C. Zhao, L. Chen, G. Hug and T. Summers, IEEE Transactions on Control Systems Technology, 2023.
Experience Report: Standards-Based Grading at Scale in Algorithms, L. Chen, J. Grochow, R. Layer and M. Levet, Proceedings of ACM Conference on Innovation and Technology in Computer Science Education (ITiCSE), 2022.
Utilizing Players Playtime Records for Churn Prediction: Mining Playtime Regularity, W. Yang, G. Yang, T. Huang, J. Zeng, J. Cai, L. Chen, S. Mishra and E. Liu, IEEE Transactions on Games, 14(2): 153-160, 2022.
Smoothed Least-Laxity-First Algorithm for Electric Vehicle Charging: Online Decision and Performance Analysis with Resource Augmentation, N. Chen, C. Paryoto, Y. Nakahira, L. Chen and S. Low, 13(3): 2209-2217, IEEE Transactions on Smart Grid, 2022.
Reverse and Forward Engineering of Local Voltage Control in Distribution Networks, X. Zhou, M. Farivar, Z. Liu, L. Chen and S. Low, IEEE Transactions on Automatic Control, 66(3): 1116-1128, 2021.
Economic Dispatch With Distributed Energy Resources: Co-Optimization of Transmission and Distribution Systems, X. Zhou, C.Y. Chang, A. Bernstein, C. Zhao and L. Chen, IEEE Control Systems Letters, 5(6): 1994-1999, 2021.
Channel Reciprocity in FDD Multiuser MIMO Systems by Super-resolution, W. Yang, Z. Feng, L. Chen, W. Xu and E. Liu, IEEE ICC, 2021.
Incentivized Exploration for Multi-Armed Bandits under Reward Drift, Z. Liu, H. Wang, F. Shen, K. Liu and L. Chen, Proceedings of AAAI Conference on Artificial Intelligence, 2020.
A Smoothed Analysis of Online Lasso for the Sparse Linear Contextual Bandit Problem, Z. Liu, H. Wang, B. Waggnor, E Liu and L. Chen, Workshop on Real World Experiment Design and Active Learning, ICML, 2020.
Cooperative Control of Mobile Robots with Stackelberg Learning, J. Koh, G. Ding, C. Heckman, L. Chen and A. Roncone, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2020.
Distributed Reinforcement Learning for Cooperative Multi-Robot Object Manipulation, G. Ding, J. Koh, K. Merchaert, B. Vanderborght, M. Nicotra, A. Roncone, C. Heckman and L. Chen, International Conference on Autonomous Agents and Multiagent Systems (AAMAS), 2020.
An Integrative Perspective to LQ and l_infinity Control for Delayed and Quantized Systems, Y. Nakahira and L. Chen, IEEE Transactions on Automatic Control, 65(11): 4781-4792, 2020.
Gradient-Based Multi-Area Distribution System State Estimation, X. Zhou, Z. Liu, Y. Guo, C. Zhao and L. Chen, IEEE Transactions on Smart Grid, 11(6): 5325-5338, 2020.
Online Stochastic Optimization of Networked Distributed Energy Resources, X. Zhou, E. Dall'Anese and L. Chen, IEEE Transactions on Automatic Control, 65(6): 2387-2401, 2020.
Accelerated Voltage Regulation in Multi-Phase Distribution Networks Based on Hierarchical Distributed Algorithm, X. Zhou, Z. Liu, C. Zhao and L. Chen, IEEE Transactions on Power Systems, 35(3): 2047-2058, 2020.
Signal-Anticipation in Local Voltage Control in Distribution Systems, Z. Liu, S. You, X. Zhou, G. Ding and L. Chen, IEEE Transactions on Smart Grid, 11(1):233-246, 2020.
Multi-Level Optimal Power Flow Solver in Large Distribution Networks, X. Zhou, Y. Chen, Z. Liu, C. Zhao and L. Chen, IEEE SmartGridComm, 2020.
Solving Optimal Power Flow for Distribution Networks with State Estimation Feedback, Y. Guo, X. Zhou, C. Zhao, Y. Chen, T Summers and L. Chen, ACC, 2020.
Towards Scalable Koopman Operator Learning: Convergence Rate and Distributed Implementation, Z. Liu, G. Ding, L. Chen and E. Yeung, ACC, 2020.
Correlation Between Personality and Social Interactions in Online Strategy Games, W. Yang, T. Huang, J. Zeng, Y. Tang, L. Chen, S. Mishra and E. Liu, IEEE Conference on Games (CoG), 2020.
Purchase Prediction for Paying Players in Free Online Games via Survival Analysis, W. Yang, T. Huang, J. Zeng, Y. Tang, L. Chen, S. Mishra and E. Liu, International Workshop on Big Data for Marketing Intelligence and Operation Management, 2019.
A Distributed Load Balancing Algorithm for Routing Tagged Vehicle Flows, G. Ding, Z. Liu and L. Chen, 2019.
Why Paying Players Left the Game? Mining and Understanding Paying Players' Churn Pattern via Hyperbolic Discounting in the Eearly Stage of a Free Online Game, W. Yang, J. Cai, J. Zeng, T. Huang, G. Yang, L. Chen, S. Mishra and E. Liu, 2019.
Demand Shaping in Cellular Networks, X. Zhou and L. Chen, IEEE Transactions on Control of Network Systems, 6(1):363-374, 2019.
Mining Player In-game Time Spending Regularity for Churn Prediction in Free Online Games, W. Yang, G. Yang, T. Huang, J. Zeng, J. Cai, L. Chen, S. Mishra and E. Liu, IEEE Conference on Games (CoG), 2019.
Hierarchical Distributed Voltage Regulation in Networked Autonomous Grids, X. Zhou, Z. Liu, W. Wang, C. Zhao, F. Ding and L. Chen, ACC, 2019.
Distributed Online Convex Programming for Collision Avoidance in Multi-agent Autonomous Vehicle Systems, G. Ding, H. Ravanbakhsh, Z. Liu, S. Sankaranarayanan and L. Chen, ACC, 2019.
Whales, Dolphins, or Minnows? Towards the Player Clustering in Free Online Games Based on Purchasing Behavior via Data Mining Technique, W. Yang, G. Yang, T. Huang, L. Chen and E. Liu, Proceedings of International Workshop on Big Data for Marketing Intelligence and Operation Management, 2018.
Super-resolution for Achieving Frequency Division Duplex (FDD) Channel Reciprocity, W. Yang, L. Chen and E. Liu, SPAWC, 2018.
Game-Theoretic Cooperative Lane Changing Using Data-Driven Models, G. Ding, S. Aghli, C. Heckman and L. Chen, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 2018.
Three-dimensional Super-resolution via Convex Programming, W. Yang, L. Chen and E. Liu, Asilomar Conference on Signals, Systems and Computers, 2018.
Decomposition of Nonlinear Dynamical Systems Using Koopman Operators, Z. Liu, S. Kundun, L. Chen and E. Yeung, ACC, 2018.
An Incentive-Based Online Optimization Framework for Distribution Grids, X. Zhou, E. Dall'Anese, L. Chen and A. Simonetto, IEEE Transactions on Automatic Control, 2018.
Stochastic Dual Algorithm for Voltage Regulation in Distribution Networks with Discrete Loads, X. Zhou, Z. Liu, E. Dall'Anese and L. Chen, SmartGridComm, 2017.
Proportional Control Applied to Dynamic Network Resource Allocation, Z. Liu and L. Chen, ACC, 2017.
Incentive-based Voltage Regulation in Distribution Networks, X. Zhou, E. Dall'Anese, K. Baker and L. Chen, ACC, 2017.
Optimizing Secondary User Performance Under Delay Constraint For Primary User, M. Salman and L. Chen, IEEE WCNC, 2017.
Reverse and Forward Engineering of Frequency Control in Power Networks, L. Chen and S. You, IEEE Transactions on Automatic Control, 2017.
Leveraging BLE and Social Trust to Enable Mobile In Situ Collaborations, K. Alanezi, R. Rafiq, L. Chen and S. Misha, ACM IMCOM, 2017.
Connecting Automatic Generation Control and Economic Dispatch from an Optimization View, N. Li, L. Chen and C. Zhao, IEEE Transactions on Control of Network Systems, 2016.
An Incremental Local Algorithm for Better Voltage Control in Distribution Networks, X. Zhou and L. Chen, IEEE CDC, 2016.
Load Balancing and Speed Scaling Interaction in Processor-Sharing Systems with Exponential Power Functions, G. Ding and L. Chen, Allerton Conference on Communication, Control and Computing, 2016.
Local Voltage Control in Distribution Networks: A Game-Theoretic Perspective, X. Zhou, J. Tian, L. Chen and E. Dall'Anese, NPAS, 2016.
The Weighted Sum Rate Maximization in MIMO Interference Networks: Minimax Lagrangian Duality and Algorithm, L. Chen and S. You, submitted for publication, 2013.
Pseudo-Gradient Based Local Voltage Control in Distribution Networks, X. Zhou, M. Farivar and L. Chen, Allerton Conference on Communication, Control, and Computing, 2015.
A New Perspective to Synchronization in Networks of Coupled Oscillators: Reverse Engineering and Convex Relaxation, X. Zhou and L. Chen, IFAC NecSys, 2015.
Local Voltage Control in Distribution Systems: An Incremental Control Algorithm, M. Farivar, X. Zhou and L. Chen, IEEE SmartGridComm, 2015.
On the Interaction between Load Balancing and Speed Scaling, L. Chen and N. Li, IEEE Journal on Selected Areas - Series on Green Communications and Networking, 2015.
Panorama: A Framework to Support Collaborative Context Monitoring on Co-Located Mobile Devices, K. Alanezi, X. Zhou, L. Chen and S. Misha, MobiCASE, 2015.
Demand Response Using Linear Supply Function Bidding, N. Li, L. Chen and M. Dahleh, IEEE Transactions on Smart Grid, 2015.
A New Algorithm for the Weighted Sum Rate Maximization in MIMO Interference Networks, X. Li, S. You, L. Chen, A. Liu and E. Liu, IEEE WCNC, 2015.
Demand Shaping in Cellular Networks, X. Zhou and L. Chen, Allerton Conference on Communication, Control, and Computing, 2014.
Reverse and Forward Engineering of Frequency Control in Power Networks, L. Chen and S. You, IEEE CDC, 2014.
Signal-anticipating in Local Voltage Control in Distribution Systems, J. Shihadeh, S. You and L. Chen, IEEE SmartGridComm, 2014.
Convex-Concave Procedure for Weighted Sum Rate Maximization in a MIMO Interference Network, S. You, L. Chen and E. Liu, IEEE Globecom, 2014.
Connecting Automatic Generation Control and Economic Dispatch from an Optimization View, N. Li, L. Chen, C. Zhao and S. H. Low, ACC, 2014.
Hybrid Cellular-MANETs in Practice: A Microblogging System for Smart Devices in Disaster Areas, C. Zheng, L. Chen, D. Sicker and X. Zeng, IEEE IWCMC, 2014.
Hybrid Cellular-MANETs: An Energy-Aware Routing Design, C. Zheng, L. Chen and D. Sicker, IEEE/IFIP WONS, 2014.
Equilibrium and Dynamics of Local Voltage Control in Distribution Systems, M. Farivar, L. Chen and S. Low, IEEE CDC, 2013.
Self-Organized Context-Aware Hybrid MANETs, C. Zheng, D. Sicker and L. Chen, IEEE/IFIP WONS, 2013.
Congestion Control for Multicast Flows with Network Coding, L. Chen, T. Ho, M. Chiang, S. H. Low and J. C. Doyle, IEEE Transactions on Information Theory, 2012.
Exact Convex Relaxation for Radial Networks using Branch Flow Models, N. Li, L. Chen and S. H. Low, IEEE SmartGridComm, 2012.
Demand response in radial distribution networks, N. Li, L. Gan, L. Chen and S. H. Low, Asilomar Conference, 2012.
An Optimization Based Demand response in radial distribution networks, N. Li, L. Chen, L. Gan and S. H. Low, SGComm Workshop, 2012.
Distributed Distortion Optimization for Correlated Sources, T. Cui, L. Chen and T. Ho, IEEE Transactions on Communications, 2012.
Optimal Demand Response: Problem Formulation and Deterministic Case, L. Chen, N. Li, L. Jiang and S. H. Low, Control and Optimization Theory for Electric Smart Grids, Aranya Chakrabortty and Marija Ilic (Eds.), Springer, 2012.
Robustness, Optimization, and Architecture, F. Chandra, D. F. Gayme, L. Chen and J. C. Doyle, European Journal of Control, 2011.
Optimal Demand Response Based on Utility Maximization in Power Networks, N. Li, L. Chen and S. H. Low, IEEE PESGM, 2011.
On the Interaction between Load Balancing and Speed Scaling, L. Chen, N. Li and S. H. Low, ITA Workshop, 2011.
Random Access Game and Medium Access Control Design, L. Chen, S. H. Low and J. C. Doyle, IEEE/ACM Transactions on Networking, 2010.
Two Market Models for Demand Response in Power Networks, L. Chen, N. Li, S. H. Low and J. C. Doyle, IEEE SmartGridComm, 2010.
Cross-Layer Design in Multihop Wireless Networks(Invited), L. Chen, S. H. Low and J. C. Doyle, Special Issue on Wireless for the Future Internet, Computer Networks Journal, 2010.
On Distributed Scheduling in Wireless Networks Exploiting Broadcast and Network Coding, T. Cui, L. Chen and T. Ho, IEEE Transactions on Communications, 2010.
Joint Congestion Control and Media Access Control Design for Wireless Ad Hoc Networks, L. Chen, S. H. Low and J. C. Doyle, Proceedings of IEEE Infocom, March 2005.
Cross-layer Congestion Control, Routing and Scheduling design in Ad Hoc Wireless Networks, L. Chen, S. H. Low, M. Chiang and J. C. Doyle, Proceedings of IEEE Infocom, April 2006.
Dual Scheduling Algorithm in a Generalized Switch: Asymptotic Optimality and Throughput Optimality, L. Chen, S. H. Low and J. C. Doyle, in High-Performance Packet Switching Architectures, Itamar Elhanany and Mounir Hamdi (Eds.), Springer, August 2006.
On Asymptotic Optimality of Dual Scheduling Algorithm in A Generalized Switch, L. Chen, S. H. Low and J. C. Doyle, Proceedings of WiOpt, April 2006.
Contention Control: A Game-theoretic Approach, L. Chen, S. H. Low and J. C. Doyle, Proceedings of IEEE CDC, December 2007.
A Game-Theoretic Model for Medium Access Control, L. Chen, T. Cui, S. H. Low and J. C. Doyle, Proceedings of International Wireless Internet Conference, October 2007.
Optimization Based Rate Control for Multicast with Network Coding, L. Chen, T. Ho, S. H. Low, M. Chiang and J. C. Doyle, Proceedings of IEEE Infocom, May 2007.
Distributed Optimization in Wireless Networks Using Broadcast Advantage, T. Cui, L. Chen and T. Ho, Proceedings of IEEE CDC, December 2007.
Optimization Based Rate Control for Multicast with Network Coding: A Multipath Formulation, T. Cui, L. Chen and T. Ho, Proceedings of IEEE CDC, December 2007.
Opportunistic Source Coding for Data Gathering in WirelessSensor Networks (Best Paper Award), T. Cui, L. Chen, T. Ho, S. Low and L. Andrew, Proceedings of IEEE Conference on Mobile Ad-hoc and Sensor Systems, October 2007.
On Distributed Distortion Optimization for Correlated Sources with Network Coding, T. Cui, T. Ho and L. Chen, Proceedings of IEEE ISIT, June 2007.
Distributed Minimum Cost Multicasting with Lossless Source Coding and Network Coding, T. Cui, T. Ho and L. Chen, Proceedings of IEEE CDC, December 2007.
Energy Efficient Opportunistic Network Coding for Wireless Networks, T. Cui, L. Chen and T. Ho, Proceedings of IEEE Infocom, April 2008.
A Game-Theoretic Framework for Medium Access Control, T. Cui, L. Chen and S. H. Low, IEEE Journal of Selected Areas on Communications, September 2008.

Bloch WaveOscillation and Coulomb Blockade in Mesoscopic Electric Circuits, B. Chen, L. Chen and R. Han, Physics Letters A, 246:446-450, 1998.
Josephson Like Effects in the Mesoscopic Electric Circuit, B. Chen, L. Chen and R. Han, Communications in Theoretical Physics, 31:301, 1999.