Xi (Alex) Chen, PhD
NLP Research Scientist,
Nuance Communications,
Montreal, QC, Canada
Short Bio
Xi Chen is currently an NLP research scientist at Nuance Communications Inc., working on data-driven NLP solutions for virtual assistance applications on smart devices. He is passionate about machine learning, and its applications in NLP, self-driving, smart systems and cyber-physical systems. He achieved his PhD degree under the supervision of Prof. Xue Liu at School of Computer Science, McGill University. He also served as a research scientist at aerial.ai. He received both M.Eng. and B.S. degrees from Department of Electronic Engineering, Shanghai Jiao Tong University.
| News [2017.09] Joined Nuance as an NLP research scientist [2017.05] Award: Best-in-Session-Presentation Award in the indoor localization session of IEEE INFOCOM 2017. Many thanks to the session chair and the audience! (presentation slides) [2017.04] Paper:"AdaSharing: Adaptive Data Sharing in Collaborative Robots", accepted by IEEE Transactions on Industrial Electronics. [2017.01] Teaching: I am teaching a graduate-level course "Computer Networks" (COMP535), at McGill this semester. |
Testbeds and demos
- VSmart is a DSRC-enabled smart vehicle testbed established at CPS Lab, McGill University, and is partially supported by General Motors Company. (Testbed website, YouTube videos and slides)
- Aerial can tell who you are, where you are and what you are doing, even if you don't carry any wearable devices, smartphones, nor cameras. As long as there are standard Wi-Fi signals in the air, aerial is good to go. (Check our Project website and YouTube video to see the magic!)
Publications
Book & Journal
- Yuan Yao, Xi Chen, Lei Rao, Xue Liu, and Xingshe Zhou, "LORA: Loss Differentiation Rate Adaptation Scheme for Vehicle-to-Vehicle Safety Communications", in IEEE Transactions on Vehicular Technology (TVT), vol. 66, no. 3, pp. 2499-2512, 2017.
- Hang Luo, Xue Liu, Xi Chen, Ting Long, and Ronghua Jiang, "Software Reliability Analysis Using Weakest Preconditions in Linear Assignment Programs", in IEEE Transactions on Software Engineering (TSE) vol. 42, no. 9, pp. 866-885, Sep. 1, 2016.
- Xue Liu, Xi Chen and Fanxin Kong, "Utilization Control and Optimization of Real-Time Embedded Systems", Foundations and Trends® in Electronic Design Automation: Vol. 9: No. 3, pp 211-307, 2015.
- Xi Chen, Lei Rao, Yuan Yao, Xue Liu and Fan Bai, "The Answer is Rolling on Wheels: Modeling and Performance Evaluation of In-cabin Wi-Fi Communications," in Elsevier Journal of Vehicular Communications, vol. 2, no. 1, pp. 13-26, Jan. 2015. (pdf)
- Zhenzhi Qian, Xiaohua Tian, Xi Chen, Wentao Huang, and Xinbing Wang, "Multicast Capacity in MANET with Infrastructure Support," in IEEE Transactions on Parallel and Distributed Systems (TPDS), vol.25, no.7, pp.1808 - 1818, July 2014.
Conference
- Xi Chen, Chen Ma, Michel Allegue, and Xue Liu, "Taming the Inconsistency of Wi-Fi Fingerprints for Device-Free Passive Indoor Localization," in Proc. of the 36th Annual IEEE International Conference on Computer Communications (INFOCOM 2017), pp. 1-9, Atlanta, GA, 2017.(pdf) (ppt)
- Xi Chen, Lei Rao, Qiao Xiang, Xue Liu, and Fan Bai, "DRIVING: Distributed Scheduling for Video Streaming in Vehicular Wi-Fi Systems," in Proc. of ACM Multimedia Conference 2016 (ACM MM 2016), pp. 858-867, Amsterdam, Netherlands, 2016. (pdf)(ppt)
- Xi Chen, Linghe Kong, Xue Liu, Lei Rao, Fan Bai and Qiao Xiang, "How Cars Talk Louder, Clearer and Fairer: Optimizing the Communication Performance of Connected Vehicles via Online Synchronous Control," in Proc. of the 35th Annual IEEE International Conference on Computer Communications (INFOCOM 2016), pp. 1-9, San Francisco, CA, U.S.A., 2016. (pdf)(ppt)
- Landu Jiang, Xi Chen, and Wenbo He, "SafeCam: Analyzing Intersection-Related Driver Behaviors using Multi-Sensor Smartphones," in Proc. of the 14th IEEE International Conference on Pervasive Computing and Communications (PerCom 2016), pp. 1-9, Sydney, Australia, 2016. (pdf)
- Qiao Xiang, Xi Chen, Linghe Kong, Lei Rao and Xue Liu, "Data Preference Matters: A New Perspective of Safety Data Dissemination in Vehicular Ad Hoc Networks," in Proc. of the 34th Annual IEEE International Conference on Computer Communications (INFOCOM 2015) , pp. 1149 - 1157, Hong Kong, China, 2015. (pdf)
- Linghe Kong, Xi Chen, Xue Liu and Lei Rao, “FINE: Frequency-divided Instantaneous Neighbors Estimation System in Vehicular Networks,” in Proc. of the 13rd IEEE International Conference on Pervasive Computing and Communications (PerCom 2015) , pp. 172 - 177, St. Louis, Missouri, USA, 2015.
- Qiao Xiang, Fanxin Kong, Xue Liu, Xi Chen, Linghe Kong and Lei Rao, "Auc2Charge: An Online Auction Framework for Eectric Vehicle Park-and-Charge," in Proc. of the 2015 ACM Sixth International Conference on Future Energy Systems (E-energy 2015), pp. 151-160, Bangalore, India, 2015.
- Kai Xiong, Xi Chen, Lei Rao, Xue Liu and Yuan Yao, “Solving the Performance Puzzle of DSRC Multi-Channel Operations,” in Proc. of IEEE International Conference on Communications 2015 (ICC 2015), pp.3843-3848, 8-12, London, UK, 2015.
- Xi Chen, Lei Rao, Xue Liu, Hongxing Li and Xinbing Wang, “Right Time in Right Place: Taming Workload Balancing Oscillations in Internet Data Center Cost Management,” in Proc. of the 5th IEEE International Green Computing Conference (IGCC 2014), pp. 1 - 10, Dallas, TX, 2014.
- Zhonghao Sun, Fanxin Kong, Xue Liu, Xingshe Zhou and Xi Chen, "Intelligent Joint Spatio-temporal Management of Electric Vehicle Charging and Data Center Power Consumption", in Proc. of the 5th IEEE International Green Computing Conference (IGCC 2014), pp. 1-8, Dallas, TX, 2014.
- Xi Chen, Wentao Huang, Xinbing Wang, and Xiaojun Lin, “Multicast Capacity in Mobile Wireless Ad Hoc Network with Infrastructure Support,” in Proc. of the 31st Annual IEEE International Conference on Computer Communications (INFOCOM 2012), Orlando, FL, 2012, pp. 271-279.
- Xi Chen, Haike Yi, Hanwen Luo, Hui Yu, and Hailong Wang, "A novel CQI calculation scheme in LTELTE-A systems," in Proc. of 2011 International Conference on Wireless Communications and Signal Processing (WCSP), Nanjing, China, pp. 1-5, 2011.
Under Review
- Xi Chen, Linghe Kong, and Xue Liu, "DisCo: Distributed Coordination of Transmission Power for High-Performance Vehicle Connectivity," under review of ACM Mobihoc 2017.
- Xi Chen, Qiao Xiang, Linghe Kong, and Xue Liu, "RadioLoc: Enabling All-Terrain Vehicle Localization with FM Radio Signals," under view of the Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies (IMWUT&UbiComp).
- Xi Chen, Linghe Kong, Xue Liu, Lei Rao, Fan Bai and Qiao Xiang, “Optimizing the Communication Performance of Connected Vehicles via Online Synchronous Control” under submission to IEEE Transactions on Mobile Computing (TMC).
- Xi Chen, Lei Rao, Qiao Xiang, Xue Liu, and Fan Bai, "A Distributed Scheduling Framework for Video Streaming in Vehicular Wi-Fi Systems," under submission to IEEE Transactions on Multimedia (TMM).
Projects involved
- DSRC: Performance enhancement of vehicular communications (Dedicated Short Range Communication and mobile Wi-Fi) (2012 - present, McGill and General Motors);
- Wi-Fi on wheels: Mobile Wi-Fi APs for In-vehicle Infotainment (2013 - present, McGill and General Motors);
- Aerial: Device-free human activity recognition via wireless signals (2015 - present, Tandemlaunch, Aerial.ai and McGill);
- Electric Vehicles: Optimization of energy-efficient EVs (2014 - present, CPS lab, McGill);
- Cloud Energy: Energy/cost management for cloud computing systems in smart grid (2012 - present, CPS lab, McGill);
- Skysensor: Real-time virtual link scheduling in AFDX network (2012 - 2013, McGill and Sponsors);
- Limited feedback design of LTE/LTE-A system (2009-2012, SJTU and Sharp Co.);
- Capacity scaling in mobile Ad Hoc network (2011-2012, SJTU).
Courses taken
| Ph.D. Courses | Grade |
| Machine Learning | 4.0/4.0 |
| Information Structures | 4.0/4.0 |
| Probabilistic Analysis of Algorithm | 4.0/4.0 |
| Advanced Topics Systems | 4.0/4.0 |
Miscellaneous
Prof. Luc Devroye's library (open to all McGill students)
