I am an Assistant Professor at the Stanford Graduate School of Business, and Assistant Professor by courtesy at the Electrical Engineering Department, Stanford University.
My research seeks to understand fundamental design principles and architectural guidelines for large-scale stochastic decision-making and optimization, with applications in queueing networks, healthcare, privacy and statistical learning.
Reinforcement with fading memories, [paper]
K. Xu and S. Y. Yun, preprint (2017).
Delay-Predictability tradeoffs in reaching a secret goal, [paper]
J. N. Tsitsiklis and K. Xu, to appear in Operations Research, 2017.
On the capacity of information processing systems, [paper]
L. Massoulié and K. Xu, to appear in Operations Research, 2017.
Preliminary version: Proceedings of Conference on Learning Theory (COLT), New York, June 2016. [ link ]
Flexible queueing architectures, [paper]
J. N. Tsitsiklis and K. Xu, Operations Research, 65(5): 1398–1413, 2017.
Using future information to reduce waiting times in the Emergency Department via diversion,
[paper] [news article]
K. Xu and C. W. Chan, Manufacturing & Service Operations Management (MSOM), 18(3):314 - 331, 2016.
Necessity of future information in admission control, [paper]
K. Xu, Operations Research, 63(5): 1213-1226, 2015.
Queueing with future information, [paper]
J. Spencer, M. Sudan, and K. Xu, Annals of Applied Probability, 24(5): 2091-2142, 2014.
The optimal admission threshold in observable queues with state dependent pricing, [paper]
C. Borgs, J. T. Chayes, S. Doroudi, M. Harchol-Balter, and K. Xu,
Probability in the Engineering and Informational Sciences, 28(1): 101-119, 2014.
On the power of (even a little) resource pooling, [paper, correction]
J. N. Tsitsiklis and K. Xu, Stochastic Systems, 2: 1-66, 2012.
First Place, INFORMS George E. Nicholson 2011 Student Paper Competition [link]
Queueing system topologies with limited flexibility, [extended technical report]
J. N. Tsitsklis and K. Xu, Proceedings of ACM SIGMETRICS , Pittsburg, June 2013.
Best Paper Award , and Kenneth C. Sevcik Outstanding Student Paper Award [link]
Self-synchronizing properties of CSMA wireless multi-hop networks, [paper]
K. Xu, O. Dousse, and P. Thiran, Proceedings of ACM SIGMETRICS , New York, June 2010.
PAPR reduction for beamforming OFDM via constellation-beam modification, [paper]
K. Xu and D. L. Jones, Proceedings of the 43rd Asilomar Conference on Signals, Systems and Computers, Pacific Grove, November 2009.
Promoting undergraduate research in ECE (PURE): Connecting undergraduates with graduate research mentors, [paper]
K. Xu and E. Van Ruitenbeek, Proceedings of American Society for Engineering Education (ASEE) Annual Conference & Exposition, June 2009. [PURE's website] [new articles: 1, 2, 3]
Beamforming MISO-OFDM PAPR reduction: A Space-user perspective, [paper]
K. Xu, T. Thomas, and D. L. Jones, Technical Report, 2009.
On the power of (even a little) flexibility in dynamic resource allocation, [thesis]
Ph.D. Thesis, Massachusetts Institute of Technology, June 2014,
supervised by Prof. John N. Tsitsiklis.
Recipient of 2014 Dimitris N. Chorafas Foundation award [link]
On the power of centralization in distributed processing, [thesis]
S.M. Thesis, Massachusetts Institute of Technology, June 2011
supervised by Prof. John N. Tsitsiklis.
First Place, Ernst A. Guillemin Thesis Award for Best S.M. Thesis in Electrical Engineering
For the 2012 - 2013 academic year, I am a graduate representative on the MIT Council on Educational Technology (MITCET), and the Institute-Wide Task Force on the Future of MIT Education. Earlier, I served as co-Chair of the 2010 MIT Graduate Orientation during 2010 - 2011, a legislative advocate in the MIT Graduate Student Legislative Action Subcommittee during 2010 - 2011, and a graduate representative on the MIT Corporation Joint Advisory Committee on Institute-Wide Affairs (CJAC) during 2011 - 2012.
I enjoy Brazilian jiu-jitsu, rock climbing, and was a member of the MIT Ballroom Dance Team (MITBDT), where I competed in the international Latin style.