- Head of Data Strategies Group, Citadel LLC
- New York, NY, USA
- ai@jianxu.net
- +1 (574) 0485-7282
- xyjprc
Who am I?
A curious data miner
who cannot fall asleep upon new findings — from trillion-scale trading signals to higher-order patterns in complex networks.
A creative programmer
who loves building tools — from award-winning network visualization software to smart home automation and custom financial news readers.
A critical thinker
who leads teams by asking the right questions, from data methodology standards to firm-wide research strategy.
Research Interest
Data mining and network science
Applications
Using network models and data science to solve interdisciplinary problems in complex systems such as financial market (e.g., information diffusion and trading behavior), social network (e.g., online / mobile phone social interactions), and biology (e.g., species invasions via global shipping) in close collaboration with domain experts.
Theory
Network representation of various types of data; in particular, methods and influences of embedding rich information such as higher-order dependencies into networks.
What's new
Professional Experience
Publications
Representing higher-order dependencies in networks
Science Advances
J. Xu, T.L. Wickramarathne, N.V. Chawla
In the top 5% of all research outputs scored by Altmetric, 97th percentile attention score compared to outputs of the same age, featured in 8 news outlets
Improving management of aquatic invasions by integrating shipping network, ecological, and environmental data: data mining for social good
KDD 2014
J. Xu, T.L. Wickramarathne, N.V. Chawla, E.K. Grey, K. Steinhaeuser, R.P. Keller, J.M. Drake, D.M. Lodge
Catching fire: an anatomy of information diffusion using Retweets
Northern Finance Association Conference 2014
Research in Behavioral Finance Conference 2014
10th Annual Central Bank Workshop on the Microstructure of Financial Markets 2014
N.V. Chawla, Z. Da, J. Xu, M. Ye
Human interactive patterns in temporal networks
IEEE Transactions on Systems, Man, and Cybernetics - Part A: Systems and Humans
Y.Q. Zhang, X. Li, J. Xu, A.V.Vasilakos
HoNVis: Visualizing and Exploring Higher-Order Networks
IEEE PacificVis 2017
J. Tao, J. Xu, C. Wang, N.V. Chawla
Video demo available at HigherOrderNetwork.com
Mining Features Associated with Effective Tweets
International Conference on Advances in Social Networks Analysis and Mining (ASONAM) 2017
J. Xu, N.V. Chawla
Efficient modeling of higher-order dependencies in networks: from algorithm to application for anomaly detection
EPJ Data Science, 2020
M. Saebi, J. Xu, L.M. Kaplan, B. Ribeiro, N.V. Chawla
Network analysis of ballast-mediated species transfer reveals important introduction and dispersal patterns in the arctic
Scientific Reports, 2020
M. Saebi, J. Xu, S.R. Curasi, E.K. Grey, N.V. Chawla, D.M. Lodge
Higher-order patterns of aquatic species spread through the global shipping network
PLOS ONE, 2020
M. Saebi, J. Xu, E.K. Grey, D.M. Lodge, J.J. Corbett, N. Chawla
Structural Diversity and Homophily: A Study Across More Than One Hundred Big Networks
ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD) 2017
J. Xu, N.V. Chawla
Skills
Programming
Python and SQL for data mining; C# for graphical interface; C and Common Lisp for high performance computing
Big Data
Snowflake, BigQuery, Vertica, and Spark for trillion-scale database queries; Airflow and Linux shell scripts for managing parallelized jobs on Amazon S3 and distributed systems.
Tools
Tableau and Gephi for visualization; Bloomberg Terminal for trading; ArcGIS for geographical information system; NetworkX for network analysis; JavaScript and Flask for web app development; Requests and Selenium for web scraping.
Software packages
Education
Honors & Awards
Hobbies
Photography
Flute
Amateur Lv. 9 "Excellent"
Trivia
DIY projects
Instead of using smart speakers like Alexa and subscribe to podcasts, I built my own "radio alarm", which everyday at 8AM, it starts by telling my girlfriend how much I love her (with a different phrase everyday), plays our favorite music, reads the weather forecast, and reads the top financial and tech news from my RSS feeds with a TTS engine.
I also enjoy automating my home, from auto feeders for cats and fish, to the power switches behind my TV.
