Jian Xu Email & Phone Number

Miami, Florida, Us

Data Strategies Group, Citadel.✔ Managed the alternative data featurization team and developed alpha-generating features from trillion-scale noisy data sets. Research outputs (including forecasts, machine learning algorithms, and web apps) directly impact trading decisions of investment teams in equities, fixed income, commodities, and more.✔ Pioneered extensive research on the firm's most important alternative data sets, and became the firm's widely-acknowledged expert on representative panel construction, bias correction, cohort comparison, and many more. Speaker at Citadel's annual alternative data summit since 2018.✔ Built the alternative data observatory which provides a real-time and comprehensive read on economic activities, became the one-stop-shop for alternative data signals, and is used weekly by >30% members of the Citadel Investment Group.

Miami, Florida, Us

Notre Dame, In, Us

Interdisciplinary Center for Network Science and Applications. Advisor: Prof. Nitesh ChawlaDissertation: Modeling Big Data as Networks: New Methods and Insights✔ Designed the higher-order network construction algorithm that overcomes the limitation of the widely-used first-order network, and demonstrated real-world applications on clustering, ranking, and anomaly detection. Published a first-author paper in the high-impact AAAS interdisciplinary journal Science Advances, hosted a full-day hands-on tutorial at the top data mining conference ACM SIGKDD in London, and organized a full-day workshop at the top network science conference NetSci in Paris.✔ Designed a network approach to inform the management of invasive species through global shipping using multiple data sources (global ship movements, ecological and environmental data, etc.) in collaboration with other computer scientists, ecologists and policy experts, resulting in a paper in the top data mining conference ACM SIGKDD as first author.✔ Modeled information diffusion across a large network of retail traders by tracking retweets of breaking news, being one of the first to quantitatively evaluate the influence of social network dynamics (as opposed to traditional media) on retail trading, resulting in a finance paper and a U.S. provisional patent.

Network Science Collaborative Technology Alliance✔ Designed the workflow of HONVis, the state-of-the-art interactive visualization software of higher-order networks, and published the design on IEEE PacificVis.

Armonk, New York, Ny, Us

Smarter Urban Dynamics group✔ Performed data cleaning and analysis of 40 million entries of 200 thousand users' cellular data usage records involving heterogeneous information from demographics to locations.✔ Identified customer segmentations based on temporal patterns of cellular data usage, and communicated proactive customer care strategies with telecom representatives.

上海, 上海市, Cn

Adaptive Networks and Control LabAdvisor: Prof. Xiang Li✔ Developed a software package to analyze human interactive patterns using temporal networks, which later obtained software copyright. ✔ Revealed common dominant interaction patterns in different contexts, resulting in a journal paper in IEEE Transactions on Systems, Man, and Cybernetics.

Doctor Of Philosophy (Phd), Computer Science

B. Sc, Electronics Engineering

High School