[Eoas-seminar] [Seminar-announce] Scientific Computing Colloquium with Bowen Li

[eoas-seminar at lists.fsu.edu]

"Fast Outlier Detection in Oblique Subspace"

Bowen Li
Dept. of Computer Science,
Florida State University (FSU)

Please feel free to forward/share this invitation with other groups/disciplines that might be interested in this talk/topic. All are welcome to attend.

NOTE: In-person attendance is requested in our 499 Dirac Science Library (DSL) Seminar Room. Zoom access is intended for external (non-departmental) participants only.

https://fsu.zoom.us/j/94273595552
Meeting # 942 7359 5552

🎦 Colloquium recordings will be made available here, https://www.sc.fsu.edu/colloquium<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sc.fsu.edu%2Fcolloquium&data=05%7C02%7Csc-seminar-announce%40lists.fsu.edu%7Ca893869c25ca4cb9c5b108de101db13c%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638965916859528297%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=XKbz5dgNMIr1927oXBjY0%2F%2FRLMRP6uZgJusAwFKniKM%3D&reserved=0>


Wednesday, Oct 22, 2025, Schedule:

* 3:00 to 3:30 PM Eastern Time (US and Canada)
☕ Nespresso & Teatime - 417 DSL Commons

* 3:30 to 4:30 PM Eastern Time (US and Canada)
🕟 Colloquium - 499 DSL Seminar Room


Abstract:
Subspace outlier detection is a fundamental data mining task for high-dimensional data. The existing hashing-based methods only effectively identify outliers in axis-parallel subspaces but fail on arbitrary-shaped, schema-less data such as time series and graphs. We present OS-Hash (Oblique Subspace Hashing), a linear-time, constant-space solution that defines oblique subspaces based on pairwise object proximity, without requiring explicit multidimensional representations. By hashing data into arbitrarily oriented subspaces, OS-Hash builds efficient histograms for outlier detection across diverse data types and extends naturally to the data stream setting.


Additional colloquium details can be found here,
https://www.sc.fsu.edu/news-and-events/colloquium/1886-colloquium-with-bowen-li-2025-10-22<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sc.fsu.edu%2Fnews-and-events%2Fcolloquium%2F1886-colloquium-with-bowen-li-2025-10-22&data=05%7C02%7Csc-seminar-announce%40lists.fsu.edu%7Ca893869c25ca4cb9c5b108de101db13c%7Ca36450ebdb0642a78d1b026719f701e3%7C0%7C0%7C638965916859552366%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=VhXHGUy8QGhh%2FX5SPLzfMVBWksWwHdvdWKKSlofe1RY%3D&reserved=0>
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