----- Forwarded Message ----- From: "Yusong Rogers" <[email protected]> To: "efmh seminar" <[email protected]>, [email protected], [email protected] Sent: Thursday, May 5, 2011 11:02:51 AM Subject: EFMH Spring 2011 Seminar Series, Monday, 5/9, 12:15pm, Y2E2 111: “Detection and modeling of simultaneous random events from large sensor data streams”
************** EFMH Spring 2011 Seminar Series ************** Date: Monday, May 9, 2011 Time: 12:15pm-1:15pm Location: Y2E2 111 Guest speaker: Professor Ram Rajagopal Civil and Environmental Engineering Dept., Stanford University Title: Detection and modeling of simultaneous random events from large sensor data streams Abstract: Detection of simultaneous random events arise in a variety of applications such as detecting faulty sensors in a network, contaminant detection and source localization and inference of individual decisions in a social network. These problems exhibit many unique challenges: (a) observed sensor data sequences maybe influenced by more than one event; (b) only a subset of all data sequences maybe observed for detecting each event occurrence and (c) simple and efficient distributed algorithms maybe required. We propose a novel graphical model based approach that captures these features. The model represents the statistical independence relationships among the observed data sequences and event indicators as well as the data exchange constraints. Based on this model we develop various exact and approximate message passing inference algorithms that achieve different false alarm and detection delay tradeoffs. In particular we show inference sharing local decisions results in substanti ally smaller delay at a price of small increase in false alarm. We develop new sequential analysis techniques that maybe of independent interest to analyze such problems in detail. If time permits, we also discuss how events can be forecasted from prior detected events. ************************************** Below is a link to the sign up sheet for individual meetings with our speaker. There is a link in the document that guides you to the details of the talk given by Professor Ram Rajagopal on May 9. Please sign up to meet with Prof. Rajagopal if you are interested. https://docs.google.com/document/d/1OV9Bgih8Uercqewg-G70CaawQBWwM4PawN-iSKii6aE/edit?hl=en&authkey=CIPgo5QL ~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~. Ms. Yusong Rogers Administrative Associate Environmental Fluid Mechanics & Hydrology Program Department of Civil & Environmental Engineering Stanford University Y2E2, Room 126 m/c 4020 473 Via Ortega Stanford, CA 94305 Tel: 650 723-4372 Fax: 650 725-9720 --++**==--++**==--++**==--++**==--++**==--++**==--++**== efmh_seminar mailing list [email protected] https://mailman.stanford.edu/mailman/listinfo/efmh_seminar --++**==--++**==--++**==--++**==--++**==--++**==--++**==--++**== efmhall mailing list [email protected] https://mailman.stanford.edu/mailman/listinfo/efmhall --++**==--++**==--++**==--++**==--++**==--++**==--++**==--++**== efmhphd mailing list [email protected] https://mailman.stanford.edu/mailman/listinfo/efmhphd
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