Advanced Networks Colloquium: Yiguang Hong, "Social opinion dynamics--Agreement or disagreement"

Friday, December 9, 2016
11:00 a.m.
1146 AV Williams Building; Roundtable Thursday Dec. 8, 2 pm, Room 2120 AV Williams (UMIACS conference room)

Social opinion dynamics: Agreement or disagreement

Yiguang Hong
Academy of Mathematics and Systems Science
Chinese Academy of Sciences

Roundtable Thursday Dec. 8, 2 pm, Room 2120 AV Williams (UMIACS conference room)

Abstract
The talk mainly focuses on the recent achievement about analysis and "control" of bounded confidence opinion dynamics. We introduce some well-known bounded-confidence opinion models of social networks (such as the Hegselmann-Krause model and Deffuant-Weisbuch model), and the related technical challenges. Note that the models are highly nonlinear and whose interaction topologies are time-varying and state-dependent. Therefore, the analysis for such models are usually much more difficult than that for the opinion models described by state-independent graphs. We first demonstrate two basic disagreement phenomena: fragmentation and fluctuation, and give strict mathematical analysis for opinion disagreement resulting from some opinion exchange rules. Then we discuss the "control" of opinion dynamics, called opinion intervention, in order to alter opinion evolution in social networks, and theoretically prove that simple noise-injection strategies are effective to enhance the opinion agreement.

Biography
Yiguang Hong received his B.S. and M.S. degrees from Peking University, China, and the Ph.D. degree from the Chinese Academy of Sciences (CAS), China. He is currently a Professor in Academy of Mathematics and Systems Science, CAS, and serves as the Director of Key Lab of Systems and Control, CAS and the Director of the Information Technology Division, National Center for Mathematics and Interdisciplinary Sciences, CAS.  His current research interests include nonlinear control, multi-agent systems, distributed optimization and social networks. Prof. Hong serves as Editor-in-Chief of Control Theory and Technology and Deputy Editor-in-Chief of Acta Automatica Sinca.   He also serves or served as Associate Editors for many journals including the IEEE Transactions on Automatic Control, IEEE Transactions on Control of Network Systems, IEEE Control Systems Magazine, and Nonlinear Analysis: Hybrid Systems. He is a recipient of the Guang Zhaozhi Award at the Chinese Control Conference, Young Author Prize of the IFAC World Congress, Young Scientist Award of CAS, and the Youth Award for Science and Technology of China, and the National Natural Science Prize of China.   One of his papers became a Most Cited Article of Automatica during 2006-2010, with current citations over 1000 (according to google scholar).

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