新任助教講演会(Lectures from New Assistant Professors)

日時(Datetime) 令和3年6月21日(月)3限 (13:30 -- 15:00), 2021/06/21, Monday
場所(Location) L2
司会(Chair) 藤本 雄一郎(Yuichiro Fujimoto)

講演者(Presenter) 大内 啓樹(Hiroki Ouchi), 自然言語処理学研究室 (Natural Language Processing Lab.)
題目(Title) Walking Around Language Structures
概要(Abstract) I am interested in structures of natural languages. I have worked on designing computational models that have the ability to recognize language structures from different three perspectives: (i) Accuracy, (ii) Robustness and (iii) Explainability. In this lecture, I will briefly introduce my research from the three perspectives.

講演者(Presenter) 原 崇徳 (Takanori Hara), 大規模システム管理研究室 (Large-Scale Systems Management Lab.)
題目(Title) Selfish Yet Optimal Routing by Adjusting Perceived Traffic Information of Road Networks
概要(Abstract) Traffic congestion in urban areas causes economic and time loss. Such traffic congestion comes from selfish routing, where users aim to minimize their own travel time. Even if a navigation system provides them with the recommended route, they may not obey the route, due to dissatisfaction with the expected travel time. In this presentation, inspired by the concept of Nudge, we propose the selfish yet optimal routing where all users rationally aim to minimize their own travel time but social optimal routing emerges from such selfish routing by adjusting their perceived traffic information appropriately. We propose a scheme to derive nudging traffic information that fills the gap between selfish routing criterion and altruistic one by internalizing the marginal cost into the perceived traffic information, which unconsciously results in the optimal routing. Through the numerical experiments, we demonstrate that the selfish yet optimal routing achieves almost the same performance compared with the optimal routing. In addition, the selfish yet optimal routing can reduce the travel time by 19.1% compared with the notification of actual traffic information, in case of the central-area road network of Nagoya city, Japan