이상완 교수
Sang Wan Lee
KAIST 김재철AI대학원 · 컴퓨터과학
연구실 소개
이상완 교수의 연구실은 뇌 기반의 의사결정 메커니즘과 신경망 구조를 기반으로 한 지능형 시스템 설계에 중점을 두고 있습니다. 특히 보상과 처벌 회피 학습의 신경 기반 메커니즘, 기저 구조체의 신경세포 활동 동역학, 그리고 복잡한 최적화 문제(예: TSP)에 응용되는 딥리어닝 기반 의사결정 시스템을 연구하고 있습니다. 또한, 실시간으로 안정적으로 동작하는 서비스 로봇 시스템의 설계 및 검증 프레임워크 개발을 통해 뇌 기반 지능을 실제 응용 환경에 구현하고자 합니다.
연구 현황
연구 성과 추이
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
주요 논문
6Abstracts of the 25th Annual Computational Neuroscience\nMeeting: CNS-2016\nSeogwipo City, Jeju-do, South Korea. 2–7 July 2016
Background: While there is good evidence that reward learning is underpinned by two distinct decision control systems – a cognitive ‘model-based’ and a habitbased ‘model-free’ system, a comparable distinction for punishment avoidance has been much less clear. Methods: We implemented a pain avoidance task that placed differential emphasis on putative model-based and model-free processing, mirroring a paradigm and modelling approach recently developed for reward-based decision-making. Subjects per
The traveling salesmen problem (TSP)-one of the most fundamental NP-hard problems in combinatorial optimization-has received considerable attention owing to its direct applicability to real-world routing. Recent studies on TSP have adopted a deep policy network to learn a stochastic acceptance rule. Despite its success in some cases, the structural and functional complexity of the deep policy networks makes it hard to explore the problem space while performing a local search at the same time. We
The external globus pallidus (GPe) is a central part of the basal ganglia indirect pathway implicated in movement and decision-making. As a hub connecting the dorsal striatum and subthalamic nucleus (STN), the GPe guides repetitive and routine behaviors. However, it remains unknown how diverse GPe cells engage in routine formation while learning action sequences in repetitive reward-seeking conditioning. Here, in male mice, we investigated the Ca 2+ dynamics of two GPe cell types, astrocytes and
These invited talks discuss the following: Interactive Design Support System Using Kansei Information; Dynamic Fuzzy Q-learning with Forgetting Facility; Brain-inspired Artificial Intelligence: Model-based and Model-free Control; (Multivariate) Empirical Mode Decomposition Filter Banks and a Quintet Singular Value Decomposition; Visual Analysis and Representations of Type-2 Fuzzy Membership Functions.
MASSiVE (Multi – Layer Architecture for Semi-Autonomous Service Robots with Verified Task Execution) is a software framework that provides an infrastructure concept for distributed sensor and actuator systems such as service robots, operating in environments that are equipped with smart components. Besides this modular and extensible architecture, a principle of task knowledge specification and verification with processstructures is included in MASSiVE that is able to guarantee task planning in
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