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Parham Moradi

Parham Moradi

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId: 654
Faculty: Faculty of Engineering
Address: Department of Computer Engineering, Faculty of Engineering, University of Kurdistan
Phone:

Research

Title
Automatic Skill Acquisition in Reinforcement Learning Agents Using Connection Bridge Centrality
Type
Presentation
Keywords
Reinforcement Learning, Hierarchical Reinforcement Learning,Option, Skill, Graph Centrality Measures, Connection Bridge Centrality
Year
2010
Researchers Negin Entezari ، Mohammad Ebrahim Shiri ، Parham Moradi

Abstract

Incorporating skills in reinforcement learning methods results in ac-celerate agents learning performance. The key problem of automatic skill discovery is to find subgoal states and create skills to reach them. Among the proposed algorithms, those based on graph centrality measures have achieved precise results. In this paper we propose a new graph centrality measure for identifying subgoal states that is crucial to develop useful skills. The main ad-vantage of the proposed centrality measure is that this measure considers both local and global information of the agent states to score them that result in iden-tifying real subgoal states. We will show through simulations for three bench-mark tasks, namely, “four-room grid world”, “taxi driver grid world” and “soccer simulation grid world” that a procedure based on the proposed centrality measure performs better than the procedure based on the other centrality measures.