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Conference Paper
An Application of LSTM Recurrent Networks to Expanding of Search Tree Nodes in Symbolic Planning
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- Authors
- Joonmyun Cho, Young-Sung Son, Jun Hee Park, Chan-Won Park
- Issue Date
- 2020-10
- Citation
- International Conference on Information and Communication Technology Convergence (ICTC) 2020, pp.1293-1295
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- Applying deep learning to symbolic planning is not straightforward because they differently internalize knowledge. One represents knowledge numerically while the other does symbolically. Hybrid methods that take strengths from both techniques will deliver better performance on automated planning. This paper presents a method to improve the performance of symbolic planning by applying LSTM recurrent networks to inferring the guidance knowledge for search tree node expansion. The networks learn sequential patterns across previous node expansions and generalizes the learned knowledge to predict promising actions and their probability scores at the present expansion step. The prediction consists with node cost estimation for heuristic search. A simple experiment vindicates the method of this research.
- KSP Keywords
- Automated Planning, Heuristic search, Recurrent Network(RN), Sequential patterns, cost estimation, deep learning(DL), hybrid method, search tree