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Mahdi Alikhasi

dblp:382/3605 · DBLP profile ↗
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1ranked-venue papers
1as first author
1since 2021 · last 2024
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 first-author · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Reinforcement learning · 100%

Topics — the 3 heaviest of 3, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Reinforcement learning
hierarchical reinforcement learning
0.812024
Unveiling Options with Neural Network Decomposition · ICLR 2024
Machine learning › Reinforcement learning › hierarchical reinforcement learning
option discovery
0.812024
Unveiling Options with Neural Network Decomposition · ICLR 2024
Machine learning › Reinforcement learning › hierarchical reinforcement learning
temporal abstraction
0.812024
Unveiling Options with Neural Network Decomposition · ICLR 2024

Methods — techniques the papers use, named apart from their topics

neural network decomposition · 0.8levin loss minimization · 0.8
YearPublicationVenuePosition
2024 Unveiling Options with Neural Network Decomposition
abstract
In reinforcement learning, agents often learn policies for specific tasks without the ability to generalize this knowledge to related tasks. This paper introduces an algorithm that attempts to address this limitation by decomposing neural networks encoding policies for Markov Decision Processes into reusable sub-policies, which are used to synthesize temporally extended actions, or options. We consider neural networks with piecewise linear activation functions, so that they can be mapped to an equivalent tree that is similar to oblique decision trees. Since each node in such a tree serves as a function of the input of the tree, each sub-tree is a sub-policy of the main policy. We turn each of these sub-policies into options by wrapping it with while-loops of varied number of iterations. Given the large number of options, we propose a selection mechanism based on minimizing the Levin loss for a uniform policy on these options. Empirical results in two grid-world domains where exploration can be difficult confirm that our method can identify useful options, thereby accelerating the learning process on similar but different tasks.
Mahdi Alikhasi, Levi Lelis
ICLR1