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  • Title: Qualitative Measurements of Policy Discrepancy for Return-Based Deep Q-Network.
    Author: Meng W, Zheng Q, Yang L, Li P, Pan G.
    Journal: IEEE Trans Neural Netw Learn Syst; 2020 Oct; 31(10):4374-4380. PubMed ID: 31765320.
    Abstract:
    The deep Q-network (DQN) and return-based reinforcement learning are two promising algorithms proposed in recent years. The DQN brings advances to complex sequential decision problems, while return-based algorithms have advantages in making use of sample trajectories. In this brief, we propose a general framework to combine the DQN and most of the return-based reinforcement learning algorithms, named R-DQN. We show that the performance of the traditional DQN can be significantly improved by introducing return-based algorithms. In order to further improve the R-DQN, we design a strategy with two measurements to qualitatively measure the policy discrepancy. We conduct experiments on several representative tasks from the OpenAI Gym and Atari games. The state-of-the-art performance achieved by our method with this proposed strategy validates its effectiveness.
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