BAM: Bayes with Adaptive MemoryDownload PDF

29 Sept 2021, 00:32 (edited 26 Feb 2022)ICLR 2022 PosterReaders: Everyone
  • Keywords: Bayesian learning, online learning
  • Abstract: Online learning via Bayes' theorem allows new data to be continuously integrated into an agent's current beliefs. However, a naive application of Bayesian methods in non-stationary environments leads to slow adaptation and results in state estimates that may converge confidently to the wrong parameter value. A common solution when learning in changing environments is to discard/downweight past data; however, this simple mechanism of "forgetting" fails to account for the fact that many real-world environments involve revisiting similar states. We propose a new framework, Bayes with Adaptive Memory (BAM), that takes advantage of past experience by allowing the agent to choose which past observations to remember and which to forget. We demonstrate that BAM generalizes many popular Bayesian update rules for non-stationary environments. Through a variety of experiments, we demonstrate the ability of BAM to continuously adapt in an ever-changing world.
  • One-sentence Summary: We augment Bayes with memory to generalize many frameworks and overcome limitations of traditional methods in non-stationary settings
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