A Joint Planning and Learning Framework for Human-Aided Decision-Making
  Conventional reinforcement learning (RL) allows an agent to learn policies
via environmental rewards only, with a long and slow learning curve, especially
at the beginning stage. On the contrary, human learning is usually much faster
because prior and general knowledge and multiple information resources are
utilized. In this paper, we propose a
\textbf{P}lanner-\textbf{A}ctor-\textbf{C}ritic architecture for
hu\textbf{MAN}-centered planning and learning (\textbf{PACMAN}), where an agent
uses prior, high-level, deterministic symbolic knowledge to plan for
goal-directed actions. PACMAN integrates Actor-Critic algorithm of RL to
fine-tune its behavior towards both environmental rewards and human feedback.
To the best our knowledge, This is the first unified framework where
knowledge-based planning, RL, and human teaching jointly contribute to the
policy learning of an agent. Our experiments demonstrate that PACMAN leads to a
significant jump-start at the early stage of learning, converges rapidly and
with small variance, and is robust to inconsistent, infrequent, and misleading
feedback.
