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 Learning Graphical Models







Forecasting Treatment Responses Over Time Using Recurrent Marginal Structural Networks

Neural Information Processing Systems

Electronic health records provide a rich source of data for machine learning methods to learn dynamic treatment responses over time.





A Lyapunov-based Approach to Safe Reinforcement Learning

Neural Information Processing Systems

In many real-world reinforcement learning (RL) problems, besides optimizing the main objective function, an agent must concurrently avoid violating a number of constraints. In particular, besides optimizing performance, it is crucial to guarantee the safety of an agent during training as well as deployment (e.g., a robot should avoid taking actions - exploratory or not - which irrevocably harm its hardware). To incorporate safety in RL, we derive algorithms under the framework of constrained Markov decision processes (CMDPs), an extension of the standard Markov decision processes (MDPs) augmented with constraints on expected cumulative costs.