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Oscar A. Ramirez

4 accepted papers

2024

Target Networks and Over-parameterization Stabilize Off-policy Bootstrapping with Function Approximation

ICML 2024spotlight

We prove that the combination of a target network and over-parameterized linear function approximation establishes a weaker convergence condition for bootstrapped value estimation in certain cases, even with off-policy data. Our condition is naturally satisfied for expected updates over the entire s…

2022

Understanding and Leveraging Overparameterization in Recursive Value Estimation

ICLR 2022poster

The theory of function approximation in reinforcement learning (RL) typically considers low capacity representations that incur a tradeoff between approximation error, stability and generalization. Current deep architectures, however, operate in an overparameterized regime where approximation error…

Cited by 18SourcePDFScholar
2016

ViTa: Visual task specification interface for manipulation with uncalibrated visual servoing

ICRA 2016

We present a human robot interface (HRI) for semi-autonomous human-in-the-loop control, that aims to tackle some of the challenges for robotics in unstructured environments. Our HRI lets the user specify desired object alignments in an image editor as geometric overlays on images. The HRI is based o

Cited by 18SourceScholar