Search Results for author: Umais Zahid

Found 4 papers, 0 papers with code

When in Doubt, Think Slow: Iterative Reasoning with Latent Imagination

no code implementations23 Feb 2024 Martin Benfeghoul, Umais Zahid, Qinghai Guo, Zafeirios Fountas

In an unfamiliar setting, a model-based reinforcement learning agent can be limited by the accuracy of its world model.

Model-based Reinforcement Learning

Sample as You Infer: Predictive Coding With Langevin Dynamics

no code implementations22 Nov 2023 Umais Zahid, Qinghai Guo, Zafeirios Fountas

We present a novel algorithm for parameter learning in generic deep generative models that builds upon the predictive coding (PC) framework of computational neuroscience.

Predictive Coding as a Neuromorphic Alternative to Backpropagation: A Critical Evaluation

no code implementations5 Apr 2023 Umais Zahid, Qinghai Guo, Zafeirios Fountas

Backpropagation has rapidly become the workhorse credit assignment algorithm for modern deep learning methods.

Curvature-Sensitive Predictive Coding with Approximate Laplace Monte Carlo

no code implementations9 Mar 2023 Umais Zahid, Qinghai Guo, Karl Friston, Zafeirios Fountas

In part, this has been due to the poor performance of models trained with PC when evaluated by both sample quality and marginal likelihood.

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