Search Results for author: Rui Ponte Costa

Found 12 papers, 4 papers with code

BP(λ): Online Learning via Synthetic Gradients

no code implementations13 Jan 2024 Joseph Pemberton, Rui Ponte Costa

Inspired by the accumulate $\mathrm{TD}(\lambda)$ in RL, we propose a fully online method for learning synthetic gradients which avoids the use of BPTT altogether: accumulate $BP(\lambda)$.

Reinforcement Learning (RL)

Single-phase deep learning in cortico-cortical networks

1 code implementation23 Jun 2022 Will Greedy, Heng Wei Zhu, Joseph Pemberton, Jack Mellor, Rui Ponte Costa

First, we demonstrate that our model can effectively backpropagate errors through multiple layers using a single-phase learning process.

Image Classification

Lost in Latent Space: Disentangled Models and the Challenge of Combinatorial Generalisation

no code implementations5 Apr 2022 Milton L. Montero, Jeffrey S. Bowers, Rui Ponte Costa, Casimir J. H. Ludwig, Gaurav Malhotra

Recent research has shown that generative models with highly disentangled representations fail to generalise to unseen combination of generative factor values.

Cortico-cerebellar networks as decoupling neural interfaces

1 code implementation NeurIPS 2021 Joseph Pemberton, Ellen Boven, Richard Apps, Rui Ponte Costa

Recently, decoupled neural interfaces (DNIs) were introduced as a solution to the forward and feedback locking problems in deep networks.

Caption Generation

Current State and Future Directions for Learning in Biological Recurrent Neural Networks: A Perspective Piece

no code implementations12 May 2021 Luke Y. Prince, Roy Henha Eyono, Ellen Boven, Arna Ghosh, Joe Pemberton, Franz Scherr, Claudia Clopath, Rui Ponte Costa, Wolfgang Maass, Blake A. Richards, Cristina Savin, Katharina Anna Wilmes

We provide a brief review of the common assumptions about biological learning with findings from experimental neuroscience and contrast them with the efficiency of gradient-based learning in recurrent neural networks.

The role of Disentanglement in Generalisation

1 code implementation ICLR 2021 Milton Llera Montero, Casimir JH Ludwig, Rui Ponte Costa, Gaurav Malhotra, Jeffrey Bowers

It is claimed that such representations should be able to capture the compositional structure of the world which can then be combined to produce novel representations.

Disentanglement Out-of-Distribution Generalization +1

Cortico-cerebellar networks as decoupled neural interfaces

no code implementations1 Jan 2021 Joseph Pemberton, Ellen Boven, Richard Apps, Rui Ponte Costa

Deep learning methods suffer from similar locking constraints both on the forward and backward phase.

Caption Generation

HIPPOCAMPAL NEURONAL REPRESENTATIONS IN CONTINUAL LEARNING

no code implementations25 Sep 2019 Samia Mohinta, Rui Ponte Costa, Stephane Ciocchi

The hippocampus has long been associated with spatial memory and goal-directed spatial navigation.

Continual Learning Hippocampus +2

Dendritic cortical microcircuits approximate the backpropagation algorithm

no code implementations NeurIPS 2018 João Sacramento, Rui Ponte Costa, Yoshua Bengio, Walter Senn

Deep learning has seen remarkable developments over the last years, many of them inspired by neuroscience.

Dendritic error backpropagation in deep cortical microcircuits

1 code implementation30 Dec 2017 João Sacramento, Rui Ponte Costa, Yoshua Bengio, Walter Senn

Animal behaviour depends on learning to associate sensory stimuli with the desired motor command.

Denoising

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