• Corpus ID: 2488516

Towards a Biologically Plausible Backprop

@article{Scellier2016TowardsAB,
  title={Towards a Biologically Plausible Backprop},
  author={Benjamin Scellier and Yoshua Bengio},
  journal={ArXiv},
  year={2016},
  volume={abs/1602.05179}
}
This work contributes several new elements to the quest for a biologically plausible implementation of backprop in brains. We introduce a very general and abstract framework for machine learning, in which the quantities of interest are defined implicitly through an energy function. In this framework, only one kind of neural computation is involved both for the first phase (when the prediction is made) and the second phase (after the target is revealed), like the contrastive Hebbian learning… 

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References

SHOWING 1-10 OF 35 REFERENCES

Feedforward Initialization for Fast Inference of Deep Generative Networks is biologically plausible

This work finds conditions under which a simple feedforward computation is a very good initialization for inference, after the input units are clamped to observed values.

Towards Biologically Plausible Deep Learning

The theory about the probabilistic interpretation of auto-encoders is extended to justify improved sampling schemes based on the generative interpretation of denoising auto- Encoder, and these ideas are validated on generative learning tasks.

Free-energy and the brain

It is suggested that these perceptual processes are just one emergent property of systems that conform to a free-energy principle, and that the system’s state and structure encode an implicit and probabilistic model of the environment.

Biologically Plausible Error-Driven Learning Using Local Activation Differences: The Generalized Recirculation Algorithm

All known fully general error-driven learning algorithms that use local activation-based variables in deterministic networks can be considered variations of the GeneRec algorithm (and indirectly, of the backpropagation algorithm).

Equivalence of Backpropagation and Contrastive Hebbian Learning in a Layered Network

A special case in which they are identical: a multilayer perceptron with linear output units, to which weak feedback connections have been added suggests that the functionality of backpropagation can be realized alternatively by a Hebbian-type learning algorithm, which is suitable for implementation in biological networks.

Random feedback weights support learning in deep neural networks

A surprisingly simple algorithm is presented, which assigns blame by multiplying error signals by random synaptic weights, and it is shown that a network can learn to extract useful information from signals sent through these random feedback connections, in essence, the network learns to learn.

Contrastive Hebbian Learning in the Continuous Hopfield Model

Towards deep learning with spiking neurons in energy based models with contrastive Hebbian plasticity

Preliminary results indicate that it is possible to learn a non-linear regression task with hidden layers, spiking neurons and a local synaptic plasticity rule.

A neuronal learning rule for sub-millisecond temporal coding

A modelling study based on computer simulations of a neuron in the laminar nucleus of the barn owl shows that the necessary degree of coherence in the signal arrival times can be attained during ontogenetic development by virtue of an unsupervised hebbian learning rule.

Early Inference in Energy-Based Models Approximates Back-Propagation

We show that Langevin MCMC inference in an energy-based model with latent variables has the property that the early steps of inference, starting from a stationary point, correspond to propagating