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James Duncan

2 accepted papers

2020

AdaBelief Optimizer: Adapting Stepsizes by the Belief in Observed Gradients

NeurIPS 2020spotlight

Most popular optimizers for deep learning can be broadly categorized as adaptive methods (e.g.~Adam) and accelerated schemes (e.g.~stochastic gradient descent (SGD) with momentum). For many models such as convolutional neural networks (CNNs), adaptive methods typically converge faster but generalize…

2020

Adaptive Checkpoint Adjoint Method for Gradient Estimation in Neural ODE

ICML 2020poster

The empirical performance of neural ordinary differential equations (NODEs) is significantly inferior to discrete-layer models on benchmark tasks (e.g. image classification). We demonstrate an explanation is the inaccuracy of existing gradient estimation methods: the adjoint method has numerical err…