Search Results for author: James Morrill

Found 7 papers, 5 papers with code

New directions in the applications of rough path theory

no code implementations9 Feb 2023 Adeline Fermanian, Terry Lyons, James Morrill, Cristopher Salvi

This article provides a concise overview of some of the recent advances in the application of rough path theory to machine learning.

Neural Controlled Differential Equations for Online Prediction Tasks

2 code implementations21 Jun 2021 James Morrill, Patrick Kidger, Lingyi Yang, Terry Lyons

This is fine when the whole time series is observed in advance, but means that Neural CDEs are not suitable for use in \textit{online prediction tasks}, where predictions need to be made in real-time: a major use case for recurrent networks.

Irregular Time Series Time Series +1

Neural CDEs for Long Time Series via the Log-ODE Method

no code implementations28 Sep 2020 James Morrill, Patrick Kidger, Cristopher Salvi, James Foster, Terry Lyons

Neural Controlled Differential Equations (Neural CDEs) are the continuous-time analogue of an RNN, just as Neural ODEs are analogous to ResNets.

Time Series Time Series Analysis

Neural Rough Differential Equations for Long Time Series

3 code implementations17 Sep 2020 James Morrill, Cristopher Salvi, Patrick Kidger, James Foster, Terry Lyons

Neural controlled differential equations (CDEs) are the continuous-time analogue of recurrent neural networks, as Neural ODEs are to residual networks, and offer a memory-efficient continuous-time way to model functions of potentially irregular time series.

Irregular Time Series Time Series +2

Generalised Interpretable Shapelets for Irregular Time Series

2 code implementations28 May 2020 Patrick Kidger, James Morrill, Terry Lyons

The shapelet transform is a form of feature extraction for time series, in which a time series is described by its similarity to each of a collection of `shapelets'.

Audio Classification Irregular Time Series +2

Neural Controlled Differential Equations for Irregular Time Series

5 code implementations NeurIPS 2020 Patrick Kidger, James Morrill, James Foster, Terry Lyons

The resulting \emph{neural controlled differential equation} model is directly applicable to the general setting of partially-observed irregularly-sampled multivariate time series, and (unlike previous work on this problem) it may utilise memory-efficient adjoint-based backpropagation even across observations.

Irregular Time Series Time Series +1

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