Search Results for author: Alex Tank

Found 5 papers, 2 papers with code

Neural Granger Causality

3 code implementations16 Feb 2018 Alex Tank, Ian Covert, Nicholas Foti, Ali Shojaie, Emily Fox

We show that our neural Granger causality methods outperform state-of-the-art nonlinear Granger causality methods on the DREAM3 challenge data.

Time Series Analysis

An Interpretable and Sparse Neural Network Model for Nonlinear Granger Causality Discovery

1 code implementation22 Nov 2017 Alex Tank, Ian Cover, Nicholas J. Foti, Ali Shojaie, Emily B. Fox

A sufficient condition for Granger non-causality in this setting is that all of the outgoing weights of the input data, the past lags of a series, to the first hidden layer are zero.

Time Series Time Series Analysis

An Efficient ADMM Algorithm for Structural Break Detection in Multivariate Time Series

no code implementations22 Nov 2017 Alex Tank, Emily B. Fox, Ali Shojaie

We present an efficient alternating direction method of multipliers (ADMM) algorithm for segmenting a multivariate non-stationary time series with structural breaks into stationary regions.

Time Series Time Series Analysis

A Unified Framework for Long Range and Cold Start Forecasting of Seasonal Profiles in Time Series

no code implementations23 Oct 2017 Christopher Xie, Alex Tank, Alec Greaves-Tunnell, Emily Fox

Providing long-range forecasts is a fundamental challenge in time series modeling, which is only compounded by the challenge of having to form such forecasts when a time series has never previously been observed.

Recommendation Systems Time Series +1

Streaming Variational Inference for Bayesian Nonparametric Mixture Models

no code implementations1 Dec 2014 Alex Tank, Nicholas J. Foti, Emily B. Fox

In theory, Bayesian nonparametric (BNP) models are well suited to streaming data scenarios due to their ability to adapt model complexity with the observed data.

Clustering Variational Inference

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