Search Results for author: James V. Burke

Found 6 papers, 1 papers with code

Fast Robust Methods for Singular State-Space Models

no code implementations7 Mar 2018 Jonathan Jonker, Aleksandr Y. Aravkin, James V. Burke, Gianluigi Pillonetto, Sarah Webster

We therefore suggest that the proposed approach be the {\it default choice} for estimating state space models outside of the Gaussian context, regardless of whether the error covariances are singular or not.

Time Series Time Series Analysis

Convex Geometry of the Generalized Matrix-Fractional Function

no code implementations4 Mar 2017 James V. Burke, Yuan Gao, Tim Hoheisel

Generalized matrix-fractional (GMF) functions are a class of matrix support functions introduced by Burke and Hoheisel as a tool for unifying a range of seemingly divergent matrix optimization problems associated with inverse problems, regularization and learning.

Generalized system identification with stable spline kernels

1 code implementation30 Sep 2013 Aleksandr Y. Aravkin, James V. Burke, Gianluigi Pillonetto

This paper extends linear system identification to a wide class of nonsmooth stable spline estimators, where regularization functionals and data misfits can be selected from a rich set of piecewise linear-quadratic (PLQ) penalties.

The connection between Bayesian estimation of a Gaussian random field and RKHS

no code implementations22 Jan 2013 Aleksandr Y. Aravkin, Bradley M. Bell, James V. Burke, Gianluigi Pillonetto

Reconstruction of a function from noisy data is often formulated as a regularized optimization problem over an infinite-dimensional reproducing kernel Hilbert space (RKHS).

Sparse/Robust Estimation and Kalman Smoothing with Nonsmooth Log-Concave Densities: Modeling, Computation, and Theory

no code implementations19 Jan 2013 Aleksandr Y. Aravkin, James V. Burke, Gianluigi Pillonetto

We introduce a class of quadratic support (QS) functions, many of which play a crucial role in a variety of applications, including machine learning, robust statistical inference, sparsity promotion, and Kalman smoothing.

Computational Efficiency Time Series Analysis

Smoothing Dynamic Systems with State-Dependent Covariance Matrices

no code implementations19 Nov 2012 Aleksandr Y. Aravkin, James V. Burke

One of the basic assumptions required to apply the Kalman smoothing framework is that error covariance matrices are known and given.

Computational Efficiency

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