Search Results for author: Brett Ninness

Found 5 papers, 2 papers with code

Variational State and Parameter Estimation

no code implementations14 Dec 2020 Jarrad Courts, Johannes Hendriks, Adrian Wills, Thomas Schön, Brett Ninness

In this work, a variational approach is used to provide an assumed density which approximates the desired, intractable, distribution.

Variational System Identification for Nonlinear State-Space Models

no code implementations8 Dec 2020 Jarrad Courts, Adrian Wills, Thomas Schön, Brett Ninness

This paper considers parameter estimation for nonlinear state-space models, which is an important but challenging problem.

Variational Inference

Correlated pseudo-marginal Metropolis-Hastings using quasi-Newton proposals

1 code implementation26 Jun 2018 Johan Dahlin, Adrian Wills, Brett Ninness

Pseudo-marginal Metropolis-Hastings (pmMH) is a versatile algorithm for sampling from target distributions which are not easy to evaluate point-wise.

Constructing Metropolis-Hastings proposals using damped BFGS updates

1 code implementation4 Jan 2018 Johan Dahlin, Adrian Wills, Brett Ninness

The computation of Bayesian estimates of system parameters and functions of them on the basis of observed system performance data is a common problem within system identification.

Computation Computational Finance

A Bayesian Filtering Algorithm for Gaussian Mixture Models

no code implementations16 May 2017 Adrian G. Wills, Johannes Hendriks, Christopher Renton, Brett Ninness

A Bayesian filtering algorithm is developed for a class of state-space systems that can be modelled via Gaussian mixtures.

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