Search Results for author: Kim Christensen

Found 7 papers, 2 papers with code

Composite likelihood estimation of stationary Gaussian processes with a view toward stochastic volatility

no code implementations19 Mar 2024 Mikkel Bennedsen, Kim Christensen, Peter Christensen

We develop a framework for composite likelihood inference of parametric continuous-time stationary Gaussian processes.

Gaussian Processes

Characterisation of Anti-Arrhythmic Drug Effects on Cardiac Electrophysiology using Physics-Informed Neural Networks

1 code implementation13 Mar 2024 Ching-En Chiu, Arieh Levy Pinto, Rasheda A Chowdhury, Kim Christensen, Marta Varela

The ability to accurately infer cardiac electrophysiological (EP) properties is key to improving arrhythmia diagnosis and treatment.

High-dimensional estimation of quadratic variation based on penalized realized variance

no code implementations4 Mar 2021 Kim Christensen, Mikkel Slot Nielsen, Mark Podolskij

We show that under a nuclear norm penalization, the PRV is computed by soft-thresholding the eigenvalues of realized variance (RV).

Vocal Bursts Intensity Prediction

A GMM approach to estimate the roughness of stochastic volatility

no code implementations9 Oct 2020 Anine E. Bolko, Kim Christensen, Mikko S. Pakkanen, Bezirgen Veliyev

We show that a parameter estimator based on the integrated variance is consistent and, under stronger conditions, asymptotically normally distributed.

Unified Mechanism of Atrial Fibrillation in a Simple Model

1 code implementation29 Oct 2018 Max Falkenberg, Andrew J. Ford, Anthony C. Li, Alberto Ciacci, Nicholas S. Peters, Kim Christensen

The mechanism of atrial fibrillation (AF) is poorly understood, resulting in disappointing success rates of ablative treatment.

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