Search Results for author: Shawn C. Shadden

Found 5 papers, 5 papers with code

Noise Estimation in Gaussian Process Regression

1 code implementation20 Jun 2022 Siavash Ameli, Shawn C. Shadden

We develop a computational procedure to estimate the covariance hyperparameters for semiparametric Gaussian process regression models with additive noise.

Noise Estimation regression

Whole Heart Mesh Generation For Image-Based Computational Simulations By Learning Free-From Deformations

1 code implementation22 Jul 2021 Fanwei Kong, Shawn C. Shadden

Image-based computer simulation of cardiac function can be used to probe the mechanisms of (patho)physiology, and guide diagnosis and personalized treatment of cardiac diseases.

A Deep-Learning Approach For Direct Whole-Heart Mesh Reconstruction

1 code implementation16 Feb 2021 Fanwei Kong, Nathan Wilson, Shawn C. Shadden

Furthermore, by deforming a template mesh, our method can generate whole heart geometries with better anatomical consistency and produce high-resolution geometries from lower resolution input image data.

Segmentation Surface Reconstruction

Interpolating Log-Determinant and Trace of the Powers of Matrix $\mathbf{A} + t \mathbf{B}$

3 code implementations15 Sep 2020 Siavash Ameli, Shawn C. Shadden

We develop heuristic interpolation methods for the functions $t \mapsto \log \det \left( \mathbf{A} + t \mathbf{B} \right)$ and $t \mapsto \operatorname{trace}\left( (\mathbf{A} + t \mathbf{B})^{p} \right)$ where the matrices $\mathbf{A}$ and $\mathbf{B}$ are Hermitian and positive (semi) definite and $p$ and $t$ are real variables.

regression

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