Search Results for author: B. Milan Horacek

Found 6 papers, 3 papers with code

Fast Posterior Estimation of Cardiac Electrophysiological Model Parameters via Bayesian Active Learning

no code implementations13 Oct 2021 Md Shakil Zaman, Jwala Dhamala, Pradeep Bajracharya, John L. Sapp, B. Milan Horacek, Katherine C. Wu, Natalia A. Trayanova, Linwei Wang

In this paper, we present a Bayesian active learning method to directly approximate the posterior pdf function of cardiac model parameters, in which we intelligently select training points to query the simulation model in order to learn the posterior pdf using a small number of samples.

Active Learning

Improving Disentangled Representation Learning with the Beta Bernoulli Process

1 code implementation3 Sep 2019 Prashnna Kumar Gyawali, Zhiyuan Li, Cameron Knight, Sandesh Ghimire, B. Milan Horacek, John Sapp, Linwei Wang

We note that the independence within and the complexity of the latent density are two different properties we constrain when regularizing the posterior density: while the former promotes the disentangling ability of VAE, the latter -- if overly limited -- creates an unnecessary competition with the data reconstruction objective in VAE.

Decision Making Representation Learning

Bayesian Optimization on Large Graphs via a Graph Convolutional Generative Model: Application in Cardiac Model Personalization

1 code implementation1 Jul 2019 Jwala Dhamala, Sandesh Ghimire, John L. Sapp, B. Milan Horacek, Linwei Wang

In this paper, we present a novel graph convolutional VAE to allow generative modeling of non-Euclidean data, and utilize it to embed Bayesian optimization of large graphs into a small latent space.

Bayesian Optimization

Generative Modeling and Inverse Imaging of Cardiac Transmembrane Potential

no code implementations12 May 2019 Sandesh Ghimire, Jwala Dhamala, Prashnna Kumar Gyawali, John L. Sapp, B. Milan Horacek, Linwei Wang

We introduce a novel model-constrained inference framework that replaces conventional physiological models with a deep generative model trained to generate TMP sequences from low-dimensional generative factors.

Deep Generative Model with Beta Bernoulli Process for Modeling and Learning Confounding Factors

no code implementations31 Oct 2018 Prashnna K Gyawali, Cameron Knight, Sandesh Ghimire, B. Milan Horacek, John L. Sapp, Linwei Wang

While deep representation learning has become increasingly capable of separating task-relevant representations from other confounding factors in the data, two significant challenges remain.

Representation Learning

Learning disentangled representation from 12-lead electrograms: application in localizing the origin of Ventricular Tachycardia

1 code implementation4 Aug 2018 Prashnna K Gyawali, B. Milan Horacek, John L. Sapp, Linwei Wang

In this work, we present a conditional variational autoencoder (VAE) to extract the subject-specific adjustment to the ECG data, conditioned on task-specific representations learned from a deterministic encoder.

Cannot find the paper you are looking for? You can Submit a new open access paper.