Search Results for author: Bradley J. Nelson

Found 7 papers, 2 papers with code

Balancing a 3D Inverted Pendulum using Remote Magnetic Manipulation

no code implementations8 Feb 2024 Jasan Zughaibi, Bradley J. Nelson, Michael Muehlebach

This greatly expands the range of potential medical applications and includes even dynamic environments as encountered in cardiovascular interventions.

What is an equivariant neural network?

no code implementations15 May 2022 Lek-Heng Lim, Bradley J. Nelson

We explain equivariant neural networks, a notion underlying breakthroughs in machine learning from deep convolutional neural networks for computer vision to AlphaFold 2 for protein structure prediction, without assuming knowledge of equivariance or neural networks.

Protein Structure Prediction

Topology-Preserving Dimensionality Reduction via Interleaving Optimization

1 code implementation31 Jan 2022 Bradley J. Nelson, Yuan Luo

Dimensionality reduction techniques are powerful tools for data preprocessing and visualization which typically come with few guarantees concerning the topological correctness of an embedding.

Data Visualization Dimensionality Reduction

Topological Regularization for Dense Prediction

no code implementations22 Nov 2021 Deqing Fu, Bradley J. Nelson

Dense prediction tasks such as depth perception and semantic segmentation are important applications in computer vision that have a concrete topological description in terms of partitioning an image into connected components or estimating a function with a small number of local extrema corresponding to objects in the image.

Semantic Segmentation

Clustering of Electromagnetic Showers and Particle Interactions with Graph Neural Networks in Liquid Argon Time Projection Chambers Data

no code implementations2 Jul 2020 Francois Drielsma, Qing Lin, Pierre Côte de Soux, Laura Dominé, Ran Itay, Dae Heun Koh, Bradley J. Nelson, Kazuhiro Terao, Ka Vang Tsang, Tracy L. Usher

The optimized algorithm is then applied to the related task of clustering particle instances into interactions and yields a mean ARI of 99. 2 % for an interaction density of $\sim\mathcal{O}(1)\, m^{-3}$.

Clustering

Modeling Electromagnetic Navigation Systems for Medical Applications using Random Forests and Artificial Neural Networks

no code implementations26 Sep 2019 Ruoxi Yu, Samuel L. Charreyron, Quentin Boehler, Cameron Weibel, Carmen C. Y. Poon, Bradley J. Nelson

In this paper, we use a random forest (RF) and an artificial neural network (ANN) to model the nonlinear behavior of the magnetic fields generated by an eMNS.

BIG-bench Machine Learning

A Topology Layer for Machine Learning

3 code implementations29 May 2019 Rickard Brüel-Gabrielsson, Bradley J. Nelson, Anjan Dwaraknath, Primoz Skraba, Leonidas J. Guibas, Gunnar Carlsson

Topology applied to real world data using persistent homology has started to find applications within machine learning, including deep learning.

BIG-bench Machine Learning

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