Search Results for author: James Chapman

Found 8 papers, 5 papers with code

Spectroscopy-Guided Discovery of Three-Dimensional Structures of Disordered Materials with Diffusion Models

1 code implementation9 Dec 2023 Hyuna Kwon, Tim Hsu, Wenyu Sun, Wonseok Jeong, Fikret Aydin, James Chapman, Xiao Chen, Matthew R. Carbone, Deyu Lu, Fei Zhou, Tuan Anh Pham

In this work, we introduce a new framework based on the diffusion model, a recent generative machine learning method to predict 3D structures of disordered materials from a target property.

Stratified-NMF for Heterogeneous Data

no code implementations17 Nov 2023 James Chapman, Yotam Yaniv, Deanna Needell

Non-negative matrix factorization (NMF) is an important technique for obtaining low dimensional representations of datasets.

Novel Batch Active Learning Approach and Its Application to Synthetic Aperture Radar Datasets

1 code implementation19 Jul 2023 James Chapman, Bohan Chen, Zheng Tan, Jeff Calder, Kevin Miller, Andrea L. Bertozzi

Active learning improves the performance of machine learning methods by judiciously selecting a limited number of unlabeled data points to query for labels, with the aim of maximally improving the underlying classifier's performance.

Active Learning Graph Learning +1

Multi-modal Variational Autoencoders for normative modelling across multiple imaging modalities

no code implementations16 Mar 2023 Ana Lawry Aguila, James Chapman, Andre Altmann

We aim to develop a multi-modal normative modelling framework where abnormality is aggregated across variables of multiple modalities and is better able to detect deviations than uni-modal baselines.

Score-based denoising for atomic structure identification

1 code implementation5 Dec 2022 Tim Hsu, Babak Sadigh, Nicolas Bertin, Cheol Woo Park, James Chapman, Vasily Bulatov, Fei Zhou

We propose an effective method for removing thermal vibrations that complicate the task of analyzing complex dynamics in atomistic simulation of condensed matter.

Denoising Template Matching

A Generalized EigenGame with Extensions to Multiview Representation Learning

1 code implementation21 Nov 2022 James Chapman, Ana Lawry Aguila, Lennie Wells

We demonstrate the effectiveness of our method for solving GEPs in the stochastic setting using canonical multiview datasets and demonstrate state-of-the-art performance for optimizing Deep CCA.

Dimensionality Reduction Representation Learning

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