Search Results for author: Zachary E. Ross

Found 12 papers, 6 papers with code

Universal Functional Regression with Neural Operator Flows

no code implementations3 Apr 2024 Yaozhong Shi, Angela F. Gao, Zachary E. Ross, Kamyar Azizzadenesheli

We empirically study the performance of OpFlow on regression and generation tasks with data generated from Gaussian processes with known posterior forms and non-Gaussian processes, as well as real-world earthquake seismograms with an unknown closed-form distribution.

Gaussian Processes regression +1

Broadband Ground Motion Synthesis via Generative Adversarial Neural Operators: Development and Validation

1 code implementation7 Sep 2023 Yaozhong Shi, Grigorios Lavrentiadis, Domniki Asimaki, Zachary E. Ross, Kamyar Azizzadenesheli

Lastly, cGM-GANO produces similar median scaling to traditional GMMs for frequencies greater than 1Hz for both PSA and EAS but underestimates the aleatory variability of EAS.

Motion Synthesis

Generative Adversarial Neural Operators

2 code implementations6 May 2022 Md Ashiqur Rahman, Manuel A. Florez, Anima Anandkumar, Zachary E. Ross, Kamyar Azizzadenesheli

The inputs to the generator are samples of functions from a user-specified probability measure, e. g., Gaussian random field (GRF), and the generator outputs are synthetic data functions.

Hyperparameter Optimization

U-NO: U-shaped Neural Operators

1 code implementation23 Apr 2022 Md Ashiqur Rahman, Zachary E. Ross, Kamyar Azizzadenesheli

We show that U-NO results in an average of 26% and 44% prediction improvement on Darcy's flow and turbulent Navier-Stokes equations, respectively, over the state of the art.

Operator learning

Seismic wave propagation and inversion with Neural Operators

no code implementations11 Aug 2021 Yan Yang, Angela F. Gao, Jorge C. Castellanos, Zachary E. Ross, Kamyar Azizzadenesheli, Robert W. Clayton

We develop a scheme to train Neural Operators on an ensemble of simulations performed with random velocity models and source locations.

Computational Efficiency

Deep Learning-based Damage Mapping with InSAR Coherence Time Series

1 code implementation24 May 2021 Oliver L. Stephenson, Tobias Köhne, Eric Zhan, Brent E. Cahill, Sang-Ho Yun, Zachary E. Ross, Mark Simons

In this study, we propose a novel approach to damage mapping, combining deep learning with the full time history of SAR observations of an impacted region in order to detect anomalous variations in the Earth's surface properties due to a natural disaster.

Time Series Time Series Analysis

Data-driven Accelerogram Synthesis using Deep Generative Models

no code implementations18 Nov 2020 Manuel A. Florez, Michaelangelo Caporale, Pakpoom Buabthong, Zachary E. Ross, Domniki Asimaki, Men-Andrin Meier

Our approach extends the Wasserstein GAN formulation to allow for the generation of ground-motions conditioned on a set of continuous physical variables.

EikoNet: Solving the Eikonal equation with Deep Neural Networks

1 code implementation25 Mar 2020 Jonathan D. Smith, Kamyar Azizzadenesheli, Zachary E. Ross

Here, we propose EikoNet, a deep learning approach to solving the Eikonal equation, which characterizes the first-arrival-time field in heterogeneous 3D velocity structures.

Directivity Modes of Earthquake Populations with Unsupervised Learning

no code implementations30 Jun 2019 Zachary E. Ross, Daniel T. Trugman, Kamyar Azizzadenesheli, Anima Anandkumar

A seismic spectral decomposition technique is used to first produce relative measurements of radiated energy for earthquakes in a spatially-compact cluster.

PhaseLink: A Deep Learning Approach to Seismic Phase Association

no code implementations8 Sep 2018 Zachary E. Ross, Yisong Yue, Men-Andrin Meier, Egill Hauksson, Thomas H. Heaton

For the examined datasets, PhaseLink can precisely associate P- and S-picks to events that are separated by ~12 seconds in origin time.

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