no code implementations • 3 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.
1 code implementation • 7 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.
2 code implementations • 6 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.
1 code implementation • 23 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.
no code implementations • 11 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.
1 code implementation • 24 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.
1 code implementation • 9 Jan 2021 • Jonathan D. Smith, Zachary E. Ross, Kamyar Azizzadenesheli, Jack B. Muir
We introduce a scheme for probabilistic hypocenter inversion with Stein variational inference.
no code implementations • 18 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.
1 code implementation • 25 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.
no code implementations • 5 Feb 2020 • Xiaotian Zhang, Zhe Jia, Zachary E. Ross, Robert W. Clayton
We present a machine-learning approach to classifying the phases of surface wave dispersion curves.
no code implementations • 30 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.
no code implementations • 8 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.