Search Results for author: Ramin Bostanabad

Found 12 papers, 3 papers with code

Parametric Encoding with Attention and Convolution Mitigate Spectral Bias of Neural Partial Differential Equation Solvers

no code implementations22 Mar 2024 Mehdi Shishehbor, Shirin Hosseinmardi, Ramin Bostanabad

Deep neural networks (DNNs) are increasingly used to solve partial differential equations (PDEs) that naturally arise while modeling a wide range of systems and physical phenomena.

Decoder

Neural Networks with Kernel-Weighted Corrective Residuals for Solving Partial Differential Equations

no code implementations7 Jan 2024 Carlos Mora, Amin Yousefpour, Shirin Hosseinmardi, Ramin Bostanabad

Physics-informed machine learning (PIML) has emerged as a promising alternative to conventional numerical methods for solving partial differential equations (PDEs).

Physics-informed machine learning

GP+: A Python Library for Kernel-based learning via Gaussian Processes

1 code implementation12 Dec 2023 Amin Yousefpour, Zahra Zanjani Foumani, Mehdi Shishehbor, Carlos Mora, Ramin Bostanabad

In this paper we introduce GP+, an open-source library for kernel-based learning via Gaussian processes (GPs) which are powerful statistical models that are completely characterized by their parametric covariance and mean functions.

Bayesian Optimization Gaussian Processes

Multi-fidelity Design of Porous Microstructures for Thermofluidic Applications

no code implementations27 Oct 2023 Jonathan Tammer Eweis-Labolle, Chuanning Zhao, Yoonjin Won, Ramin Bostanabad

We address these challenges by developing a data-driven framework for designing optimal porous microstructures for cooling applications.

Management

On the Effects of Heterogeneous Errors on Multi-fidelity Bayesian Optimization

no code implementations6 Sep 2023 Zahra Zanjani Foumani, Amin Yousefpour, Mehdi Shishehbor, Ramin Bostanabad

In this paper, we dispense with these incorrect assumptions by proposing an MF emulation method that (1) learns a noise model for each data source, and (2) enables MFBO to leverage highly biased LF sources which are only locally correlated with the HF source.

Bayesian Optimization

Breaking Boundaries: Distributed Domain Decomposition with Scalable Physics-Informed Neural PDE Solvers

no code implementations28 Aug 2023 Arthur Feeney, Zitong Li, Ramin Bostanabad, Aparna Chandramowlishwaran

Mosaic Flow is a novel domain decomposition method designed to scale physics-informed neural PDE solvers to large domains.

Unsupervised Anomaly Detection via Nonlinear Manifold Learning

no code implementations15 Jun 2023 Amin Yousefpour, Mehdi Shishehbor, Zahra Zanjani Foumani, Ramin Bostanabad

Anomalies are samples that significantly deviate from the rest of the data and their detection plays a major role in building machine learning models that can be reliably used in applications such as data-driven design and novelty detection.

Novelty Detection Unsupervised Anomaly Detection

Probabilistic Neural Data Fusion for Learning from an Arbitrary Number of Multi-fidelity Data Sets

1 code implementation30 Jan 2023 Carlos Mora, Jonathan Tammer Eweis-Labolle, Tyler Johnson, Likith Gadde, Ramin Bostanabad

Our NN architecture inversely learns non-trivial (e. g., non-additive and non-hierarchical) biases of the LF sources in an interpretable and visualizable manifold where each data source is encoded via a low-dimensional distribution.

Multi-Fidelity Cost-Aware Bayesian Optimization

1 code implementation4 Nov 2022 Zahra Zanjani Foumani, Mehdi Shishehbor, Amin Yousefpour, Ramin Bostanabad

Bayesian optimization (BO) is increasingly employed in critical applications such as materials design and drug discovery.

Bayesian Optimization Drug Discovery

Data Fusion with Latent Map Gaussian Processes

no code implementations4 Dec 2021 Nicholas Oune, Jonathan Tammer Eweis-Labolle, Ramin Bostanabad

Multi-fidelity modeling and calibration are data fusion tasks that ubiquitously arise in engineering design.

Gaussian Processes

Mosaic Flows: A Transferable Deep Learning Framework for Solving PDEs on Unseen Domains

no code implementations22 Apr 2021 Hengjie Wang, Robert Planas, Aparna Chandramowlishwaran, Ramin Bostanabad

Then, we proposed mosaic flow(MF) predictor, a novel iterative algorithm that assembles the GFNet's inferences for BVPs on large domains with unseen sizes/shapes and BCs while preserving the spatial regularity of the solution.

Latent Map Gaussian Processes for Mixed Variable Metamodeling

no code implementations7 Feb 2021 Nicholas Oune, Ramin Bostanabad

In this paper, we introduce latent map Gaussian processes (LMGPs) that inherit the attractive properties of GPs and are also applicable to mixed data which have both quantitative and qualitative inputs.

Bayesian Optimization Gaussian Processes +1

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