Zobrazeno 1 - 10
of 695
pro vyhledávání: '"Marsden, A. L."'
The triboelectric charging of granular materials remains a poorly understood phenomenon with a wide range of scientific and industrial applications, from volcanic lightning to pharmaceutical manufacturing. The Faraday cup is the most commonly used ap
Externí odkaz:
http://arxiv.org/abs/2411.09505
Autor:
Menon, Karthik, Zanoni, Andrea, Khan, Owais, Geraci, Gianluca, Nieman, Koen, Schiavazzi, Daniele E., Marsden, Alison L.
Simulations of coronary hemodynamics have improved non-invasive clinical risk stratification and treatment outcomes for coronary artery disease, compared to relying on anatomical imaging alone. However, simulations typically use empirical approaches
Externí odkaz:
http://arxiv.org/abs/2409.02247
Autor:
Salvador, Matteo, Marsden, Alison L.
Scientific Machine Learning (ML) is gaining momentum as a cost-effective alternative to physics-based numerical solvers in many engineering applications. In fact, scientific ML is currently being used to build accurate and efficient surrogate models
Externí odkaz:
http://arxiv.org/abs/2408.09818
Autor:
Zanoni, Andrea, Geraci, Gianluca, Salvador, Matteo, Marsden, Alison L., Schiavazzi, Daniele E.
We present a new approach for nonlinear dimensionality reduction, specifically designed for computationally expensive mathematical models. We leverage autoencoders to discover a one-dimensional neural active manifold (NeurAM) capturing the model outp
Externí odkaz:
http://arxiv.org/abs/2408.03534
Autor:
Richter, Jakob, Nitzler, Jonas, Pegolotti, Luca, Menon, Karthik, Biehler, Jonas, Wall, Wolfgang A., Schiavazzi, Daniele E., Marsden, Alison L., Pfaller, Martin R.
Boundary condition (BC) calibration to assimilate clinical measurements is an essential step in any subject-specific simulation of cardiovascular fluid dynamics. Bayesian calibration approaches have successfully quantified the uncertainties inherent
Externí odkaz:
http://arxiv.org/abs/2404.14187
Autor:
Pfaller, Martin R., Latorre, Marcos, Schwarz, Erica L., Gerosa, Fannie M., Szafron, Jason M., Humphrey, Jay D., Marsden, Alison L.
Equilibrated fluid-solid-growth (FSGe) is a fast, open source, three-dimensional (3D) computational platform for simulating interactions between instantaneous hemodynamics and long-term vessel wall adaptation through mechanobiologically equilibrated
Externí odkaz:
http://arxiv.org/abs/2404.13523
Reduced-order models (ROMs) allow for the simulation of blood flow in patient-specific vasculatures without the high computational cost and wait time associated with traditional computational fluid dynamics (CFD) models. Unfortunately, due to the sim
Externí odkaz:
http://arxiv.org/abs/2402.15651
Autor:
Zanoni, Andrea, Geraci, Gianluca, Salvador, Matteo, Menon, Karthik, Marsden, Alison L., Schiavazzi, Daniele E.
We study the problem of multifidelity uncertainty propagation for computationally expensive models. In particular, we consider the general setting where the high-fidelity and low-fidelity models have a dissimilar parameterization both in terms of num
Externí odkaz:
http://arxiv.org/abs/2312.12361
Autor:
Lee, John D., Richter, Jakob, Pfaller, Martin R., Szafron, Jason M., Menon, Karthik, Zanoni, Andrea, Ma, Michael R., Feinstein, Jeffrey A., Kreutzer, Jacqueline, Marsden, Alison L., Schiavazzi, Daniele E.
The substantial computational cost of high-fidelity models in numerical hemodynamics has, so far, relegated their use mainly to offline treatment planning. New breakthroughs in data-driven architectures and optimization techniques for fast surrogate
Externí odkaz:
http://arxiv.org/abs/2312.00854
Autor:
Brown, Aaron L., Salvador, Matteo, Shi, Lei, Pfaller, Martin R., Hu, Zinan, Harold, Kaitlin E., Hsiai, Tzung, Vedula, Vijay, Marsden, Alison L.
In numerical simulations of cardiac mechanics, coupling the heart to a model of the circulatory system is essential for capturing physiological cardiac behavior. A popular and efficient technique is to use an electrical circuit analogy, known as a lu
Externí odkaz:
http://arxiv.org/abs/2310.13780