An Algebraic Monolithic Method for Volume-coupled Multiphysics Problems
Abstract not provided.
Publications
Search results
Jump to search filtersContainers and the Truth between HPC & Cloud System Software Convergence
Abstract not provided.
Model-based characterization on 10 qubits
Abstract not provided.
Hierarchical Low-rank Solvers for Large Sparse Linear Systems
Abstract not provided.
Improving Large-Scale PDE-Constrained Optimization for Ice Sheet Initialization
Abstract not provided.
Take Me to the Clouds Above: Bridging On Site HPC with Clouds for Capacity Workloads
Abstract not provided.
The DPG Method for the Convection-Reaction Problem Revisited
We study both conforming and non-conforming versions of the practical DPG method for the convection-reaction problem. We determine that the most common approach for DPG stability analysis (construction of a local Fortin operator) is infeasible for the convection-reaction problem. We then develop a line of argument based on the direct construction of a global Fortin operator; we find that employing a polynomial enrichment for the test space does not suffice for this purpose, motivating the introduction of a (two-element) subgrid mesh. The argument combines mathematical analysis with numerical experiments
Risk-Adapted Design of Experiments for High-Consequence Applications
Abstract not provided.
Making physics-informed ML work
Abstract not provided.
Room Temperature Operation of Donor-Based Atomically Precise Devices
Abstract not provided.
Generalized Moving Least Squares (GMLS) with Clip and Assured Sum (CAAS) Post-processing for Earth System Remap
Abstract not provided.
A Physics-Informed Operator Regression Framework for Extracting Data-Driven Continuum Models
Abstract not provided.
Extending TRiSK with Higher-Order Hodge Stars and WENO/FCT Advection
Abstract not provided.
Surrogate Modeling of Spent Fuel Degradation for Repository Performance Assessment
Abstract not provided.
Signatures of missing donors in transport through atomically precise P donor chains in Si
Abstract not provided.
Parallel Solver Framework for Mixed-Integer PDE-Constrained Optimization
ROL-PEBBL is a C++, MPI-based parallel code for mixed-integer PDE-constrained optimization (MIPDECO). In these problems we wish to optimize (control, design, etc.) physical systems, which must obey the laws of physics, when some of the decision variables must take integer values. ROL-PEBBL combines a code to efficiently search over integer choices (PEBBL = Parallel Enumeration Branch-and-Bound Library) and a code for efficient nonlinear optimization, including PDE-constrained optimization (ROL = Rapid Optimization Library). In this report, we summarize the design of ROL-PEBBL and initial applications/results. For an artificial source-inversion problem, finding sources of pollution on a grid from sparse samples, ROL-PEBBLs solution for the nest grid gave the best optimization guarantee for any general solver that gives both a solution and a quality guarantee.
Optimal Control for the Fractional Laplacian
Abstract not provided.
Communication Using Imperfect Equipment
Abstract not provided.
Mixed-Precision Schemes for Linear Algebra Kernels on GPUs
Abstract not provided.
Graph Coarsening Techniques for GPUs and Manycore CPUs
Abstract not provided.
IMEX vs ETD integrators in a nonhydrostatic atmosphere model
Abstract not provided.
CIS External Review Lightning Presentation: Neuromorphic Graph Algorithms
Abstract not provided.
A Monolithic Algebraic Multigrid Approach for Coupled Multiphysics Problems using the MueLu Framework
Abstract not provided.
Epistemic Uncertainty: Computation and Usage
Abstract not provided.
Performance Portability for ECP Data Analytics
Abstract not provided.
Results 826–850 of 9,998