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Shima Alizadeh

4 accepted papers

2024

Pessimistic Off-Policy Multi-Objective Optimization

AISTATS 2024poster

Multi-objective optimization is a class of optimization problems with multiple conflicting objectives. We study offline optimization of multi-objective policies from data collected by a previously deployed policy. We propose a pessimistic estimator for policy values that can be easily plugged into e…

Cited by 0SourcePDFScholar
2024

Using Uncertainty Quantification to Characterize and Improve Out-of-Domain Learning for PDEs

ICML 2024poster

Existing work in scientific machine learning (SciML) has shown that data-driven learning of solution operators can provide a fast approximate alternative to classical numerical partial differential equation (PDE) solvers. Of these, Neural Operators (NOs) have emerged as particularly promising. We ob…

2023

Guiding continuous operator learning through Physics-based boundary constraints

ICLR 2023poster

Boundary conditions (BCs) are important groups of physics-enforced constraints that are necessary for solutions of Partial Differential Equations (PDEs) to satisfy at specific spatial locations. These constraints carry important physical meaning, and guarantee the existence and the uniqueness of the…

2023

Learning Physical Models that Can Respect Conservation Laws

ICML 2023poster

Recent work in scientific machine learning (SciML) has focused on incorporating partial differential equation (PDE) information into the learning process. Much of this work has focused on relatively "easy'' PDE operators (e.g., elliptic and parabolic), with less emphasis on relatively ``hard'' PDE o…