Search Results for author: Calvin Tsay

Found 16 papers, 7 papers with code

Bayesian optimization as a flexible and efficient design framework for sustainable process systems

no code implementations29 Jan 2024 Joel A. Paulson, Calvin Tsay

Bayesian optimization (BO) is a powerful technology for optimizing noisy expensive-to-evaluate black-box functions, with a broad range of real-world applications in science, engineering, economics, manufacturing, and beyond.

Bayesian Optimization

Mixed-Integer Optimisation of Graph Neural Networks for Computer-Aided Molecular Design

no code implementations2 Dec 2023 Tom McDonald, Calvin Tsay, Artur M. Schweidtmann, Neil Yorke-Smith

ReLU neural networks have been modelled as constraints in mixed integer linear programming (MILP), enabling surrogate-based optimisation in various domains and efficient solution of machine learning certification problems.

Practical Path-based Bayesian Optimization

no code implementations1 Dec 2023 Jose Pablo Folch, James Odgers, Shiqiang Zhang, Robert M Lee, Behrang Shafei, David Walz, Calvin Tsay, Mark van der Wilk, Ruth Misener

There has been a surge in interest in data-driven experimental design with applications to chemical engineering and drug manufacturing.

Bayesian Optimization Experimental Design

When Deep Learning Meets Polyhedral Theory: A Survey

no code implementations29 Apr 2023 Joey Huchette, Gonzalo Muñoz, Thiago Serra, Calvin Tsay

In the past decade, deep learning became the prevalent methodology for predictive modeling thanks to the remarkable accuracy of deep neural networks in tasks such as computer vision and natural language processing.

Model-based feature selection for neural networks: A mixed-integer programming approach

no code implementations20 Feb 2023 Shudian Zhao, Calvin Tsay, Jan Kronqvist

In this work, we develop a novel input feature selection framework for ReLU-based deep neural networks (DNNs), which builds upon a mixed-integer optimization approach.

Classification feature selection +1

Tree ensemble kernels for Bayesian optimization with known constraints over mixed-feature spaces

1 code implementation2 Jul 2022 Alexander Thebelt, Calvin Tsay, Robert M. Lee, Nathan Sudermann-Merx, David Walz, Behrang Shafei, Ruth Misener

Tree ensembles can be well-suited for black-box optimization tasks such as algorithm tuning and neural architecture search, as they achieve good predictive performance with little or no manual tuning, naturally handle discrete feature spaces, and are relatively insensitive to outliers in the training data.

Bayesian Optimization Neural Architecture Search

P-split formulations: A class of intermediate formulations between big-M and convex hull for disjunctive constraints

no code implementations10 Feb 2022 Jan Kronqvist, Ruth Misener, Calvin Tsay

We develop a class of mixed-integer formulations for disjunctive constraints intermediate to the big-M and convex hull formulations in terms of relaxation strength.

OMLT: Optimization & Machine Learning Toolkit

1 code implementation4 Feb 2022 Francesco Ceccon, Jordan Jalving, Joshua Haddad, Alexander Thebelt, Calvin Tsay, Carl D. Laird, Ruth Misener

The optimization and machine learning toolkit (OMLT) is an open-source software package incorporating neural network and gradient-boosted tree surrogate models, which have been trained using machine learning, into larger optimization problems.

Bayesian Optimisation BIG-bench Machine Learning +1

Maximizing information from chemical engineering data sets: Applications to machine learning

no code implementations25 Jan 2022 Alexander Thebelt, Johannes Wiebe, Jan Kronqvist, Calvin Tsay, Ruth Misener

For each of these four data characteristics, we discuss applications where these data characteristics arise and show how current chemical engineering research is extending the fields of data science and machine learning to incorporate these challenges.

BIG-bench Machine Learning

Multi-Objective Constrained Optimization for Energy Applications via Tree Ensembles

1 code implementation4 Nov 2021 Alexander Thebelt, Calvin Tsay, Robert M. Lee, Nathan Sudermann-Merx, David Walz, Tom Tranter, Ruth Misener

Energy systems optimization problems are complex due to strongly non-linear system behavior and multiple competing objectives, e. g. economic gain vs. environmental impact.

Between steps: Intermediate relaxations between big-M and convex hull formulations

no code implementations29 Jan 2021 Jan Kronqvist, Ruth Misener, Calvin Tsay

This work develops a class of relaxations in between the big-M and convex hull formulations of disjunctions, drawing advantages from both.

Clustering

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