Search Results for author: Chandrika Kamath

Found 6 papers, 0 papers with code

Spatio-Temporal Surrogates for Interaction of a Jet with High Explosives: Part II -- Clustering Extremely High-Dimensional Grid-Based Data

no code implementations3 Jul 2023 Chandrika Kamath, Juliette S. Franzman

We show how we can use the randomness of both the random projections, and the choice of initial centroids in k-means clustering, to determine the number of clusters in our data set.

Clustering

Spatio-Temporal Surrogates for Interaction of a Jet with High Explosives: Part I -- Analysis with a Small Sample Size

no code implementations3 Jul 2023 Chandrika Kamath, Juliette S. Franzman, Brian H. Daub

The characteristics of our data set are unique - the vector-valued outputs from each simulation are available at over two million spatial locations; each simulation is run for a relatively small number of time steps; the size of the computational domain varies with each simulation; and resource constraints limit the number of simulations we can run.

Data Mining for Faster, Interpretable Solutions to Inverse Problems: A Case Study Using Additive Manufacturing

no code implementations7 Jun 2023 Chandrika Kamath, Juliette Franzman, Ravi Ponmalai

Solving inverse problems, where we find the input values that result in desired values of outputs, can be challenging.

Intelligent sampling for surrogate modeling, hyperparameter optimization, and data analysis

no code implementations6 Jun 2023 Chandrika Kamath

Sampling techniques are used in many fields, including design of experiments, image processing, and graphics.

Hyperparameter Optimization

Classification of Orbits in Poincaré Maps using Machine Learning

no code implementations18 May 2023 Chandrika Kamath

Poincar\'e plots, also called Poincar\'e maps, are used by plasma physicists to understand the behavior of magnetically confined plasma in numerical simulations of a tokamak.

Classification

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