Search Results for author: Snigdhansu Chatterjee

Found 9 papers, 3 papers with code

Uncertainty Quantification in Inverse Models in Hydrology

no code implementations3 Oct 2023 Somya Sharma Chatterjee, Rahul Ghosh, Arvind Renganathan, Xiang Li, Snigdhansu Chatterjee, John Nieber, Christopher Duffy, Vipin Kumar

Our inverse model offers 3\% improvement in R$^2$ for the inverse model (basin characteristic estimation) and 6\% for the forward model (streamflow prediction).

Uncertainty Quantification

Probabilistic Inverse Modeling: An Application in Hydrology

no code implementations12 Oct 2022 Somya Sharma, Rahul Ghosh, Arvind Renganathan, Xiang Li, Snigdhansu Chatterjee, John Nieber, Christopher Duffy, Vipin Kumar

We propose uncertainty based learning method that offers 6\% improvement in $R^2$ for streamflow prediction (forward modeling) from inverse model inferred basin characteristic estimates, 17\% reduction in uncertainty (40\% in presence of noise) and 4\% higher coverage rate for basin characteristics.

Feature Selection using e-values

1 code implementation11 Jun 2022 Subhabrata Majumdar, Snigdhansu Chatterjee

In the context of supervised parametric models, we introduce the concept of e-values.

feature selection

Approximate Bayesian Computation for Physical Inverse Modeling

no code implementations26 Nov 2021 Neel Chatterjee, Somya Sharma, Sarah Swisher, Snigdhansu Chatterjee

Using these TFT models to draw inference involves estimating parameters used to fit to the experimental data.

Generalized Multivariate Signs for Nonparametric Hypothesis Testing in High Dimensions

no code implementations2 Jul 2021 Subhabrata Majumdar, Snigdhansu Chatterjee

High-dimensional data, where the dimension of the feature space is much larger than sample size, arise in a number of statistical applications.

Two-sample testing Vocal Bursts Intensity Prediction

A Fast-Optimal Guaranteed Algorithm For Learning Sub-Interval Relationships in Time Series

no code implementations3 Jun 2019 Saurabh Agrawal, Saurabh Verma, Anuj Karpatne, Stefan Liess, Snigdhansu Chatterjee, Vipin Kumar

Traditional approaches focus on finding relationships between two entire time series, however, many interesting relationships exist in small sub-intervals of time and remain feeble during other sub-intervals.

Time Series Time Series Analysis

On Weighted Multivariate Sign Functions

1 code implementation7 May 2019 Subhabrata Majumdar, Snigdhansu Chatterjee

Multivariate sign functions are often used for robust estimation and inference.

Methodology

Mining Novel Multivariate Relationships in Time Series Data Using Correlation Networks

1 code implementation6 Oct 2018 Saurabh Agrawal, Michael Steinbach, Daniel Boley, Snigdhansu Chatterjee, Gowtham Atluri, Anh The Dang, Stefan Liess, Vipin Kumar

In many domains, there is significant interest in capturing novel relationships between time series that represent activities recorded at different nodes of a highly complex system.

Time Series Time Series Analysis

Mining Sub-Interval Relationships In Time Series Data

no code implementations16 Feb 2018 Saurabh Agrawal, Saurabh Verma, Gowtham Atluri, Anuj Karpatne, Stefan Liess, Angus Macdonald III, Snigdhansu Chatterjee, Vipin Kumar

In this paper, we define the notion of a sub-interval relationship (SIR) to capture inter- actions between two time series that are prominent only in certain sub-intervals of time.

Computational Efficiency Time Series +1

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