Search Results for author: Shounak Datta

Found 13 papers, 5 papers with code

Identifying acute illness phenotypes via deep temporal interpolation and clustering network on physiologic signatures

no code implementations27 Jul 2023 Yuanfang Ren, Yanjun Li, Tyler J. Loftus, Jeremy Balch, Kenneth L. Abbott, Shounak Datta, Matthew M. Ruppert, Ziyuan Guan, Benjamin Shickel, Parisa Rashidi, Tezcan Ozrazgat-Baslanti, Azra Bihorac

With clustering analysis for vital signs within six hours of admission, patient phenotypes with distinct pathophysiological signatures and outcomes may support early clinical decisions.

Clustering

Interval Bound Interpolation for Few-shot Learning with Few Tasks

1 code implementation7 Apr 2022 Shounak Datta, Sankha Subhra Mullick, Anish Chakrabarty, Swagatam Das

We then use a novel strategy to artificially form new tasks for training by interpolating between the available tasks and their respective interval bounds.

Few-Shot Learning Metric Learning

Counterfactual Representation Learning with Balancing Weights

no code implementations23 Oct 2020 Serge Assaad, Shuxi Zeng, Chenyang Tao, Shounak Datta, Nikhil Mehta, Ricardo Henao, Fan Li, Lawrence Carin

A key to causal inference with observational data is achieving balance in predictive features associated with each treatment type.

Causal Inference counterfactual +1

Double Robust Representation Learning for Counterfactual Prediction

1 code implementation15 Oct 2020 Shuxi Zeng, Serge Assaad, Chenyang Tao, Shounak Datta, Lawrence Carin, Fan Li

Causal inference, or counterfactual prediction, is central to decision making in healthcare, policy and social sciences.

Causal Inference counterfactual +2

RetiNerveNet: Using Recursive Deep Learning to Estimate Pointwise 24-2 Visual Field Data based on Retinal Structure

no code implementations15 Oct 2020 Shounak Datta, Eduardo B. Mariottoni, David Dov, Alessandro A. Jammal, Lawrence Carin, Felipe A. Medeiros

Due to the SAP test's innate difficulty and its high test-retest variability, we propose the RetiNerveNet, a deep convolutional recursive neural network for obtaining estimates of the SAP visual field.

Appropriateness of Performance Indices for Imbalanced Data Classification: An Analysis

no code implementations26 Aug 2020 Sankha Subhra Mullick, Shounak Datta, Sourish Gunesh Dhekane, Swagatam Das

Indices quantifying the performance of classifiers under class-imbalance, often suffer from distortions depending on the constitution of the test set or the class-specific classification accuracy, creating difficulties in assessing the merit of the classifier.

Classification General Classification

Application of Deep Interpolation Network for Clustering of Physiologic Time Series

no code implementations27 Apr 2020 Yanjun Li, Yuanfang Ren, Tyler J. Loftus, Shounak Datta, M. Ruppert, Ziyuan Guan, Dapeng Wu, Parisa Rashidi, Tezcan Ozrazgat-Baslanti, Azra Bihorac

M Interpretation: In a heterogeneous cohort of hospitalized patients, a deep interpolation network extracted representations from vital sign data measured within six hours of hospital admission.

Clustering Time Series +1

Generative Adversarial Minority Oversampling

1 code implementation ICCV 2019 Sankha Subhra Mullick, Shounak Datta, Swagatam Das

We propose a three-player adversarial game between a convex generator, a multi-class classifier network, and a real/fake discriminator to perform oversampling in deep learning systems.

Fuzzy Clustering to Identify Clusters at Different Levels of Fuzziness: An Evolutionary Multi-Objective Optimization Approach

no code implementations9 Aug 2018 Avisek Gupta, Shounak Datta, Swagatam Das

This paper presents Entropy $c$-Means (ECM), a method of fuzzy clustering that simultaneously optimizes two contradictory objective functions, resulting in the creation of fuzzy clusters with different levels of fuzziness.

Clustering

Diversifying Support Vector Machines for Boosting using Kernel Perturbation: Applications to Class Imbalance and Small Disjuncts

1 code implementation22 Dec 2017 Shounak Datta, Sayak Nag, Sankha Subhra Mullick, Swagatam Das

The diversification (generating slightly varying separating discriminators) of Support Vector Machines (SVMs) for boosting has proven to be a challenge due to the strong learning nature of SVMs.

Decision Making

Boosting with Lexicographic Programming: Addressing Class Imbalance without Cost Tuning

1 code implementation31 Aug 2017 Shounak Datta, Sayak Nag, Swagatam Das

We then demonstrate how this insight can be used to attain a good compromise between the rare and abundant classes without having to resort to cost set tuning, which has long been the norm for imbalanced classification.

Classification General Classification +2

Clustering with Missing Features: A Penalized Dissimilarity Measure based approach

no code implementations22 Apr 2016 Shounak Datta, Supritam Bhattacharjee, Swagatam Das

Many real-world clustering problems are plagued by incomplete data characterized by missing or absent features for some or all of the data instances.

Clustering Imputation

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