Search Results for author: Raghu Pasupathy

Found 4 papers, 0 papers with code

Overlapping Batch Confidence Intervals on Statistical Functionals Constructed from Time Series: Application to Quantiles, Optimization, and Estimation

no code implementations17 Jul 2023 Ziwei Su, Raghu Pasupathy, Yingchieh Yeh, Peter W. Glynn

The message from extensive numerical experimentation is that in settings where a functional CLT on the point estimator is in effect, using \emph{large overlapping batches} alongside OB-x critical values yields confidence intervals that are often of significantly higher quality than those obtained from more generic methods like subsampling or the bootstrap.

Time Series

A Retrospective Approximation Approach for Smooth Stochastic Optimization

no code implementations7 Mar 2021 David Newton, Raghu Bollapragada, Raghu Pasupathy, Nung Kwan Yip

Our investigation leads naturally to generalizing SG into Retrospective Approximation (RA) where, during each iteration, a "deterministic solver" executes possibly multiple steps on a subsampled deterministic problem and stops when further solving is deemed unnecessary from the standpoint of statistical efficiency.

Image Classification Stochastic Optimization

Adaptive Sequential SAA for Solving Two-stage Stochastic Linear Programs

no code implementations7 Dec 2020 Raghu Pasupathy, Yongjia Song

We present adaptive sequential SAA (sample average approximation) algorithms to solve large-scale two-stage stochastic linear programs.

Vocal Bursts Valence Prediction

Efficient Estimation in the Tails of Gaussian Copulas

no code implementations5 Jul 2016 Kalyani Nagaraj, Jie Xu, Raghu Pasupathy, Soumyadip Ghosh

The first of our proposed estimators $\estOpt$ is the "full-information" estimator that actively exploits such local structure to achieve bounded relative error in Gaussian settings.

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