Search Results for author: Aritra Guha

Found 9 papers, 4 papers with code

Interpolation for Robust Learning: Data Augmentation on Wasserstein Geodesics

no code implementations4 Feb 2023 Jiacheng Zhu, JieLin Qiu, Aritra Guha, Zhuolin Yang, XuanLong Nguyen, Bo Li, Ding Zhao

Our work provides a new perspective of model robustness through the lens of Wasserstein geodesic-based interpolation with a practical off-the-shelf strategy that can be combined with existing robust training methods.

Data Augmentation

Towards Algorithmic Fairness in Space-Time: Filling in Black Holes

no code implementations8 Nov 2022 Cheryl Flynn, Aritra Guha, Subhabrata Majumdar, Divesh Srivastava, Zhengyi Zhou

New technologies and the availability of geospatial data have drawn attention to spatio-temporal biases present in society.

Active Learning Fairness +1

Scalable nonparametric Bayesian learning for heterogeneous and dynamic velocity fields

no code implementations15 Feb 2021 Sunrit Chakraborty, Aritra Guha, Rayleigh Lei, XuanLong Nguyen

Analysis of heterogeneous patterns in complex spatio-temporal data finds usage across various domains in applied science and engineering, including training autonomous vehicles to navigate in complex traffic scenarios.

Autonomous Vehicles Navigate

Functional optimal transport: map estimation and domain adaptation for functional data

1 code implementation7 Feb 2021 Jiacheng Zhu, Aritra Guha, Dat Do, Mengdi Xu, XuanLong Nguyen, Ding Zhao

We introduce a formulation of optimal transport problem for distributions on function spaces, where the stochastic map between functional domains can be partially represented in terms of an (infinite-dimensional) Hilbert-Schmidt operator mapping a Hilbert space of functions to another.

Domain Adaptation Transfer Learning

Outlier Robust Optimal Transport

no code implementations1 Jan 2021 Debarghya Mukherjee, Aritra Guha, Justin Solomon, Yuekai Sun, Mikhail Yurochkin

In light of recent advances in solving the OT problem, OT distances are widely used as loss functions in minimum distance estimation.

Outlier Detection

Robust Unsupervised Learning of Temporal Dynamic Interactions

no code implementations18 Jun 2020 Aritra Guha, Rayleigh Lei, Jiacheng Zhu, XuanLong Nguyen, Ding Zhao

These distance metrics can serve as an objective for assessing the stability of an interaction learning algorithm.

Representation Learning

Dirichlet Simplex Nest and Geometric Inference

1 code implementation27 May 2019 Mikhail Yurochkin, Aritra Guha, Yuekai Sun, XuanLong Nguyen

We propose Dirichlet Simplex Nest, a class of probabilistic models suitable for a variety of data types, and develop fast and provably accurate inference algorithms by accounting for the model's convex geometry and low dimensional simplicial structure.

Scalable inference of topic evolution via models for latent geometric structures

1 code implementation NeurIPS 2019 Mikhail Yurochkin, Zhiwei Fan, Aritra Guha, Paraschos Koutris, XuanLong Nguyen

We develop new models and algorithms for learning the temporal dynamics of the topic polytopes and related geometric objects that arise in topic model based inference.

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