Search Results for author: Vamsi K. Potluru

Found 19 papers, 3 papers with code

Six Levels of Privacy: A Framework for Financial Synthetic Data

no code implementations20 Mar 2024 Tucker Balch, Vamsi K. Potluru, Deepak Paramanand, Manuela Veloso

In addition to the benefits it provides, such as improved financial modeling and better testing procedures, it poses privacy risks as well.

Synthetic Data Generation

Fair Coresets via Optimal Transport

no code implementations9 Nov 2023 Zikai Xiong, Niccolò Dalmasso, Shubham Sharma, Freddy Lecue, Daniele Magazzeni, Vamsi K. Potluru, Tucker Balch, Manuela Veloso

In this work, we present fair Wasserstein coresets (FWC), a novel coreset approach which generates fair synthetic representative samples along with sample-level weights to be used in downstream learning tasks.

Clustering Decision Making +1

FairWASP: Fast and Optimal Fair Wasserstein Pre-processing

no code implementations31 Oct 2023 Zikai Xiong, Niccolò Dalmasso, Alan Mishler, Vamsi K. Potluru, Tucker Balch, Manuela Veloso

FairWASP can therefore be used to construct datasets which can be fed into any classification method, not just methods which accept sample weights.

Fairness

On the Inherent Privacy Properties of Discrete Denoising Diffusion Models

no code implementations24 Oct 2023 Rongzhe Wei, Eleonora Kreačić, Haoyu Wang, Haoteng Yin, Eli Chien, Vamsi K. Potluru, Pan Li

Focusing on per-instance differential privacy (pDP), our framework elucidates the potential privacy leakage for each data point in a given training dataset, offering insights into data preprocessing to reduce privacy risks of the synthetic dataset generation via DDMs.

Denoising Privacy Preserving

GraphMaker: Can Diffusion Models Generate Large Attributed Graphs?

1 code implementation20 Oct 2023 Mufei Li, Eleonora Kreačić, Vamsi K. Potluru, Pan Li

However, these models face challenges in generating large attributed graphs due to the complex attribute-structure correlations and the large size of these graphs.

Attribute Graph Generation

A supervised generative optimization approach for tabular data

no code implementations10 Sep 2023 Fadi Hamad, Shinpei Nakamura-Sakai, Saheed Obitayo, Vamsi K. Potluru

Synthetic data generation has emerged as a crucial topic for financial institutions, driven by multiple factors, such as privacy protection and data augmentation.

Data Augmentation Meta-Learning +1

Differentially Private Synthetic Data Using KD-Trees

no code implementations19 Jun 2023 Eleonora Kreačić, Navid Nouri, Vamsi K. Potluru, Tucker Balch, Manuela Veloso

Creation of a synthetic dataset that faithfully represents the data distribution and simultaneously preserves privacy is a major research challenge.

Synthetic Data Generation

Fast Learning of Multidimensional Hawkes Processes via Frank-Wolfe

no code implementations12 Dec 2022 Renbo Zhao, Niccolò Dalmasso, Mohsen Ghassemi, Vamsi K. Potluru, Tucker Balch, Manuela Veloso

Hawkes processes have recently risen to the forefront of tools when it comes to modeling and generating sequential events data.

Epidemiology

Online Learning for Mixture of Multivariate Hawkes Processes

no code implementations16 Aug 2022 Mohsen Ghassemi, Niccolò Dalmasso, Simran Lamba, Vamsi K. Potluru, Sameena Shah, Tucker Balch, Manuela Veloso

Online learning of Hawkes processes has received increasing attention in the last couple of years especially for modeling a network of actors.

Differentially Private Learning of Hawkes Processes

no code implementations27 Jul 2022 Mohsen Ghassemi, Eleonora Kreačić, Niccolò Dalmasso, Vamsi K. Potluru, Tucker Balch, Manuela Veloso

Hawkes processes have recently gained increasing attention from the machine learning community for their versatility in modeling event sequence data.

Bandit Sampling for Multiplex Networks

no code implementations8 Feb 2022 Cenk Baykal, Vamsi K. Potluru, Sameena Shah, Manuela M. Veloso

Most of the existing work focuses primarily on the monoplex setting where we have access to a network with only a single type of connection between entities.

Link Prediction Node Classification

Graph Belief Propagation Networks

1 code implementation6 Jun 2021 Junteng Jia, Cenk Baykal, Vamsi K. Potluru, Austin R. Benson

With the wide-spread availability of complex relational data, semi-supervised node classification in graphs has become a central machine learning problem.

Classification Node Classification

Goal recognition via model-based and model-free techniques

no code implementations3 Nov 2020 Daniel Borrajo, Sriram Gopalakrishnan, Vamsi K. Potluru

In this paper, we adapt state-of-the-art learning techniques to goal recognition, and compare model-based and model-free approaches in different domains.

Heuristics for Link Prediction in Multiplex Networks

no code implementations9 Apr 2020 Robert E. Tillman, Vamsi K. Potluru, Jiahao Chen, Prashant Reddy, Manuela Veloso

Through experiments with simulated and real world scientific collaboration, transportation and global trade networks, we demonstrate that the proposed heuristics show increased performance with the richness of connection type correlation structure and significantly outperform their baseline heuristics for ordinary networks with a single connection type.

Link Prediction Vocal Bursts Type Prediction

Explicit Group Sparse Projection with Applications to Deep Learning and NMF

no code implementations9 Dec 2019 Riyasat Ohib, Nicolas Gillis, Niccolò Dalmasso, Sameena Shah, Vamsi K. Potluru, Sergey Plis

Instead, in our approach we set the sparsity level for the whole set explicitly and simultaneously project a group of vectors with the sparsity level of each vector tuned automatically.

Network Pruning

Conservative Exploration using Interleaving

no code implementations3 Jun 2018 Sumeet Katariya, Branislav Kveton, Zheng Wen, Vamsi K. Potluru

In many practical problems, a learning agent may want to learn the best action in hindsight without ever taking a bad action, which is significantly worse than the default production action.

Block Coordinate Descent for Sparse NMF

1 code implementation15 Jan 2013 Vamsi K. Potluru, Sergey M. Plis, Jonathan Le Roux, Barak A. Pearlmutter, Vince D. Calhoun, Thomas P. Hayes

However, present algorithms designed for optimizing the mixed norm L$_1$/L$_2$ are slow and other formulations for sparse NMF have been proposed such as those based on L$_1$ and L$_0$ norms.

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