Search Results for author: Mohsen Ghassemi

Found 9 papers, 1 papers with code

Auditing and Enforcing Conditional Fairness via Optimal Transport

no code implementations17 Oct 2024 Mohsen Ghassemi, Alan Mishler, Niccolo Dalmasso, Luhao Zhang, Vamsi K. Potluru, Tucker Balch, Manuela Veloso

Many algorithmic fairness techniques exist to target demographic parity, but CDP is much harder to achieve, particularly when the conditioning variable has many levels and/or when the model outputs are continuous.

Fairness

Distributionally and Adversarially Robust Logistic Regression via Intersecting Wasserstein Balls

no code implementations18 Jul 2024 Aras Selvi, Eleonora Kreacic, Mohsen Ghassemi, Vamsi Potluru, Tucker Balch, Manuela Veloso

To mitigate this issue, several successful approaches have been proposed, including replacing the empirical distribution in training with: (i) a worst-case distribution within an ambiguity set, leading to a distributionally robust (DR) counterpart of ARO; or (ii) a mixture of the empirical distribution with one derived from an auxiliary dataset (e. g., synthetic, external, or out-of-domain).

regression

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.

Learning Mixtures of Separable Dictionaries for Tensor Data: Analysis and Algorithms

1 code implementation22 Mar 2019 Mohsen Ghassemi, Zahra Shakeri, Anand D. Sarwate, Waheed U. Bajwa

This work addresses the problem of learning sparse representations of tensor data using structured dictionary learning.

Dictionary Learning

STARK: Structured Dictionary Learning Through Rank-one Tensor Recovery

no code implementations13 Nov 2017 Mohsen Ghassemi, Zahra Shakeri, Anand D. Sarwate, Waheed U. Bajwa

In recent years, a class of dictionaries have been proposed for multidimensional (tensor) data representation that exploit the structure of tensor data by imposing a Kronecker structure on the dictionary underlying the data.

Dictionary Learning

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