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Cesar F. Caiafa

5 accepted papers

2026

Two Modalities Are Better Than One: Efficient Adversarial Purification via Multimodal Diffusion Models

ICML 2026poster

Adversarial purification uses generative models to restore clean data distributions from unseen attacks without retraining classifiers. However, unimodal diffusion-based approaches struggle to preserve semantic consistency, while recent multimodal variants rely on computationally expensive adversari…

Cited by 0SourceScholar
2024

Diffusion Models Demand Contrastive Guidance for Adversarial Purification to Advance

ICML 2024poster

In adversarial defense, adversarial purification can be viewed as a special generation task with the purpose to remove adversarial attacks and diffusion models excel in adversarial purification for their strong generative power. With different predetermined generation requirements, various types of…

Cited by 6SourcePDFScholar
2023

Alternating Local Enumeration (TnALE): Solving Tensor Network Structure Search with Fewer Evaluations

ICML 2023poster

Tensor network (TN) is a powerful framework in machine learning, but selecting a good TN model, known as TN structure search (TN-SS), is a challenging and computationally intensive task. The recent approach TNLS (Li et al., 2022) showed promising results for this task. However, its computational eff…

2019

Learning Macroscopic Brain Connectomes via Group-Sparse Factorization

NeurIPS 2019poster

Mapping structural brain connectomes for living human brains typically requires expert analysis and rule-based models on diffusion-weighted magnetic resonance imaging. A data-driven approach, however, could overcome limitations in such rule-based approaches and improve precision mappings for individ…

2017

Unified representation of tractography and diffusion-weighted MRI data using sparse multidimensional arrays

NeurIPS 2017poster

Recently, linear formulations and convex optimization methods have been proposed to predict diffusion-weighted Magnetic Resonance Imaging (dMRI) data given estimates of brain connections generated using tractography algorithms. The size of the linear models comprising such methods grows with both dM…

Cited by 13SourcePDFScholar