AnomalousNet: A Hybrid Approach with Attention U-Nets and Change Point Detection for Accurate Characterization of Anomalous Diffusion in Video Data
Abstract: Anomalous diffusion occurs in various systems, including protein transport within cells, animal movement in complex habitats, pollutant dispersion in groundwater, and nanoparticle motion in synthetic materials. Accurately estimating the anomalous diffusion exponent and diffusion coefficient from particle trajectories provide deeper insights into the system’s underlying dynamics, facilitating the identification of particle behaviors and detecting changes in diffusion states. However, analyzing short and noisy video data, which often yield heterogeneous and incomplete trajectories, poses a significant challenge for traditional statistical approaches. To address these issues, we introduce a data-driven method that integrates particle tracking, an Attention U-Net architecture, and change-point detection. Our methodology demonstrated strong performance in the 2nd Anomalous Diffusion (AnDi) Challenge, ranking within the top two submissions for the single-trajectory tasks in the video-based track and among the top six for the ensemble task in the single-trajectory track.
Short bio: J. Alberto Conejero is full professor in the Department of Applied Mathematics of Universitat Politècnica de València (UPV) since 2020. He is also Vice-rector of Students and Entrepreneurship at UPV. Before, he has also been Deputy Secretary General and Director of the Academic Academic Performance and Curricular Assessment Area. He has published more than 100 articles in indexed journals on mathematics and its applications. In 2014 he received the Teaching Excellence Award from the Social Council of UPV, and in in 2021 was co-leader of the winning team of the Pandemic Response Challenge of the XPRIZE Foundation.
Presenter: J. Alberto Conejero (Universitat Politècnica de València, València)
Date: 2025-02-20 12:15 (CET)
Location: Oficinas ELLIS Alicante, Muelle Pte., 5 – Edificio A, Alicante 03001, Alicante ES
This talk is part of the 2nd Distinguishes Lectures Mini-Workshop.