collaborators

8 papers

cs.LG2026

On the Implicit Flatness Bias of Sharpness-Aware Minimization: A Linear Stability Analysis with Quantitative Hyperparameter Bounds

Jiaxin Deng, Junbiao Pang

Sharpness-Aware Minimization (SAM) improves generalization by seeking parameters whose loss is robust to local adversarial perturbations, but the quantitative mechanism underlying…

cs.LG2026

From Perturbation Correction to Geometry-Aware Sampling: Sharpness-Guided Equilibrium Sampling for Balanced Flat Minima in Long-Tailed Learning

Jiaxin Deng, Junbiao Pang

Long-tailed learning couples two sources of poor generalization: head classes dominate training exposure, while under-represented classes often converge to sharper regions of the l…

cs.LG2026

Gradient-Energy Guided Block-Wise Perturbations for Sharpness-Aware Minimization

Zhen Huang, Jiaxin Deng, Junbiao Pang

Sharpness-Aware Minimization (SAM) improves generalization by minimizing the worst-case loss in a local parameter neighborhood. Standard SAM implicitly allocates its global perturb…

cs.CL2025

Efficiently Seeking Flat Minima for Better Generalization in Fine-Tuning Large Language Models and Beyond

Jiaxin Deng, Qingcheng Zhu, Junbiao Pang +3

Little research explores the correlation between the expressive ability and generalization ability of the low-rank adaptation (LoRA). Sharpness-Aware Minimization (SAM) improves mo…

cs.LG2025

Importance-aware Topic Modeling for Discovering Public Transit Risk from Noisy Social Media

Fatima Ashraf, Muhammad Ayub Sabir, Jiaxin Deng +2

Urban transit agencies increasingly turn to social media to monitor emerging service risks such as crowding, delays, and safety incidents, yet the signals of concern are sparse, sh…

cs.LG2025

Rectify and Align GPS Points to Parking Spots via Rank-1 Constraint

Jiaxing Deng, Junbiao Pang, Zhicheng Wang +1

Parking spots are essential components, providing vital mobile resources for residents in a city. Accurate Global Positioning System (GPS) points of parking spots are the core data…