Yuhan Wu

OneSketch: A Generic and Accurate Sketch for Data Streams

2023 · IEEE Transactions on Knowledge and Data Engineering

In this paper, we propose a generic sketch algorithm capable of achieving more accuracy in the following five tasks: finding top-$k$frequent items, finding heavy hitters, per-item frequency estimation, and heavy changes in the time and …

Taking a Big Step: Large Learning Rates in Denoising Score Matching Prevent Memorization

2025 · arXiv (Cornell University)

Denoising score matching plays a pivotal role in the performance of diffusion-based generative models. However, the empirical optimal score--the exact solution to the denoising score matching--leads to memorization, where generated samples replicate the training data. …