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Yanlei Zhang

6 accepted papers

2025

AdaFisher: Adaptive Second Order Optimization via Fisher Information

ICLR 2025poster

First-order optimization methods are currently the mainstream in training deep neural networks (DNNs). Optimizers like Adam incorporate limited curvature information by employing the diagonal matrix preconditioning of the stochastic gradient during the training. Despite their widespread, second-orde…

2025

Geometry-Aware Generative Autoencoders for Warped Riemannian Metric Learning and Generative Modeling on Data Manifolds

AISTATS 2025poster

Rapid growth of high-dimensional datasets in fields such as single-cell RNA sequencing and spatial genomics has led to unprecedented opportunities for scientific discovery, but it also presents unique computational and statistical challenges. Traditional methods struggle with geometry-aware data gen…

Cited by 0SourceScholar
2025

Principal Curvatures Estimation with Applications to Single Cell Data

ICASSP 2025accepted

The rapidly growing field of single-cell transcriptomic sequencing (scRNAseq) presents challenges for data analysis due to its massive datasets. A common method in manifold learning consists in hypothesizing that datasets lie on a lower dimensional manifold. This allows to study the geometry of poin…

Cited by 0SourceScholar
2024

Simulation-Free Schrödinger Bridges via Score and Flow Matching

AISTATS 2024poster

We present simulation-free score and flow matching ([SF]$^2$M), a simulation-free objective for inferring stochastic dynamics given unpaired samples drawn from arbitrary source and target distributions. Our method generalizes both the score-matching loss used in the training of diffusion models and…

2023

A Heat Diffusion Perspective on Geodesic Preserving Dimensionality Reduction

NeurIPS 2023poster

Diffusion-based manifold learning methods have proven useful in representation learning and dimensionality reduction of modern high dimensional, high throughput, noisy datasets. Such datasets are especially present in fields like biology and physics. While it is thought that these methods preserve u…

2023

Neural FIM for learning Fisher information metrics from point cloud data

ICML 2023poster

Although data diffusion embeddings are ubiquitous in unsupervised learning and have proven to be a viable technique for uncovering the underlying intrinsic geometry of data, diffusion embeddings are inherently limited due to their discrete nature. To this end, we propose neural FIM, a method for com…