Search Results for author: Yuchen Wu

Found 13 papers, 3 papers with code

Theoretical Insights for Diffusion Guidance: A Case Study for Gaussian Mixture Models

no code implementations3 Mar 2024 Yuchen Wu, Minshuo Chen, Zihao Li, Mengdi Wang, Yuting Wei

Diffusion models benefit from instillation of task-specific information into the score function to steer the sample generation towards desired properties.

Image Generation

Failures and Successes of Cross-Validation for Early-Stopped Gradient Descent

no code implementations26 Feb 2024 Pratik Patil, Yuchen Wu, Ryan J. Tibshirani

We analyze the statistical properties of generalized cross-validation (GCV) and leave-one-out cross-validation (LOOCV) applied to early-stopped gradient descent (GD) in high-dimensional least squares regression.

Prediction Intervals regression

Sharp Analysis of Power Iteration for Tensor PCA

no code implementations2 Jan 2024 Yuchen Wu, Kangjie Zhou

We investigate the power iteration algorithm for the tensor PCA model introduced in Richard and Montanari (2014).

Deep Networks as Denoising Algorithms: Sample-Efficient Learning of Diffusion Models in High-Dimensional Graphical Models

no code implementations20 Sep 2023 Song Mei, Yuchen Wu

We investigate the approximation efficiency of score functions by deep neural networks in diffusion-based generative modeling.

Denoising Efficient Neural Network +1

Gestalt-Guided Image Understanding for Few-Shot Learning

1 code implementation8 Feb 2023 Kun Song, Yuchen Wu, Jiansheng Chen, Tianyu Hu, Huimin Ma

Due to the scarcity of available data, deep learning does not perform well on few-shot learning tasks.

Few-Shot Learning

Lower Bounds for the Convergence of Tensor Power Iteration on Random Overcomplete Models

no code implementations7 Nov 2022 Yuchen Wu, Kangjie Zhou

In this paper, we analyze the dynamics of tensor power iteration from random initialization in the overcomplete regime.

LEMMA Tensor Decomposition

Adversarial Examples in Random Neural Networks with General Activations

no code implementations31 Mar 2022 Andrea Montanari, Yuchen Wu

A substantial body of empirical work documents the lack of robustness in deep learning models to adversarial examples.

Shaping Rewards for Reinforcement Learning with Imperfect Demonstrations using Generative Models

no code implementations2 Nov 2020 Yuchen Wu, Melissa Mozifian, Florian Shkurti

Unlike the majority of existing methods that assume optimal demonstrations and incorporate the demonstration data as hard constraints on policy optimization, we instead incorporate demonstration data as advice in the form of a reward shaping potential trained as a generative model of states and actions.

Imitation Learning reinforcement-learning +1

The estimation error of general first order methods

no code implementations28 Feb 2020 Michael Celentano, Andrea Montanari, Yuchen Wu

These lower bounds are optimal in the sense that there exist algorithms whose estimation error matches the lower bounds up to asymptotically negligible terms.

Retrieval

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