Chris (Yuhao) Liu

yliu298 [at] ucsc [dot] edu

I am a MSc student in Computer Science and Engineering at the University of California, Santa Cruz. I am also a researcher at Professor Jeffrey Flanigan's lab, a place where I have enjoyed working for the last two and a half years. I will apply for PhD in Fall 2022.

My current research focuses on fundamental problems in deep learning. I am particularly interested in demystifying generalization properties and behaviors in large and small neural networks (e.g., double descent, expressive capacity of large networks, data and model scaling laws, learning noise, lottery tickets, out-of-distribution generalization, neural tangent kernel, etc.). I am also working with Professor Yang Liu on unifying bias in data and machine.

Previously, I obtained my B.S. in Computer Science and Engineering at UC Santa Cruz.

My last name, Liu (刘 or 劉), is pronounced "Leo" but with shorter "[I]" sound.

Blog  /  CV  /  CV of Failure  /  Email  /  Github  /  LinkedIn

• [2022-06] I started an internship with Professor Yang Liu.

These included publications and preprints.

What Affects the Sample Complexity in Practice?
Chris Yuhao Liu, Jeffrey Flanigan
2022

We empirically estimate the power-law exponents of various model architectures and study how they are altered by a wide range of training conditions for classification.

Faster Sample Complexity Rates With Ensemble Filtering
Chris Yuhao Liu, Jeffrey Flanigan
2021

We present a dataset filtering approach that uses sets of classifiers, similar to ensembling, to estimate noisy (or non-realizable) examples and exclude them so a faster sample complexity rate is achievable in practice.

These include coursework and side projects.

Learning to Extract Compact Vector Representations from Weight Matrices
Chris Yuhao Liu
2022
[Paper] [Code] [Slides]

We study the problem of learning to construct compact representations of neural network weight matrices by projecting them into a smaller space.

Understanding biased datasets and machines requires rethinking bias from scratch
Chris Yuhao Liu, Yuhang Gan, Zichao Li, Ruilin Zhou
2022

We surveyed recent works on dataset bias and machine learning bias.

Sample Complexity Scaling Laws For Adversarial Training
Chris Yuhao Liu
2021
[Paper] [Code]

We show that adversarially training (Fast Gradient Sign Method and Projected Gradient Descent) reduces the empirically sample complexity rate for MLP and a variety of CNN architectures on MNIST and CIFAR-10.

TAPT: Text Augmentation Using Pre-Trained Transformers With Reinforcement Learning
2020
[Code]

Trained distilled RoBERTa model as a text classifier and a GPT-2 as a text generator trained using proximal policy optimization synchronously to generate augmented text for text classification tasks.

Conditional Generation of Research Paper Abstracts
2020
[Paper] [Code]

Fine-tuned a GPT-2 model using all research paper titles and abstracts under cs.AI, cs.LG, cs.CL, and cs.CV on arXiv. This project was the winner of the Generative Modeling Competition for the course CSE142 Machine Learning in Spring 2020.

Sentiment Analysis With Transformers
2020
[Code]

Fine-tuned a RoBERTa model on the IMDb dataset for sentiment analysis. This project was the winner of the Sentiment Analysis Competition for the course CSE142 Machine Learning in Spring 2020.

• Teaching Assistant, CSE 20 Beginning Programming in Python (Fall 2022)
• Teaching Assistant, CSE 20 Beginning Programming in Python (Spring 2022)
• Teaching Assistant, CSE 144 Applied Machine Learning (Winter 2022)
• Teaching Assistant, CSE 20 Beginning Programming in Python (Fall 2021)
• Volunteer, Thirty-eighth International Conference on Machine Learning (ICML 2021)
• Volunteer, Ninth International Conference on Learning Representations (ICLR 2021)
• Tutor and Reader, CSE 142 Machine Learning (Fall 2020)

This is a fork of Jon Barron"s website.