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Namhoon Lee

18 accepted papers

2026

The Unseen Frontier: Pushing the Limits of LLM Sparsity with Surrogate-Free ADMM

ICLR 2026poster

Neural network pruning is a promising technique to mitigate the excessive computational and memory requirements of large language models (LLMs). Despite its promise, however, progress in this area has diminished, as conventional methods are seemingly unable to surpass moderate sparsity levels (50-60…

Cited by 0SourcecodeScholar
2025

An Analysis of Concept Bottleneck Models: Measuring, Understanding, and Mitigating the Impact of Noisy Annotations

NeurIPS 2025poster

Concept bottleneck models (CBMs) ensure interpretability by decomposing predictions into human interpretable concepts. Yet the annotations used for training CBMs that enable this transparency are often noisy, and the impact of such corruption is not well understood. In this study, we present the fir…

Cited by 0SourceScholar
2025

Critical Influence of Overparameterization on Sharpness-aware Minimization

UAI 2025

Training overparameterized neural networks often yields solutions with varying generalization capabilities, even when achieving similar training losses. Recent evidence indicates a strong correlation between the sharpness of a minimum and its generalization error, leading to increased interest in op

2025

MemEIC: A Step Toward Continual and Compositional Knowledge Editing

NeurIPS 2025poster

The dynamic nature of information necessitates continuously updating large vision-language models (LVLMs). While recent knowledge editing techniques hint at promising directions, they often focus on editing a single modality (vision or language) in isolation. This prevalent practice neglects the inh…

Cited by 2SourcecodeScholar
2025

Sassha: Sharpness-aware Adaptive Second-order Optimization with Stable Hessian Approximation

ICML 2025poster

Approximate second-order optimization methods often exhibit poorer generalization compared to first-order approaches. In this work, we look into this issue through the lens of the loss landscape and find that existing second-order methods tend to converge to sharper minima compared to SGD. In respo…

2025

ZIP: An Efficient Zeroth-order Prompt Tuning for Black-box Vision-Language Models

ICLR 2025poster

Recent studies have introduced various approaches for prompt-tuning black-box vision-language models, referred to as black-box prompt-tuning (BBPT). While BBPT has demonstrated considerable potential, it is often found that many existing methods require an excessive number of queries (i.e., function…

Cited by 0SourcePDFScholar
2024

Rethinking Pruning Large Language Models: Benefits and Pitfalls of Reconstruction Error Minimization

EMNLP 2024main

This work suggests fundamentally rethinking the current practice of pruning large language models (LLMs). The way it is done is by divide and conquer: split the model into submodels, sequentially prune them, and reconstruct predictions of the dense counterparts on small calibration data one at a tim…

2024

The Role of Masking for Efficient Supervised Knowledge Distillation of Vision Transformers

ECCV 2024poster

"Knowledge distillation is an effective method for training lightweight vision models. However, acquiring teacher supervision for training samples is often costly, especially from large-scale models like vision transformers (ViTs). In this paper, we develop a simple framework to reduce the supervisi…

Cited by 1SourcePDFScholar
2023

A Closer Look at the Intervention Procedure of Concept Bottleneck Models

ICML 2023poster

Concept bottleneck models (CBMs) are a class of interpretable neural network models that predict the target response of a given input based on its high-level concepts. Unlike the standard end-to-end models, CBMs enable domain experts to intervene on the predicted concepts and rectify any mistakes at…

2021

Understanding the effects of data parallelism and sparsity on neural network training

ICLR 2021poster

We study two factors in neural network training: data parallelism and sparsity; here, data parallelism means processing training data in parallel using distributed systems (or equivalently increasing batch size), so that training can be accelerated; for sparsity, we refer to pruning parameters in a…

Cited by 9SourcePDFScholar
2020

A Signal Propagation Perspective for Pruning Neural Networks at Initialization

ICLR 2020spotlight

Network pruning is a promising avenue for compressing deep neural networks. A typical approach to pruning starts by training a model and then removing redundant parameters while minimizing the impact on what is learned. Alternatively, a recent approach shows that pruning can be done at initializatio…

Cited by 198SourcecodeScholar
2019

SNIP: SINGLE-SHOT NETWORK PRUNING BASED ON CONNECTION SENSITIVITY

ICLR 2019poster

Pruning large neural networks while maintaining their performance is often desirable due to the reduced space and time complexity. In existing methods, pruning is done within an iterative optimization procedure with either heuristically designed pruning schedules or additional hyperparameters, under…

2017

DESIRE: Distant Future Prediction in Dynamic Scenes With Interacting Agents

CVPR 2017spotlight

We introduce a Deep Stochastic IOC RNN Encoder-decoder framework, DESIRE, for the task of future predictions of multiple interacting agents in dynamic scenes. DESIRE effectively predicts future locations of objects in multiple scenes by 1) accounting for the multi-modal nature of the future predicti…

Cited by 1105PDFScholar
2017

Forecasting Interactive Dynamics of Pedestrians With Fictitious Play

CVPR 2017poster

We develop predictive models of pedestrian dynamics by encoding the coupled nature of multi-pedestrian interaction using game theory and deep learning-based visual analysis to estimate person-specific behavior parameters. We focus on predictive models since they are important for developing interact…

Cited by 215PDFScholar