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Yen-Chang Hsu

22 accepted papers

2026

ToMoE: Converting Dense Large Language Models to Mixture-of-Experts through Dynamic Structural Pruning

ICML 2026poster

Large Language Models (LLMs) demonstrate remarkable capabilities but face deployment challenges due to their high computational demands. Traditional pruning methods reduce these costs by permanently removing parameters, which inevitably leads to performance degradation. To mitigate this issue, we pr…

Cited by 0SourcecodeScholar
2025

FlexiGPT: Pruning and Extending Large Language Models with Low-Rank Weight Sharing

NAACL 2025long

The rapid proliferation of large language models (LLMs) in natural language processing (NLP) has created a critical need for techniques that enable efficient deployment on memory-constrained devices without compromising performance. We present a method to prune LLMs that selectively prunes model blo…

2025

MoDeGPT: Modular Decomposition for Large Language Model Compression

ICLR 2025oral

Large Language Models (LLMs) have significantly advanced AI with their exceptional performance across a wide range of tasks. However, their extensive computational requirements restrict their use on devices with limited resources. While recent compression methods based on low-rank matrices show pote…

Cited by 7SourcePDFScholar
2025

Retraining-free Merging of Sparse MoE via Hierarchical Clustering

ICML 2025poster

Sparse Mixture-of-Experts (SMoE) models represent a significant advancement in large language model (LLM) development through their efficient parameter utilization. These models achieve substantial performance improvements at reduced inference costs. However, the deployment of SMoE models faces cons…

2024

Adaptive Rank Selections for Low-Rank Approximation of Language Models

NAACL 2024long

Singular Value Decomposition (SVD) or its weighted variants has significantly progressed in compressing language models. Previous works assume the same importance for all operations and assign the same number of ranks for different layers in a language model. However, such a uniform rank selection i…

2024

DISP-LLM: Dimension-Independent Structural Pruning for Large Language Models

NeurIPS 2024poster

Large Language Models (LLMs) have achieved remarkable success in various natural language processing tasks, including language modeling, understanding, and generation. However, the increased memory and computational costs associated with these models pose significant challenges for deployment on res…

2024

DynaMo: Accelerating Language Model Inference with Dynamic Multi-Token Sampling

NAACL 2024long

Traditional language models operate autoregressively, i.e., they predict one token at a time. Rapid explosion in model sizes has resulted in high inference times. In this work, we propose DynaMo, a suite of multi-token prediction language models that reduce net inference times. Our models *dynamical…

2024

SLiM: Speculative Decoding with Hypothesis Reduction

NAACL 2024findings

Speculative decoding has emerged as a prominent alternative to autoregressive decoding for expediting inference in large language models (LLMs). However, prevailing assumptions often focus solely on latency reduction, neglecting the computational expenses. In this paper, we present Speculate Less, v…

Cited by 3SourcePDFScholar
2023

Dynamic Low-rank Estimation for Transformer-based Language Models

EMNLP 2023long findings

Matrix decomposition methods, such as Singular Value Decomposition (SVD) and its importance-weighted variants, have been widely used for compressing Transformer-based language models. While importance-weighted decomposition methods alleviate the strong assumption of equal importance for each paramet…

Cited by 0SourceScholar
2023

Training Energy-Based Normalizing Flow with Score-Matching Objectives

NeurIPS 2023poster

In this paper, we establish a connection between the parameterization of flow-based and energy-based generative models, and present a new flow-based modeling approach called energy-based normalizing flow (EBFlow). We demonstrate that by optimizing EBFlow with score-matching objectives, the computati…

2022

Language model compression with weighted low-rank factorization

ICLR 2022poster

Factorizing a large matrix into small matrices is a popular strategy for model compression. Singular value decomposition (SVD) plays a vital role in this compression strategy, approximating a learned matrix with fewer parameters. However, SVD minimizes the squared error toward reconstructing the ori…

Cited by 113SourcePDFScholar
2022

Numerical Optimizations for Weighted Low-rank Estimation on Language Models

EMNLP 2022main

Singular value decomposition (SVD) is one of the most popular compression methods that approximate a target matrix with smaller matrices. However, standard SVD treats the parameters within the matrix with equal importance, which is a simple but unrealistic assumption. The parameters of a trained neu…

Cited by 14SourcePDFScholar
2021

A Geometric Perspective towards Neural Calibration via Sensitivity Decomposition

NeurIPS 2021spotlight

It is well known that vision classification models suffer from poor calibration in the face of data distribution shifts. In this paper, we take a geometric approach to this problem. We propose Geometric Sensitivity Decomposition (GSD) which decomposes the norm of a sample feature embedding and the a…

2021

Always Be Dreaming: A New Approach for Data-Free Class-Incremental Learning

ICCV 2021poster

Modern computer vision applications suffer from catastrophic forgetting when incrementally learning new concepts over time. The most successful approaches to alleviate this forgetting require extensive replay of previously seen data, which is problematic when memory constraints or data legality conc…

Cited by 219PDFcodeScholar
2021

Enhancing the generalization for Intent Classification and Out-of-Domain Detection in SLU

ACL 2021long

Intent classification is a major task in spoken language understanding (SLU). Since most models are built with pre-collected in-domain (IND) training utterances, their ability to detect unsupported out-of-domain (OOD) utterances has a critical effect in practical use. Recent works have shown that us…

Cited by 45SourcePDFScholar
2021

Hyperparameter-free Continuous Learning for Domain Classification in Natural Language Understanding

NAACL 2021long

Domain classification is the fundamental task in natural language understanding (NLU), which often requires fast accommodation to new emerging domains. This constraint makes it impossible to retrain all previous domains, even if they are accessible to the new model. Most existing continual learning…

2020

Generalized ODIN: Detecting Out-of-Distribution Image Without Learning From Out-of-Distribution Data

CVPR 2020poster

Deep neural networks have attained remarkable performance when applied to data that comes from the same distribution as that of the training set, but can significantly degrade otherwise. Therefore, detecting whether an example is out-of-distribution (OoD) is crucial to enable a system that can rejec…

Cited by 725PDFScholar
2020

Posterior Re-calibration for Imbalanced Datasets

NeurIPS 2020poster

Neural Networks can perform poorly when the training label distribution is heavily imbalanced, as well as when the testing data differs from the training distribution. In order to deal with shift in the testing label distribution, which imbalance causes, we motivate the problem from the perspective…

2019

Multi-class classification without multi-class labels

ICLR 2019poster

This work presents a new strategy for multi-class classification that requires no class-specific labels, but instead leverages pairwise similarity between examples, which is a weaker form of annotation. The proposed method, meta classification learning, optimizes a binary classifier for pairwise sim…