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Junwen Duan

11 accepted papers

2025

DDO: Dual-Decision Optimization for LLM-Based Medical Consultation via Multi-Agent Collaboration

EMNLP 2025

Large Language Models (LLMs) demonstrate strong generalization and reasoning abilities, making them well-suited for complex decision-making tasks such as medical consultation (MC). However, existing LLM-based methods often fail to capture the dual nature of MC, which entails two distinct sub-tasks:

2025

RUIE: Retrieval-based Unified Information Extraction using Large Language Model

COLING 2025main

Unified information extraction (UIE) aims to extract diverse structured information from unstructured text. While large language models (LLMs) have shown promise for UIE, they require significant computational resources and often struggle to generalize to unseen tasks. We propose RUIE (Retrieval-bas…

2025

Safe Inputs but Unsafe Output: Benchmarking Cross-modality Safety Alignment of Large Vision-Language Models

NAACL 2025findings

As Artificial General Intelligence (AGI) becomes increasingly integrated into various facets of human life, ensuring the safety and ethical alignment of such systems is paramount. Previous studies primarily focus on single-modality threats, which may not suffice given the integrated and complex natu…

Cited by 1SourcePDFScholar
2025

medIKAL: Integrating Knowledge Graphs as Assistants of LLMs for Enhanced Clinical Diagnosis on EMRs

COLING 2025main

Electronic Medical Records (EMRs), while integral to modern healthcare, present challenges for clinical reasoning and diagnosis due to their complexity and information redundancy. To address this, we proposed medIKAL (Integrating Knowledge Graphs as Assistants of LLMs), a framework that combines Lar…

2024

Faster Stochastic Variance Reduction Methods for Compositional MiniMax Optimization

AAAI 2024technical

This paper delves into the realm of stochastic optimization for compositional minimax optimization—a pivotal challenge across various machine learning domains, including deep AUC and reinforcement learning policy evaluation. Despite its significance, the problem of compositional minimax optimization…

Cited by 4SourcePDFScholar
2024

MARE: Multi-Aspect Rationale Extractor on Unsupervised Rationale Extraction

EMNLP 2024main

Unsupervised rationale extraction aims to extract text snippets to support model predictions without explicit rationale annotation.Researchers have made many efforts to solve this task. Previous works often encode each aspect independently, which may limit their ability to capture meaningful interna…

2024

Multi-modal Concept Alignment Pre-training for Generative Medical Visual Question Answering

ACL 2024findings

Medical Visual Question Answering (Med-VQA) seeks to accurately respond to queries regarding medical images, a task particularly challenging for open-ended questions. This study unveils the Multi-modal Concept Alignment Pre-training (MMCAP) approach for generative Med-VQA, leveraging a knowledge gra…

Cited by 3SourcePDFScholar
2023

CDA: A Contrastive Data Augmentation Method for Alzheimer’s Disease Detection

ACL 2023findings

Alzheimer’s Disease (AD) is a neurodegenerative disorder that significantly impacts a patient’s ability to communicate and organize language. Traditional methods for detecting AD, such as physical screening or neurological testing, can be challenging and time-consuming. Recent research has explored…

Cited by 9SourcePDFScholar
2023

Towards Better Representations for Multi-Label Text Classification with Multi-granularity Information

EMNLP 2023long findings

Multi-label text classification (MLTC) aims to assign multiple labels to a given text. Previous works have focused on text representation learning and label correlations modeling using pre-trained language models (PLMs). However, studies have shown that PLMs generate word frequency-oriented text re…

Cited by 0SourceScholar
2022

WSpeller: Robust Word Segmentation for Enhancing Chinese Spelling Check

EMNLP 2022finding

Chinese spelling check (CSC) detects and corrects spelling errors in Chinese texts. Previous approaches have combined character-level phonetic and graphic information, ignoring the importance of segment-level information. According to our pilot study, spelling errors are always associated with incor…