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Xiang Wan

44 accepted papers

2026

DGSAN: Dual-Graph Spatiotemporal Attention Network for Pulmonary Nodule Malignancy Prediction

AAAI 2026technical

Lung cancer continues to be the leading cause of cancer-related deaths globally. Early detection and diagnosis of pulmonary nodules are essential for improving patient survival rates. Although previous research has integrated multimodal and multi-temporal information, outperforming single modality a

Cited by 0SourcePDFScholar
2026

Eliminating Inductive Bias in Reward Models with Information-Theoretic Guidance

ICLR 2026poster

Reward models (RMs) are crucial in reinforcement learning from human feedback (RLHF) to align large language models (LLMs) with human values. However, RM training data is commonly recognized as low-quality, always containing preference conflicts and inductive biases, such as response length or speak…

Cited by 0SourcecodeScholar
2026

StreamRAG: Enhancing Real-Time Video Understanding with Retrieval Augmentation

CVPR 2026

The transition of Retrieval-Augmented Generation (RAG) from offline video analysis to online, streaming scenarios presents a set of critical, unexplored challenges. These include the need for on-the-fly semantic segmentation of continuous video, the inherent tension between low-latency processing an

Cited by 0SourceScholar
2025

APLOT: Robust Reward Modeling via Adaptive Preference Learning with Optimal Transport

EMNLP 2025

The reward model (RM) plays a crucial role in aligning Large Language Models (LLMs) with human preferences through Reinforcement Learning, where the Bradley-Terry (BT) objective has been recognized as simple yet powerful, specifically for pairwise preference learning. However, BT-based RMs often str

2025

AdaDrive: Self-Adaptive Slow-Fast System for Language-Grounded Autonomous Driving

ICCV 2025poster

Effectively integrating Large Language Models (LLMs) into autonomous driving requires a balance between leveraging high-level reasoning and maintaining real-time efficiency. Existing approaches either activate LLMs too frequently, causing excessive computational overhead, or use fixed schedules, fai…

2025

Add-One-In: Incremental Sample Selection for Large Language Models via a Choice-Based Greedy Paradigm

EMNLP 2025

Selecting high-quality and diverse training samples from extensive datasets plays a crucial role in reducing training overhead and enhancing the performance of Large Language Models (LLMs). However, existing studies fall short in assessing the overall value of selected data, focusing primarily on in

2025

Atoxia: Red-teaming Large Language Models with Target Toxic Answers

NAACL 2025findings

Despite the substantial advancements in artificial intelligence, large language models (LLMs) remain being challenged by generation safety. With adversarial jailbreaking prompts, one can effortlessly induce LLMs to output harmful content, causing unexpected negative social impacts. This vulnerabilit…

2025

CoD, Towards an Interpretable Medical Agent using Chain of Diagnosis

ACL 2025finding

The field of AI healthcare has undergone a significant transformation with the advent of large language models (LLMs), yet the challenges of interpretability within these models remain largely unaddressed. This study introduces **Chain-of-Diagnosis (CoD)** to enhance the interpretability of medical…

2025

Domain Generalized Medical Landmark Detection via Robust Boundary-Aware Pre-Training

AAAI 2025technical

In recent years, deep learning has revenue in automated medical landmark detection. Nonetheless, prevailing research in this field predominantly addresses single-center scenarios or domain adaptation settings. In practical environments, the acquisition of multi-center data faces privacy concerns, co…

2025

Huatuo-26M, a Large-scale Chinese Medical QA Dataset

NAACL 2025findings

Large Language Models infuse newfound vigor into the advancement of the medical domain, yet the scarcity of data poses a significant bottleneck hindering community progress. In this paper, we release the largest ever medical Question Answering (QA) dataset with 26 Million QA pairs named Huatuo-26M.…

2025

Intermediate Domain Alignment and Morphology Analogy for Patent-Product Image Retrieval

NeurIPS 2025poster

Recent advances in artificial intelligence have significantly impacted image retrieval tasks, yet Patent-Product Image Retrieval (PPIR) has received limited attention. PPIR, which retrieves patent images based on product images to identify potential infringements, presents unique challenges: (1) bot…

Cited by 0SourcecodeScholar
2025

MLLM-Bench: Evaluating Multimodal LLMs with Per-sample Criteria

NAACL 2025long

Multimodal large language models (MLLMs) have broadened the scope of AI applications. Existing automatic evaluation methodologies for MLLMs are mainly limited in evaluating objective queries without considering real-world user experiences, inadequately addressing the nuances of creative and associat…

2025

Self-Instructed Derived Prompt Generation Meets In-Context Learning: Unlocking New Potential of Black-Box LLMs

ACL 2025long

Improving prompt quality is crucial for enhancing the performance of large language models (LLMs), particularly for Black-Box models like GPT4. Existing prompt refinement methods, while effective, often suffer from semantic inconsistencies between refined and original prompts, and fail to maintain u…

Cited by 0SourcePDFScholar
2025

Unlocking LLMs’ Self-Improvement Capacity with Autonomous Learning for Domain Adaptation

ACL 2025finding

Self-supervised pre-training and instruction fine-tuning demonstrate the potential of large language models (LLMs) for domain adaptation (DA). In pursuit of superhuman performance, LLMs have demonstrated significant potential in math and coding through self-improvement algorithms that rely on iterat…

2025

VLDrive: Vision-Augmented Lightweight MLLMs for Efficient Language-grounded Autonomous Driving

ICCV 2025poster

Recent advancements in language-grounded autonomous driving have been significantly promoted by the sophisticated cognition and reasoning capabilities of large language models (LLMs). However, current LLM-based approaches encounter critical challenges: (1) Failure analysis reveals that frequent coll…

2024

AceGPT, Localizing Large Language Models in Arabic

NAACL 2024long

This paper is devoted to the development of a localized Large Language Model (LLM) specifically for Arabic, a language imbued with unique cultural characteristics inadequately addressed by current mainstream models. Significant concerns emerge when addressing cultural sensitivity and local values. T…

2024

CMB: A Comprehensive Medical Benchmark in Chinese

NAACL 2024long

Large Language Models (LLMs) provide a possibility to make a great breakthrough in medicine. The establishment of a standardized medical benchmark becomes a fundamental cornerstone to measure progression. However, medical environments in different regions have their local characteristics, e.g., the…

2024

PlatoLM: Teaching LLMs in Multi-Round Dialogue via a User Simulator

ACL 2024long

The unparalleled performance of closed-sourced ChatGPT has sparked efforts towards its democratization, with notable strides made by leveraging real user and ChatGPT dialogues, as evidenced by Vicuna. However, due to challenges in gathering dialogues involving human participation, current endeavors…

Cited by 5SourcePDFScholar
2024

Towards Injecting Medical Visual Knowledge into Multimodal LLMs at Scale

EMNLP 2024main

The rapid development of multimodal large language models (MLLMs), such as GPT-4V, has led to significant advancements. However, these models still face challenges in medical multimodal capabilities due to limitations in the quantity and quality of medical vision-text data, stemming from data privac…

2024

UniCell: Universal Cell Nucleus Classification via Prompt Learning

AAAI 2024technical

The recognition of multi-class cell nuclei can significantly facilitate the process of histopathological diagnosis. Numerous pathological datasets are currently available, but their annotations are inconsistent. Most existing methods require individual training on each dataset to deduce the relevant…

2024

WhodunitBench: Evaluating Large Multimodal Agents via Murder Mystery Games

NeurIPS 2024spotlight

Recently, large language models (LLMs) have achieved superior performance, empowering the development of large multimodal agents (LMAs). An LMA is anticipated to execute practical tasks requires various capabilities including multimodal perception, interaction, reasoning, and decision making. Howeve…

Cited by 1SourcePDFScholar
2023

A Simple Yet Effective Subsequence-Enhanced Approach for Cross-Domain NER

AAAI 2023technical

Cross-domain named entity recognition (NER), aiming to address the limitation of labeled resources in the target domain, is a challenging yet important task. Most existing studies alleviate the data discrepancy across different domains at the coarse level via combing NER with language modelings or i…

2023

Advancing Visual Grounding With Scene Knowledge: Benchmark and Method

CVPR 2023poster

Visual grounding (VG) aims to establish fine-grained alignment between vision and language. Ideally, it can be a testbed for vision-and-language models to evaluate their understanding of the images and texts and their reasoning abilities over their joint space. However, most existing VG datasets are…

2023

Affine-Consistent Transformer for Multi-Class Cell Nuclei Detection

ICCV 2023poster

Multi-class cell nuclei detection is a fundamental prerequisite in the diagnosis of histopathology. It is critical to efficiently locate and identify cells with diverse morphology and distributions in digital pathological images. Most existing methods take complex intermediate representations as lea…

Cited by 15PDFcodeScholar
2023

Bridging Vision and Language Encoders: Parameter-Efficient Tuning for Referring Image Segmentation

ICCV 2023poster

Parameter efficient tuning (PET) has received considerable attention owing to its applicability to reduce the number of parameters that need to be updated while maintaining competitive performance and providing better hardware resource savings. Although substantial progress has been made, most exist…

Cited by 73PDFcodeScholar
2023

EASAL: Entity-Aware Subsequence-Based Active Learning for Named Entity Recognition

AAAI 2023technical

Active learning is a critical technique for reducing labelling load by selecting the most informative data. Most previous works applied active learning on Named Entity Recognition (token-level task) similar to the text classification (sentence-level task). They failed to consider the heterogeneity o…

2023

HuatuoGPT, Towards Taming Language Model to Be a Doctor

EMNLP 2023long findings

In this paper, we present HuatuoGPT, a Large Language Model (LLM) for medical consultation. The core recipe of HuatuoGPT is to leverage both distilled data from **ChatGPT** and real-world data from **doctors** in the supervised fine-tuning stage. This is not only because purely using **ChatGPT**-di…

Cited by 0SourcecodeScholar
2023

Improving Grammatical Error Correction with Multimodal Feature Integration

ACL 2023findings

Grammatical error correction (GEC) is a promising task aimed at correcting errors in a text. Many methods have been proposed to facilitate this task with remarkable results. However, most of them only focus on enhancing textual feature extraction without exploring the usage of other modalities’ info…

2023

Improving Radiology Summarization with Radiograph and Anatomy Prompts

ACL 2023findings

The impression is crucial for the referring physicians to grasp key information since it is concluded from the findings and reasoning of radiologists. To alleviate the workload of radiologists and reduce repetitive human labor in impression writing, many researchers have focused on automatic impress…

2023

On the Difference of BERT-style and CLIP-style Text Encoders

ACL 2023findings

Masked language modeling (MLM) has been one of the most popular pretraining recipes in natural language processing, e.g., BERT, one of the representative models. Recently, contrastive language-image pretraining (CLIP) has also attracted attention, especially its vision models that achieve excellent…

2023

One Cannot Stand for Everyone! Leveraging Multiple User Simulators to train Task-oriented Dialogue Systems

ACL 2023long

User simulators are agents designed to imitate human users; recent advances have found that Task-oriented Dialogue (ToD) systems optimized toward a user simulator could better satisfy the need of human users. However, this might result in a sub-optimal ToD system if it is tailored to only one ad hoc…

Cited by 16SourcePDFScholar
2023

Toward Expanding the Scope of Radiology Report Summarization to Multiple Anatomies and Modalities

ACL 2023short

Radiology report summarization (RRS) is a growing area of research. Given the Findings section of a radiology report, the goal is to generate a summary (called an Impression section) that highlights the key observations and conclusions of the radiology study. However, RRS currently faces essential l…

2023

Towards Unifying Medical Vision-and-Language Pre-Training via Soft Prompts

ICCV 2023poster

Medical vision-and-language pre-training (Med-VLP) has shown promising improvements on many downstream medical tasks owing to its applicability to extracting generic representations from medical images and texts. Practically, there exist two typical types, i.e., the fusion-encoder type and the dual-…

Cited by 39PDFcodeScholar
2022

A Label-Aware Autoregressive Framework for Cross-Domain NER

NAACL 2022findings

Cross-domain named entity recognition (NER) aims to borrow the entity information from the source domain to help the entity recognition in the target domain with limited labeled data. Despite the promising performance of existing approaches, most of them focus on reducing the discrepancy of token re…

2022

A Simple yet Effective Relation Information Guided Approach for Few-Shot Relation Extraction

ACL 2022findings

Few-Shot Relation Extraction aims at predicting the relation for a pair of entities in a sentence by training with a few labelled examples in each relation. Some recent works have introduced relation information (i.e., relation labels or descriptions) to assist model learning based on Prototype Netw…

2022

AMOS: A Large-Scale Abdominal Multi-Organ Benchmark for Versatile Medical Image Segmentation

NeurIPS 2022accept

Despite the considerable progress in automatic abdominal multi-organ segmentation from CT/MRI scans in recent years, a comprehensive evaluation of the models' capabilities is hampered by the lack of a large-scale benchmark from diverse clinical scenarios. Constraint by the high cost of collecting an…

2022

Graph Enhanced Contrastive Learning for Radiology Findings Summarization

ACL 2022long

The impression section of a radiology report summarizes the most prominent observation from the findings section and is the most important section for radiologists to communicate to physicians. Summarizing findings is time-consuming and can be prone to error for inexperienced radiologists, and thus…

2022

Hero-Gang Neural Model For Named Entity Recognition

NAACL 2022long

Named entity recognition (NER) is a fundamental and important task in NLP, aiming at identifying named entities (NEs) from free text. Recently, since the multi-head attention mechanism applied in the Transformer model can effectively capture longer contextual information, Transformer-based models ha…

2022

Learn from Relation Information: Towards Prototype Representation Rectification for Few-Shot Relation Extraction

NAACL 2022findings

Few-shot Relation Extraction refers to fast adaptation to novel relation classes with few samples through training on the known relation classes. Most existing methods focus on implicitly introducing relation information (i.e., relation label or relation description) to constrain the prototype repre…

2022

Weakly Supervised Object Localization via Transformer with Implicit Spatial Calibration

ECCV 2022poster

"Weakly Supervised Object Localization (WSOL), which aims to localize objects by only using image-level labels, has attracted much attention because of its low annotation cost in real applications. Recent studies leverage the advantage of self-attention in visual Transformer for long-range dependenc…

2021

Cross-modal Memory Networks for Radiology Report Generation

ACL 2021long

Medical imaging plays a significant role in clinical practice of medical diagnosis, where the text reports of the images are essential in understanding them and facilitating later treatments. By generating the reports automatically, it is beneficial to help lighten the burden of radiologists and sig…

2021

Dependency-driven Relation Extraction with Attentive Graph Convolutional Networks

ACL 2021long

Syntactic information, especially dependency trees, has been widely used by existing studies to improve relation extraction with better semantic guidance for analyzing the context information associated with the given entities. However, most existing studies suffer from the noise in the dependency t…

2021

Field Embedding: A Unified Grain-Based Framework for Word Representation

NAACL 2021long

Word representations empowered with additional linguistic information have been widely studied and proved to outperform traditional embeddings. Current methods mainly focus on learning embeddings for words while embeddings of linguistic information (referred to as grain embeddings) are discarded aft…

Cited by 2SourcePDFScholar