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Xiaocheng Feng

53 accepted papers

2026

CCFQA: A Benchmark for Cross-Lingual and Cross-Modal Speech and Text Factuality Evaluation

AAAI 2026technical

As Large Language Models (LLMs) are increasingly popularized in the multilingual world, ensuring hallucination-free factuality becomes markedly crucial. However, existing benchmarks for evaluating the reliability of Multimodal Large Language Models (MLLMs) predominantly focus on textual or visual m

Cited by 0SourcePDFScholar
2026

Causal Tracing of Object Representations in Large Vision Language Models: Mechanistic Interpretability and Hallucination Mitigation

AAAI 2026technical

Despite the remarkable advancements of Large Vision-Language Models (LVLMs), the mechanistic interpretability remains underexplored. Existing analyses are insufficiently comprehensive and lack examination covering visual and textual tokens, model components, and the full range of layers. This limita

Cited by 0SourcePDFScholar
2026

Focus Like a Human: Efficient GUI Grounding via Coarse-to-Fine Visual Attention and Parallel Verification

IJCAI 2026

Building upon powerful Large Visual Language Models, recent GUI agents have revolutionized autonomous GUI interaction. Given the high information density and structural complexity of GUI layouts, a critical challenge lies in accurately identifying where to focus, i.e., precise GUI grounding. To ensu

Cited by 0Scholar
2026

LangGPS: Language Separability Guided Data Pre-Selection for Joint Multilingual Instruction Tuning

AAAI 2026technical

Joint multilingual instruction tuning is a widely adopted approach to improve the multilingual instruction-following ability and downstream performance of large language models (LLMs), but the resulting multilingual capability remains highly sensitive to the composition and selection of the training

Cited by 0SourcePDFScholar
2026

Learning Depth from Past Selves: Self-Evolution Contrast for Robust Depth Estimation

AAAI 2026technical

Self-supervised depth estimation has gained significant attention in autonomous driving and robotics. However, existing methods exhibit substantial performance degradation under adverse weather conditions such as rain and fog, where reduced visibility critically impairs depth prediction. To address

Cited by 0SourcePDFScholar
2026

PERSONA: Dynamic and Compositional Inference-Time Personality Control via Activation Vector Algebra

ICLR 2026poster

Current methods for personality control in Large Language Models rely on static prompting or expensive fine-tuning, failing to capture the dynamic and compositional nature of human traits. We introduce PERSONA, a training-free framework that achieves fine-tuning level performance through direct mani…

Cited by 0SourceScholar
2026

TI-3DGS: 3D Thermal Reconstruction Via Thermal Imaging-Guided 3D Gaussian Splatting

ICRA 2026poster

Thermal imaging, with its all-weather capabilities and strong penetration, enables 3D reconstruction in low- light and adverse conditions. In this paper, we investigate RGB-independent pure 3D thermal reconstruction, aiming to overcome the challenges of 3D reconstruction in extreme environments wher…

Cited by 0Scholar
2026

The Visual Prism: Refracting Images into Parallel Multilingual Descriptions with Structured Visual Guidance

AAAI 2026technical

Parallel corpora, as the foundation of machine translation, remain crucial even in the era of large language models (LLMs) for pre-training and fine-tuning. However, annotating parallel corpora is extremely costly, as it requires annotators to be proficient in multiple languages. To reduce this cost

Cited by 0SourcePDFScholar
2025

Alleviating Hallucinations from Knowledge Misalignment in Large Language Models via Selective Abstention Learning

ACL 2025long

Large language models (LLMs) are known to suffer from severe hallucination issues. One of the main causes lies in the knowledge misalignment between the pre-training stage and the supervised fine-tuning stage. The unfamiliar knowledge encountered during fine-tuning may encourage LLMs to generate fac…

2025

CC-Tuning: A Cross-Lingual Connection Mechanism for Improving Joint Multilingual Supervised Fine-Tuning

ACL 2025long

Current large language models (LLMs) often exhibit imbalanced multilingual capabilities due to their English-centric training corpora. To address this, existing fine-tuning approaches operating at the data-level (e.g., through data augmentation or distillation) typically introduce implicit cross-lin…

Cited by 0SourcePDFScholar
2025

CLAIM: Mitigating Multilingual Object Hallucination in Large Vision-Language Models with Cross-Lingual Attention Intervention

ACL 2025long

Large Vision-Language Models (LVLMs) have demonstrated impressive multimodal abilities but remain prone to multilingual object hallucination, with a higher likelihood of generating responses inconsistent with the visual input when utilizing queries in non-English languages compared to English. Most…

Cited by 0SourcePDFScholar
2025

CoMT: A Novel Benchmark for Chain of Multi-modal Thought on Large Vision-Language Models

AAAI 2025technical

Large Vision-Language Models (LVLMs) have recently demonstrated amazing success in multi-modal tasks, including advancements in Multi-modal Chain-of-Thought (MCoT) reasoning. Despite these successes, current benchmarks still follow a traditional paradigm with multi-modal input and text-modal output,…

2025

Context-Aware Hierarchical Taxonomy Generation for Scientific Papers via LLM-Guided Multi-Aspect Clustering

EMNLP 2025

The rapid growth of scientific literature demands efficient methods to organize and synthesize research findings. Existing taxonomy construction methods, leveraging unsupervised clustering or direct prompting of large language models (LLMs), often lack coherence and granularity. We propose a novel c

Cited by 0SourcePDFScholar
2025

Cross-Lingual Text-Rich Visual Comprehension: An Information Theory Perspective

AAAI 2025technical

Recent Large Vision-Language Models (LVLMs) have shown promising reasoning capabilities on text-rich images from charts, tables, and documents. However, the abundant text within such images may increase the model's sensitivity to language. This raises the need to evaluate LVLM performance on cross-…

2025

Enhancing Non-English Capabilities of English-Centric Large Language Models Through Deep Supervision Fine-Tuning

AAAI 2025technical

Large language models (LLMs) have demonstrated significant progress in multilingual language understanding and generation. However, due to the imbalance in training data, their capabilities in non-English languages are limited. Recent studies revealed the English-pivot multilingual mechanism of LLMs…

2025

FroM: Frobenius Norm-Based Data-Free Adaptive Model Merging

EMNLP 2025

With the development of large language models, fine-tuning has emerged as an effective method to enhance performance in specific scenarios by injecting domain-specific knowledge. In this context, model merging techniques provide a solution for fusing knowledge from multiple fine-tuning models by com

2025

From Hypothesis to Publication: A Comprehensive Survey of AI-Driven Research Support Systems

EMNLP 2025

Research is a fundamental process driving the advancement of human civilization, yet it demands substantial time and effort from researchers. In recent years, the rapid development of artificial intelligence (AI) technologies has inspired researchers to explore how AI can accelerate and enhance rese

Cited by 0SourcePDFScholar
2025

Improving Contextual Faithfulness of Large Language Models via Retrieval Heads-Induced Optimization

ACL 2025long

Ensuring contextual faithfulness in retrieval-augmented large language models (LLMs) is crucial for building trustworthy information-seeking systems, particularly in long-form question-answering (LFQA) scenarios. In this work, we identify a salient correlation between LFQA faithfulness and retrieval…

2025

Language-Specific Layer Matters: Efficient Multilingual Enhancement for Large Vision-Language Models

EMNLP 2025

Large vision-language models (LVLMs) have demonstrated exceptional capabilities in understanding visual information with human languages but also exhibit an imbalance in multilingual capabilities. In this work, we delve into the multilingual working pattern of LVLMs and identify a salient correlatio

2025

Length Controlled Generation for Black-box LLMs

ACL 2025long

Large language models (LLMs) have demonstrated impressive instruction following capabilities, while still struggling to accurately manage the length of the generated text, which is a fundamental requirement in many real-world applications. Existing length control methods involve fine-tuning the para…

2025

One for All: Update Parameterized Knowledge Across Multiple Models with Once Edit

ACL 2025long

Large language models (LLMs) encode vast world knowledge but struggle to stay up-to-date, often leading to errors and hallucinations. Knowledge editing offers an efficient alternative to retraining, enabling targeted modifications by updating specific model parameters. However, existing methods prim…

Cited by 0SourcePDFScholar
2025

Probing and Boosting Large Language Models Capabilities via Attention Heads

EMNLP 2025

Understanding the internal origins of capabilities in large language models (LLMs) is crucial for interpretability and efficient adaptation. However, the emergence of specific capabilities remains poorly understood, as most existing approaches rely on external signals (e.g., performance shifts or gr

2025

SLAM: Towards Efficient Multilingual Reasoning via Selective Language Alignment

COLING 2025main

Despite the significant improvements achieved by large language models (LLMs) in English reasoning tasks, these models continue to struggle with multilingual reasoning. Recent studies leverage a full-parameter and two-stage training paradigm to teach models to first understand non-English questions…

2025

Unveiling Entity-Level Unlearning for Large Language Models: A Comprehensive Analysis

COLING 2025main

Large language model unlearning has garnered increasing attention due to its potential to address security and privacy concerns, leading to extensive research in the field. However, existing studies have predominantly focused on instance-level unlearning, specifically targeting the removal of predef…

Cited by 1SourcePDFScholar
2024

Advancing Large Language Model Attribution through Self-Improving

EMNLP 2024main

Teaching large language models (LLMs) to generate text with citations to evidence sources can mitigate hallucinations and enhance verifiability in information-seeking systems. However, improving this capability requires high-quality attribution data, which is costly and labor-intensive. Inspired by…

Cited by 6SourcePDFScholar
2024

Aligning Translation-Specific Understanding to General Understanding in Large Language Models

EMNLP 2024main

Large Language models (LLMs) have exhibited remarkable abilities in understanding complex texts, offering a promising path towards human-like translation performance. However, this study reveals the misalignment between the translation-specific understanding and the general understanding inside LLMs…

2024

An Information Bottleneck Perspective for Effective Noise Filtering on Retrieval-Augmented Generation

ACL 2024long

Retrieval-augmented generation integrates the capabilities of large language models with relevant information retrieved from an extensive corpus, yet encounters challenges when confronted with real-world noisy data. One recent solution is to train a filter module to find relevant content but only ac…

2024

Discrete Modeling via Boundary Conditional Diffusion Processes

NeurIPS 2024poster

We present an novel framework for efficiently and effectively extending the powerful continuous diffusion processes to discrete modeling. Previous approaches have suffered from the discrepancy between discrete data and continuous modeling. Our study reveals that the absence of guidance from discrete…

Cited by 0SourcePDFScholar
2024

Ensemble Learning for Heterogeneous Large Language Models with Deep Parallel Collaboration

NeurIPS 2024spotlight

Large language models (LLMs) exhibit complementary strengths in various tasks, motivating the research of LLM ensembling. However, existing work focuses on training an extra reward model or fusion model to select or combine all candidate answers, posing a great challenge to the generalization on uns…

2024

Extending Context Window of Large Language Models from a Distributional Perspective

EMNLP 2024main

Scaling the rotary position embedding (RoPE) has become a common method for extending the context window of RoPE-based large language models (LLMs). However, existing scaling methods often rely on empirical approaches and lack a profound understanding of the internal distribution within RoPE, result…

2024

GlobeSumm: A Challenging Benchmark Towards Unifying Multi-lingual, Cross-lingual and Multi-document News Summarization

EMNLP 2024main

News summarization in today’s global scene can be daunting with its flood of multilingual content and varied viewpoints from different sources. However, current studies often neglect such real-world scenarios as they tend to focus solely on either single-language or single-document tasks. To bridge…

2024

Gradient Consistency-based Parameter Allocation for Multilingual Neural Machine Translation

COLING 2024main

Multilingual neural machine translation handles the translation of multiple languages with one unified model. However, this joint-training paradigm incurs the notorious issue of parameter interference, where the model compromises with the language diversity to find a common solution. Recent research…

2024

Investigating and Mitigating the Multimodal Hallucination Snowballing in Large Vision-Language Models

ACL 2024long

Though advanced in understanding visual information with human languages, Large Vision-Language Models (LVLMs) still suffer from multimodal hallucinations. A natural concern is that during multimodal interaction, the generated hallucinations could influence the LVLMs’ subsequent generation. Thus, we…

2024

Learning Fine-Grained Grounded Citations for Attributed Large Language Models

ACL 2024findings

Despite the impressive performance on information-seeking tasks, large language models (LLMs) still struggle with hallucinations. Attributed LLMs, which augment generated text with in-line citations, demonstrate potential in mitigating hallucinations and improving verifiability. However, current app…

2024

Length Extrapolation of Transformers: A Survey from the Perspective of Positional Encoding

EMNLP 2024finding

Built upon the Transformer, large language models (LLMs) have captured worldwide attention due to their remarkable abilities. Nevertheless, all Transformer-based models including LLMs suffer from a preset length limit and can hardly generalize from short training sequences to longer inference ones,…

Cited by 21SourcePDFScholar
2024

Retrieval-Generation Synergy Augmented Large Language Models

ICASSP 2024accepted

Large language models augmented with task-relevant documents have demonstrated impressive performance on knowledge-intensive tasks. However, regarding how to obtain effective documents, the existing methods are mainly divided into two categories. One is to retrieve from an external knowledge base, a…

Cited by 0SourceScholar
2024

SkillNet-X: A Multilingual Multitask Model with Sparsely Activated Skills

ICASSP 2024accepted

Traditional multitask learning methods typically can only leverage shared knowledge within specific tasks or languages, resulting in a loss of either cross-language or cross-task knowledge. This paper proposes a general multilingual multitask model, named SkillNet-X, which enables a single model to…

Cited by 0SourceScholar
2023

Controllable Text Generation via Probability Density Estimation in the Latent Space

ACL 2023long

Previous work on controllable text generation has explored the idea of control from the latent space, such as optimizing a representation with attribute-specific classifiers or sampling one from relevant discrete samples. However, they cannot effectively model a complex space with diverse attributes…

2023

Dialogue Context Modelling for Action Item Detection: Solution for ICASSP 2023 Mug Challenge Track 5

ICASSP 2023accepted

Action item detection aims at recognizing sentences containing information about actionable tasks, which can help people quickly grasp core tasks in the meeting without going through the redundant meeting contents. Therefore, in this paper, we thoroughly describe our carefully designed solution for…

Cited by 0SourceScholar
2023

Enabling Unsupervised Neural Machine Translation with Word-level Visual Representations

EMNLP 2023long findings

Unsupervised neural machine translation has recently made remarkable strides, achieving impressive results with the exclusive use of monolingual corpora. Nonetheless, these methods still exhibit fundamental flaws, such as confusing similar words. A straightforward remedy to rectify this drawback is…

Cited by 0SourceScholar
2023

Hierarchical Catalogue Generation for Literature Review: A Benchmark

EMNLP 2023long findings

Scientific literature review generation aims to extract and organize important information from an abundant collection of reference papers and produces corresponding reviews while lacking a clear and logical hierarchy. We observe that a high-quality catalogue-guided generation process can effectivel…

Cited by 0SourcecodeScholar
2023

Improved Visual Story Generation with Adaptive Context Modeling

ACL 2023findings

Diffusion models developed on top of powerful text-to-image generation models like Stable Diffusion achieve remarkable success in visual story generation. However, the best-performing approach considers historically generated results as flattened memory cells, ignoring the fact that not all precedin…

2023

STOA-VLP: Spatial-Temporal Modeling of Object and Action for Video-Language Pre-training

AAAI 2023technical

Although large-scale video-language pre-training models, which usually build a global alignment between the video and the text, have achieved remarkable progress on various downstream tasks, the idea of adopting fine-grained information during the pre-training stage is not well explored. In this wor…

Cited by 8SourcePDFScholar
2023

Towards Higher Pareto Frontier in Multilingual Machine Translation

ACL 2023long

Multilingual neural machine translation has witnessed remarkable progress in recent years. However, the long-tailed distribution of multilingual corpora poses a challenge of Pareto optimization, i.e., optimizing for some languages may come at the cost of degrading the performance of others. Existing…

2022

A Distributional Lens for Multi-Aspect Controllable Text Generation

EMNLP 2022main

Multi-aspect controllable text generation is a more challenging and practical task than single-aspect control. Existing methods achieve complex multi-aspect control by fusing multiple controllers learned from single-aspect, but suffer from attribute degeneration caused by the mutual interference of…

2022

Improving Controllable Text Generation with Position-Aware Weighted Decoding

ACL 2022findings

Weighted decoding methods composed of the pretrained language model (LM) and the controller have achieved promising results for controllable text generation. However, these models often suffer from a control strength/fluency trade-off problem as higher control strength is more likely to generate inc…

2022

Unifying the Convergences in Multilingual Neural Machine Translation

EMNLP 2022main

Although all-in-one-model multilingual neural machine translation (MNMT) has achieved remarkable progress, the convergence inconsistency in the joint training is ignored, i.e., different language pairs reaching convergence in different epochs. This leads to the trained MNMT model over-fitting low-re…

2021

Dialogue Discourse-Aware Graph Model and Data Augmentation for Meeting Summarization

IJCAI 2021poster

Meeting summarization is a challenging task due to its dynamic interaction nature among multiple speakers and lack of sufficient training data. Existing methods view the meeting as a linear sequence of utterances while ignoring the diverse relations between each utterance. Besides, the limited label…

2021

Language Model as an Annotator: Exploring DialoGPT for Dialogue Summarization

ACL 2021long

Current dialogue summarization systems usually encode the text with a number of general semantic features (e.g., keywords and topics) to gain more powerful dialogue modeling capabilities. However, these features are obtained via open-domain toolkits that are dialog-agnostic or heavily relied on huma…

2021

Learning to Rewrite for Non-Autoregressive Neural Machine Translation

EMNLP 2021main

Non-autoregressive neural machine translation, which decomposes the dependence on previous target tokens from the inputs of the decoder, has achieved impressive inference speedup but at the cost of inferior accuracy. Previous works employ iterative decoding to improve the translation by applying mul…

2020

TableGPT: Few-shot Table-to-Text Generation with Table Structure Reconstruction and Content Matching

COLING 2020main

Although neural table-to-text models have achieved remarkable progress with the help of large-scale datasets, they suffer insufficient learning problem with limited training data. Recently, pre-trained language models show potential in few-shot learning with linguistic knowledge learnt from pretrain…