Papers by Chong Wang

46 papers
UniCodec: Unified Audio Codec with Single Domain-Adaptive Codebook (2025.acl-long)

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Challenge: Existing neural audio codecs are not capable of handling multi-domain audio data . et al., 2023) integrate speech modality with text-based large language models .
Approach: They propose a unified audio codec with a single codebook to support multi-domain audio data . they propose combining a mix-of-experts strategy and a partitioned domain-adaptive codebook method .
Outcome: The proposed codec outperforms existing codecs on acoustic and semantic representation capabilities.
Multimodal Fusion and Coherence Modeling for Video Topic Segmentation (2025.findings-acl)

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Challenge: Traditional video topic segmentation methods struggle to discern topical transitions . supervised approaches have improved performance on video action or scene segmentation .
Approach: They propose a new task for video topic segmentation that enhances multimodality alignment and fusion by exploring different architectures using Cross-Attention and Mixture of Experts.
Outcome: The proposed model improves on educational videos, in the form of lectures . it combines cross-attention and mixture of experts to strengthen multimodality alignment and fusion .
We-Math: Does Your Large Multimodal Model Achieve Human-like Mathematical Reasoning? (2025.acl-long)

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Challenge: Existing benchmarks focus more on end-to-end performance, but neglect the underlying principles of knowledge acquisition and generalization.
Approach: They propose a benchmark specifically designed to explore the problem-solving principles by decomposing 6.5K visual math problems into 10.9K step-level questions for evaluation.
Outcome: The proposed benchmark covers 6.5K visual math problems and 10.9K step-level questions spanning 5 layers of knowledge granularity and 67 hierarchical knowledge concepts.
RealSec-bench: A Benchmark for Evaluating Secure Code Generation in Real-World Repositories (2026.findings-acl)

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Challenge: Existing benchmarks for large language models fail to capture complex interplay between functionality and security.
Approach: They propose a benchmark for secure code generation constructed from real-world, high-risk Java repositories.
Outcome: The proposed benchmarks highlight the gap between functional and secure code generation in LLMs.
Improving Long Document Topic Segmentation Models With Enhanced Coherence Modeling (2023.emnlp-main)

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Challenge: Recent supervised neural models have greatly promoted the development of topic segmentation, but the deeper relationship between coherence and topic segmenting is underexplored.
Approach: They propose to use topic-aware Sentence Structure Prediction and Contrastive Semantic Similarity Learning to capture coherence from logical structure and semantic similarity perspectives to further improve topic segmentation performance.
Outcome: The proposed approach outperforms state-of-the-art methods on WIKI-727K and achieves an average relative reduction of 4.3% on Pk on WikiSection.
Taming System Complexity: Demystifying Software Engineering Agents in Diagnosing Linux Kernel Faults (2026.acl-long)

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Challenge: Existing LLM agents struggle with identifying bugs in the Linux kernel . bugs can affect billions of users, affecting the Linux Foundation's research on the topic .
Approach: They propose a LinuxFLBench benchmark to measure the accuracy of LLM agents on the Linux kernel.
Outcome: The proposed framework improves FL accuracy with minimal costs.
S+PAGE: A Speaker and Position-Aware Graph Neural Network Model for Emotion Recognition in Conversation (2022.aacl-main)

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Challenge: Emotion recognition in conversation (ERC) is a task arousing increasing interest in many fields.
Approach: They propose a novel GNN-based ERC model that captures speaker and position information.
Outcome: The proposed model captures speaker and position-aware conversation structure information.
MDERank: A Masked Document Embedding Rank Approach for Unsupervised Keyphrase Extraction (2022.findings-acl)

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Challenge: Keyphrase extraction (KPE) extracts phrases in a document that provide a concise summary of the core content.
Approach: They propose an unsupervised keyphrase extraction method that ranks candidates by similarity between embeddings of source document and masked document.
Outcome: The proposed method outperforms state-of-the-art methods on six benchmarks . it achieves average 3.53 improvement over the existing method .
MCTS: A Multi-Reference Chinese Text Simplification Dataset (2024.lrec-main)

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Challenge: Existing studies on text simplification systems have focused on unsupervised methods due to the limited evaluation data in language and domain.
Approach: They propose a Chinese text simplification dataset that provides a detailed analysis and an annotation process.
Outcome: The proposed dataset evaluates the performance of unsupervised methods and advanced large language models.
Enhancing Hyperbole and Metaphor Detection with Their Bidirectional Dynamic Interaction and Emotion Knowledge (2025.acl-long)

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Challenge: Existing methods for hyperbole and metaphor detection focus on superficial text features, ignoring the associations of hyperbola and metaphor . Existing frameworks focus on identifying superficial text, focusing on superficial features .
Approach: They propose an emotion-guided hyperbole and metaphor detection framework based on bidirectional dynamic interaction.
Outcome: The proposed framework outperforms baseline methods on four datasets.
X-Instruction: Aligning Language Model in Low-resource Languages with Self-curated Cross-lingual Instructions (2024.findings-acl)

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Challenge: Large language models respond well in high-resource languages but struggle in low-resourced languages.
Approach: They propose a method to construct cross-lingual instruction following samples with instruction in English and response in low-resource languages.
Outcome: The proposed method builds a large-scale cross-lingual instruction tuning dataset on 10 languages.
DALR: Dual-level Alignment Learning for Multimodal Sentence Representation Learning (2025.findings-acl)

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Challenge: Existing multimodal sentence representation learning methods focus on aligning images and text at a coarse level, resulting in cross-modal misalignment bias and intra-modal semantic divergence.
Approach: They propose a dual-level alignment learning framework for multimodal sentence representation learning that promotes cross-modal and intra-modal alignment.
Outcome: The proposed framework outperforms state-of-the-art methods on semantic textual similarity and transfer tasks on semantic similarity, ranking distillation and global intra-modal alignment learning.
GALA: Geometric Data Selection with Strategic Prospecting for Large Language Model Self-training (2026.findings-acl)

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Challenge: Existing approaches to self-training are based on reject sampling and lack quality reasoning paths.
Approach: They propose a framework for self-training using a generate-and-filter paradigm . they propose to identify diverse and informative samples from redundant data and exploit them more strategically.
Outcome: The proposed framework exploits informative samples from redundant data and improves reasoning trajectory prospecting.
Benchmarking LLMs and LLM-based Agents in Practical Vulnerability Detection for Code Repositories (2025.acl-long)

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Challenge: Large Language Models (LLMs) have shown promise in software vulnerability detection, especially on function-level benchmarks like Devign and BigVul.
Approach: They propose a JIT vulnerability detection benchmark linking each function to its vulnerability-introducing and fixing commits.
Outcome: The proposed JIT vulnerability detection benchmark enables comprehensive evaluation of detection capabilities.
RAAMove: A Corpus for Analyzing Moves in Research Article Abstracts (2024.lrec-main)

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Challenge: RAAMove is a comprehensive multi-domain corpus dedicated to the annotation of move structures in Research Article (RA) abstracts.
Approach: They propose a multi-domain corpus dedicated to the annotation of move structures in RA abstracts.
Outcome: The proposed corpus is based on a human-annotated dataset and a BERT-based model to verify its effectiveness.
Discovering Semantic Subdimensions through Disentangled Conceptual Representations (2025.findings-emnlp)

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Challenge: Existing approaches focus on predefined dimensions that overlook finer conceptual distinctions . a new framework is proposed to investigate the subdimensions underlying coarse-grained semantic dimensions .
Approach: They propose a framework that decomposes word embeddings into multiple sub-embeddings . they propose to map these subdimensions to brain activation to assess their plausibility .
Outcome: The proposed framework decomposes word embeddings from large language models into sub-embeddings, each encoding specific semantic information.
From Observation to Understanding: Front-Door Adjustments with Uncertainty Calibration for Enhancing Egocentric Reasoning in LVLMs (2025.findings-acl)

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Challenge: Existing methods that adapt LVLMs to egocentric tasks overlook critical agent-environment interactions, limiting their ability to perform egoic reasoning.
Approach: They propose a zero-shot paradigm to enhance egocentric reasoning by simulating human causal reasoning by formalizing ego-centric reasoning using a structural causal model.
Outcome: The proposed method improves egocentric reasoning abilities on six tasks.
LitVISTA: A Benchmark for Narrative Orchestration in Literary Text (2026.acl-long)

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Challenge: Existing large language models focus on causal coherence, neglecting the complex story arcs and orchestration inherent in human narratives.
Approach: They propose a high-dimensional framework for narrative orchestration that unifies human and model perspectives while jointly characterizing narrative function and structure in a common space.
Outcome: The proposed framework unifies human and model perspectives while jointly characterizing narrative function and structure in a common space.
Cross-Document Cross-Lingual NLI via RST-Enhanced Graph Fusion and Interpretability Prediction (2025.emnlp-main)

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Challenge: Despite the development of many subdirections, Cross-Document Cross-Lingual NLI remains largely unexplored.
Approach: They propose a novel paradigm that extends traditional NLI capabilities to multi-document, multilingual scenarios by integrating RST-enhanced graph fusion with interpretability-aware prediction.
Outcome: The proposed method improves on existing models and document-level NLI to multi-document, multilingual scenarios.
OmniFlatten: An End-to-end GPT Model for Seamless Voice Conversation (2025.acl-long)

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Challenge: Full-duplex spoken dialogue systems allow simultaneous bidirectional communication . low latency and natural interactions in full-duplice systems remains a challenge .
Approach: They propose a multi-stage post-training scheme that adapts a text large language model into a speech-text dialogue LLM.
Outcome: The proposed model can model human conversation behaviors with low latency and natural interactions with low delay.
Improving the Robustness of Large Language Models via Consistency Alignment (2024.lrec-main)

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Challenge: Large language models have shown tremendous success in following user instructions and generating helpful responses, but their robustness is still far from optimal.
Approach: They propose a two-stage training framework that helps a model generalize on following instructions via similar instruction augmentations.
Outcome: The proposed training framework improves diversity and aligns the model with human expectations by differentiating subtle differences in similar responses.
Integrating Audio, Visual, and Semantic Information for Enhanced Multimodal Speaker Diarization on Multi-party Conversation (2025.acl-long)

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Challenge: Mainstream speaker diarization systems rely only on acoustic information, making it challenging in complex aural environments.
Approach: They propose a multimodal approach that integrates audio, visual, and semantic cues to enhance speaker diarization.
Outcome: The proposed approach outperforms state-of-the-art methods on multi-party conversations . it integrates audio-visual-semantic cues into the clustering process for acoustic speaker embeddings .
AutoSearch: Adaptive Search Depth for Efficient Agentic RAG via Reinforcement Learning (2026.findings-acl)

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Challenge: Prior work limits search depth to reduce cost, but this often leads to underexploration of complex questions.
Approach: They propose a reinforcement learning framework that evaluates each search step via self-generated intermediate answers.
Outcome: Extensive experiments on multiple benchmarks show that AutoSearch achieves a superior accuracy-efficiency trade-off, alleviating over-searching while preserving search quality.
GenesisFunc: Multi-Agent Data Generation for Accurate and Generalizable Function-Calling (2026.acl-long)

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Challenge: Large Language Models (LLMs) extend their capabilities through function-calling (FC) however, obtaining and annotating real function-called data is challenging, and synthetic data from existing pipelines suffers from unreliable APIs, limited tool scalability, insufficient diversity, and weak quality control.
Approach: They propose a pipeline for generating FC training data using reliable tools and a multi-agent framework that supports a dialogue generation system that produces conversations spanning diverse scenarios.
Outcome: The proposed pipeline outperforms open-source models in in-domain FC performance and out-of-domain generalization while reaching FC capabilities comparable to some of the latest API-based models.
Interpreting and Exploiting Functional Specialization in Multi-Head Attention under Multi-task Learning (2023.emnlp-main)

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Challenge: Experimental results show that multi-head attention module evolves functional specialization after multi-task training.
Approach: They propose a method to quantify the degree of functional specialization in multi-head attention . they propose 'multi-task training' method to increase functional specialisation and mitigate negative information transfer .
Outcome: The proposed method increases functional specialization and mitigates negative information transfer in multi-task learning without adding any parameters.
LEAF: Large Language Diffusion Model for Time Series Forecasting (2025.findings-emnlp)

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Challenge: Recent work has applied large language models (LLMs) into time series forecasting, but they lack an understanding of holistic temporal patterns with potential error accumulation.
Approach: They propose a framework that marries Larg e Langu age Diffusion Model with time series forecasting (LEAF) they propose converting time series into tokens and adopting language diffusion models to capture temporal dependencies.
Outcome: The proposed framework generates future predictions with a diffusion model from a holistic view.
Knowing What LLMs DO NOT Know: A Simple Yet Effective Self-Detection Method (2024.naacl-long)

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Challenge: Recent literature reveals that Large Language Models (LLMs) hallucinate intermittently, which impedes their reliability for further utilization.
Approach: They propose a self-detection method to detect which questions an LLM does not know by combining the two components to identify whether the model generates a non-factual response to the question.
Outcome: The proposed method can detect which questions an LLM does not know across factoid question-answering, arithmetic reasoning, and commonsense reasoning tasks.
Ditto: A Simple and Efficient Approach to Improve Sentence Embeddings (2023.emnlp-main)

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Challenge: Prior studies diagnose the anisotropy problem in sentence embeddings from pre-trained language models without fine-tuning.
Approach: They propose an unsupervised method that weights words with model-based importance estimations and computes the weighted average of word representations from pre-trained models as sentence embeddings.
Outcome: Empirical evaluations show that the proposed method can alleviate the anisotropy problem and improve various pre-trained models on the STS benchmarks.
Improving In-context Learning of Multilingual Generative Language Models with Cross-lingual Alignment (2024.naacl-long)

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Challenge: Existing studies show that multilingual generative models exhibit a strong language bias toward high-resource languages.
Approach: They propose a cross-lingual alignment framework exploiting pairs of translation sentences to improve cross-linguistic abilities.
Outcome: The proposed framework improves cross-lingual abilities and mitigates performance gap.
Subgoal Discovery for Hierarchical Dialogue Policy Learning (D18-1)

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Challenge: Existing methods to develop dialogue agents for complex tasks require sparse reward signals.
Approach: They propose a divide-and-conquer approach that exploits the hidden structure of a task . they use subgoals to divide a goal-oriented task into simpler subgoal sets .
Outcome: The proposed approach performs competitively against state-of-the-art methods that require human-defined subgoals.
V-Oracle: Making Progressive Reasoning in Deciphering Oracle Bones for You and Me (2025.acl-long)

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Challenge: Deciphering oracle bone scripts using AI technology is not an overnight task due to the evolution of written language over millennia.
Approach: They propose a framework that utilizes Large Multi-modal Models (LMMs) for interpreting Oracle Bone Script (OBS).
Outcome: The proposed framework provides quantitative analyses and superior deciphering capability.
Native Sparse Attention: Hardware-Aligned and Natively Trainable Sparse Attention (2025.acl-long)

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Challenge: Long-context modeling is crucial for next-generation language models, but high computational cost of standard attention mechanisms poses significant computational challenges.
Approach: They propose a natively trained Sparse Attention mechanism that integrates algorithms with hardware-aligned optimizations to achieve efficient long-context modeling.
Outcome: The proposed model maintains or exceeds Full Attention models across general benchmarks, long-context tasks, and instruction-based reasoning.
Decoding the Multimodal Mind: Generalizable Brain-to-Text Translation via Multimodal Alignment and Adaptive Routing (2026.findings-acl)

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Challenge: Current approaches to decoding language from the human brain rely on unimodal representations, neglecting the brain’s inherently multimodal processing.
Approach: They propose a framework that leverages Multimodal Large Language Models to align brain signals with a shared semantic space encompassing text, images, and audio.
Outcome: The proposed framework achieves an 8.48% improvement on the most commonly used benchmark on fMRI datasets with textual, visual, and auditory stimuli.
DiQAD: A Benchmark Dataset for Open-domain Dialogue Quality Assessment (2023.findings-emnlp)

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Challenge: Existing studies on dialogue quality assessment are uncapable of providing an end-to-end and human-epistemic assessment dataset . open-domain dialogue assessment is complicated and costly, but it can be done by recruiting human evaluators.
Approach: They propose a large-scale dialogue quality assessment dataset for automatically assessing open-domain dialogue quality.
Outcome: The proposed dataset is openly accessible at https://github.com/yukunZhao/Dialogue_quality_evaluation.
Boosting Event Extraction with Denoised Structure-to-Text Augmentation (2023.findings-acl)

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Challenge: Existing methods for event extraction neglect grammatical incorrectness, structure misalignment, and semantic drifting . et al., 2004; Ahn, 2006) show that the proposed method generates more diverse text representations for event extracting compared with the state-of-the-art.
Approach: They propose a framework for event extraction that generates additional training data and iteratively selects the effective subset from the generated training data.
Outcome: The proposed method generates more diverse representations of training data and achieves comparable results with the state-of-the-art.
Refining and Synthesis: A Simple yet Effective Data Augmentation Framework for Cross-Domain Aspect-based Sentiment Analysis (2024.findings-acl)

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Challenge: Aspect-based Sentiment Analysis (ABSA) data augmentation has attracted increasing attention in recent years due to data sparsity.
Approach: They propose a framework to augment ABSA data using pseudo labels for target domain . they refine generated labeled data using a natural language inference filter .
Outcome: The proposed framework outperforms 7 strong baselines on 4 kinds of ABSA tasks.
DocFusion: A Unified Framework for Document Parsing Tasks (2025.findings-acl)

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Challenge: Existing methods for document parsing often employ multiple models, limiting performance . Existing models often employ discrete tokens, whereas recognition relies on continuous coordinates .
Approach: They propose a Gaussian-Kernel Cross-Entropy Loss (GK-CEL) that unifies detection and recognition by enabling generative frameworks to handle both tasks simultaneously.
Outcome: The proposed model performs competitively across four core document parsing tasks.
Multi-Domain Neural Machine Translation with Word-Level Adaptive Layer-wise Domain Mixing (2020.acl-main)

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Challenge: Existing multi-domain neural machine translation models lack adaptation to individual domains.
Approach: They propose a multi-domain neural machine translation model with individual modules for each domain . they use word-level, adaptive and layer-wise domain mixing to achieve this .
Outcome: The proposed model outperforms existing models in several NMT tasks.
QRMeM: Unleash the Length Limitation through Question then Reflection Memory Mechanism (2024.findings-emnlp)

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Challenge: Existing methods for processing large textual content face insufficient adaptation to task-specific needs and missing multi-segmentation relationships.
Approach: They propose a question then reflection memory mechanism which integrates a dual-structured memory pool and a structured graph guidance to facilitate a reflective trial-and-error approach for navigating and identifying relevant segments.
Outcome: The proposed model achieves superior performance on multiple-choice questions and multi-doc QA.
LLM×MapReduce: Simplified Long-Sequence Processing using Large Language Models (2025.acl-long)

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Challenge: Existing studies have focused on extending the context length of large language models (LLMs) due to their quadratic computational complexity and a lack of high-quality long training examples, most LLMs are trained with a limited window size.
Approach: They propose a training-free framework that enables large language models to effectively process long texts using a divide-and-conquer strategy for comprehensive document understanding.
Outcome: The proposed framework outperforms open-source and commercial long-context LLMs and is compatible with several models.
Multi-level Adaptive Contrastive Learning for Knowledge Internalization in Dialogue Generation (2023.emnlp-main)

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Challenge: Existing knowledge-grounded dialogue generation models struggle with dull and repetitive outputs, a problem commonly termed as text degeneration.
Approach: They propose a framework that allows the model to "cheat" the objective by duplicating knowledge segments in a superficial pattern matching based on overlap.
Outcome: The proposed framework can be applied to a WoW dataset and shows that it works across models and decoding strategies.
Bi-Tuning with Collaborative Information for Controllable LLM-based Sequential Recommendation (2025.acl-long)

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Challenge: Existing approaches to optimize sequential recommendation systems rely on item ID sequences, but they lack collaborative knowledge and limited controllability.
Approach: They propose a simple bi-tuning framework with collaborative information for controllable Large Language Model-based Sequential Recommendation (Laser) they incorporate learnable virtual tokens at prefix and suffix of input text to adapt LLMs with collaborative knowledge .
Outcome: The proposed framework outperforms state-of-the-art recommendations on real-world datasets.
What Factors Influence LLMs’ Judgments? A Case Study on Question Answering (2024.lrec-main)

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Challenge: Existing studies indicate that Large Language Models perform at a level comparable to humans with advantages of speed and cost-effectiveness in different fields.
Approach: They propose to introduce four unexplored factors and a new dimension of question difficulty to provide a more comprehensive understanding of LLMs’ judgments across varying question intricacies.
Outcome: The proposed dimensions of question difficulty and answer quantity provide valuable insights into optimizing LLMs’ performance as judges.
TextFlint: Unified Multilingual Robustness Evaluation Toolkit for Natural Language Processing (2021.acl-demo)

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Challenge: Existing approaches to textual robustness evaluation focus on slightly modifying the input data, which maintains the original meaning and results in a different prediction.
Approach: They propose a multilingual robustness evaluation toolkit for NLP that integrates universal text transformations, task-specific transformations and adversarial attack.
Outcome: The toolkit includes universal text transformation, task-specific transformation, adversarial attack, subpopulation, and their combinations to provide comprehensive robustness analyses.
Mitigating the Discrepancy Between Video and Text Temporal Sequences: A Time-Perception Enhanced Video Grounding method for LLM (2025.coling-main)

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Challenge: Existing video LLMs excel at capturing the overall description of a video but lack the ability to demonstrate an understanding of temporal dynamics and localized content within the video.
Approach: They propose a Time-Perception Enhanced Video Grounding via Boundary Perception and Temporal Reasoning to improve LLMs' understanding of video temporality.
Outcome: The proposed method improves on three datasets: ActivityNet, Charades, and DiDeMo (up to 11.2% improvement on R@0.3).
Efficient Universal Goal Hijacking with Semantics-guided Prompt Organization (2025.acl-long)

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Challenge: Existing methods for prompt injection have focused on optimizing the suffix, overlooking the role of the prompt.
Approach: They propose a method that incorporates an efficient optimization algorithm and two semantics-guided prompt organization strategies to optimize the suffix sequence for universal goal hijacking.
Outcome: The proposed method can generate a fixed suffix that can concatenate to arbitrary user prompts for universal goal hijacking.

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