Papers by Haibin Chen

15 papers
Hierarchy-aware Label Semantics Matching Network for Hierarchical Text Classification (2021.acl-long)

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Challenge: Existing methods ignore the semantic relationship between text and labels, so they cannot make full use of hierarchical information.
Approach: They propose a hierarchy-aware label semantics matching network to model the semantic relationship between text and labels in a semantic matching problem.
Outcome: The proposed model captures the text-label semantics matching relationship among coarse-grained labels and fine-grain labels in a hierarchy-aware manner.
Codec-SUPERB: An In-Depth Analysis of Sound Codec Models (2024.findings-acl)

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Challenge: Researchers have developed a sound codec that can be used as tokenizers for preserving audio data and minimizing data transmission latency.
Approach: They propose to use codec-SUPERB to assess codec models across representative sound applications and signal-level metrics rooted in sound domain knowledge.
Outcome: The proposed codec-SUPERB model is evaluated on selected experimental settings.
Attention-Enhancing Backdoor Attacks Against BERT-based Models (2023.findings-emnlp)

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Challenge: Existing textual backdoor attacks focus on generating stealthy triggers or modifying model weights.
Approach: They propose a Trojan Attention Loss (TAL) which enhances the Trojan behavior by directly manipulating attention patterns.
Outcome: The proposed method improves the effectiveness of the backdoor attacks on different backbone models and tasks.
SELECting over Tokens: Curating Pre-training Data at Scale via Token Classification (2026.acl-long)

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Challenge: Existing pipelines rely on expert-crafted heuristic rules, which lack content-aware, fine-grained noise detection.
Approach: They propose a framework that reframes data refinement as a highly efficient token classification task.
Outcome: The proposed framework outperforms existing pipelines on benchmarks and is 2.5x faster at inference.
Read As Human: Compressing Context via Parallelizable Close Reading and Skimming (2026.acl-long)

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Challenge: Existing task-aware methods require loading the entire input sequence at once for compression, which suffer from computational inefficiency.
Approach: They propose a framework that adopts an adaptive hybrid reading strategy to reduce computational inefficiency and redundant information in long-context scenarios.
Outcome: Experiments show that RAM outperforms baselines on multiple question answering and summarization benchmarks while delivering up to a 12x speedup on long inputs.
Aligning Paralinguistic Understanding and Generation in Speech LLMs via Multi-Task Reinforcement Learning (2026.eacl-industry)

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Challenge: Using paralinguistic cues is challenging for speech large language models, authors say . limited training data, annotation difficulty, and models exploiting lexical shortcuts are challenges . a recent study shows that modeling paralinguistic reasoning with multitask RL improves paralinguistics understanding .
Approach: They propose multi-task reinforcement learning with chain-of-thought prompting that elicits explicit affective reasoning.
Outcome: The proposed model improves paralinguistics understanding over baselines and strong proprietary models by 8-12% on Expresso, IEMOCAP, and RAVDESS.
How to inject knowledge efficiently? Knowledge Infusion Scaling Law for Pre-training Large Language Models (2025.emnlp-main)

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Challenge: Recent studies show that strategically infusing domain knowledge during pretraining can substantially improve downstream performance.
Approach: They propose a knowledge infusion scaling law that predicts the optimal amount of domain knowledge to inject into large LLMs by analyzing their smaller counterparts.
Outcome: The proposed model predicts the optimal amount of domain knowledge to inject into large LLMs by analyzing their smaller counterparts.
Joint Constrained Learning with Boundary-adjusting for Emotion-Cause Pair Extraction (2023.acl-long)

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Challenge: Emotion-Cause Pair Extraction (ECPE) aims to identify the document’s emotion clauses and corresponding cause clauses.
Approach: They propose a constrained learning framework with boundary-adjusting for Emotion-Cause Pair Extraction that summarizes prior rules and forces the model to take them into consideration in optimization.
Outcome: The proposed framework achieves competitive results compared with state-of-the-art methods on unbalanced data and proves robustness on unbalancing data.
Cross-domain Named Entity Recognition via Graph Matching (2022.findings-acl)

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Challenge: Empirical results show that our method outperforms a series of transfer learning, multitask learning, and few-shot learning methods due to the data scarcity in the real-world scenario.
Approach: They propose to model the label relationship as a probability distribution and construct label graphs in both source and target label spaces.
Outcome: Empirical results show that the proposed method outperforms transfer learning, multi-task learning, and few-shot learning methods on four datasets.
Distilling Causal Effect from Miscellaneous Other-Class for Continual Named Entity Recognition (2022.emnlp-main)

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Challenge: Existing methods for Named Entity Recognition (NER) are not able to learn Other-Class in the same way as new entity types.
Approach: They propose a unified causal framework to retrieve causality from new entity types and Other-Class.
Outcome: The proposed method outperforms the state-of-the-art method on three benchmark datasets.
Task-Agnostic Detector for Insertion-Based Backdoor Attacks (2024.findings-naacl)

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Challenge: Existing methods for textual backdoor detection are task-specific and less effective beyond sentence classification.
Approach: They propose a task-agnostic method for backdoor detection that leverages final layer logits and an efficient pooling technique.
Outcome: TABDet can jointly learn from diverse task-specific models, demonstrating superior detection efficacy over traditional methods.
Preserving Commonsense Knowledge from Pre-trained Language Models via Causal Inference (2023.acl-long)

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Challenge: Existing studies attribute catastrophic forgetting to fine-tuning, and they retain pre-trained knowledge indiscriminately without identifying what knowledge is transferable.
Approach: They propose a unified objective for fine-tuning to retrieve the causality back from pre-trained data and use it to mitigate negative transfer while preserving knowledge.
Outcome: The proposed method outperforms state-of-the-art fine-tuning methods on commonsense QA datasets and can be implemented as a plug-in module to inflate the performance of existing QA models.
CoMeT: Collaborative Memory Transformer for Efficient Long Context Modeling (2026.acl-long)

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Challenge: a novel architecture that enables LLMs to handle arbitrarily long sequences with constant memory usage and linear time complexity is a major barrier to long-context processing.
Approach: They propose a novel architecture that enables LLMs to handle arbitrarily long sequences with constant memory usage and linear time complexity.
Outcome: The proposed architecture can handle arbitrarily long sequences with constant memory usage and linear time complexity.
PretrainRL: Alleviating Factuality Hallucination of Large Language Models at the Beginning (2026.findings-acl)

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Challenge: Large language models suffer from factual hallucinations where they generate verifiable falsehoods.
Approach: They propose a framework that integrates reinforcement learning into the pretraining phase to consolidate factual knowledge.
Outcome: The proposed framework significantly alleviates factual hallucinations and outperforms state-of-the-art methods.
ConceptMath: A Bilingual Concept-wise Benchmark for Measuring Mathematical Reasoning of Large Language Models (2024.findings-acl)

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Challenge: ConceptMath evaluates concept-wise mathematical reasoning of Large Language Models (LLMs) Existing benchmarks that evaluate general mathematical reasoning with an average accuracy fail to probe the fine-grained failure modes of mathematical reasoning on specific datasets.
Approach: They introduce a bilingual, fine-grained benchmark that evaluates concept-wise mathematical reasoning of Large Language Models.
Outcome: The proposed benchmarks evaluate concept-wise mathematical reasoning of Large Language Models with concept-based accuracies.

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