Papers by Yuanxin Ouyang
Similarity Based Auxiliary Classifier for Named Entity Recognition (D19-1)
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| Challenge: | Named entity recognition (NER) tasks are a fundamental challenge for name recognition tasks that aim to reduce the boundary error when entities become longer. |
| Approach: | They propose a similarity based auxiliary classifier which can distinguish entity words from non-entity words by using vectors to indicate tags. |
| Outcome: | Empirical results show that the proposed classifier can perform better than baseline approaches. |
PunchBench: Benchmarking MLLMs in Multimodal Punchline Comprehension (2025.acl-long)
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| Challenge: | Existing benchmarks on punchline comprehension suffer from language shortcuts that allow models to rely on text, lack of question diversity, and narrow focus on a specific domain of multimodal content. |
| Approach: | They propose a multimodal punchline comprehension benchmark to assess models' ability to comprehend punchlines. |
| Outcome: | The proposed model surpasses in-context learning and chain-of-thought in punchline comprehension. |
Token-Level Self-Evolution Training for Sequence-to-Sequence Learning (2023.acl-short)
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| Challenge: | Adaptive training approaches do not consider the variation of learning difficulty in different training steps, making the learning deterministic and sub-optimal. |
| Approach: | They propose a dynamic token-level self-evolution training method that reweighs the training losses of different target tokens based on priors. |
| Outcome: | Empirically, the proposed method yields significant improvements on three translation tasks. |
Enhancing Input-Label Mapping in In-Context Learning with Contrastive Decoding (2025.acl-short)
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| Challenge: | Prior research has found that large language models overlook input-label mapping information in ICL, relying more on their pre-trained knowledge. |
| Approach: | They propose a novel method that contrasts input-label mappings between positive and negative in-context examples to improve model performance. |
| Outcome: | The proposed method improves performance on 7 natural language understanding tasks without additional training. |
Revisiting Demonstration Selection Strategies in In-Context Learning (2024.acl-long)
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| Challenge: | Large language models (LLMs) have shown an impressive ability to perform a wide range of tasks using in-context learning (ICL). |
| Approach: | They propose a data- and model-dependent method to select models using in-context learning, TopK + ConE, and propose unified explanations for the effectiveness of previous methods. |
| Outcome: | The proposed method improves language understanding and generation tasks with different model scales. |
ProCQA: A Large-scale Community-based Programming Question Answering Dataset for Code Search (2024.lrec-main)
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| Challenge: | Existing approaches to code question answering use bi-modal and unimodal pretraining to align text and code representations. |
| Approach: | They propose a modality-agnostic contrastive pre-training approach to improve alignment of text and code representations of current code language models. |
| Outcome: | The proposed model exhibits significant performance improvements across a wide range of code retrieval benchmarks. |
Towards Making the Most of ChatGPT for Machine Translation (2023.findings-emnlp)
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| Challenge: | Prior studies have shown that ChatGPT achieves comparable results to commercial systems for high-resource languages, but lags behind in complex tasks, e.g., low-resourced and distant-language-pairs translation. |
| Approach: | They propose task-specific prompts and domain-specific prompts which are based on task information and domain information and a task-specific prompt. |
| Outcome: | The proposed prompts improve the performance of ChatGPT in complex tasks and generate hallucinations for non-English-centric tasks. |