Zhuo Li


2022

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Graph Enhanced Contrastive Learning for Radiology Findings Summarization
Jinpeng Hu | Zhuo Li | Zhihong Chen | Zhen Li | Xiang Wan | Tsung-Hui Chang
Proceedings of the 60th Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)

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 automatic impression generation has attracted substantial attention. With the encoder-decoder framework, most previous studies explore incorporating extra knowledge (e.g., static pre-defined clinical ontologies or extra background information). Yet, they encode such knowledge by a separate encoder to treat it as an extra input to their models, which is limited in leveraging their relations with the original findings. To address the limitation, we propose a unified framework for exploiting both extra knowledge and the original findings in an integrated way so that the critical information (i.e., key words and their relations) can be extracted in an appropriate way to facilitate impression generation. In detail, for each input findings, it is encoded by a text encoder and a graph is constructed through its entities and dependency tree. Then, a graph encoder (e.g., graph neural networks (GNNs)) is adopted to model relation information in the constructed graph. Finally, to emphasize the key words in the findings, contrastive learning is introduced to map positive samples (constructed by masking non-key words) closer and push apart negative ones (constructed by masking key words). The experimental results on two datasets, OpenI and MIMIC-CXR, confirm the effectiveness of our proposed method, where the state-of-the-art results are achieved.

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机器音译研究综述(Survey on Machine Transliteration)
Zhuo Li (李卓) | Zhijuan Wang (王志娟) | Xiaobing Zhao (赵小兵)
Proceedings of the 21st Chinese National Conference on Computational Linguistics

“机器音译是基于语音相似性自动将文本从一种语言转换为另一种语言的过程,它是机器翻译的一个子任务,侧重于语音信息的翻译。音译后可知道源单词在另一种语言中的发音,使不熟悉源语言的人更容易理解该语言,有益于消除语言和拼写障碍。机器音译在多语言文本处理、语料库对齐、信息抽取等自然语言应用中发挥着重要作用。本文阐述了目前机器音译任务中存在的挑战,对主要的音译方法进行了剖析、分类和整理,对音译数据集进行了罗列汇总,并列出了常用的音译效果评价指标,最后对该领域目前存在的问题进行了说明并对音译学的未来进行了展望。本文以期对进入该领域的新人提供快速的入门指南,或供其他研究者参考。”

2014

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Identifying Important Features for Graph Retrieval
Zhuo Li | Sandra Carberry | Hui Fang | Kathleen McCoy
Proceedings of COLING 2014, the 25th International Conference on Computational Linguistics: Technical Papers