基于阅读技巧识别和双通道融合机制的机器阅读理解方法

彭伟; 胡玥; 李运鹏; 谢玉强; 牛晨旭

doi:10.16383/j.aas.c220983

基于阅读技巧识别和双通道融合机制的机器阅读理解方法

doi: 10.16383/j.aas.c220983

彭伟^{1, 2,},
胡玥^{1, 3,},
李运鹏^{1, 3,},
谢玉强^{1, 3,},
牛晨旭^{1, 3,}

1.
中国科学院信息工程研究所北京 100085
2.
中关村实验室北京 100080
3.
中国科学院大学网络空间安全学院北京 100085

基金项目: 国家自然科学基金(62006222, U21B2009), 中国科学院战略性先导研究计划(XDC02030400)资助

详细信息

作者简介:
彭伟：中关村实验室助理研究员. 2023年获得中国科学院信息工程研究所博士学位. 主要研究方向为对话生成, 网络空间安全. E-mail: pengwei@iie.ac.cn

胡玥：中国科学院信息工程研究所研究员. 主要研究方向为自然语言处理, 人工智能. 本文通信作者. E-mail: huyue@iie.ac.cn

李运鹏：中国科学院信息工程研究所博士研究生. 2019年获得山东大学学士学位. 主要研究方向为自然语言处理. E-mail: liyunpeng@iie.ac.cn

谢玉强：2023年获得中国科学院大学博士学位. 主要研究方向为自然语言处理, 认知建模. E-mail: yuqiang.xie@kunlun-inc.com

牛晨旭：中国科学院信息工程研究所博士研究生. 2021年获得西安电子科技大学学士学位. 主要研究方向为自然语言处理. E-mail: niuchenxu@iie.ac.cn

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出版历程
- 收稿日期: 2022-12-20
- 网络出版日期: 2023-11-08
- 刊出日期: 2024-05-29

A Machine Reading Comprehension Approach Based on Reading Skill Recognition and Dual Channel Fusion Mechanism

PENG Wei^{1, 2
,},
HU Yue^{1, 3
,},
LI Yun-Peng^{1, 3
,},
XIE Yu-Qiang^{1, 3
,},
NIU Chen-Xu^{1, 3
,}

1.
Institute of Information Engineering, Chinese Academy of Sciences, Beijing 100085
2.
Zhongguancun Laboratory, Beijing 100080
3.
School of Cyber Security, University of Chinese Academy of Sciences, Beijing 100085

Funds: Supported by National Natural Science Foundation of China (62006222, U21B2009) and Strategic Priority Research Program of Chinese Academy of Science (XDC02030400)

More Information

Author Bio:
PENG Wei　Assistant professor at Zhongguancun Laboratory. He received his Ph.D. degree from Institute of Information Engineering, Chinese Academy of Sciences in 2023. His research interest covers dialog generation and cyber security

HU Yue　Professor at the Institute of Information Engineering, Chinese Academy of Sciences. Her research interest covers natural language processing and artificial intelligence. Corresponding author of this paper

LI Yun-Peng　Ph.D. candidate at the Institute of Information Engineering, Chinese Academy of Sciences. He received his bachelor degree from Shandong University in 2019. His main research interest is natural language processing

XIE Yu-Qiang　He received his Ph.D. degree from University of Chinese Academy of Sciences in 2023. His research interest covers natural language processing and cognitive modeling

NIU Chen-Xu　Ph.D. candidate at the Institute of Information Engineering, Chinese Academy of Sciences. She received her bachelor degree from Xidian University in 2021. Her main research interest is natural language processing

摘要

摘要: 机器阅读理解任务旨在要求系统对给定文章进行理解, 然后对给定问题进行回答. 先前的工作重点聚焦在问题和文章间的交互信息, 忽略了对问题进行更加细粒度的分析(如问题所考察的阅读技巧是什么?). 受先前研究的启发, 人类对于问题的理解是一个多维度的过程. 首先, 人类需要理解问题的上下文信息; 然后, 针对不同类型问题, 识别其需要使用的阅读技巧; 最后, 通过与文章交互回答出问题答案. 针对这些问题, 提出一种基于阅读技巧识别和双通道融合的机器阅读理解方法, 对问题进行更加细致的分析, 从而提高模型回答问题的准确性. 阅读技巧识别器通过对比学习的方法, 能够显式地捕获阅读技巧的语义信息. 双通道融合机制将问题与文章的交互信息和阅读技巧的语义信息进行深层次的融合, 从而达到辅助系统理解问题和文章的目的. 为了验证该模型的效果, 在FairytaleQA数据集上进行实验, 实验结果表明, 该方法实现了在机器阅读理解任务和阅读技巧识别任务上的最好效果.
- 机器阅读理解 /
- 阅读技巧识别 /
- 对比学习 /
- 双通道融合机制
Abstract: Machine reading comprehension task aims to require the system to understand a given passage and then answer a question. Previous researches focus on the interaction between questions and passages. However, they neglect to make a more granular analysis of the questions, e.g., what is the reading skill examined by the questions? Inspired by the previous reading comprehension literature, the understanding of questions is a multi-dimensional process where humans first need to understand the context semantics of the question, then identify the reading skills they need to use for different types of questions, and finally answer the question. In the end, we propose a machine reading comprehension method based on reading skill recognition and dual channel fusion mechanism to make a comprehensive analysis of questions, so as to improve the accuracy of the model in answering questions. Specifically, the reading skill recognizer can capture the semantic representations of reading skills through contrastive learning. The dual channel fusion mechanism deeply integrates the contextual information and the semantic representations of reading skills, so as to help the system understand the question and passage. To verify the effectivenesss of the model, we conduct experiments on the FairytaleQA dataset. The experimental results show that the proposed method achieves the state-of-the-art performance on machine reading comprehension task and reading skill recognition task.
- Machine reading comprehension /
- reading skill recognition /
- contrastive learning /
- dual channel fusion machanism

HTML全文

图 1 在FairytaleQA数据集中的一个例子

Fig. 1 An example in FairytaleQA dataset

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图 2 本文模型总体结构

Fig. 2 Overall structure of our model

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图 3 阅读技巧识别器结构

Fig. 3 Structure of the reading skill recognizer

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图 4 双通道融合机制结构图

Fig. 4 Structure of dual channel fusion machanism

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图 5 双通道融合机制的性能比较

Fig. 5 The performances comparison on the dual channel fusion mechanism

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图 6 3种不同融合机制的比较

Fig. 6 Comparison of the three different fusion mechanisms

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图 7 阅读技巧识别的可视化

Fig. 7 The visualization of the reading skill recognition

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表 1 FairytaleQA数据集的主要统计数据

Table 1 Core statistics of the FairytaleQA dataset

项目	均值	标准偏差	最小值	最大值
每个故事章节数	15.6	9.8	2	60
每个故事单词数	2305.4	1480.8	228	7577
每个章节单词数	147.7	60.0	12	447
每个故事问题数	41.7	29.1	5	161
每个章节问题数	2.9	2.4	0	18
每个问题单词数	10.5	3.2	3	27
每个答案单词数	7.2	5.8	1	70

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表 2 FairytaleQA数据集中验证集和测试集上的性能对比 (%)

Table 2 Performance comparison on the validation and the test set in FairytaleQA dataset (%)

模型名称	验证集						测试集
模型名称	B-1	B-2	B-3	B-4	ROUGE-L	METEOR	B-1	B-2	B-3	B-4	ROUGE-L	METEOR
轻量化模型
Seq2Seq	25.12	6.67	2.01	0.81	13.61	6.94	26.33	6.72	2.17	0.81	14.55	7.34
CAQA-LSTM	28.05	8.24	3.66	1.57	16.15	8.11	30.04	8.85	4.17	1.98	17.33	8.60
Transformer	21.87	4.94	1.53	0.59	10.32	6.01	21.72	5.21	1.74	0.67	10.27	6.22
预训练语言模型
DistilBERT	—	—	—	—	9.70	—	—	—	—	—	8.20	—
BERT	—	—	—	—	10.40	—	—	—	—	—	9.70	—
BART	19.13	7.92	3.42	2.14	12.25	6.51	21.05	8.93	3.90	2.52	12.66	6.70
微调模型
BART-Question-types	—	—	—	—	—	—	—	—	—	—	49.10	—
CAQA-BART	52.59	44.17	42.76	40.07	53.20	28.31	55.73	47.00	43.68	40.45	55.13	28.80
BART-NarrativeQA	45.34	39.17	36.33	34.10	47.39	24.65	48.13	41.50	38.26	36.97	49.16	26.93
BART-FairytaleQA$ \dagger $	51.74	43.30	41.23	38.29	53.88	27.09	54.04	45.98	42.08	39.46	53.64	27.45
BART-FairytaleQA ‡	51.28	43.96	41.51	39.05	54.11	26.86	54.82	46.37	43.02	39.71	54.44	27.82
本文模型	54.21	47.38	44.65	43.02	58.99	29.70	57.36	49.55	46.23	42.91	58.48	30.93
人类表现	—	—	—	—	65.10	—	—	—	—	—	64.40	—

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表 3 FairytaleQA数据集中验证集和测试集上的各组件消融实验结果 (%)

Table 3 The performance of ablation study on each component in our model on the validation set and the test set of the FairytaleQA dataset (%)

模型设置	验证集						测试集
模型设置	B-1	B-2	B-3	B-4	ROUGE-L	METEOR	B-1	B-2	B-3	B-4	ROUGE-L	METEOR
SOTA 模型	51.28	43.96	41.51	39.05	54.11	26.86	54.82	46.37	43.02	39.71	54.44	27.82
去除阅读技巧识别器	52.15	44.47	42.11	40.73	55.38	27.45	54.90	47.16	43.55	40.67	56.48	29.31
去除对比学习损失	53.20	45.07	42.88	41.94	56.75	28.15	55.22	47.98	44.13	41.42	57.34	30.20
去除双通道融合机制	52.58	45.38	43.15	41.62	57.22	27.75	55.79	48.20	44.96	41.28	57.12	29.88
本文模型	54.21	47.38	44.65	43.02	58.99	29.70	57.36	49.55	46.23	42.91	58.48	30.93

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表 4 基于交叉熵损失的方法和基于有监督对比学习的方法在2个任务上的效果 (%)

Table 4 The performance of cross-entropy-loss-based method and supervised contrastive learning method on the two tasks (%)

实验设置	准确率	B-4	ROUGE-L	METEOR
基于交叉熵损失的方法	91.40	41.42	57.34	30.20
本文基于有监督对比学习损失的方法	93.77	42.91	58.48	30.93

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表 5 不同输入下的阅读技巧识别器的识别准确率 (%)

Table 5 The recognition accuracy of reading skill recognizer under different inputs (%)

实验设置	验证集	测试集
只输入问题	85.31	82.56
输入问题和文章	92.24	93.77

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