使用句對模型在文章中抓取相關資訊用於問題生成

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姓名

李哲豪(Che-Hao Li) 查詢紙本館藏

畢業系所

資訊工程學系

論文名稱

使用句對模型在文章中抓取相關資訊用於問題生成
(Using Sentence Pair Model to Capture Relevant Information from Document for Question Generation)

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摘要(中)

近幾年問題生成的研究發展迅速，過去以句子的語法結構定義規則生成問題，隨著深度學習成熟的技術，現今機器能理解語意並自動產生適當的問題。

問題生成的目標是給定一段文字訊息與答案，產生相對應的問題，與機器閱讀理解任務類似，因此閱讀理解的資料集常被用在問題生成任務中。以往問題生成模型的輸入並非整篇文章，而是包含答案的句子，但有些問題的內容和答案不在同一個句子，可能是依據其他句子資訊產生該答案的問題，於是本論文提出一個新架構，由句對模型和問題生成模型所組成，利用句對模型處理文章結構，將每一句資訊與包含答案的句子進行匹配，計算各自的相關程度並且重新賦予句子權重，接著傳送到問題生成模型產生最終的問題。句對模型主要目的是從整篇文章中自動找尋和答案有關的內容進而產生適合的問題。

實驗結果表示，我們的系統能有效處理文章結構，相比只有問題生成模型的系統，在中文和英文的資料集都有更好的表現。

摘要(英)

In recent years, question generation (QG) has developed rapidly. In the past, using rules that are based on syntactic structure to generate questions. Nowadays, the machine can understand semantic and automatically generate appropriate questions with a proven technique of deep learning.

Question generation aims to generate corresponding questions from a given passage and answer. It is similar to machine reading comprehension (RC) task. Therefore, reading comprehension dataset is often used to question generation task. The input of the previous question generation model is the sentence containing the answer rather than the whole article. However, the content of some questions and its answers are not in the same sentence. The question may be based on other information in sentences. Then, our paper proposed a new framework which consists of sentence pair model and question generation model. Using the sentence pair model to process article structure. Its method is matching each sentence and the sentence containing the answer to compute the respective degree of correlation to reweight sentences and then produce questions by question generation model. The main purpose of sentence pair model is to automatically find the content related to the answer from the article.

Experiment results show that our system can handle article structure. In contrast to a system with only question generation model, our system has better performance in Chinese and English dataset.

關鍵字(中)

★ 問題生成
★ 閱讀理解
★ 序列到序列
★ 注意力機制
★ 複製機制
★ 句對模型
★ 深度學習

關鍵字(英)

★ Question Generation
★ Reading Comprehension
★ Sequence to Sequence
★ Attention Mechanism
★ Copy Mechanism
★ Sentence Pair Model
★ Deep Learning

論文目次

摘要ii
Abstract iii
誌謝v
目錄 vii
圖目錄 ix
表目錄 x
一、緒論1
1.1 研究背景.................................................................. 1
1.2 研究動機.................................................................. 3
1.3 章節概要.................................................................. 4
二、相關研究5
2.1 自然語言處理(Natural Language Processing, NLP)............ 5
2.2 深度學習(Deep Learning) ............................................ 5
2.3 自然語言生成(Natural Language Generation, NLG)........... 6
2.4 注意力機制(Attention Mechanism) ................................ 7
2.5 問題生成(Question Generation, QG) .............................. 7
2.6 自然語言推理(Natural language Inference, NLI) ............... 9
三、系統架構10
3.1 資料前處理............................................................... 11
3.2 詞嵌入..................................................................... 11
3.3 句子編碼器............................................................... 11
3.3.1 Attention-Based Convolutional Neural Network ........ 12
3.3.2 Match-LSTM .................................................... 14
3.4 訊息編碼器............................................................... 15
3.5 問題解碼器............................................................... 17
四、實驗方法與討論20
4.1 資料集..................................................................... 20
4.1.1 台達閱讀理解資料集(Delta Reading Comprehension
Dataset, DRCD)................................................... 20
4.1.2 史丹佛問題答案資料集(Stanford Question Answering
Dataset, SQuAD)................................................... 20
4.2 評估方法.................................................................. 21
4.2.1 BLEU ............................................................. 21
4.2.2 F-score ............................................................ 22
4.3 參數設定.................................................................. 22
4.4 實驗結果.................................................................. 23
4.5 討論........................................................................ 26
五、結論與未來工作28
參考文獻29

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指導教授

蔡宗翰(Tsung-Han Tsai)

審核日期

2019-7-23

推文