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研究生: 盛貫宇
SHENG, Kuan-Yu
論文名稱: 以查詢詞標籤輔助指標生成網路之查詢式摘要系統
A Query based Summarization System by Extending Pointer Generator Network with Query Tag
指導教授: 柯佳伶
Koh, Jia-Ling
口試委員: 陳良弼 吳宜鴻 范耀中 柯佳伶
口試日期: 2021/08/17
學位類別: 碩士
Master
系所名稱: 資訊工程學系
Department of Computer Science and Information Engineering
論文出版年: 2021
畢業學年度: 109
語文別: 中文
論文頁數: 54
中文關鍵詞: 查詢式摘要任務抽象式文件摘要系統類神經網路生成模型
DOI URL: http://doi.org/10.6345/NTNU202101268
論文種類: 學術論文
相關次數: 點閱:51下載:12
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  • 本論文擴展進行文本一般性摘要的指標生成網路,建構一個給定查詢詞為輸入型式的查詢式摘要系統。本論文所提出模型以查詢詞標籤輔助從文本學習到查詢詞相關語意,並設計句意混合單元加強模型對句子層級語意的理解,用以有效生成與查詢詞相關的摘要結果。此外,以監督式學習的查詢式摘要生成系統需要足夠多的 <文本,查詢詞,查詢摘要> 資料進行模型訓練,但人工標示成本極高而不易取得。因此本論文提供一個自動化方法,根據語法分析從現有一般性摘要資料集轉換成查詢式摘要資料集的形式,以提供模型建構及測試用。實驗結果顯示本論文由CNN/Dailymail轉換產生的查詢式摘要資料集較相關研究能提供模型更好的訓練效果。且本論文所提查詢詞標籤輔助的查詢式摘要生成模型,能有效解決查詢詞為系統未知語意字彙而影響摘要生成效能的問題,並透過句意混和單元提升模型生成結果與查詢詞內容相關的精確度。

    一、緒論 1 1.1 研究動機與目的 1 1.2 論文方法 5 1.3 論文架構 6 二、文獻探討 7 2.1 一般性自動化摘要任務 7 2.1.1提取式摘要 7 2.1.2抽象式摘要 8 2.1.3指標生成網路 9 2.2 基於查詢式的自動化摘要 11 三、查詢式摘要資料集建構 14 3.1摘要句之主體詞擷取 14 3.2查詢詞擷取 17 四、模型架構 20 4.1編碼過程 20 4.1.1編碼器以及文字與查詢詞標籤向量 21 4.1.2句意融合單元 22 4.2解碼過程 22 4.2.1解碼器 22 4.2.2文本情境向量的計算 23 4.2.3輸出字彙的產生 24 4.3損失函數計算 26 五、實驗結果與探討 27 5.1實驗設定 27 5.1.1實驗資料集處理 27 5.1.2模型參數設定 30 5.1.3效能評估指標 31 5.2一般性摘要系統與本論文所提查詢式摘要模型的生成效果評估 35 5.3查詢式摘要訓練資料集產生方式評估 38 5.4多種變項對查詢式摘要生成效果的影響評估 42 5.4.1查詢詞中是否有UNK的摘要生成效果評估 42 5.4.2採用不同主體數目訓練資料對模型之摘要生成效果評估 45 5.4.3句意融合單元對於模型生成結果的影響探討 48 六、結論與未來研究方向 50 參考文獻 52

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