以知識本體為基礎的中文查詢擴展

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姓名

江舜絃(Shun-hsien Chiang) 查詢紙本館藏

畢業系所

資訊管理學系

論文名稱

以知識本體為基礎的中文查詢擴展
(A Knowledge-based Chinese Query Expansion System)

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本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

在面對現在資訊爆炸的時代，搜尋引擎變成每個人生活中不可或缺的工具，因此如何協助使用者過濾過量的資訊，同時考量個人搜尋意圖，達成個人化的搜尋排序一直是相當重要的議題。
基於上述的理念，本研究以知識本體描繪使用者偏好的框架為藍圖，提出在中文環境下的關鍵詞推薦系統，實現中文環境下的查詢擴展。透過網頁爬行器分析使用者過去瀏覽的所有網站地圖，以正規概念分析法自動建構涵蓋面較廣的個人化領域知識，同時以「知網」為輔，結合查詢擴展的方法與個人化知識本體的自動學習，檢索到更為完備的資訊。當使用者輸入關鍵字時，系統會比對關鍵字與使用者檔案中的個人化知識本體中的概念，產生與關鍵字概念相仿的延伸關鍵字集合推薦給使用者，藉以擷取更多描述同一概念的文件資訊。根據實驗結果顯示，本系統有效的提升了七成以上的檢索精確率，最佳的效能提升了兩倍，證明藉由過濾大部分與使用者興趣不相關的網頁，以取得使用者真正想要的資訊，相較於傳統的本體論查詢擴展方法，本研究提出的演算法利用使用者知識庫的自動產生、涵蓋面寬廣的訓練資料來源擷取、半自動的中文化擴展字詞推薦與適用於繁體漢字的知網義原庫，的確能有效提升在中文環境下資訊檢索的精確率。

摘要(英)

Search engine has become an essential tool in the era of the information explosion, hence the topic of helping users to filter an excess of information and take personal implicit searching intentions into consideration in order to reach personalized searching ranking has always been important.
Knowledge ontology was used to depict user’s preference and a Chinese keyword recommendation system was proposed to accomplish a Chinese Query Expansion. Analyzing the site maps of the whole user’s past browsing via web crawler, constructing a wider range of personalized domain knowledge automatically by Formal Concept Analysis, and combining Query Expansion and personal ontology which is automatic-learning through HowNet, the more complete information can be accessed easily. When user submits keywords, the system will compare keywords and concepts of personalized ontology in user’s profile in order to produce extended keyword sets similar to the keywords inputted and to be recommended to user to acquire more document information including the same concepts. The experimental results show that the system increases the retrieval precision over 70% and the retrieval precision almost doubles.
By filtering most web documents unconcerned with user’s interests to acquire the actual needed information. The algorithm we proposed that provide automatic-generated user’s knowledge database, a wider range of training data source, a semi-automatic recommended mechanism of Chinese expansion words, and a sememe database of HowNet in Traditional Chinese, is proved to have better retrieval accuracy in the Chinese environment compare to methods of ordinary ontology query expansion.

關鍵字(中)

★ 正規概念分析法
★ 查詢擴展
★ 本體論
★ 知網

關鍵字(英)

★ Formal Concept Analysis
★ HowNet
★ Ontology
★ Query Expansion

論文目次

中文摘要 ................................................................. I
Abstract ................................................................ II
圖目錄 ................................................................... V
表目錄 .................................................................. VI
第一章緒論 ............................................................. 1
1.1 研究動機 ........................................................... 1
1.2 研究目的 ........................................................... 2
1.3 研究限制 ........................................................... 2
1.4 論文架構 ........................................................... 2
第二章文獻探討 .......................................................... 3
2.1 語意網 ............................................................. 3
2.2 本體論 ............................................................. 6
2.2.1 本體論的定義 ................................................... 6
2.2.2 知識本體的組成元素 ............................................. 8
2.2.3 本體論的建置方法 ............................................... 8
2.3 正規概念分析法 .................................................... 11
2.3.1 正規本文 ...................................................... 11
2.3.2 概念方格 ...................................................... 13
2.4 中文字詞處理技術 .................................................. 13
2.4.1 中文詞知識庫小組 .............................................. 14
2.4.2 知網 .......................................................... 17
2.4.3 基於知網的詞語相似度計算 ...................................... 18
2.5 查詢擴展 .......................................................... 22
2.6 關鍵字權重計算 .................................................... 24
第三章系統分析與設計 ................................................... 25
3.1 系統架構 .......................................................... 25
3.2 文件前處理 ........................................................ 27
3.3 關鍵詞彙擷取 ...................................................... 28
3.4 知識建構 .......................................................... 31
3.5 擴展關鍵詞推薦 .................................................... 34
第四章系統實作與驗證 ................................................... 37
4.1 開發工具與實驗環境 ................................................ 37
4.2 使用者檔案建構資料來源 ............................................ 38
4.3 評估方法 .......................................................... 39
4.4 實驗結果與分析 .................................................... 40
4.4.1 實驗設計 ...................................................... 40
4.4.2 實驗結果 ...................................................... 42
4.4.3 實驗分析 ...................................................... 46
4.5 系統效能評估 ...................................................... 47
第五章結論與建議 ....................................................... 50
5.1 結論與貢獻 ........................................................ 50
5.2 未來研究方向 ...................................................... 52
參考文獻 ................................................................ 54
英文文獻 .............................................................. 54
中文文獻 .............................................................. 57
網站部分 .............................................................. 58

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指導教授

薛義誠、謝浩明
(Y. C. Shiue、How-ming Shieh)

審核日期

2009-7-16

推文