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姓名 賴昆佑(Kun-You Lai)  查詢紙本館藏   畢業系所 資訊管理學系
論文名稱 以統計分析探討文件分類程序對期刊論文分類效果之影響
(The Study of the Effects of Text Categorization Processes on Journal Papers Classification by Statistical Analysis)
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摘要(中) 期刊論文提供專業領域知識,然資訊超載造成檢索時間成本浪費,應用文件分類技術可讓使用者迅速取得相關領域之期刊論文。文件分類程序包含「前處理」、「文件特徵建構」、「分類方法應用」與「分類結果評估」等四個階段。針對期刊論文之分類效果,本研究以統計假設檢定探討期刊論文分類程序中,特徵權重方法、文章欄位差異與應用不同分類器對分類效果之影響,並與本研究設計之抽樣分配分類器進行比較。由實驗模擬與統計假設檢定分析顯示,第一,以特徵比例作為特徵權重方法分類效果顯著優於特徵頻率。第二,文章欄位以「摘要」之分類效果最佳,優於標題與關鍵字,後兩者則無顯著差異。第三,期刊論文分類以支持向量機分類效果最佳,其次為貝式機率分類器、決策樹以及抽樣分配分類器。第四,應用文件分類技術將期刊論文分類之方法可行。另外針對抽樣分配分類器部分,亦提出分析結果與建議,以提升未來研究所需。
摘要(英) Journal papers provide professional domain knowledge. Nevertheless, emerging of information overloading causes considerable cost of time. Application of text categorization technology could help users to retrieve domain journal papers efficiently. Four phases of text categorization process are “text pre-processing”, “document feature construction”, “applying classification methods” and “evaluation”. This research probes for the effectiveness of: feature weighting, fields of articles and classifiers during the process of journal papers categorization, and also applied sampling distribution classifier within the process. The hypothesis test analysis shows that: 1st, feature ratio performs well significantly than feature frequency. 2nd, fields of abstract are more effective than titles and keywords of journal papers, and there are no difference between the latter two. 3rd, Support vector machines are most effective, then naïve-bayes, decision trees and sampling distribution classifier in order. And 4th, text categorization of journal papers is feasible. Additionally, analysis and recommendation of sampling distribution classifier are also proposed for the future study.
關鍵字(中) ★ 統計檢定
★ 分類器
★ 期刊論文分類
★ 文件分類
關鍵字(英) ★ text categorization
★ journal papers classification
★ classifiers
★ hypothesis test
論文目次 摘要 v
Absrtact vi
目錄 ix
1序論 1
1.1 研究背景與動機 1
1.2 研究目的 3
1.3 論文架構 5
2. 文獻探討 6
2.1 文字探勘與機器學習 6
2.2 文件分類 10
2.3 分類器 16
3. 研究方法 21
3.1 研究問題 21
3.2 研究流程 24
3.3 分類方法 26
4. 實驗結果與分析 31
4.1 實驗設計 31
4.2 特徵權重方法分類效果差異檢定 35
4.3 文章欄位分類效果差異檢定 41
4.4 抽樣分配分類器之信心水準分類效果差異檢定 50
4.5 分類器分類效果差異檢定 58
5. 結論與建議 65
5.1 結論 65
5.2 研究限制 66
5.3 未來研究方向 67
參考文獻 68
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指導教授 薛義誠(Yih-Chearng Shiue) 審核日期 2007-7-12
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