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論文名稱 Title |
綜合法則歸納系統之延伸研究 An Extension to the Composite Rule Induction System |
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系所名稱 Department |
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畢業學年期 Year, semester |
語文別 Language |
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學位類別 Degree |
頁數 Number of pages |
85 |
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研究生 Author |
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指導教授 Advisor |
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召集委員 Convenor |
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口試委員 Advisory Committee |
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口試日期 Date of Exam |
2007-07-19 |
繳交日期 Date of Submission |
2007-07-30 |
關鍵字 Keywords |
法則歸納、資料探勘、知識淬取、專家系統 Rule Induction, Knowledge Management, Knowledge-based systems, Data Mining |
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統計 Statistics |
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中文摘要 |
綜合法則歸納系統之延伸研究 知識淬取一直都是專家系統 (Expert System, ES) 設計的瓶頸,而專家系統中的知識單元更是由這些被淬取的知識所組成,因此知識模型的良寙直接影響專家系統表現的優劣。克服該瓶頸的方法之一,便是自資料樣本中推論出專家法則,也因此有眾多學者專家建議使用有效的分析技術,淬取出專家知識法則 (D. Michie, 1983)。在許多的知識模型 (Pattern) 淬取技術中,較常被使用的分類與預測 (Classification and Prediction) 淬取技術包含ID3、C4.5、類神經網路 (Artificial Neural Network, ANN)…等技術;但這些技術通常利用相同的標準處理類別與非類別 (例:數值資料) 特徵值 (Attribute),因此可能因為資料轉換的偏誤導致分類知識模型產生誤差。 為使資料探勘技術能同時以不同之方式,處理類別與非類別特徵值 (Attribute),Liang於1992年提出『綜合法則歸納系統』 (Composite Rule Induction System, CRIS),利用Tabular Approach與Statistical Elaboration的方式,分別分析Qualitative與Quantitative之特徵值以產生較精確之分類法則,同時利用機率運算 (Bayesian Theorem) 將分類法則與事件機率間之關聯被清楚地呈現。但該方法僅能處理二元類別之分析,且建立之歸納法則亦無法明確呈現自變項特徵值 (Independent Attribute) 分類鑑別效力。 故本研究提出『複類別特徵值判定』、『特徵值效力檢定』及『假說法則產生限制』等三個方法,改善CRIS技術僅能處理二元類別分析的限制,並呈現出分類法則的鑑別效力。且為了驗證改良CRIS方法之可行性,本研究建立一套簡單的CRIS系統,並使用Cytel Software Corporation開發的XLMiner3做為標竿測試 (Benchmark Testing) 對照組,進行各分類技術之『執行效率』、『分類模型錯誤率』及『分類模型預測準確力』等績效之測試比較。 |
Abstract |
An Extension to the Composite Rule Induction System Discovering knowledge from data is an important task for knowledge management and development of intelligent systems, which is called knowledge acquisition or data mining. Many techniques have been developed for such purpose. For example, ID3, C4.5 (tree induction techniques) and Artificial Neural Networks are among the popular techniques in “Classification and Prediction” area. However, these methods often use the same criteria to analyze nominal and non-nominal attributes, which is very likely to produce biased knowledge due to mis-match between data type and their algorithms. In Liang (1992), he proposed a composite approach called CRIS to inducing knowledge that introduces statistical concepts and data mining heuristics and found the composite method outperformed other methods including tree induction, discriminant analysis, and neural networks. However, the paper focuses on the classification of binary objects and did not describe how the approach can be applied to a problem with more than two classes in the dependent variable. In this research, we extend the previous approach to solve the problem with more than two classes. We also enhance the approach by adding steps to prioritizing attributes using their identification power and controlling the growth of generated hypothesis. In order evaluate the extended CRIS method, a prototype system, eCRIS, was developed and compared with a commercial data mining package, XLMiner3 (developed by Cytel Software Corporation) using three existing datasets in data mining research. The results indicate that the extended CRIS outperforms tree induction and backpropagation in neural networks in datasets that include both nominal and non-nominal data and performed equally well with them. |
目次 Table of Contents |
目 錄 第壹章、 緒論 1 第一節、 研究背景與動機 1 第二節、 研究目的 4 第三節、 研究步驟 5 第四節、 本文結構 7 第貳章、 文獻探討 8 第一節、 資料探勘簡介 8 第二節、 分類模型知識探勘技術 13 第三節、 分類決策樹之技術簡介 19 第四節、 貝氏分類法技術之簡介 25 第五節、 人工類神經網路技術之簡介 27 第六節、 K個最近鄰居分類法技術之簡介 31 第七節、 綜合法則歸納系統技術之簡介 34 第參章、 綜合法則歸納系統 43 第一節、 複類別特徵值判定 46 第二節、 特徵值效力檢定 50 第三節、 假說法則產生限制 52 第肆章、 綜合法則歸納系統設計與實作 53 第一節、 系統需求分析 53 第二節、 綜合法則歸納系統介紹 55 第三節、 綜合法則歸納系統績效實證 65 第伍章、 研究結論與建議 71 第一節、 研究貢獻 71 第二節、 研究限制 72 第三節、 後續研究 73 參考文獻 74 附 表 目 錄 表 一 、模型準確度統計表 17 表 二 、高爾夫球賽決策資料集 22 表 三 、筆記型電腦購買意願 26 表 四 、類別關聯次數分析表 35 表 五 、非類別特徵值統計量表 36 表 六 、鳶尾花資料集說明 44 表 七 、部份鳶尾花資料集 45 表 八 、鳶尾花資料集的非類別特徵值統計量表 47 表 九 、鳶尾花資料集的常態假說法則 49 表 十 、鳶尾花資料集的基礎假說法則 49 表 十一 、具特徵值效力之常態假說法則 51 表 十二 、酒類常態分類法則 52 表 十三 、測試資料集說明表 65 表 十四 、績效測試結果比較表 67 表 十五 、各資料集最佳預測技術及方法 67 附 圖 目 錄 圖 一 、研究流程圖 6 圖 二 、知識發掘流程圖 9 圖 三 、購買筆記型電腦意願的分類知識模型 13 圖 四 、ID3演算法 21 圖 五 、高爾夫球賽決策樹 23 圖 六 、類神經元模型 27 圖 七 、人工類神經網路之三層式架構圖 28 圖 八 、K-NEAREST NEIGHBOR分類法 32 圖 九 、特徵值分類圖 36 圖 十 、法則篩選器演算法 41 圖 十一 、綜合法則歸納系統之系統流程圖 42 圖 十二 、複類別特徵值分類圖 46 圖 十三 、複分類特徵值分析法 48 圖 十四 、鑑別力不足之非類別特徵值分類圖 50 圖 十五 、綜合法則歸納系統流程圖 55 圖 十六 、綜合法則歸納系統架構圖 56 圖 十七 、綜合法則歸納系統之訓練資料介面 57 圖 十八 、綜合法則歸納系統之特徵值定義介面 58 圖 十九 、基礎假說法則 (CANDIDATE CUT RULES) 60 圖 二十 、常態假說法則 (CANDIDATE REGULAR RULE) 61 圖 二十一 、候選基礎法則之SALIENCY值 62 圖 二十二 、候選常態法則之SALIENCY值 63 圖 二十三 、CRIS建構之知識模型 63 圖 二十四 、CRIS知識模型之案例錯誤率 64 |
參考文獻 References |
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