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題名:新興分類技術於行為評等模式之建構
作者:陳怡妃
作者(外文):I-fei Chen
校院名稱:輔仁大學
系所名稱:商學研究所
指導教授:李天行
學位類別:博士
出版日期:2008
主題關鍵詞:支援向量機特徵篩選特徵萃取行為評等資料探勘support vector machinesfeature selectionfeature extractionbehavioral scoringdata mining
原始連結:連回原系統網址new window
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  • 被引用次數被引用次數:期刊(2) 博士論文(1) 專書(0) 專書論文(0)
  • 排除自我引用排除自我引用:2
  • 共同引用共同引用:0
  • 點閱點閱:39
面對高度產業競爭與時效壓力,信用卡發行機構不僅須長期經營顧客之信貸關係,亦須及時規避潛在之違約風險。然而銀行用以分析之資料庫,其龐雜內容,致使預測持卡人之未來還款行為,更形困難。有鑑於此,本研究試圖整合無母數多元適應性雲形迴歸、無母數加權特徵萃取及支援向量機等資料探勘技術,而先將高維度資料進行特徵篩選、萃取,以縮減維度與運算複雜度,並從中捕捉資料型樣,再將萃取所得之特徵,作為分支援向量機之輸入向量,以判別顧客未來還款之狀態。藉此整合方法所建構之顧客行為評等模式,相較於傳統鑑別分析、多元適應性雲形迴歸、類神經網路及支援向量機等模式,冀能獲致更佳分類結果。本研究即以國內某家發卡銀行之顧客資料,進行實證分析。結果顯示,整合方法之整體鑑別率,具有顯著之優越性,並對三類客群之個別辨識,表現最佳,且其所招致之誤置成本亦為最低。此外,整合模式不僅可有效縮短支援向量機之模式訓練時間,同時,能助於個案公司獲取顧客分類之參考準則,而強化行為評等模式之管理意涵解釋能力。
Analyzing high-dimensional bank data to discover valuable information has long been recognized as a very difficult and challenging task. Accordingly, this study attempts to propose a three-stage ensemble classification method which incorporates multivariate adaptive regression splines(MARS) serving as a vehicle of feature selection, nonparametric weighted feature extraction(NWFE) for dimension reduction, and support vector machines(SVMs) as a classifier in constructing a cardholder behavioral scoring model. The major purpose of doing so is discerning customers’ future repayment status with desired classification accuracy, low misclassification costs and shortened model computation time. Analytical results reveal that proposed three-stage classification model outperforms the conventional and innovative discriminant analysis, artificial neural networks, MARS and SVMs techniques under various performance criteria. In addition, it is also noted that the proposed method can also provide managerial implications for real world practices.
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