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代价敏感分类器的比较研究
引用本文:凌晓峰,SHENG Victor S.. 代价敏感分类器的比较研究[J]. 计算机学报, 2007, 30(8): 1203-1212
作者姓名:凌晓峰  SHENG Victor S.
作者单位:加拿大西安大略大学计算机科学系,伦敦,加拿大;加拿大西安大略大学计算机科学系,伦敦,加拿大
基金项目:Acknowledgements The authors thank NSERC for the support of their research.
摘    要:简要地回顾了代价敏感学习的理论和现有的代价敏感学习算法.将代价敏感学习算法分为两类,分别是直接代价敏感学习和代价敏感元学习,其中代价敏感元学习可以将代价不敏感的分类器转换为代价敏感的分类器.提出了一种简单、通用、有效的元学习算法,称为经验阈值调整算法(简称ETA).评估了各种代价敏感元学习算法和ETA的性能.ETA几乎总是得到最低的误分类代价,而且它对误分类代价率最不敏感.还得到了一些关于元学习的其它有用结论.

关 键 词:代价敏感学习  元学习  经验阈值调整
修稿时间:2007-03-20

A Comparative Study of Cost-Sensitive Classifiers
LING Charles X.,SHENG Victor S.. A Comparative Study of Cost-Sensitive Classifiers[J]. Chinese Journal of Computers, 2007, 30(8): 1203-1212
Authors:LING Charles X.  SHENG Victor S.
Affiliation:Department of Computer Science, The University of Western Ontario, London, Ontario N 6A 5B7, Canada
Abstract:The authors briefly review the theory of cost-sensitive learning, and the exist ing cost-sensitive learning algorithms. The authors categorize cost-sensitive learning algorithms into direct cost-sensitive learning and cost-sensitive met a-learning, which converts cost-insensitive classifiers into cost-sensitive o nes. The authors also propose a simple yet general and effective meta-learning method called Empirical Threshold Adjusting (ETA for short). The authors evalu ate the performance of various cost-sensitive meta-learning algorithms includi ng ETA. ETA almost always produces the lowest misclassification cost, and is l east sensitive to the misclassification cost ratio. Other useful conclusions on cost-sensitive meta-learning methods are drawn. This is an improved and expanded version of the paper "Thresholding for Maki ng Classifiers Cost-sensitive" by Victor S.Sheng and Charles X.Ling, publis hed in AAAI 2006.
Keywords:cost-sensitive learning  meta-learning  E mpirical Threshold Adjusting (ETA)
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