西安交通大学现代设计和转子轴承系统教育部重点实验室,西安,710049
网络首发:2007-11-10,
纸质出版:2007
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杨俊燕, 张优云, 朱永生. ε不敏感损失函数支持向量机分类性能研究[J]. 西安交通大学学报, 2007,41(11):1315-1320.
杨俊燕, 张优云, 朱永生. Classification Performance of Support Vector Machine with ε-Insensitive Loss Function[J]. 2007, 41(11): 1315-1320.
将原先用于支持向量回归的ε不敏感损失函数引入到支持向量分类中
提出ε不敏感损失函数支持向量分类算法(ε-SVC).同标准支持向量分类方法(C-SVC)和最小二乘支持向量分类方法(LS-SVC)相比较
试验结果表明:当赋予参数ε一个足够大的接近于1的值时
ε-SVC的分类正确率略低于C-SVC和LS-SVC
但是ε-SVC的训练、测试和参数选择的速度要高于C-SVC和LS-SVC.特别是对于大规模数据集
这种优势将更加明显.另外
通过精确选择参数ε的值
ε-SVC能够获得比C-SVC和LS-SVC更高的分类正确率
但是训练、测试和参数选择的速度却随着ε的减小而降低.
The ε-insensitive loss function generally employed in support vector regression is introduced into support vector classification
and the support vector classification with ε-insensitive loss function(ε-SVC)is proposed. Compared with the standard support vector classification method(C-SVC)and the least square support vector classification method(LS-SVC)
the experimental result indicates that the classification accuracy ratio of ε-SVC is slightly lower than that of C-SVC and LS-SVC when ε sufficiently approaches to 1
but the training
testing and parameter selecting rates of ε-SVC are superior to that of C-SVC and LS-SVC
especially for large scale problem. Through accurate search of the parameter ε
the ε-SVC is endowed with higher classification accuracy than C-SVC and LS-SVC
however
the training
testing and parameter selecting rates decrease with smaller ε.
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