嵌入代价敏感的极限学习机相异性集成的基因表达数据分类  

Dissimilarity Based Ensemble of Extreme Learning Machine with Cost-sensitive for Gene Expression Data Classification

作　　者：安春霖[1] 陆慧娟[1] 魏莎莎[1] 杨小兵[1] 

机构地区：[1]中国计量学院信息工程学院,杭州310018

出　　处：《计算机科学》2014年第12期211-215,共5页Computer Science

基　　金：国家自然科学基金(61272315;60842009);浙江省自然科学基金(Y1110342);浙江省科技厅国际合作项目(2012C24030)资助

摘　　要：极限学习机的相异性集成算法(Dissimilarity Based Ensemble of Extreme Learning Machine,D-ELM)在基因表达数据分类中能够得到较稳定的分类效果,然而这种分类算法是基于分类精度的,当所给样本的误分类代价不相等时,不能直接实现代价敏感分类过程中的最小平均误分类代价的要求。通过在分类过程中引入概率估计以及误分类代价和拒识代价重新构造分类结果,提出了基于相异性集成极限学习机的代价敏感算法(CS-D-ELM)。该算法被运用到基因表达数据集上,得到了较好的分类效果。Dissimilarity based ensemble of Extreme Learning Machine （D-ELM） gets stable classification results on gene expression data classification.While this algorithm is based on the classification accuracy,it cannot meet the requirement to get the minimum misclassification of cost-sensitive classification,when the misclassification costs are not equal.This paper used probability estimate and misclassification cost to reconstruct the classification results.Then we proposed the algorithm of Cost-sensitive Dissimilarity based ensemble of Extreme Learning Machine （CS-D-ELM）.This algorithm is applied on the data of gene expression and the experiment demonstrates that it can get better result.

关 键 词：极限学习机 相异性集成 代价敏感 基因表达数据 分类 

分 类 号：TP181[自动化与计算机技术—控制理论与控制工程]