关键词: 代价敏感, 集成学习, 云计算平台, 不平衡分类；分布式

Abstract:

With respect to the classification of large scale imbalanced data, a distributed cost-sensitive ensemble learning algorithm based on cloud computing platform was proposed. The large scale data was divided on Hadoop cloud computing platform and was used  in parallel learning. Based on the idea of cost-sensitive, a weighted ensemble classifier was achieved, and a distributed cost-sensitive ensemble learning model based on cloud computing platform was developed. Experiment results showed that the recall rate of the minority class was improved significantly and the computational time was shortened by the ensemble learning on cloud computing platform due to the Hadoop parallel mechanism. In additron,  the classification efficiency of the large-scale imbalanced problem was largely improved.

Key words: cost sensitive learning, ensemble learning, cloud computing platform, imbalanced pattern classification, distribution