Cost-Sensitive学习的一个新课题

A New Issue in Cost-Sensitive Learning

Cost-Sensitive学习注重分类过程中的各种代价,特别是误分类代价和属性代价。在Cost-Sensitive学习中还有一种代价对分类的总代价有较大影响,这种代价可称为分类延时代价,即延误分类而造成的代价。包含分类延时代价的Cost-Sensitive学习是Cost-Sensitive学习中一个新的课题,这个新课题的目标是使分类过程中的误分类代价、检查代价及分类延时代价之和达到最小。给出包含一种简单的分类延时代价的Cost-Sensitive学习,提出一个既"摊薄"延时代价又减少浪费检查代价的检查策略。

Cost-Sensitive learning considers a variety of costs in classification. Test costs and misclassification costs are two most important costs. There is another important cost, it can be called classification delay costs, has not been studied deeply. Cost-Sensitive Learning involving classification delay costs is a new issue in Cost-Sensitive learning. The goal of the study on this issue is to minimize the sum of mis-classification costs, test costs and classification delay costs in classification. In this paper, a kind of Cost-Sensitive Learning involving classification delay costs is discussed, and a novel test strategy is pro-posed, which share a classification delay cost by multiple tests and reduce waste ot batch test costs simultaneously.