The data deletion model and the mean drift model are equivalent in a general linear regression model.

为了诊断具有异方差的线性回归模型的异常点，建立了具有异方差的均值漂移模型和数据删除模型。

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The structure of knowledge base is build by the database of relational data model. In order to add rules and delete reduplicate rules, knowledge base has the function of addition, deletion and so on.

本文采用了基于规则的知识表示方法，并采用了关系型数据库建立本系统的知识库，知识库具有添加、删除等功能，实现规则的增加及重复规则的删除。

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