After the concept of User Correlative Degree (UCD) is presented, the development and implementation of PDM are classified into three kinds according to different modules and UCDs.
提出了用户相关度的概念，并基于模块化设计原则与用户相关度概念，对PD M开发与实施进行了模块划分与不同相关度分类。
After the concept of User Correlative Degree (UCD) is presented, the development and implementation of PDM are classified into three kinds according to different modules and UCDs.
提出了用户相关度的概念，并基于模块化设计原则与用户相关度概念，对PD M开发与实施进行了模块划分与不同相关度分类。
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