User model building includes user information acquisition, the representation of user model and the update of user model.

用户模型建立工作主要分为用户知识的获取、用户模型表示、用户模型更新。

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Secondly, a knowledge acquisition model for the incomplete information systems for the university personnel system on the basis of the tolerance relation assignment reduction using GA is designed.

其次，设计了一个基于本文提出的基于相容关系的分配约简遗传算法的高校人事不完备信息系统的知识获取模型。

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By radically changing the information technology business model, cloud computing also challenges the traditional federal acquisition process.

FORBES: Feds Focus on Cloud Acquisition Strategies