用户模型是个性化服务系统中的关键技术。
User model is the key technology in the personalized service system.
针对用户兴趣和偏好建立用户模型，是整个数字图书馆个性化服务系统中的关键技术。
The establishment of user model, based on the user's interests and hobby, is the key techniques in the individuation-service-system in digital library.
个性化服务系统首先需要建立用户模型，然后才能针对不同用户的不同兴趣偏好提供个性化服务。
Before the personalized services for different users with different interests and preferences are provided, user models for the personalized service system must be constructed.
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