By expanding the library services this paper understands the process from document information services to knowledge services and puts forward the platform of building the library services.
通过对图书馆服务的论述，明晰了文献信息服务走向知识服务的的演变过程，提出了构建图书馆服务平台的途径。
This research paper begins with the mathematical models of digital library based on pervasive computing, and finally proposes the necessary conditions of building such a platform.
本文从数字图书馆的数学模型入手，进而建立起基于普适计算的数字图书馆框架，最后提出了搭建该平台必要条件。
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