Be aware that the transaction coordination context is part of each message, even messages between applications and messages from applications to the database service.
需要注意得是，任何消息都包含事务协调上下文，不管是应用程序间的消息还是应用程序发送给数据库的消息。
But system, which provides knowledge searching service isn't aware of users' context information, such as location, profile, time, and so on.
因此，通过上下文知晓为用户提供合适的知识查找服务是一个重要的研究课题，具有深远的理论意义和实用价值。
Based on traditional design model, an application design model of ubiquitous computing is introduced. Service oriented computing and context aware computing was integrated to form this design model.
本文首先从普适计算环境出发，在研究传统应用模型的基础上，提出了普适计算的应用模型，指出这种应用模型是面向服务的计算和察觉上下文计算的结合。
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