The major works of this paper are listed as follows. Design a context-aware middleware and implement a prototype system.
本文的主要工作涉及以下几个方面：设计了一种上下文感知中间件，并实现了原型系统。
The sensor nodes must be aware its position to explain 'what happens and where ', to implement the target of the location and tracking.
传感器节点必须准确定位才能说明“在什么位置或区域发生了特定事件”，实现对外部目标的定位和追踪。
The sensor nodes must be aware its position to explain 'what happens and where ', to implement the target of the location and tracking.
传感器节点必须准确定位才能说明“在什么位置或区域发生了特定事件”，实现对外部目标的定位和追踪。
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