求翻译：传感器节点的部署是无线传感网络研究中的一个基本问题。在传感器节点数量确定的情况下，如何恰当地在监测区域部署传感节点，延长网络使用寿命，对于无线传感网络的研究具有极其重要的理论价值。针对监测区域信息平稳变化的应用场合，提出层域的概念，通过结合分区路由策略预估各层域能耗，以层域间能耗平衡为目标，确定各层域中应部署的节点数目，再进一步根据预知的变化情况确定各簇需部署的节点数。仿真结果表明在信息平稳变化情况下，通过该算法确定的节点部署有助于延长网络使用寿命。是什么意思？

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The Sensor nodes are deployed wireless sensor network research in one of the fundamental issues. In the sensor node number of the cases, the proper monitoring of the regional deployment in sensing node, longevity of a network, a wireless sensor networks research is of the utmost importance in theore

Sensor node deployment is a basic problem in wireless sensor networks. Determine the number of cases at the sensors node, how to properly monitor region deployment of sensor nodes, extend the life network, for wireless sensor networking research is extremely important in the theory of value. Smooth