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中文摘要：
针对无线传感器网络中有QoS需求的目标监控覆盖问题，首先证明了该问题的NP完全性，然后使用线性规划的方法进行了建模．由于涉及的搜索空间太大，直接进行求解较为困难，为此提出了一种基于最小化能量浪费的近似算洗实验结果表明，该算法有效地降低了系统能耗，延长了网络的生命周期．
英文摘要：
Implementation of target coverage with QoS requirements remains a challenge for wireless sensor networks. This is an NP-complete problem here, and can still be formulated based on linear programming technique. However, directly solving this optimization seems desperately complex due to the combinatorial complexity. Thus a minimum monitoring energy cost based approximation algorithm was proposed to solve this problem. Numerical experiments demonstrate that our approach can decrease system energy consumption sharply and therefore prolong network lifetime efficiently.
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