中文摘要：

以最小的能耗代价取得用户所需的精确信息是无线传感器网络的一个主要目标．针对一类具体的应用，利用测量数据间的时域相关性分析了信息精确度与观测频率以及能耗与观测频率的关系，构建了信息精确度与能耗的关系模型．理论分析和仿真试验结果都表明：虽然信息精确度和能耗都随观测频率的增大而增大，但是，当观测频率增大到一定程度后，信息精确度的增量变得非常小，而能耗却持续增大．

英文摘要：

Wireless sensor networks aims at achieving the required information accuracy with minimum energy consumption. Based on one kind of applications, we exploit the temporal correlation airing sensed data to illustrate the relationships between information accuracy and sensing frequency as well as energy consumption and sensing frequency. A model on information accuracy and energy consumption is given based on these relationships. Both the analytical and simulation results show： although both the information accuracy and energy consumption increase as the sensing frequency increases, the increment of information accuracy is only a few when sensing frequency is large enough.