传感器网络节点数目算法的比较研究*

节点数目的确定问题直接影响着网络的运行成本和工作效率，是传感器网络研究中一个基本的研究课题。介绍并分析了基于瞬时和长时两种不同感应模型的节点计算算法，即基于调度的节点数量确定算法和基于暴露量的节点数量确定算法，给出了覆盖滑动窗口的概念，归纳出两种算法在精度、性能指标和应用范围等方面的差异，得出两种方法均能有效确定满足覆盖节点数目的门限值，只是各自的覆盖滑动窗口的尺寸有所不同的结论。

Comparison between node number algorithms in wireless sensor networks

Use of the basic probability assignment function, the belief function and the plausibility function in evidence theory to describe and deal with the uncertainty of knowledge. This paper advised a specific probability assignment function and a new combination rule, and established a model of uncertain reasoning based on it. The example shows that the model can effectively measure the uncertainty of the final conclusions.