摘要
针对并行估计结构的无线传感器网络,讨论了无线传感器网络中的分布式估计问题,提出了一种能量有效的分布式估计算法,并对相应的功率分配问题进行了阐述。系统对于同一观测目标采用多发送单接收模式,由汇聚中心依据观测区域内的所有传感器节点发送的信息对观测对象做出估计,该算法基于LMMSE准则,考虑总能量受限和各支路信道状态信息两方面的因素,在满足一定系统性能要求的前提下,选定部分节点作为活动节点传输数据,并参与相应的功率分配,关闭未被选中的节点电源,从而实现有效地节能,进而延长无线传感器网络的生命周期。实验结果表明,该分布式估计的功率分配算法下的系统性能以及估计值的均方误差性能明显优于基于平均功率分配算法。
The compatible drive program of mouse and touch screen is designed for high reliable system in which mouse and touch screen can be used as input device at the same time.At first,the main idea of compatible driver design is intro duced in this paper,Then three functions which compose compatible driver are analyzed in detail.They are mouse drive program,touch screen interface function and its application interface function.The compatible drive program has been ap plied in ship control system successfully and it can be used in other similar application system too.
出处
《工业控制计算机》
2012年第9期60-62,共3页
Industrial Control Computer
