计量学报2012，Vol.33Issue(2)：104-109,6.DOI:10.3969/j.issn.1000-1158.2012.02.02
基于分布式自适应偏转次梯度投影算法的气体源点定位研究
Research of Locating Gas Source Based on Distributed Adaptive Deflection Projected Subgradient Algorithm
摘要
Abstract
In view of gas source localization in wireless sensor networks, an adaptive projected subgradient method (APSM)is firstly introduced to estimate the gas source position. However, the APSM for locating is difficult to converge and consumes much time because of the concentrations corrupted by noise. So a distributed adaptive deflection projected subgradient method ( DADPSM)is proposed for modifying the iteration search direction and combing the characteristic of distributed calculation in WSN. Under the attenuation model of a gas source in the wind field, this algorithm could process the distributed information by DADPSM, the deflection subgradient direction is used in place of original gradient and the deflection subgradient projection hyperplanes is applied as the searching areas in the process of relaxed projection to achieve the gas source localization. Simulation proves that this algorithm can provide good convergence property, locate the gas source accurately, and save large amount of energy.关键词
计量学/气体源点定位/无线传感网络/次梯度/偏转Key words
Metrology/ Gas source location/ Wireless sensor networks/ Subgradient/ Deflection分类
通用工业技术引用本文复制引用
庄哲民,廖海龙,魏楚亮,李芬兰..基于分布式自适应偏转次梯度投影算法的气体源点定位研究[J].计量学报,2012,33(2):104-109,6.基金项目
国家自然科学基金(61070152) （61070152）
广东省科技计划资助(0711050600004) （0711050600004）
