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For industrial wireless sensor networks, it is essential to reliably sense and deliver the environmental data on time to avoid system malfunction. While energy harvesting is a promising technique to extend the lifetime of sensor nodes, it also brings new challenges for system reliability due to the stochastic nature of the harvested energy. In this paper, we investigate the optimal energy management...
D-S evidence theory has been widely used in various fields of information fusion due to its efficiency in dealing with uncertain information. Unfortunately, combination of conflicting evidences with the classical Dempster's rule may produce the counter-intuitive results. In this paper, Definitions of correlation coefficient and credibility are first presented, followed by the introduction of evidence...
Drilling processes in the oil industry utilize directional measurement-while-drilling (MWD) instruments to provide realtime monitoring of the position and the orientation of the bottom hole assembly (BHA). This article aims at describing a system and method incorporated with solid-state vibration angular rate sensors(SVARS) and accelerometers for improving the surveying accuracy. These sensors are...
In this paper we focus on the concept of IEEE 802.11 DCF error frame model. Based on the analysis of the model in detail, we point out the error of the simulation algorithm of the DCF error frame model in QualNet simulation environment. Furthermore, we modify the simulation algorithm in QualNet strictly according to the specifications of the DCF error frame model. The simulation results show that...
Fusing out-of-sequence information is a problem of growing importance for multi-sensor target tracking systems due to sensors embedded in complicated network architectures. The problem of how to deal with these updates has received much attention in recent years and has been solved optimally and suboptimally by various authors. Most of the solutions treated only the problem of updating a track by...
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