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Wireless sensor networks (WSNs) consist of energy limited sensor nodes, which limits the network lifetime. Such a lifetime can be prolonged by employing the emerging technology of wireless energy transfer (WET). In WET systems, the sensor nodes can harvest wireless energy from wireless charger, which can use energy beamforming to improve the efficiency. In this paper, a scenario where dedicated wireless...
The lifetime of a wireless sensor network (WSN) is limited by the lifetime of the individual sensor nodes. A promising technique to extend the lifetime of the nodes is wireless energy transfer. The WSN lifetime can also be extended by exploiting the redundancy in the nodes' deployment, which allows the implementation of duty-cycling mechanisms. In this paper, the joint problem of optimal sensor node...
Traffic monitoring in urban transportation systems can be carried out based on vehicular sensor networks. Probe vehicles (PVs), such as taxis and buses, and floating cars (FCs), such as patrol cars for surveillance, can act as mobile sensors for sensing the urban traffic and send the reports to a traffic-monitoring center (TMC) for traffic estimation. In the TMC, sensing reports are aggregated to...
Traffic information is important for drivers and the traffic monitoring center (TMC) to avoid traffic congestions. VANET based systems use probe vehicles (PVs) to sense and upload the traffic information. However, due to the uneven distribution of the PVs, only a small part of the real-time traffic data can be gathered. Also, it is not efficient to estimate the traffic conditions at TMC and then publish...
This paper is concerned with the pursuit problem of indoor pursuit-evasion games (PEGs) with multiple pursuers and one fast evader. The system is implemented in multiple mobile robots with the ability of wireless communication. A model of the pursuit problem of fast evader in indoor PEGs is presented to consider the case that the exact position of evader is unavailable to the pursuers. To solve this...
High temperature air combustion provides the significant advantages of high thermal efficiency, reduced pollution, and low fuel consumption. The mathematical model for HTAC is built and the effect of oxygen concentration of entrancing chamber on combustion and NOx emission is investigated by using numerical simulation. In this paper, keeping the inleting oxygen concentration unchanged or unchanged...
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