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The passive wireless surface acoustic wave (SAW) sensors are advantageous for the applications under harsh environmental conditions. The wireless transmission poses great challenges in the measurement quality due to the passive SAW sensors have no signal processing ability. This paper proposes a method to predict the measurement quality. The proposed approach is evaluated in simulations and practical...
Recent works have developed a simple and robust myopic sensing policy for multi-channel opportunistic communication systems where a secondary user (SU) can access one of N i.i.d. Markov channels. The optimality of the myopic sensing policy maximizing the SU's expected accumulative reward is established under certain conditions on channel parameters. This paper studies the scenario where the SU, equipped...
Tire pressure monitoring system can monitor the real-time tire pressure of vehicles, and give an alarm when tire is at exceptional state to ensure the safety of driving, which is the life safeguard pre-warning system for drivers and passengers. A tire pressure monitoring system based on wireless sensor networks technology which is described in this paper and the hardware structure is also be put forward...
BACnet (building automation and control networks) is a standard data communication protocol for building automation and control systems. BACnet adopts master-slave/token-passing (MS/TP) as one of its local area networking options. The MS/TP protocol is designed specifically for building automation and control systems. In this paper, the authors firstly analyze the feasibility of MS/TP protocol used...
Localization is one of the imperative issues in wireless sensor networks. The classical range-free and range-based localization algorithms have respective pros and cons, which cannot gracefully meet the practical requirements, such as the heterogeneity of network and irregular distribution. Thus, the high-accuracy localization algorithm HILS (hybrid iterative least square) is proposed in this paper,...
The energy conservation is the intrinsic issue of the wireless sensor network (WSN). The lack of energy of some necessary sensor nodes will affect the accurate data aggregation as well as the effective lifetime of the network. In this paper, the problem of predicting which energy level the WSNs or nodes stay in is addressed. Since the primitive method that exchanges messages through nodes could not...
With the advances of MEMS, low-power analog and digital electronics, and low-power RF design, the design of wireless sensors has been developed rapidly. The advances of wireless sensors have enabled wireless sensor networks which are deployed to collect useful information from an area of interest. Because of the energy restriction of wireless sensors, the problem to extend the lifetime of wireless...
Wireless sensor networks (WSN) have become possible because of the on-going improvements in sensor technology. As the development of WSN, the problem about WSN is growing up. Sensor nodes localization is the importance a new research point. Getting the smallest location error in nodes localization is the final goal. Many works in literature propose schemes and methods for localization in wireless...
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