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Network node positioning technology is one of the important supporting technologies in the practical application of wireless sensor. In order to overcome the measurement error of the least squares method for wireless sensor networks (WSNs) node affect their positioning accuracy, an improved positioning algorithm least squares(LS) is proposed. In order to obtain the optimal reference node, the algorithm...
As one of the wireless communication technology, Ultra-Wide Ban(UWB) technology will be applied more in position in future for its advantage of high-speed, low-cost and low-power. The paper introduce the basic concept of UWB technology and the thing of domestic and foreign study. the current situations and problems of the emergency materials warehouse is analyzed. the paper put forward the assumption...
According to the temperature measurement requirements for the ceramic kiln, an automatic temperature measurement system is developed using wireless communication technology. It overcomes the disadvantages of wired measurement system, such as complicated wiring and difficult maintenance. The hardware and software of the measurement system are discussed in detail. The temperature measured by the thermocouple...
According to the environmental parameters monitoring requirements in greenhouse, a wireless measurement and control system for temperature and humidity is developed. It overcomes the disadvantages of wired monitoring system, such as complicated wiring, and difficult maintenance. The environmental parameters in every greenhouse were measured and controlled by microcontroller. The hardware and software...
Wireless sensor networks can be used in industrial applications to overcome some limits of wired fieldbuses. This paper proposed a reliable wireless communication protocol (RWCP) for industrial applications. Protocol design focused on network reliability and power consumption. Reliability was improved by creating redundant links dynamically. Deterministic communication was provided through super frame...
Wireless data acquisition has been applied in lots of areas. Foreign scholars and engineers referred and designed many methods of wireless data acquisition system. The independence and singularity of the wireless data acquisition technique conduct that it can't meet the requirements of manufacture system. This paper starts from the introduction of the status of wireless data acquisition system and...
Fixed spectrum frequency assignment problem, known as a NP-hard problem, is frequencies available are fixed and the goal is to minimize the interference due to the reuse of frequencies. The problem is still very important in wireless communication networks. An improved heuristic method, tabu search with a special data structure named single-frequency violation and an initialization strategy along...
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