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To improve the localization accuracy of wireless sensor networks (WSNs) node for underground tunnel monitoring, we propose a method to improve the localization accuracy of Received Signal Strength Indication by using the anchor node selection mechanism, which is based on the three-dimensional space characteristics of the mine and the choice of the wireless communication frequency. Firstly, we sort...
Aiming at the problem that the 3D DV-Hop localization algorithm has great error in the location of coal mine roadway, an improved three-dimensional DV-Hop fixed node location method is proposed based on the relationship between the geometric model of coal mine roadway and the sensor node. Based on the traditional 3D DV-Hop calculation hops and the lack of distance between nodes, the difference method...
In view of the error problem resulting from the approximate calculation when there is only a hop distance between anchor node and location node in the DV-Hop algorithm of wireless sensor network, this article introduces the RSSI ranging technology on the basis of original algorithm. Using RSSI ranging technology, we can know whether the anchor node is only a hop away from the location node, and then...
According to the floatation processing characteristic with time-variation, uncertainty and complicated nonlinear relations, a prediction method of concentrate grade and prediction model of ore dressing date is proposed. This article establish a prediction model of ore dressing date based on Jordan neural network including input of influence factors and dynamic time sequence feedback of concentrate...
Mining the interesting function from the very complex and large data sets is an important research direction in DM and KDD. Traditional methods depend on experience and professional knowledge and involve subjectivity and blindness when determine function type and can not work well with complex function expression. Gene expression programming (GEP) is an adaptive genotype/phenotype evolutionary algorithm...
Nowadays, power management semiconductor suppliers have taken big steps to provide environmentally sound and green product solutions to meet the ever increasing demand of high performance electronics in the global consumer, industrial, computer, communication and automotive markets. The challenges are two fold. Very strict reliability performance and the green requirements have to be met at the same...
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