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In order to improve the location accuracy in the complicated greenhouse environment, a positioning system is designed in this paper. According to RSSI data in the greenhouse, the parameters of the path-loss model are modified. Besides, least square estimation is used to filter RSSI data to eliminate random disturbance. Based on RSSI, the blind node is positioned by triangle centroid location method...
In order to meet the requirements of data fusion for greenhouse monitoring system based on wireless sensor network. A kind of multi-sensor data fusion structure model about spatial and temporal fusion is proposed. According to the greenhouse environment parameters such as temperature, humidity, CO2 change slowly, while the parameter of sunlight changes rapidly, this paper proposes that it respectively...
Wireless sensor networks have been extensively adopted in numerous application scenarios. However, increasing environmental constraints and performance requirements has spurred the development of tools to expedite deployment and minimize human intervention. This study extends previous work by the authors in network development and aims at the performance evaluation of applications operating in to-be-deployed...
Wireless sensor networks (WSNs) have been extensively researched recently. This paper makes two contributions to this field. First, we promote a new concept of long-thin (LT) topology for WSNs, where a network may have a number of linear paths of nodes as backbones connecting to each other. These backbones are to extend the network to the intended coverage areas. At the first glance, a LT WSN only...
Although we can use telecomm technologies such as MMS to access various services, right now we do not have a good method to access several services at a time. In this paper, we propose a service-based P2P mobile sensor network (SPMSN) architecture. It allows users to adopt an integrated method to access various services even these services are not in the same physical network. An efficient communication...
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