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Methods to cluster fingerprints based on Smallest-Enclosing-Circle (SEC) and to modify Weighted-K-Nearest-Neighbor (WKNN) matching algorithm for indoor fingerprint positioning system are proposed. Based on the approach to computing the smallest k-enclosing circle, the method proposed clusters fingerprints in database by introducing reference points' coordinates, instead of their received signal strength...
A sensitive and simple liquid chromatography–mass spectrometry (LC–MS) method has been developed and validated for the quantification of solamargine, a steroidal glycoalkaloid, in rat plasma. Vincristine was selected as the internal standard. Sample preparation involved simple liquid–liquid extraction by ethyl acetate with high efficiency. The chromatographical separation was performed on a Shimadzu...
Currently, indoor location and navigation technology gives new requirements to spatial information model, however, nowadays the spatial model cannot meet this demand. Therefore, location and navigation electronic map of indoor large-scale venues based on GIS is designed, indoor spatial information model of the location fingerprints is created, and location and navigation data model is added to the...
For the weakness in the cluster head election of LEACH algorithm in Wireless Sensor Network(WSN),We propose an improved algorithm based on LEACH from point of view that regional energy balance of the network. Proposed algorithm can make the node that has more remaining energy to serve as the cluster head(CH). Meanwhile, when the sensor nodes choose the CHs, it will depend on not only the distance...
Sensor localization has become an essential requirement for realistic applications over Wireless Sensor Networks (WSNs). The complex indoor environment of large-scale buildings, however, makes localization with WSNs in the area very challenging. In this paper, a range-free approach named Approximate Point In Layer (APIL) is proposed. It bases on the principle of the layer in the three-dimensional...
This paper proposed the concept of LAGMS (large-scale architectural grid management and service) using the basic idea of SIMG (spatial information multi-grid), as well as the framework and construction of LAGMS system. Utilizing Internet, wireless communications technology comprehensively the system arranged the management processes, optimized the integration of various types of information resources...
For the goal of seamless indoor and outdoor location based services(LBS), a integrated navigation algorithm with both satellite location and WSN is put forward in this paper. This paper also design semi- physical simulation platform based on software receiver structure, which integrate GPS receiver and WSN nodes. Pseudorange observation data of global positioning system (GPS) and distance observation...
An intelligent fault diagnosis model of wireless sensor networks (WSN) using rough set and artificial neural network ensemble (RS-ANNE) is developed to solve the fault diagnosis problems of WSN such as limited energy and substantive information redundancyiquestthus prolonging service life of the whole WSN effectively. The attribute reduction for decision of fault diagnosis is utilized based on the...
A data aggregation routing protocol with minimum transmission cost spanning tree facing the problem of low-power routing was proposed, to lower energy consumption of wireless sensor networks. Data from sensor nodes was transmitted to the root node to sink node within the same sensor area. Data aggregation and transmission to the in-network sink along the shortest path is in accordance with principles...
An integrated location algorithm using satellite location and wireless sensor networks (WSN) is put forward to solve the issues of seamless location both indoors and outdoors in a pervasive computing environment in this paper. Pseudorange observation data of global positioning system (GPS) and distance observation data of WSN are utilized to carry out positioning. Simulation results show that comparing...
A data organization and access mechanism model of the spatial information grid is developed for effectively solving the spatial information share in pervasive computing environment. An architecture of campus location-based services based on grid geographical information system (CLGG) is proposed for services sharing, which composed of location tier, data tier, service tier and application tier. In...
Traditional global positioning system (GPS) is not suitable for indoor location environments. A wireless sensor network (WSN)-aided GPS location algorithm is put forward in this paper in order to realize seamless connection between indoor and outdoor locations and shorten search and acquisition time of GPS signal. The algorithm utilizes auxiliary location information obtained from GPS reference station...
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