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Traffic congestion has become a worldwide problem, seriously restricting the performance of transport network. Association of congested links is an essential factor in the formation of traffic congestion, while it lacks enough research. In this paper, a methodology ARM-K combining K-means clustering and association rules mining is proposed to discover the relations of congested links. Specifically,...
Using an existing large-scale realistic discrete event simulation model of a mobile distributed system we model the infrastructure and dependencies of 2G, 3G and 4G mobile data networks. We investigate the effects of the different network generations and of transitioning connections between networks on the typical behaviour of the distributed system. In particular we enable the model to simulate regional...
The European Electronic Toll Service (EETS) allows different possibilities for the overall system design of interoperable toll systems. We study the effect of the overall system design on the operational costs using a model based, holistic, executable specification. The model is set up to give an accurate description of the interdependences as seen in the German toll system. Two different scenarios...
With the rapid development of the wireless internet and mobile computing, more and more mobile-based services penetrate in business and personal life. Among them, LBS is one of the more significant services. So taken the multi-scale road network datasets in LBS as examples, this paper focuses on the multi-scale modeling, representation, and adaptive visualization for spatial data from the view of...
With the widespread use of PDAs, wireless internet, Internet-based GIS, 3G and 4G telecommunications, the technology supporting mobile GIS is rapidly gaining popularity and effectiveness. research on employing geographic data on mobile devices has received a substantial boost, due to the growing availability and increasing power of PDAs and cellular phones. However, a whole and general modeling and...
With the advent of pervasive systems and positioning technologies, a huge trajectory data related to moving objects is generated but not efficiently exploited by decision makers. Trajectory data warehouse seems to be a right repository for this kind of data. The aim of this work is to design a Trajectory data warehouse to gather trajectory data collected partially by mobile professionals for analysis...
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