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Li C.,Sichuan University | Li C.,Wuhan University | Li C.,National Key Laboratory of Air Control Automation System Technology | Zhang B.,Sichuan University | And 6 more authors.
Beijing Youdian Daxue Xuebao/Journal of Beijing University of Posts and Telecommunications | Year: 2015

The traditional trajectories compression methods handle each trajectory individually, but it does not take into account the actual route situations, so it shows limited space performance. To solve this problem, the route network model is designed, and regulations of these trajectories are deeply explored. The main contributions include: 1) proposing the distance measure SRTD (shadow reference trajectory distance) which incorporates the space and time information of trajectories together; 2) proposing an algorithm called SDTC (SRTD distance based trajectory compression), which compresses dual-layer trajectories based on SRTD distance similarities. Experiments show that, compared with traditional methods, SDTC algorithm significantly reduces the storage consumption, and is of good precision. ©, 2015, Beijing University of Posts and Telecommunications. All right reserved.

Yang S.,Sichuan University | Li C.,Sichuan University | Li C.,National Key Laboratory of Air Control Automation System Technology | Tang C.,Sichuan University | And 3 more authors.
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | Year: 2012

In order to improve the efficiency of traditional algorithms in aerospace information network hub finding, the idea of inter-unit hub node mining was proposed, the algorithm for detecting inter-unit hub nodes was designed and implemented. Experiments was taked to test the time, space efficiency, scalability and effectiveness of the algorithm was analyzed.

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