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This paper analyses the trade duration of HS300 index ultra-high frequency data using ACD model. First, we research the amplitude characteristics of the volatility in spatial direction, and analyze the density characteristics of the volatility in time axis. Then from the angle of the three-dimensional we make a comprehensive analysis on high frequency data in space and time. Finally, by constructing...
Reliable and real-time location information is important for location-based services (LBS) of the mobile terminals. Existing location techniques have poor performance in urban environments due to severe multipath and NLOS propagation. Fingerprint localization based on wireless-LAN (WLAN) has been preferred for those types of environments. However, the most challenge in fingerprint positioning is the...
This paper aims to investigate the internal developing mechanism of a port cluster system. It was proved that a regional port cluster is a typical dissipative structure system, which presents the characteristics of openness, non equilibrium, non linearity and stochastic fluctuation. Considering the port cluster system is a continuous time system, we established the basic evolutionary equations according...
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