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Accurate and safe train position determination is of great importance for railway systems. Additionally, it has become one of the biggest challenges for the Safety-of-Life (SoL) services in railway transport systems using GNSS techniques. The critical performance requirements of these services promote the users to develop safe Train Positioning Systems (TPSs), in which integrity has to be highly concerned...
Safe train localization is the key element to provide reliable Position, Velocity and Timing (PVT) information for Automatic Train Operation (ATO), and will enable future applications such as moving block, real-time safety margin estimation for adjacent trains, and many more. The safety-assured train localization under many repeated tests along the test railway line providing acceptable performance...
The cooperative vehicle localization using DSRC (Dedicated Short Range Communication) is of great significance in many future transportation applications. An overlay function of DSRC has been explored with vehicular communication and it is with great potentials to achieve accurate and reliable vehicle cooperative localization with assistance from the GNSS (Global Navigation Satellite System) receivers...
In order to reduce the possibility of crew suffering from various injuries, quantitative marine individual risk model is adopted to improve the original Risk Matrix. Improved Risk Matrix quantizes the limit frequency and injurious consequences corresponding to the severity of the accident, thereby it reduces the ambiguity of Risk Matrix. Using the falling accident as example, this paper demonstrates...
Based on the exploration and development of Train Collision Early Warning System (TCEWS), the safety assurance overlay for high-speed train operation over the railway signaling system is becoming a reality in China. As the rapid development of BeiDou Navigation Satellite System (BDS), availability of precise and effective satellite navigation encourages a revolution in railway transportation system...
With rapid popularization of IPv6 network, network security has become one of the main factors which can impact the development of IPv6 network. DDoS(Distributed Denial of service) attacks are the leading thread to the Internet. In this paper, firstly the security of IPv6 protocol and DDoS attacks are introduced. Then, two main security applications based on IPv6 campus network are introduced. Finally,...
Data fusion algorithm is an important guarantee about the performance level and complete function of the train positioning system. Since conventional Kalman filter methods in GNSS/INS integration frame could not solve the problem of nonlinear model. In this paper the Gaussian particle filter (GPF) is introduced, which is an efficient variant on the particle filtering algorithm for nonlinear hybrid...
This paper explains connotation of the electric grid security from different angles; discusses the importance of electric grid security in our production, daily life and the national economy development; analyzes inherent and external reasons which brings about accidents, then summarizes factors that influence the electric grid security.
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