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Feng G.,Xian Railway Vocational and Technical Institute
Journal of Convergence Information Technology | Year: 2012

This paper proposes a method to improve the profile and eliminate the shadow and noises. First identify the changing area of the moving target by using difference of five-frame grads image and then perform "or" computing with the results obtained by the background difference method to get the complete profile of a moving target. We analyze the feature of the shadow in HSV color space to eliminate the shadow and eliminate the noises by the distribution features of the noises. The processing results indicate that the processing speed is 20ms/frame and the real-time requirement is met. The obtained moving target eliminates the shadow and noises and is very robust. Source


Tan X.R.,Xian Railway Vocational and Technical Institute
Advanced Materials Research | Year: 2014

With the transformation of China's urbanization and accelerated pace of urban agglomeration, increasing construction waste has brought the conflict between the development of urban and environmental degradation. To use recycled aggregate(RA) to a certain extent eased pollution on the environment. Because of the source of RA cause exist quality poor stability, dispersion and other shortcomings. By test, comparative analysis the differences indicators between recycled aggregate and natural aggregate, brick gravel content of recycled coarse aggregate performance indicators in particular made a crushing value performance test. As the research properties of recycled aggregate and adapted to the local grading standards provide a frame of reference. © (2014) Trans Tech Publications, Switzerland. Source


Xu X.,Xian Railway Vocational and Technical Institute
ICTE 2011 - Proceedings of the 3rd International Conference on Transportation Engineering | Year: 2011

According to features of the high speed railway and based on accident-causing theory, the influence factors and construction goal of high-speed railway security system were analyzed from human, machine and operation environment, the three-level security system of high-speed railway was constructed using system engineering. Moreover, function of high-speed railway security information system as well as structure and function of disaster prevention safety monitoring subsystem were analyzed. In order to ensure reliability of high-speed railway security system, long-effect mechanism should be taken to be the breakthrough point, as strong motivation and hard constraint to worker for improving work quality. Fundamentally strengthen the equipment quality to improve equipment reliability and finally ensure security. © 2011 ASCE. Source


Liu X.Q.,Xian Railway Vocational and Technical Institute
Applied Mechanics and Materials | Year: 2014

Aggressive train signal belongs to typical accidents in the process of train running; it has many influence factors, widely related departments and complex results. In this paper, we carry on the qualitative and quantitative analysis on the typical accidents using FTA technology, to estimate and calculate the structure, probability and critical importance degree. The affecting factor of the typical accident to analysis deeply. Then the analysis conclusion is carried out and the prevention strategies of the typical accident are given. © (2014) Trans Tech Publications, Switzerland. Source


Miao B.,Southwest Jiaotong University | Miao B.,Xian Railway Vocational and Technical Institute | Tong X.,Southwest Jiaotong University
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2012

A reconfiguration scheme of protection logic and virtual interaction among protection equipments based on IEC 61850 is proposed. The protection logic nodes (LNs) in IEC 61850 have been encapsulated into the components by reference to IEC 61131-3. The traditional protection logic modules are designed as LN internal function blocks, and the signal interfaces are defined with the LN data of IEC 61850. The internal protection logics of protection LN components, the coordination among LNs as well as the virtual interaction relationships among devices with distributed function are described. The virtual connections among devices are added and the virtual input/output information of protections is constructed. Using the XML language, the configuration and interaction information for reconstructed protection devices are described. The design examples given show it is feasible. The new scheme can promote development and management of protection device; as well, it also gives some valuable supplements for the system configuration. © State Grid Electric Power Research Institute Press. Source

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