Papers by Keyword: Track

Abstract: There is a need for railway systems and upgrade their infrastructure to meet the future growing demand. This would expand the railway network by planning new track routes to increase the efficiency of railway transportation by running behavior of high train speeds between urban cities. The track/ballast; sleepers; and subgrade foundation system are important superstructure parts that need to be upgraded and improved to withstand high train speeds. A numerical finite element technique significantly benefits in simulating the impact of the dynamic response and predicting the deformation and stress distribution in the railway ballasted system. A three-dimensional finite element program PLAXIS ver. (20) have been utilized in this research to analyze the track of complex behavior under train loading. The vertical displacement of 3.8 mm was obtained at the rail/wheel contact point and greater than at the ballast embankment by about (19%) and (37%) for the subgrade foundation. Also, the maximum value of vertical displacement corresponds with the movement path of the train load is reduced laterally as the distance from the track centerline increases. The maximum vertical acceleration of 15.2 m/s² was obtained at surface points under track loading and decreased gradually with increased depth below the ballast embankment layer to reach a minimum value of 1.2 m/s². The vertical deformation was 1.3 mm, 2 mm, and 3.9 mm for 40 km/hr, 50 km/hr, and 60 km/hr respectively, and increased rapidly to 15 mm for train velocity greater than 70 km/hr due to the significant increase in train vibration level at higher speed. A critical train speed of 70 km/hr was observed that promoted the level of vibration and magnified the area of influence.

Abstract: This paper presents the negative effects of the vibrations produced by railway transport systems upon the constructions in the neighbourhood of the railways. The railway vehicles in motion produce very high intensity vibrations. Through the soil, these vibrations are transmitted to the foundations of the constructions in the vicinity and consequently settlements, cracks, even collapses of buildings can occur. The paper contains a theoretical part where the features of free and forced vibrations of the track/vehicle system as well as the features of the vibrations of the vehicles displacing along a joint track are described, followed by a practical part in which are shown the results of measurements made to highlight the effects upon the constructions (values of accelerations, velocities and displacements).

Abstract: For multi-target radar track Extraction, the paper proposed a multi-regional threshold method, by setting a plurality of parameters threshold, to determine whether the next time point falls within the threshold based on relevant criteria, then to build the track; further proposed satisfaction law, track was established by the relevant observation points, which the satisfaction function is defined between the associated trace points and set it to the threshold, Through the case of simulation, the model results are given in comparison.

Abstract: According to the characteristics of the moving target state information, we propose a multi-mode adaptive CamShift algorithm (MACA), and using the adaptive algorithm designed a real-time tracking system. The large number of experiments show that the algorithm robustness, real-time, high degree of system automation.

Abstract: In this paper it was performed curve negotiation analysis of three axle bogie of locomotive type JŽ 461. This locomotive has large distance between first and middle i.e. middle and last axle, which leads to increased lateral forces during curve negotiation. Final result might be widening of track gauge in curves with small radius. This paper points that Infrastructure Manager must take into account vehicle performances and type of track when defines track gauge in curves.

Abstract: Because uncertainty and complexity of the athlete’s injury risk factors, the general risk method can’t reflect the risk of athletes. Based on Bayesian probability estimation method, this paper proposes a new evaluation system of athlete injury risk. Combined with the VB programming and visualization display function, it realizes visual evaluation function of athlete injury risk, and the injury level of athletes is divided into three warning levels. Finally through risk assessment system, we get the effect curve of athletes training number and training time on the injury. From the results we can conclude that the training time has a certain randomness injury to the athletes, and training times are decisive factors to some injury of athletes. It provides technical reference and data support for the risk assessment of injury.

Abstract: Mobile computing environment is relatively complex environment. This paper uses the optimization mathematical model step by step to improve the mobile computing algorithm, and improves the interoperability of mobile computing. And we introduce this model into the starting transient dynamics analysis for athletes, and establish the analysis system of starting transient force and speed. In order to verify the validity and reliability of the system, we use Web development platform to test the system, and use the VC software to calculate the maximum speed of athletes in different pedal angles. Through calculation we find, the instantaneous speed of athletes is different with different pedal angel. When the pedal angle is 45 degrees, the speed of athlete is faster than that in 30 degree and 60 degree. It provides the technical reference for the research on athletes starting running optimization scheme.

Abstract: The objective of this paper is a generalization of printed media publications and publications of polymeric insulations’ manufacturers with a view to distinguish strengths and weaknesses of polymeric insulation, summarize experience in application of polymeric insulation and if possible to observe a tendency of its further development.

Abstract: This paper puts forward a complete track forecasting models, using Kalman filter to track and predict the movement of objects without prior knowledge. Use the extracted Harris corner to calculate optical flow between two frames by L-K pyramid method, getting the convex hull of moving objects by optical flow clustering to separate the moving objects from background. Tracking and predicting the gravity of moving objects convex hull can solve the occlusion and separation problem between moving objects. Computer simulation and field test results show that the proposed method has higher tracking accuracy, and small amount of calculation.

Abstract: By using the adaptive search algorithm of particle swarm layout, we optimize 3D space nodes of wireless network, and obtain the optimum mathematical model of particle swarm optimization distribution of nodes in wireless network. Using the tree structure and the wireless network hardware equipment we design algorithm the optimization platform of track and field technique. In order to verify the stability and reliability of platform running, we use the wireless network node division method and transmission time groups of control network to control athlete’s technical movement. And we use Java technology to calculate the athlete’s action to verify the stability. Through calculation, for the same optimization task, the time of adaptive search algorithm is short, and the search is less, which is a rapid and effective optimization algorithm.