Recently, there is an increasing yet challenging demand on broadband mobile communications for high-speed trains. In this article, cognitive Doppler spread compensation algorithms are proposed for high-speed rail broadband mobile communications, which make use of the dedicated radio environment map (REM) for railway to compensate the time-varying Doppler spread. The dedicated REM for high-speed...

the purpose of this study is to investigate the effect of injection parameters on a heavy duty diesel engine performance and emission characteristics. in order to analyze the injection and spray characteristics of diesel fuel with employing high-pressure common-rail injection system, the injection characteristics such as injection delay, injection duration, injection rate, number of nozzle hole...

the vibration of cable-stayed bridges subjected to the passage of high-speed trains is studied in this article. the moving train includes a number of wagons, each of which is modeled as a four-axle system possessing 48 degrees of freedom. the car model is nonlinear and three-dimensional and includes nonlinear springs and dampers of primary and secondary suspensions, dry friction between differe...

Since its early days the development of railway systems has been an important driving force for technological progress. From the 1840s onward a dense railroad network was spread all over the world. Within a few decades railway became the predominant traffic system carrying a steadily increasing volume of goods and number of passengers. This rapid development was accompanied by substantial devel...

BRT appears to be less expensive to build and operate than tram systems but can it really approach the performance level of a tram system and what is the environmental performance of comparable systems? This paper reports systematic research on these issues, particularly relating to where an urban transit system seeks to attract discretionary car users. A model has been developed to compare the...

We investigate the integration of scheduling for a rail system and some of the operations in a coal terminal system, based on representative data. The rail and terminal systems are tightly-coupled and experience a high service demand from the expensive infrastructure. This makes efficient operations essential. However no central authority is in a position to effectively create global schedules ...

Safety is a high priority for any rail system, and there are several safety concerns associated with operating passenger and freight trains on shared-use rail corridors. Adjacent track accident (ATA) is one of the most important concerns. ATA refers to train accident scenarios where a derailed equipment intrudes adjacent tracks, causing operation disturbance and potential subsequent train colli...

In the manufacturing line, there is a material handling system which transfers an item from one machine to other machine. One of the simplest material handling systems is RGV(Rail Guided Vehicle) system. In this system, RGV moves only backward and forward on the guided rail and it executes the job which consists of two location information; 'From location', 'To location'. When the RGV gets a jo...

This paper analysis the current situation of Chinese Railways (CR), the progress of reforms in future, and possible future developments, the purpose to give a new integrate rail-post package distribution system in China. Based on it, this paper proposed a new approach of supply chain time-cost modeling. The first section describes the current research and problems. Integrated rail-post package ...