Search for dissertations about: "railways systems"
Showing result 1 - 5 of 44 swedish dissertations containing the words railways systems.
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1. Congested railways : influence of infrastructure and timetable properties on delay propagation
Abstract : In this thesis the symptoms and underlying behaviour of congestion on railways are analysed and discussed. As well as in many other countries, Sweden faces increasing demand for transport. To meet this new demand, railways play an important role. READ MORE
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2. Efficiency of the trackwork scheduling process in Sweden
Abstract : Efficient scheduling is vital for railway maintenance, which is increasingly challenged by rising train traffic and infrastructure wear. Trackwork often necessitates the reduction of train speeds and the partial or complete closure of tracks. READ MORE
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3. Simulation Studies for Improved Efficiency in Road and Rail Freight Transports
Abstract : The demand for road and rail freight transport continues to grow with the expanding economy, while the climate crisis requires reduction in greenhouse gas emissions. Therefore, tools and solutions for reducing fossil fuel use and enabling more efficient use of infrastructure are needed. READ MORE
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4. EMC in railway systems : measurements, modeling and analysis
Abstract : The subject of this study and resulting thesis was to investigate the electromagnetic compatibility (EMC) problems in the multi-electrical signaling circuitry along a railway track. These signaling systems have been expanding over time from buried multi-wired electrical copper cables to optical fiber cables, sometimes located parallel to the contact line in the catenaries. READ MORE
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5. The Influence of Customer Agreements and Planning Principles on Rail Freight Performance
Abstract : Rail freight transportation is recognized worldwide as a suitable transportation mode when it comes to long haul transportation of heavy commodities. The industry is also known to be capital intensive, highly dependent on infrastructural developments and requires thorough planning of operations. READ MORE