Sökning: "railway"

Visar resultat 1 - 5 av 455 avhandlingar innehållade ordet railway.

  1. 1. Cybersecurity in Railway : A Framework for Improvement of Digital Asset Security

    Författare :Ravdeep Kour; Ramin Karim; Uday Kumar; Phillip Tretten; Adithya Thaduri; David Baglee; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cybersecurity; Framework; Railway; Operation and Maintenance; Railway Defender Kill Chain; Drift och underhållsteknik; Operation and Maintenance;

    Sammanfattning : Digitalisation changes operation and maintenance in railways. Emerging digital technologies facilitate implementation of enhanced eMaintenance solutions through utilisation of distributed computing and artificial intelligence. LÄS MER

  3. 2. Railway operation analysis : Evaluation of quality, infrastructure and timetable on single and double-track lines with analytical models and simulation

    Författare :Olov Lindfeldt; Bo-Lennart Nelldal; Lars-Göran Mattsson; Ingo Hansen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway operation; Railway capacity; Single-track; Double-track; Partial double-track; Inter-station distance; Delay; Delay propagation; Crossing; Overtaking; Timetable flexibility; Simulation; Experimental design; Civil engineering and architecture; Samhällsbyggnadsteknik och arkitektur;

    Sammanfattning : This thesis shows the advantages of simple models for analysis of railway operation. It presents two tools for infrastructure and timetable planning. It shows how the infrastructure can be analysed through fictive line designs, how the timetable can be treated as a variable and how delays can be used as performance measures. LÄS MER

  4. 3. Reforming a publicly owned monopoly : costs and incentives in railway maintenance

    Författare :Kristofer Odolinski; Jan-Eric Nilsson; Andrew Smith; Lars Hultkrantz; Marc Ivaldi; Örebro universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Railway track; Maintenance; Contract; Incentive reward ; Competition; Cost; Quality; Economic efficiency; J01 Railway: Railway track; J01 Railway: Railway track; J13 Railway: Economics; J13 Railway: Economics; Economics;

    Sammanfattning : The railway system is often considered to be an industry where a monopoly occurs “naturally”, which can explain the public ownership and the use of regulations. However, railways in Europe have been subject to reforms during the last three decades. LÄS MER

  5. 4. Railway Track Stiffness : Dynamic Measurements and Evaluation for Efficient Maintenance

    Författare :Eric Berggren; Mats Berg; Laurent Schmitt; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway track stiffness; maintenance; soil dynamics; measurement; simulation; vibration; Vehicle engineering; Farkostteknik;

    Sammanfattning : Railway track stiffness (vertical track load divided by track deflection) is a basic parameter oftrack design which influences the bearing capacity, the dynamic behaviour of passing vehiclesand, in particular, track geometry quality and the life of track components. Track stiffness is abroad topic and in this thesis some aspects are treated comprehensively. LÄS MER

  7. 5. Railway traffic disturbance management

    Författare :Johanna Törnquist; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Railway traffic; Transportation; Re-scheduling; Disturbance management; Decision support systems;

    Sammanfattning : With the increasing traffic volumes in many railway networks and reports on capacity deficiencies that result in insufficient punctuality and reliability, the need for efficient disturbance management solutions becomes evident. This thesis focuses on solutions that aim to minimise the consequences of disturbances for the various stakeholders and specifically on methods for re-scheduling the traffic. LÄS MER