Search for dissertations about: "Hjul"
Showing result 1 - 5 of 11 swedish dissertations containing the word Hjul.
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1. Railway Open System Tribology
Abstract : Tribology in the railway system is of increasing interest in the new railway era due to the demand for higher speed and load capacity. Since railway vehicles operate in an open environment, their performance depends greatly on temperature, humidity and natural and artificial contaminants. READ MORE
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2. Languages and Tools for Optimization of Large-Scale Systems
Abstract : Modeling and simulation are established techniques for solving design problems in a wide range of engineering disciplines today. Dedicated computer languages, such as Modelica, and efficient software tools are available. In this thesis, an extension of Modelica, Optimica, targeted at dynamic optimization of Modelica models is proposed. READ MORE
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3. Harmonic Mitigation in Traction Drives
Abstract : In railway traffic the low friction between wheel and rail causes long braking distances, normally much longer than the sight distance of the driver, i.e. if the driver starts the braking when a problem on the track is discovered, it might be too late to brake the train. Therefore, safe railway traffic can not only rely on the driver. READ MORE
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4. Evaluation of wayside condition monitoring technologies for condition-based maintenance of railway vehicles
Abstract : Luossavaara-Kiirunavaara AB (LKAB) is an iron ore mining company in Sweden that strives to be one of the leading suppliers of iron ore products. In the chain from mining to end customers, transportation efficiency plays a mayor role in the outcome of the company's total financial result. READ MORE
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5. Stroke and Functional Recovery - An experimental study on environmental influence and gene expression after cortical infarcts in the rat
Abstract : Abstract Stroke is the third leading cause of death in the western world, and the number one cause of disability. 85% of all strokes are ischemic. Most stroke survivors will experience recovery of function. The mechanisms behind this improvement are partly unknown, but may involve elements of both compensation and restoration. READ MORE