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Showing result 1 - 5 of 384 essays matching the above criteria.
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1. State of Health measuring of NiMH batteries using simple electronic components.
University essay from Linköpings universitet/FordonssystemAbstract : The possibility of measuring the state of health of a NiMH battery without doing it in a lab is evaluated, the goal was to see if it was possible to perceive any differences between batteries of different states of health and whether it’s worth further exploring this solution in a more detailed manner. In order to try and extract and analyze the state of health of the batteries a series of tests consisting of discharging batteries at different lengths of times and different resistive loads were made, the voltage of the batteries being captured by a multimeter. READ MORE
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2. Value at Risk Estimation using GARCH Family Models: A Comparison of Different Specifications and Distributions.
University essay from Göteborgs universitet/Institutionen för nationalekonomi med statistikAbstract : The objective of this study is to compare the performance of different GARCH models, under various conditional distribution assumptions, to predict one-day-ahead Value-at-Risk (VaR) for three stocks: Swedbank, Handelsbanken, and SEB over the Covid-19 period. The performance is evaluated using Kupiec, Christoffersen tests and the Quadratic Loss. READ MORE
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3. Dynamic axel load estimation for an electrified vehicle : Normalkraftestimering på drivaxeln
University essay from Linköpings universitet/Institutionen för systemteknikAbstract : The brake system is critical for ensuring safe driving and has been the focus of development for many years. Pneumatic braking technology is commonly used in heavy vehicles,but it results in energy wastage and high service costs. Some countries mandate auxiliarybraking systems to assist in stopping the vehicle in addition to service brakes. READ MORE
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4. Tribological characterization of a ball bearing subjected to an electric field : Electric drivetrain tribology
University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematikAbstract : Electric machines are widely used in for instance the automotive industry in electric vehicles and in wind turbines. The electrical machines have mechanical bearings as an integral part used to transmit power and load. In addition, the main function includes reducing friction between interacting surfaces. READ MORE
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5. Information Extraction for Test Identification in Repair Reports in the Automotive Domain
University essay from Uppsala universitet/Institutionen för lingvistik och filologiAbstract : The knowledge of tests conducted on a problematic vehicle is essential for enhancing the efficiency of mechanics. Therefore, identifying the tests performed in each repair case is of utmost importance. This thesis explores techniques for extracting data from unstructured repair reports to identify component tests. READ MORE