Search for dissertations about: "impact noise"
Showing result 21 - 25 of 267 swedish dissertations containing the words impact noise.
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21. InP High Electron Mobility Transistors for Cryogenic Low-Noise and Low-Power Amplifiers
Abstract : The InAlAs/InGaAs/InP high-electron mobility transistor (InP HEMT) is the preferred low-noise device in cryogenic low-noise amplifiers (LNAs) operating at 5-15 K. Such LNAs are utilized in microwave and millimeter-wave detection in radio astronomy. READ MORE
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22. Study of Supersonic Jet Noise Reduction using LES
Abstract : Increases in air traffic and denser population around airports have led to stricterregulations on aircraft noise. High noise levels from high-speed aircraft can causehearing damage in pilots and the airfield personnel. The engine is the main sourceof noise of all jet aircraft and is therefore a key component for improvement. READ MORE
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23. Improving the Performance of Machine Learning-based Methods for Continuous Integration by Handling Noise
Abstract : Background: Modern software development companies are increasingly implementing continuous integration (CI) practices to meet market demands for delivering high-quality features. The availability of data from CI systems presents an opportunity for these companies to leverage machine learning to create methods for optimizing the CI process. READ MORE
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24. Physics-based Modelling for Aircraft Noise and Emission Predictions
Abstract : Starting from semi-empirical noise source models for the aircraft and 4D trajectory computations, this work focuses on the environmental assessment of scenario studies regarding technology evaluation and procedural planning. Extensive work was performed on improving and validating the existing tools. READ MORE
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25. Active suppression of vibration and noise in industrial applications
Abstract : Today, active control technology is about to emerge from the research labs into products in various areas. It has become an attractive method where passive techniques have low impact at low frequencies and adding active control to that part is often an attractive solution. READ MORE