Search for dissertations about: "Frequency"
Showing result 1 - 5 of 5086 swedish dissertations containing the word Frequency.
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1. The Frequency of the Frequency : On Hydropower and Grid Frequency Control
Abstract : Variations in the electricity consumption and production connected to the power system have to be balanced by active control. Hydropower is the most important balancing resource in the Nordic system, and will become even more important as the share of variable renewable energy sources increases. READ MORE
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2. Pitch, loudness and frequency selectivity in low-frequency hearing loss
Abstract : Patients with Ménière's disease and cochlear hydrops show fluctuating low-frequency hearing loss (FLFHL). At present these changes are followed as patients' subjective reports and occasional measurements. READ MORE
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3. Integration of Non-synchronous Generation - Frequency Dynamics
Abstract : Traditionally the predominant generation has been large synchronous generators providing the system inertia. Nowadays when wind power and other non-synchronously connected units displaces this synchronous generation, the system inertia is reduced. Hence higher rate of change of frequency and larger frequency deviations are expected. READ MORE
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4. Graphene field-effect transistors for high frequency applications
Abstract : Rapid development of wireless and internet communications requires development of new generation high frequency electronics based on new device concepts and new materials. The very high intrinsic velocity of charge carriers in graphene makes it promising new channel material for high frequency electronics. READ MORE
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5. Low frequency noise during work. Effects on performance and annoyance
Abstract : Aims. Low frequency noise (LFN) is defined as "a noise with a dominant frequency content of 20 to 200 Hz". Common sources of LFN in occupational environments are ventilation, heating and air-conditioning systems, computer network installations and compressors. READ MORE