Essays about: "range margins"

Showing result 21 - 25 of 29 essays containing the words range margins.

  1. 21. Design of an Alternative Frequency Controller for Hydropower Stations : Reducing the 60-second Floating in the Grid Frequency of the Nordic Power System

    University essay from Uppsala universitet/Avdelningen för systemteknik

    Author : Camilla Odelbrink; [2014]
    Keywords : hydropower; frequency controller; frequency floating; lead lag;

    Abstract : A periodic oscillation in the grid frequency of the Nordic power system has been observed. The oscillations, also denoted as a floating, have periods of about 60 to 90 seconds. The reason for the floating is not fully known, and the strength of the floating has been increasing during the last years. READ MORE

  3. 22. Trim optimization of reefer vessels

    University essay from KTH/Marina system

    Author : Leif Reinius; [2014]
    Keywords : ;

    Abstract : The influence of trim on the fuel consumption of reefer ships have been investigated. The project have been carried out at NYKCool AB, a ship operator of reefer vessels. READ MORE

  4. 23. Evaluation of soft-tissue match methods for utilization in CBCT guided adaptive radiotherapy of lung cancer patients – clinical benefits, limitations and margin determination

    University essay from Lunds universitet/Medicinsk strålningsfysik, Lund; Lunds universitet/Sjukhusfysikerutbildningen

    Author : Fatma Rahma; [2014]
    Keywords : Medicine and Health Sciences;

    Abstract : Purpose: The aim of this study is to a) study the benefits and limitations with soft-tissue match for lung cancer patients, b) evaluate five different soft-tissue match methods, c) compare soft-tissue with bony match, d) find the stable surrogates to match on for obscured malignant lymph nodes, e) calculate CTV to PTV and OAR margins and volume of PTV for the corresponding margins, and d) study the anatomical changes associated with radiotherapy for lung cancer. Material and methods: 23 lung cancer patients (16 NSCLC, 7 SCLC) treated with radiotherapy, with 135 weekly CBCT set-up images were retrospectively matched to the planning CTs by five different match methods using the registration software Offline Review, version 10. READ MORE

  5. 24. Simplification of 3d cooled turbine blade models for efficient dynamic analyses

    University essay from KTH/Kraft- och värmeteknologi

    Author : Arokia Arokia Lourdu Marshall; [2013]
    Keywords : SGT-750; Cooled turbine blades;

    Abstract : In gas turbines, the temperature behind the combustors is the highest, meaning that the blades in the first stage of the turbine require cooling air. This makes the structural blade model very detailed due to the presence of the cooling pattern. READ MORE

  6. 25. Map and explain a position in the PC supply chain

    University essay from Lunds universitet/Produktionsekonomi

    Author : Johan Dahlgren; Tobias Samuelsson; [2013]
    Keywords : Business Development; Supply Chain Mapping; Supply Chain Enablement; Technology and Engineering;

    Abstract : Background Supply chains in low margin, high innovation speed industries with strong customers generate a highly competitive environment. The conditions for such environment are continuously changing and put high demands on its actors. READ MORE