Sökning: "consumption modelling"

Visar resultat 6 - 10 av 191 avhandlingar innehållade orden consumption modelling.

  1. 6. Energy Consumption and Running Time for Trains : modelling of running resistance and driver behaviour based on full scale testing

    Författare :Piotr Lukaszewicz; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy consumption; Running time; running resistance; driver behaviour; freight; train; energy coasting method; aerodynamic drag; driver model; degree of coasting; slippage; wind; Energy saving; braking ratio; powering ratio; full scale testing; Vehicle engineering; Farkostteknik;

    Sammanfattning : The accuracy in determined energy consumption and runningtime of trains, by means of computer simulation, is dependent upon the various models used. This thesis aims at developing validated models of running resistance, train and of a generaldriver, all based on full scale testing. LÄS MER

  3. 7. Tumour vasculature, oxygenation and radiosensitivity - a numerical modelling study

    Författare :Jakob Heydorn Lagerlöf; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Angiogenesis; Dosimetry; Hypoxia; Modelling; Radionuclide therapy; Radiotherapy; Tumour Control Probability;

    Sammanfattning : This thesis aims to investigate theoretically how parameters such as vessel density, blood oxygenation, blood velocity, spatial oxygen variation along vessels, tissue oxygen consumption and their distributions in uence the radiosensitivity of tumours. Numerical calculations are made in Matlab using voxel-based models. LÄS MER

  4. 8. Modelling for Fuel Optimal Control of a Variable Compression Engine

    Författare :Ylva Nilsson; Lars Eriksson; Lars Nielsen; Richard K. Stobart; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; combustion engine; modelling; Vehicle engineering; Farkostteknik;

    Sammanfattning : Variable compression engines are a mean to meet the demand on lower fuel consumption. A high compression ratio results in high engine efficiency, but also increases the knock tendency. On conventional engines with fixed compression ratio, knock is avoided by retarding the ignition angle. LÄS MER

  5. 9. Sustainable consumption for policymakers: measuring, learning and acting

    Författare :Elena Dawkins; Viveka Palm; Mattias Höjer; Åsa Persson; Paul Ekins; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sustainable consumption; environmental pressures; consumption-based indicators; footprint; policymaker; measuring; learning; action; Sweden; Planering och beslutsanalys; Planning and Decision Analysis;

    Sammanfattning : Current patterns and levels of consumption are a key driver of unsustainable resource use and pollution, which contributes to global environmental degradation. Rapid reductions in environmental pressures are required to avoid irreversible loss of fragile ecosystems and social and economic crises. Consumption must become sustainable. LÄS MER

  7. 10. On Zero-dimensional Modelling of Combustion and NOx Formation in Diesel Engines

    Författare :Rolf Egnell; Förbränningsmotorer; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; framdrivningssystem; Motorer; Motors and propulsion systems; NOx Formation; Zero-Dimensional; Modelling; Diesel Engines; Termisk teknik; Thermal engineering; applied thermodynamics; termodynamik;

    Sammanfattning : Diesel engine developers are facing major challenges when meeting future demands on NOx and particulate emissions. The exhausts after treatment systems are rapidly improving and the technologies available in a few years will be capable of cutting emission levels close to the demanded levels. LÄS MER