Essays about: "constant coefficients"

Showing result 21 - 25 of 39 essays containing the words constant coefficients.

  1. 21. Seasonal Variations of Manning’s Coefficient Depending on Vegetation Conditions in Tärnsjö, Sweden

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Rūta Plakane; [2017]
    Keywords : Manning’s roughness coefficient; vegetation; HEC-RAS; Tärnsjö; uncertainty; rating curve; Manning råhetskoefficient; vegetation; HEC-RAS; Tärnsjö; osäkerhet; ratingkurva;

    Abstract : Hydrological models are used widely and they demand for multiple input variables and observations. One of those variables is Manning’s roughness coefficient. In the current literature the variability of the coefficient poses an unknown uncertainty. READ MORE

  3. 22. Modelling of Private Infrastructure Debt in a Risk  Factor Model

    University essay from KTH/Matematisk statistik

    Author : Martina Bartold; [2017]
    Keywords : Private Infrastructure Debt; Value at Risk; Factor Models; Revenue Model Risk; Stand-Alone Risk; Risk Contribution; Privat Infrastrukturskuld; Value at Risk; Faktormodeller; Intäktsmodeller; Stand-Alone Risk; Risk Contribution;

    Abstract : Allocation to private infrastructure debt investments has increased in the recent years [15]. For managers of multi-asset portfolios, it is important to be able to assess the risk of the total portfolio and the contribution to risk of the various holdings in the portfolio. READ MORE

  4. 23. Membrane evaluation and thermal modelling of the vanadium redox flow battery

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Anders Kronander; [2016]
    Keywords : thermodynamics; Thermal; Simulation; Energy storage solutions; Modelling; VRB; Vanadium; Battery; chemical engineering; kemiteknik; Technology and Engineering; Chemistry;

    Abstract : In this study, different membranes were tested for their use in a vanadium redox flow battery (VRB). The membranes were first tested under charge-discharge operation of the VRB over four charge-discharge cycles at different current densities (20 mAcm-2, 40 mA cm-2 and 60 mAcm-2) and the corresponding cell performance was evaluated in terms of total energy efficiency (EE), coulombic efficiency (CE) and voltage efficiency (VE). READ MORE

  5. 24. Understanding igneous processes through zircon trace element systematics : prospects and pitfalls

    University essay from Lunds universitet/Geologiska institutionen

    Author : Marín Ósk Hafnadóttir; [2014]
    Keywords : plagioclase fractionation. zirkon; hydrothermal alteration; precambrian; zircon; Ghana; hydrotermal-omvandling; plagioklasfraktionering; Earth and Environmental Sciences;

    Abstract : Zirkon från magmatiska bergarter extraherades från fem granitoider i Birimianterrängen i Ghana., och detritala zirkoner provtogs från sex platser i centrala Västgrönland. Av dessa härrör en population från palaeoproterozoikum i Prøvens magmatiska komplex. READ MORE

  6. 25. Investigating the influence of farm layout on the energy production of simple wind park configurations

    University essay from KTH/Kraft- och värmeteknologi

    Author : Sercan Uysal; [2014]
    Keywords : renewable energy; wind energy; wind turbines; wake effect; wake loss; wind farm; wake models; windfarmer; layout optimization;

    Abstract : The interaction between wind turbines in simple wind farm layouts is investigated with the purpose of observing the influence of wake loss phenomenon on the energy production of downwind turbines. Following an intensive exploration stage about wind farm aerodynamics and wake modeling subjects, several tests cases are designed to represent various wind farm configurations, consisting of different number of wind turbines. READ MORE