Sökning: "fractions bar"

Hittade 4 uppsatser innehållade orden fractions bar.

  1. 1. Modelling the Production of Biofuels via Olefins Oligomerisation

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Nima Mirzaei; [2020]
    Nyckelord :Biofuels; Mathematical Modelling; Process Simulation; Oligomerisation; Fischer-Tropsch; Biobränslen; Matematisk Modellering; Process Simulering; Oligomerisering; Fischer-Tropsch;

    Sammanfattning : The technical feasibility of gasoline and diesel range hydrocarbons production through oligomerisation of olefins, starting from biomass with the intermediary steps of gasfication, water-gas shift reaction and syngas-to-olefins synthesis was investigated, through mathematical modelling and simulation on Matlab. The model for the gasifier was based on minimisation of Gibbs free energy and its results showed that higher carbon efficiencies could be achieved at lower pressures and steam inlet, and more inlet energy, by pre-heating the gasifying agents. LÄS MER

  3. 2. Bråktal, decimaltal och procent : En kvalitativ studie om hur sambandet mellan bråktal, decimaltal och procent undervisas i årskurs 4-6

    Uppsats för yrkesexamina på grundnivå, Södertörns högskola/Lärarutbildningen

    Författare :Zahraa Abdulrasul; [2017]
    Nyckelord :Fractions; decimals; percent; connection; aspect of fractions; circle graphs; number line; numerator; denominator; tenth; hundredth; thousandth; decimal mark; fractions bar; Bråktal; decimaltal; procent; samband; bråktals ansikte; bråkcirklar; tallinje; täljare; nämnare; tiondel; hundradel; tusendel; decimaltecken; bråkstreck;

    Sammanfattning : The aim of this study is to investigate how the connection between fractions, decimals and percent are taught in grade 4-6 with more focuson the fractions. The empirical data was obtained by qualitative methods comprising interviews with four mathematic elementary school teachers, in addition to two observations with two classrooms in grade 6. LÄS MER

  4. 3. The thermal structure of exoplanet atmospheres

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Matthew Agnew; [2015]
    Nyckelord :exoplanet; atmospheres; cold trap; hot jupiter; thermal inversion; thermal structure; Physics and Astronomy;

    Sammanfattning : Context. The discovery of hot Jupiters, giant gas exoplanets on tight orbits close to their host star, has proven instrumental in the study of exoplanet atmospheres through transit spectroscopy. LÄS MER

  5. 4. Recovery of un-combusted fuel in a gas turbine power cycle with Chemical Looping Combustion.

    Magister-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Jonas Gunnarsson; [2010]
    Nyckelord :Chemical Looping Combustion CLC un-combusted fuel gas turbine power cycle; Technology and Engineering;

    Sammanfattning : Chemical Loping Combustion (CLC) is a novel combustion technology in which the exhaust gas is inherently divided into oxygen depleted air in one stream and CO2 and water vapour in another. This is however under the ideal condition that the fuel conversion is complete, i.e. LÄS MER