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Visar resultat 1 - 5 av 51 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Utilizing wood ash to stimulate algal growth in mine waters from northern Sweden

    Master-uppsats, Luleå tekniska universitet/Geovetenskap och miljöteknik

    Författare :Katelyn Murphy; [2023]
    Nyckelord :acid rock drainage; acid mine drainage; controlled eutrophication;

    Sammanfattning : Acid rock drainage (ARD), caused by the oxidation of sulphide bearing minerals, continues to be an environmental impact of both closed and operational mines, leading to waters with low pH values and high metal concentrations (Park et al., 2019). LÄS MER

  3. 2. Evaluating the performance of cone crushers under various feeding conditions using DEM and coupled DEM-MBS simulations

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :John Larsson; [2023]
    Nyckelord :Discrete Element Method; DEM; Cone Crusher; Segregation; Co-Simulation; Multi-body Dynamics; MBD;

    Sammanfattning : Cone crushers are used in both the construction and mining industries for the production of aggregates and extraction of ores. Aggregates are used when building for example houses, roads and railways, hence the cone crushers are a vital part of modern society. LÄS MER

  4. 3. Jämförelse av mattor för vibrationsmatare med hjälp av försöksplanering

    Kandidat-uppsats,

    Författare :Simon Johannesson; Shukrullah Mohammad Ishaq; [2023]
    Nyckelord :Design of experiments; DoE; vibratory feeders; Design-Expert; response surface; Optimal design; Försöksplanering; Statistisk försöksplanering; vibrationsmatare; responsyta;

    Sammanfattning : Detab is a company in Jönköping that develops systems for feeding parts for robots and packaging processes. To control the flow of parts on their vibratory feeders, Detab uses different carpets with angled straws. The two mainly used carpets have been discontinued and must now be replaced. LÄS MER

  5. 4. Theoretical Considerations and Experimental Observations on Heat Transfer in Hydrogen Direct Reduced Iron

    Master-uppsats, KTH/Materialvetenskap

    Författare :Felix Göttfert; [2023]
    Nyckelord :Hydrogen Direct Reduced Iron H-DRI ; Hydrogen Hot Briquetted Iron H-HBI ; Heat Transfer; Thermal Conductivity; Thermophysical Properties; Hydrogen Direct Reduced Iron H-DRI ; Hydrogen Hot Briquetted Iron H-HBI ; Värmeöverföring; Termisk konduktivitet; Termofysiska egenskaper;

    Sammanfattning : Steel has played an indispensable role in shaping our contemporary world  and will persist to play that role for the foreseeable future. However, the steel industry currently is responsible for 7% of the global CO2-emissions, primarily due to the conventional carbon-based reduction process of iron ore. LÄS MER

  7. 5. Multilingual Transformer Models for Maltese Named Entity Recognition

    Master-uppsats, Uppsala universitet/Institutionen för lingvistik och filologi

    Författare :Kris Farrugia; [2022]
    Nyckelord :low-resource; named-entity; information extraction; Maltese;

    Sammanfattning : The recently developed state-of-the-art models for Named Entity Recognition are heavily dependent upon huge amounts of available annotated data. Consequently, it is extremely challenging for data-scarce languages to obtain significant result. LÄS MER