Sökning: "surrogate"

Visar resultat 21 - 25 av 158 uppsatser innehållade ordet surrogate.

  1. 21. Active Learning for Solving Expensive Optimization Problems

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Siwei Fu; [2022]
    Nyckelord :;

    Sammanfattning : Many practical engineering and computer science problems can be translated into a global otimization problem where the task is to find the best (optimal) vector 𝒙𝒙∗ that gives the smallest possible function value 𝑓𝑓 = 𝑓𝑓(𝒙𝒙∗) for some function 𝑓𝑓() of interest. Often the function 𝑓𝑓() is expensive in the sense that it cannot be easily evaluated computationally or experimentally in terms of time and/or resources required. LÄS MER

  3. 22. Chelating agents in NiMo sulfided catalysts and the effect of nitrogen compounds on hydrodearomatization and hydrodenitrogenation reactions

    Master-uppsats, KTH/Kemiteknik

    Författare :Lilla Lukovicsová; [2022]
    Nyckelord :hydrotreating; NiMo Al2O3; HDN; HDA; trickle-bed microreactor; Type I and II hydrotreating catalysts; Hydrering; NiMo Al2O3; HDN; HDA; porlbädd reaktor; Typ I och II hydrering katalysatorer;

    Sammanfattning : Hydrering är en viktig process för att producera produkter med önskade egenskaper samt att uppfylla de lagliga krav som existerar med avseende på miljö och hälsa. Reaktionerna som sker vid hydreringen är katalytiska vilket innebär att förstå sam utnyttja de mest lämpliga katalysatorerna är av yttersta vikt. LÄS MER

  4. 23. Hydrodynamic and Eutrophication Modelling of Lake Vomb: Impact of Future Climate Change on Cyanobacteria

    Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

    Författare :Ahmed Elhabashy; [2022]
    Nyckelord :Hydrodynamic modelling; eutrophication; Cyanobacteria; Chlorophyll-a; climate change; MIKE 3 FM; Lake Vomb;

    Sammanfattning : The increasing frequency of Cyanobacterial blooms in freshwater bodies raise concerns around the globe. The consequences of this phenomenon impact not only human health but the entire surrounding ecosystem. During the past decades, numerical modelling has been increasingly used to investigate and study aquatic systems. LÄS MER

  5. 24. Explainability of Machine Learning in Forecasts for Retail Sales Campaigns

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Alexander Olsson; Robin Zamojsky; [2022]
    Nyckelord :;

    Sammanfattning : Explainable artificial intelligence is a growing field which is becoming increasingly important as machine learning is more integrated in businesses and various functions in society. A rising concern is the lack of transparency in decision-making processes for a substantial number of machine learning models. LÄS MER

  7. 25. Optimising the present and designing the future: a novel SPS injection system

    Master-uppsats, Uppsala universitet/FREIA

    Författare :Elias Waagaard; [2022]
    Nyckelord :Numerical optimisation; injection; Super Proton Synchrotron; neural networks;

    Sammanfattning : The Super Proton Synchrotron (SPS) injection system plays a fundamental role to preserve the quality of injected high-brightness beams for the Large Hadron Collider (LHC) physics program and to maintain the maximum storable intensity. The present system is the result of years of upgrades and patches of a system not conceived for such intensities and beam qualities. LÄS MER