Sökning: "Principalkomponentanalys PCA"

Visar resultat 1 - 5 av 37 uppsatser innehållade orden Principalkomponentanalys PCA.

  1. 1. A Multi-Level Extension of the Hierarchical PCA Framework with Applications to Portfolio Construction with Futures Contracts

    Master-uppsats, KTH/Matematisk statistik

    Författare :Kajsa Bjelle; [2023]
    Nyckelord :Portfolio construction; asset allocation; principal component analysis; hierarchical principal component analysis; hierarchical shrinkage; eigenportfolio risk; Portföljkonstruktion; tillgångsallokering; principalkomponentanalys; hierarkisk principalkomponentanalys; hierarkisk krympning; egenportföljrisk;

    Sammanfattning : With an increasingly globalised market and growing asset universe, estimating the market covariance matrix becomes even more challenging. In recent years, there has been an extensive development of methods aimed at mitigating these issues. LÄS MER

  3. 2. A Toxic Legacy? : A Study of PFAS Leakage from Landfills in the Eastern Part of Mälaren

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Elsa Hård af Segerstad; [2023]
    Nyckelord :Landfills; PFAS; Leachate; Mälaren-Görväln; Östra Mälaren Water Protection Area; Norrvatten; Drinking Water; Characterisation; Risk Assessment; Deponier; PFAS; Lakvatten; Mälaren-Görväln; Östra Mälarens vattenskyddsområde; Norrvatten; Dricksvatten; Karakterisering; Riskbedömning;

    Sammanfattning : The growing concern around per- and polyfluoroalkyl substances (PFAS) and their negative health and environmental effects have lately become more apparent which also is reflected in the new, more strict regulations of permitted levels of PFAS in drinking water extracted from water resources. However, many point sources of PFAS pollution to the environment and to water resources are still not identified and assessed for risk. LÄS MER

  4. 3. First cycle, 15 credits Machine Learning based Clustering of Bank Card Consumers : Identification of risk groups for fraud detection purposes

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

    Författare :Jacob Hernberg; Ali Cicek; [2022]
    Nyckelord :;

    Sammanfattning : To safeguard consumers, banks have developed machine learning based fraud detections systems which work to prevent fraudulent card transactions from occurring. The goal of this report is to improve these systems by trying to segment consumers into different risk groups. LÄS MER

  5. 4. Baking quality of winter wheat : the effect of variety, cultivation site and nitrogen supply

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Linnéa Gustafsson; [2022]
    Nyckelord :bread; baking quality; winter wheat; variety; cultivation site; nitrogen supply; genotype; environment;

    Sammanfattning : Wheat is the most important cereal crop for breadmaking. Different wheat varieties tend to yield varying bread quality, which is affected both by genotype and environmental factors. The present study aims to investigate the genetic and environmental effect on bread quality. LÄS MER

  7. 5. Dietary fiber content and composition in heritage wheat

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Lisa Andersson; [2022]
    Nyckelord :Heritage cereals; wheat; dietary fiber; fructan; Dacke; Dala Lantvete; Källunda; Ölandsvete;

    Sammanfattning : Wheat is the main food source in the world. A secured production has however been threatened by environmental changes in combination with the need of producing more food for a growing population. As a result, there has been an increasing interest in finding new crop varieties susceptible to abiotic stress. LÄS MER