Sökning: "principal component"

Visar resultat 1 - 5 av 397 uppsatser innehållade orden principal component.

  1. 1. Detecting Fraudulent User Behaviour : A Study of User Behaviour and Machine Learning in Fraud Detection

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Analys och partiella differentialekvationer

    Författare :Patrik Gerdelius; Sjönneby Hugo; [2024]
    Nyckelord :Fraud Detection; User Behaviour; Random Forest; PCA; SMOTE;

    Sammanfattning : This study aims to create a Machine Learning model and investigate its performance of detecting fraudulent user behaviour on an e-commerce platform. The user data was analysed to identify and extract critical features distinguishing regular users from fraudulent users. LÄS MER

  3. 2. Detecting Lithium Brine in Afghanistan Using Spaceborne Hyperspectral Data

    Master-uppsats, Göteborgs universitet/Institutionen för geovetenskaper

    Författare :Torpikay Azizi; [2023-08-18]
    Nyckelord :PRISMA Hyperspectral data; lithium mineral deposits; lithium brine-rich deposits; Dashti-e- Nawar; boron deposits; Principal Component Analysis PCA ; supervised and unsupervised classification; spectral matching; spectral profile analysis; visible-near-infrared VNIR ; short-wave infrared SWIR Gypsum; Hectorite; Kaolinite; Lepidolite; lithium carbonate; lithium chloride;

    Sammanfattning : The purpose of this thesis is to utilize hyperspectral remote sensing technology for the identification and evaluation of lithium mineral deposits in Afghanistan. Afghanistan boasts unique geological formations with substantial potential for lithium resources beneath its land crust. LÄS MER

  4. 3. Are European Green Bond Yields Lower Than the Yields of Their Conventional Counterparts?

    Master-uppsats, Göteborgs universitet/Graduate School

    Författare :Caroline Lundberg; Olle Enelund; [2023-06-29]
    Nyckelord :Green bonds; Greenium; Sustainable investment; Principal Component Analysis PCA ; Nelson-Siegel NS ;

    Sammanfattning : In this paper, we contribute to the growing literature on sustainable finance by investigating whether European green bonds provide a lower issue yield compared to their conventional counterparts, i.e. if there exists a greenium in the primary market. LÄS MER

  5. 4. Coupling between iron and humic substances in a land-sea transitional zone in the northern Baltic Sea

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Anna Osterman; [2023]
    Nyckelord :Iron; Humic substances; Dissolved organic carbon; Baltic Sea; Rivers;

    Sammanfattning : In marine ecosystems around the world, iron (Fe) is a well-studied and important trace element which has been found to stimulate phytoplankton and cyanobacteria growth, as well as limit nitrogen fixation and being essential for Legionella pneumophila which is known as the main cause of Legionnaires’ disease. Fe also contributes to the brownification of freshwater and has recently been documented to increase in concentration in rivers in Sweden. LÄS MER

  7. 5. The impact of financial intermediation on economic growth in East African Community (EAC) and North African countries

    Magister-uppsats, Karlstads universitet/Handelshögskolan (from 2013)

    Författare :Ikraan Jeylani Hassan; Khali Mohamed; [2023]
    Nyckelord :EAC; North African; Financial intermediation; Economic growth; Granger causality;

    Sammanfattning : This thesis investigates the impact of financial intermediation on economic growth in two regions: the East African Community (EAC) countries (Burundi, Kenya, Tanzania, Rwanda, and Uganda) and North African countries (Algeria, Egypt, Morocco, and Tunisia). The study analyzes the regions employing a Granger causality test and explores if financial intermediation influences economic growth. LÄS MER