• Validation of independent components using a hypothesis testing approach 

      De Koker, Corine (Stellenbosch : Stellenbosch University, 2020-12)
      ENGLISH ABSTRACT: The main focus of this thesis is the validation of Independent Component Analysis (ICA), a popular technique used in signal processing. In a typical application, the purpose of ICA is to extract non-Gaussian ...
    • Exploding biplots with density axes in Plotly 

      Sandilands, Delia (Stellenbosch : Stellenbosch University, 2020-12)
      ENGLISH SUMMARY : Biplots are visual approximations to multidimensional data sets and are very useful in data driven procedures. However, certain issues occur when dealing with a large number of observations or variables. ...
    • A deep convolutional neural network architecture for image classification 

      Pretorius, Willem Lodewikus (Stellenbosch : Stellenbosch University, 2020-12)
      ENGLISH SUMMARY : Convolutional Neural Networks (CNNs), a specialised form of Neural Networks (NNs), are wellknown for their state-of-the-art results obtained in Computer Vision (CV) and Deep Learning (DL) tasks throughout ...
    • Categorical CVA biplots 

      Rodwell, David Timothy (Stellenbosch : Stellenbosch University, 2020-12)
      ENGLISH ABSTRACT: In the modern era a great amount of emphasis is placed on data visualisation, especially in cases where a large amount of data is present. Usually, in these instances, the data is of a high-dimensional ...
    • Bayesian machine learning : theory and applications 

      Payne, Megan Wendy (Stellenbosch : Stellenbosch University, 2020-12)
      ENGLISH SUMMARY : Machine learning problems in general are concerned with the ability of different methods and algorithms to extract useful and interpretable information from large datasets, possibly ones which are corrupt ...
    • The appropriateness of ISDA SIMM for delta risk initial margin calculations in the South African over-the-counter interest rate swap market 

      Cronje, Robert (Stellenbosch : Stellenbosch University, 2020-12)
      ENGLISH SUMMARY : This research assignment assesses the appropriateness of the calibrations in the ISDA SIMM for calculating delta risk initial margin (IM) in the current over-the-counter interest rate swap market in South ...