Sökning: "centroid based"

Visar resultat 16 - 20 av 25 uppsatser innehållade orden centroid based.

  1. 16. Comparison of Distance-Based Classifiers for Elliptically Contoured Distributions

    Master-uppsats, Uppsala universitet/Statistiska institutionen

    Författare :Mahbuba Haque; [2017]
    Nyckelord :;

    Sammanfattning : A simulation study is carried out to compare three distance-based classifiers for their misclassification and asymptotic distributions when the data follow certain elliptically contoured distributions. The data are generated from multivariate normal, multivariate t and multivariate normal mixture distributions with varying covariance structures, sample sizes and dimension sizes. LÄS MER

  3. 17. Investigating the Correlation Between Marketing Emails and Receivers Using Unsupervised Machine Learning on Limited Data : A comprehensive study using state of the art methods for text clustering and natural language processing

    Master-uppsats, KTH/Skolan för datavetenskap och kommunikation (CSC)

    Författare :Christoffer Pettersson; [2016]
    Nyckelord :Machine learning; Unsupervised; Natural language processing; nlp; clustering; centroid based; k-means; text clustering; limited data; email clustering; lsa; svd; tf-idf; dimensionality reduction; the gap statistic; Lloyd s algorithm; vectorization; feature extraction;

    Sammanfattning : The goal of this project is to investigate any correlation between marketing emails and their receivers using machine learning and only a limited amount of initial data. The data consists of roughly 1200 emails and 98.000 receivers of these. Initially, the emails are grouped together based on their content using text clustering. LÄS MER

  4. 18. Machine learning techniques for binary classification of microarray data with correlation-based gene selection

    Master-uppsats, Uppsala universitet/Statistiska institutionen

    Författare :Patrik Svensson; [2016]
    Nyckelord :;

    Sammanfattning : Microarray analysis has made it possible to predict clinical outcomes or diagnosing patients with the help of biological data such as biomarkers or gene expressions. The data from microarrays are however characterized by high dimensionality and sparsity so that traditional statistical methods are difficult to use and machine learning algorithms are therefore applied for classification and prediction. LÄS MER

  5. 19. Experimental Analysis of Indoor Positioning System Based on Ultra-Wideband Measurements

    Master-uppsats, Linköpings universitet/Kommunikationssystem

    Författare :Thiti Sookyoi; [2016]
    Nyckelord :localization; ultra-wideband; Pozyx;

    Sammanfattning : Localization is one of the most interesting research areas in wireless networks. It is mostly used for tracking and monitoring applications such as traffic monitoring, search and rescue, navigation and so on. LÄS MER

  7. 20. Computer aided renal calculi detection using Convolutional Neural Networks

    Master-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Antai Llaquet Bayo; [2016]
    Nyckelord :;

    Sammanfattning : In this thesis a novel approach is developed to detect urethral stones based on a computer-aided process. The input data is a CT scan from the patient, which is a high-resolution 3D grayscale image. The algorithm developed extracts the regions that might be stones, based on the intensity values of the pixels in the CT scan. LÄS MER