Search for dissertations about: "classification accuracy"

Showing result 1 - 5 of 159 swedish dissertations containing the words classification accuracy.

  1. 1. Classification models for high-dimensional data with sparsity patterns

    Author : Annika Tillander; Tatjana Pavlenko; Daniel Thorburn; Patrik Ryden; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; High-dimensionality; supervised classification; classification accuracy; sparse; block-diagonal covariance structure; graphical Lasso; separation strength; discretization; statistik; Statistics;

    Abstract : Today's high-throughput data collection devices, e.g. spectrometers and gene chips, create information in abundance. However, this poses serious statistical challenges, as the number of features is usually much larger than the number of observed units. READ MORE

  2. 2. Studies of tibial fractures using the Swedish Fracture Register

    Author : David Wennergren; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Fracture register; Tibial Fracture; Classification; Reliability; Agreement; Accuracy; Epidemiology; Incidence; Treatment; Reoperation;

    Abstract : This thesis has two topics. First, the creation and application of the Swedish Fracture Register (SFR) is described. Second, a series of studies of tibial fractures based on data from the SFR follows. READ MORE

  3. 3. Licence to drive : the importance of reliability for the validity of the Swedish driving licence test

    Author : Susanne Alger; Hanna Eklöf; Anna Sundström; Peter Nyström; Umeå universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Driving licence tests; driver s licence; driving test; theory test; licensing test; interrater reliability; classification consistency; examiner agreement; classification accuracy; förarprov; körprov; kunskapsprov; reliabilitet; validitet; bedömare; didactics of educational measurement; beteendevetenskapliga mätningar;

    Abstract : Background: The Swedish driving licence test is a criterion-referenced test resulting in a pass or fail. It currently consists of two parts - a theory test with 65 multiple-choice items and a practical driving test where at least 25 minutes are spent driving in traffic. READ MORE

  4. 4. A novel approach to text classification

    Author : Niklas Zechner; Johanna Björklund; Efstathios Stamatatos; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Text classification; natural language processing; automata; Computer Science; datalogi;

    Abstract : This thesis explores the foundations of text classification, using both empirical and deductive methods, with a focus on author identification and syntactic methods. We strive for a thorough theoretical understanding of what affects the effectiveness of classification in general. READ MORE

  5. 5. Studies in the Dynamics of Science : Exploring emergence, classification, and interdisciplinarity

    Author : Qi Wang; Ulf Sandström; Martin Meyer; KTH; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; science dynamics; bibliometrics; emerging research topics; interdisciplinary research; journal classification systems; cognitive distance; research policy;

    Abstract : The dynamic nature of science is embodied in the growth of knowledge in magnitude and the transformation of knowledge in structure. More specifically, the growth in magnitude is indicated by a sharp increase in the number of scientific publications in recent decades. READ MORE