Sökning: "selection analysis"

Visar resultat 21 - 25 av 1260 avhandlingar innehållade orden selection analysis.

  1. 21. Voltage sag ride-through of AC drives : control and analysis

    Författare :Kai Pietiläinen; Hans-Peter Nee; Olli Pyrhönen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electronic measurement and instrumentation; Elektronisk mät- och apparatteknik;

    Sammanfattning : This thesis focuses on controller design and analysis for induction motor (IM) drives, flux control for electrically excited synchronous motors with damper windings (EESMs), and to enhance voltage sag ride-through ability and analysis for a wind turbine application with a full-power grid-connected active rectifier. The goal is to be able to use the existing equipment, without altering the hardware. LÄS MER

  3. 22. Statistical Feature Selection : With Applications in Life Science

    Författare :Roland Nilsson; Jesper Tegnér; Johan Björkegren; Sepp Hochreiter; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Machine learning; supervised learning; classification; dimemsionality reduction; multiple testing; gene expression; microarray; cancer; Bioinformatics; Bioinformatik;

    Sammanfattning : The sequencing of the human genome has changed life science research in many ways. Novel measurement technologies such as microarray expression analysis, genome-wide SNP typing and mass spectrometry are now producing experimental data of extremely high dimensions. LÄS MER

  4. 23. Trends in Childbearing and Nuptiality in Sweden : A Period Analysis

    Författare :Gunnar Andersson; Kathleen Kiernan; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Demography; Demografi; Demography; demografi;

    Sammanfattning : One purpose of this thesis is to introduce a system for presenting trends in family dynamics in contemporary Sweden. We use annual indexes of birth rates in order to display trends in childbearing for Swedish women over the years since 1961. We use similar annual indexes of marriage risks and divorce risks to display nuptiality trends since 1971. LÄS MER

  5. 24. Criterion-referenced measurement for educational evaluation and selection

    Författare :Christina Wikström; Widar Henriksson; Roger Murphy; Umeå universitet; []
    Nyckelord :Assessment; Competition; Criterion-referenced; Education; Evaluation; Grading; Grade inflation; Measurement; Selection; Validity; Beteendevetenskapliga mätningar; pedagogik; Education;

    Sammanfattning : In recent years, Sweden has adopted a criterion-referenced grading system, where the grade outcome is used for several purposes, but foremost for educational evaluation on student- and school levels as well as for selection to higher education. This thesis investigates the consequences of using criterion-referenced measurement for both educational evaluation and selection purposes. LÄS MER

  7. 25. Evolutionary Analysis and Posttranslational Chemical Modifications in Protein Redesign : A Study on Mu Class Glutathione Transferases

    Författare :Ylva Ivarsson; Bengt Mannervik; Gun Stenberg; Richard N. Armstrong; Uppsala universitet; []
    Nyckelord :Biochemistry; glutathione transferase; evolutionary analysis; positive selection; epoxide; stereoselectivity; protein modification; Biokemi;

    Sammanfattning : Glutathione transferases (GSTs) constitute a family of multifarious enzymes that conjugate glutathione (GSH) with a wide range of electrophiles. GSTs are grouped into different classes based on protein sequence similarities. Despite high sequence identities between GSTs of the same class they often display different substrate specificites. LÄS MER