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Visar resultat 21 - 25 av 1054 avhandlingar som matchar ovanstående sökkriterier.

1. 21. Price measurement and index construction : some contributions to theory and application

   Författare :Jörgen Dalén; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Konsumentprisindex;

   Sammanfattning : Four different problems are treated, all concerned with problems arising when compiling price indexes in official statistics. One deals with the computation of so called elementary aggregates, low level indexes for single products, when proper weights for the observations are not available. LÄS MER

3. 22. Learning and Evaluating the Geometric Structure of Representation Spaces

   Författare :Petra Poklukar; Danica Kragic; Søren Hauberg; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Representation Learning; Machine Learning; Generative Models; Computer Science; Datalogi;

   Sammanfattning : Efficient representations of observed input data have been shown to significantly accelerate the performance of subsequent learning tasks in numerous domains. To obtain such representations automatically, we need to design both i) models that identify useful patterns in the input data and encode them into structured low dimensional representations, and ii) evaluation measures that accurately assess the quality of the resulting representations. LÄS MER

4. 23. Preservice teachers' view on the concept of function : a study including the utilization of concept maps

   Författare :Örjan Hansson; Luleå tekniska universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Mathematics Education; Matematik och lärande;

   Sammanfattning : The thesis consists of an overview of the subject, where in particular three papers are put into a frame. The overview part consists of: an introduction, a short description of some related research and theoretical framework, a summary of papers I-III and the concluding discussion. LÄS MER

5. 24. Some new Hardy-type Inequalities for integral operators with kernels

   Författare :Larissa Arendarenko; Massimo Lanza de Cristoforis; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Matematik;

   Sammanfattning : This Licentiate thesis deals with the theory of Hardy-type inequalities in anew situation, namely when the classical Hardy operator is replaced by amore general operator with kernel. The kernels we consider belong to thenew classes O+ n and O-n , n = 0; 1; :::, which are wider than co-called Oinarovclass of kernels. LÄS MER

7. 25. Technology and studies of electron transport in InAs nanowire junctions

   Författare :Dmitry Suyatin; Fasta tillståndets fysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The topic of this thesis is technology and experimental studies of electron transport in Indium Arsenide (InAs) nanowires and InAs nanowire junctions. The aim of this work has been fabrication of nanoelectronic devices which have possibilities for future nanoelectronics. LÄS MER