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Visar resultat 1 - 5 av 41 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Motivación, aptitud y desarrollo estructural : Un estudio sobre la actuación lingüística en aprendientes suecos de español L2

   Författare :Rakel Österberg; Lars Fant; Inge Bartning; Carmen Muñoz; Stockholms universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Analytic ability; accuracy; aptitude; development; individual differences; intrinsic and extrinsic motivation; lexical richness; proficiency; second language acquisition; spoken Spanish performance; syntactic complexity; self-regulation theory; Spanish language; Spanska språket; Spanish; spanska;

   Sammanfattning : The aim of the present study is to examine how the development of syntactic complexity and accuracy in spoken Spanish L2 is related to two parameters, motivation and aptitude, in which individual differences are often claimed to correlate with successful second language learning (Dörnyei and Skehan 2003). The study shows how an understanding of the relationship between progression in second language proficiency and motivation is gained through the study of longitudinal data and the assessment of motivation in discourse. LÄS MER

3. 2. Performance and Implementation Aspects of Nonlinear Filtering

   Författare :Gustaf Hendeby; Fredrik Gustafsson; Petar Djurić; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; particle filtering; nonlinear filtering; fault detection; Cramer-Rao lower bound; Kullback divergence; intrinsic accuracy; Automatic control; Reglerteknik;

   Sammanfattning : I många fall är det viktigt att kunna få ut så mycket och så bra information som möjligt ur tillgängliga mätningar. Att utvinna information om till exempel position och hastighet hos ett flygplan kallas för filtrering. I det här fallet är positionen och hastigheten exempel på tillstånd hos flygplanet, som i sin tur är ett system. LÄS MER

4. 3. Improving accuracy of in situ gamma-ray spectrometry

   Författare :Jonas Boson; Christer Samuelsson; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; gamma-ray spectrometry; in situ measurement; HPGe detector; 137Cs; Monte Carlo; efficiency calibration; measurement uncertainty; Radiological physics; Radiofysik;

   Sammanfattning : Gamma-ray spectrometry measurements performed on site, or “in situ”, is a widely used and powerful method that can be employed both to identify and quantify ground deposited radionuclides. The purpose of this thesis is to improve the calibration of high purity germanium (HPGe) detectors for in situ measurements, and calculate the combined uncertainty and potential systematic effects. LÄS MER

5. 4. Fundamental Estimation and Detection Limits in Linear Non-Gaussian Systems

   Författare :Gustaf Hendeby; Fredrik Gustafsson; Niclas Bergman; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Estimation; Detection; Linear systems; Non-Gaussian; Limits; GLR; CRLB; Automatic control; Reglerteknik;

   Sammanfattning : Many methods used for estimation and detection consider only the mean and variance of the involved noise instead of the full noise descriptions. One reason for this is that the mathematics is often considerably simplified this way. LÄS MER

7. 5. The Dirac Operator; From Numerics to the Theory of G-convergence

   Författare :Hasan Almanasreh; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Dirac operator; spuriousity; cubic Hermitian; stability parameter; G-convergence; ¡-convergence; spectral measure; quadratic form; stability parameter;

   Sammanfattning : We consider two main issues concerning the Dirac operator, the first is widely known as the appearance of spurious eigenvalues within the spectrum. The second is the study of the asymptotic behavior of the eigenvalues for a family of Dirac operators with oscillatory potential added to the Coulomb-Dirac Hamiltonian. LÄS MER