Sökning: "structure"

Visar resultat 21 - 25 av 11806 avhandlingar innehållade ordet structure.

1. 21. Regressor and Structure Selection : Uses of ANOVA in System Identification

   Författare :Ingela Lind; Lennart Ljung; Torsten Söderström; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; System identification; Regressor selection; Analysis of variance; Nonlinear systems; Structure selection; Automatic control; Reglerteknik;

   Sammanfattning : Identification of nonlinear dynamical models of a black box nature involves both structure decisions (i.e., which regressors to use and the selection of a regressor function), and the estimation of the parameters involved. LÄS MER

3. 22. Geochronology of impact structures - constraining syn- and post-impact processes using the 40Ar/39Ar and U-Pb techniques

   Författare :Maria Herrmann; Berggrundsgeologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Impact structure; Dating impact events; 40Ar 39Ar dating; U-Pb dating; Siljan impact structure; Mien impact structure; Hummeln impact structure; Puchezh-Katunki impact structure;

   Sammanfattning : The discovery, at the beginning of the 20th century, that elements can transform into other elements, due to the spontaneous decay of an instable to a stable atomic nuclei, gave rise to a powerful source for age information in many fields of earth science. For impact structures, it is crucial to establish well-defined and precise ages in order to understand how impact events affect the Earth’s geo and biosphere and also with regard to possible future events that can have devastating effects on our civilization. LÄS MER

4. 23. The Half-Vanished Structure : Hawthorne's Allegorical Dialectics

   Författare :Magnus Ullén; Brian Harding; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Literature; Nathaniel Hawthorne; American literature; dialectics; history; aesthetics; Christianity; sexuality; the Fortunate Fall; typology; allegory; anagogy; symbolism; chiastic structure; mediation; distance; transcendence; Litteraturvetenskap; Literature; Litteraturvetenskap; Literature; litteraturvetenskap;

   Sammanfattning : Invoking Coleridge’s distinction between allegory and symbol, this dissertation makes the case for allegory and symbolism as two divergent perceptual modes. Allegory, it argues, stresses the necessity of perceiving the ideal through the mediation of negation (death), while symbolism flaunts the notion that the ideal can be immediately perceived in the inef-fable realm of the emotions. LÄS MER

5. 24. Genetic structure and dispersal in plant populations

   Författare :Johan Fogelqvist; Martin Lascoux; Sophie Gerber; Beng-Olle Bengtsson; Uppsala universitet; []
   Nyckelord :population genetics; dispersal; structure; plant; gene flow;

   Sammanfattning : This thesis focuses on the spatial structure and methods to identify spatial structure in plants. Methods that investigate genetic structure can mainly be divided into equilibrium methods that reveal summed dispersal over many generations, and cluster methods, that reveal more recent dispersal events. LÄS MER

7. 25. Quantum Chemical Interpretation of Protein Crystal Structure

   Författare :Kristina Nilsson; Beräkningskemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; structure; Theoretical chemistry; quantum chemistry; Teoretisk kemi; kvantkemi; protein; ComQum-X; Hess2FF; QM MM; hetero-compound; metal; oxidation state; protonation; force field; quantum refinement; refinement;

   Sammanfattning : An initial model in the crystallographic structure determination process, usually contains many errors. To produce an accurate model, one must carry out several cycles of crystallographic refinement. LÄS MER