Sökning: "coordinates"

Visar resultat 1 - 5 av 179 avhandlingar innehållade ordet coordinates.

1. 1. Plant Population Dynamics and Conservation in Wooded Hay-Meadows – Effects of Intensified Management

   Författare :Lotta Wallin; Brita M. Svensson; Mikael Lönn; Johan Ehrlén; Uppsala universitet; []
   Nyckelord :Biology; coordinates; demographic model; dispersal; hay-meadow; Hypochoeris maculata; litter; management; Polygala amarella; stochastic modelling; Succisa pratensis; Biologi;

   Sammanfattning : The decrease in number and area of managed hay-meadows over the last century, in combination with the reduction of traditional management, threatens the biodiversity connected to these habitats. I experimentally examined how management intensity affected meadow characteristics and long-term population viability of three vascular plant species in wooded hay-meadows on the Swedish island of Gotland in the Baltic Sea. LÄS MER

3. 2. Algorithms in data mining using matrix and tensor methods

   Författare :Berkant Savas; Lars Eldén; Lieven De Lathauwer; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Volume; Minimization criterion; Determinant; Rank deficient matrix; Reduced rank regression; System identification; Rank reduction; Volume minimization; General algorithm; Handwritten digit classification; Tensors; Higher order singular value decomposition; Tensor approximation; Least squares; Tucker model; Multilinear algebra; Notation; Contraction; Tensor matricization; Newton s method; Grassmann manifolds; Product manifolds; Quasi-Newton algorithms; BFGS and L-BFGS; Symmetric tensor approximation; Local intrinsic coordinates; Global embedded coordinates; ; Numerical analysis; Numerisk analys;

   Sammanfattning : In many fields of science, engineering, and economics large amounts of data are stored and there is a need to analyze these data in order to extract information for various purposes. Data mining is a general concept involving different tools for performing this kind of analysis. LÄS MER

4. 3. Dopamine coordinates the effect of natriuretic and antinatriuretic factors

   Författare :Susanne Crambert; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Living organisms are dependent on a precise regulation of water and sodium. The stability of the internal environment is maintained through a series of feedback mechanisms, in response to changes within the organism as well as to changes in the external environment. LÄS MER

5. 4. Handling of curvilinear coordinates in a PDE solver framework

   Författare :Malin Ljungberg; Michael Thuné; Kurt Otto; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Beräkningsvetenskap; Scientific Computing;

   Sammanfattning : By the use of object-oriented analysis and design combined with variability modeling a highly flexible software model for the metrics handling functionality of a PDE solver framework was obtained. This new model was evaluated in terms of usability, particularly with respect to efficiency and flexibility. LÄS MER

7. 5. Efficient Information Visualization of Multivariate and Time-Varying Data

   Författare :Jimmy Johansson; Mikael Jern; Matthew Cooper; Helwig Hauser; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Information visualization; parallel coordinates; interactive analysis; multivariate data; time-varying data; GPU; hardware graphics; Computer science; Datalogi;

   Sammanfattning : Data can be found everywhere, for example in the form of price, size, weight and colour of all products sold by a company, or as time series of daily observations of temperature, precipitation, wind and visibility from thousands of stations. Due to their size and complexity it is intrinsically hard to form a global overview and understanding of them. LÄS MER