Sökning: "reconstructing"

Visar resultat 16 - 20 av 217 uppsatser innehållade ordet reconstructing.

1. 16. Nitrogen legacies in agricultural catchments : an analysis of 170 years of nitrogen legacies data in four Swedish agricultural catchments

   Master-uppsats, SLU/Dept. of Soil and Environment

   Författare :Laura-Ainhoa Prischl; [2023]
   Nyckelord :nitrogen mass balance; nitrogen surplus; land use trajectories; hysteresis effect; water quality; agriculture; nitrogen surplus; land use trajectories; hysteresis effect; water quality; agriculture;

   Sammanfattning : Despite the enforcement of legislation and application of measures, nitrogen (N) levels continue to be high in streams. One of the reasons for the low N reduction, is the legacy accumulation of N. LÄS MER

3. 17. Reconstruction of Fire Spread with a Markov Random Field Mixture Model

   Master-uppsats, Lunds universitet/Matematisk statistik

   Författare :Marcus Gehrmann; [2023]
   Nyckelord :Forest fire; fire scars; spatial statistics; Markov random field; EM-algorithm; pseudo-likelihood; Mathematics and Statistics;

   Sammanfattning : This thesis revolves around reconstructing fire sizes for historical fires in Jämtgaveln, Sweden based on data of fire scars in trees. We propose a Hidden Markov Model (HMM), where the domain is divided into quadratic grid cells of 250 $\times$ 250 m and with these grid cells we associate a binary Markov random field taking values 0 or 1 corresponding to no fire and fire respectively. LÄS MER

4. 18. Evaluation of a Novel Reconstruction Framework for Gamma Knife Cone-Beam CT - The Impact of Scatter Correction and Noise Filtering on Image Quality and Co-registration Accuracy

   Master-uppsats, KTH/Fysik

   Författare :Ida Hägnestrand; [2023]
   Nyckelord :Gamma Knife; Cone-beam computed tomography; Image quality; Image reconstruction; Co-registration; Contrast; Uniformity; Spatial resolution; Scatter correction; Wiener filter; Noise filter; Patient positioning; Stereotactic radiosurgery; Gammakniv; Strålkniv; Cone-Beam Computed Tomography; Bildkvalitet; Bildrekonstruktion; Co-registrering; Kontrast; Uniformitet; Spatial upplösning; Spridningskorrigering; Wienerfilter; Brusfilter; Stereotaktisk strålkirurgi;

   Sammanfattning : The Gamma Knife is a non-invasive stereotactic radiosurgery system used for treatments of deep targets in the brain. Accurate patient positioning is needed for precise radiation delivery to the target. LÄS MER

5. 19. Mechanisms to enable operational efficiencies in a virtual context

   Kandidat-uppsats, Lunds universitet/Företagsekonomiska institutionen

   Författare :Anton Palmén; Morgan Bryer; Nathan Nilsson; [2023]
   Nyckelord :Virtual kitchens; Operational efficiency; Business model canvas; Virtuality; Business and Economics;

   Sammanfattning : Title: Mechanisms to enable operational efficiencies in a virtual context Seminar date: 1st of June 2023 Course: FEKH99, Bachelor Degree Project in Entrepreneurship and Innovation, 15 University Credit Points Authors: Morgan Bryer, Nathan Nilsson, Anton Palmen ´ Supervisor: Ziad El-Awad, Lund University Keywords: Virtual kitchens, Operational Mechanisms, Operational Efficiency, Business Model Canvas, Virtuality Research question: Research how the internal mechanisms of virtual restaurants enable high operational efficiency Purpose: On paper, virtual kitchens are more effective and profitable business ventures than traditional restaurants. The purpose of this thesis is to evaluate the internal mechanisms that enable operational efficiencies in virtual restaurants. LÄS MER

7. 20. Surface Reconstruction using Multipath Propagation in Indoor MIMO Radar

   Master-uppsats, Lunds universitet/Matematisk statistik

   Författare :Elias Olson; Jakob Henningsson; [2023]
   Nyckelord :Multiple-input multiple-output MIMO radar; multipath recognition; geometry reconstruction; Mathematics and Statistics;

   Sammanfattning : Using active radar for localization in indoor environments is challenging. By signal reflection off walls and other static objects, false targets occur, referred to as multipath "ghosts". These are a significant hinder in interpreting the data. LÄS MER