Sökning: "Sensitivity calculations"

Visar resultat 1 - 5 av 100 avhandlingar innehållade orden Sensitivity calculations.

1. 1. Sensitivity and Uncertainty Analysis of Boiling Water Reactor Stability Simulations

   Författare :Ivan Gajev; Weimin Ma; Tomasz Kozlowski; Kostadin Ivanov; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; BWR Stability; Sensitivity; Uncertainty; SRA - Energy; SRA - Energi;

   Sammanfattning : The best estimate codes are used for licensing of Nuclear Power Plants (NPP), but with conservative assumptions. It is claimed that the uncertainties are covered by the conservatism of the calculation. LÄS MER

3. 2. Uncertainty and sensitivity analysis applied to LWR neutronic and thermal-hydraulic calculations

   Författare :Augusto Hernandéz Solís; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sensitivity analysis; Nuclear best estimate codes; uncertainty analysis;

   Sammanfattning : The deterministic modeling of LWRs begins with the computation of energy‐collapsed and homogenizedmacroscopic cross‐sections by means of a lattice code. Once these parameters are functionalized as a functionof the reactor state variables and discretized in space, they are used as input variables by core simulators inorder to calculate the spatial distribution of the neutron flux and thus, the spatial distribution of the power. LÄS MER

4. 3. On Methods for Discrete Topology Optimization of Continuum Structures

   Författare :Mats Werme; Krister Svanberg; Wolfgang Achtziger; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Topology optimization; Stress constraints; Sensitivity calculations; Neighbourhood search methods; Sequential integer programming; Optimization; systems theory; Optimeringslära; systemteori;

   Sammanfattning : This thesis consists of an introduction and seven appended papers. The purpose of the introduction is to give an overview of the field of topology optimization of discretized load carrying continuum structures. LÄS MER

5. 4. Lymphedema and Health-Related Quality of Life

   Författare :Pia Klernäs; Health Sciences Centre; []
   Nyckelord :Lymphedema; Sensitivity; Responsiveness; Reliability; Validity; PROM; Questionnaire; Quality of life; Psychometric testing; lymfödem; Livskvalitet; psykometriska tester; reliabilitet; sensitivitet; validitet; responsiveness; enkät;

   Sammanfattning : The overall aim of this thesis was to develop a lymphedema-specific instrument for measuring health-related quality of life (HRQoL) and to evaluate how persons with lymphedema experience HRQoL. Lymphedema is defined as swelling in one or more parts of the body that is due to impaired lymph drainage and transport. LÄS MER

7. 5. Uncertainty and Sensitivity Analysis Applied to the Validation of BWR Bundle Thermal-Hydraulic Calculations

   Författare :Augusto Hernandéz Solís; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Latin Hypercube sampling; uncertainty and sensitivity analysis; Thermal‐hydraulic codes; simple random sampling; reactor safety analysis; BFBT benchmark;

   Sammanfattning : In recent years, more realistic safety analyses of nuclear reactors have been based on best estimate (BE) computercodes. The need to validate and refine BE codes that are used in the predictions of relevant reactor safetyparameters, led to the organization of international benchmarks based on high quality experimental data. LÄS MER