Sökning: "variance reduction"
Visar resultat 1 - 5 av 72 avhandlingar innehållade orden variance reduction.
1. Variance Reduction in Analytical Chemistry : New Numerical Methods in Chemometrics and Molecular Simulation
Sammanfattning : This thesis is based on five papers addressing variance reduction in different ways. The papers have in common that they all present new numerical methods. LÄS MER
2. Variance reduction methods for numerical solution of plasma kinetic diffusion
Sammanfattning : Performing detailed simulations of plasma kinetic diffusion is a challenging task and currently requires the largest computational facilities in the world. The reason for this is that, the physics in a confined heated plasma occur on a broad range of temporal and spatial scales. LÄS MER
3. Estimating Probability Distribution by doing Computer Experiments
Sammanfattning : In almost every field of engineering, advanced computer programs are used. In many cases only the probability distributions of the input variables to the programs are known. Sometimes stochastic processes are used as input, for example if the stresses in a construction due to an earthquake are to be calculated. LÄS MER
4. Variance Expressions and Model Reduction in System Identification
Sammanfattning : Although system identification is now a mature research field, some problems remain unsolved. Examples of unsolved or partly unsolved problems are; accuracy of subspace identification algorithms, identification via model reduction, identification for control, and identification of non-linear systems. LÄS MER
5. Hierarchical Variance Reduction Techniques for Monte Carlo Rendering
Sammanfattning : Ever since the first three-dimensional computer graphics appeared half a century ago, the goal has been to model and simulate how light interacts with materials and objects to form an image. The ultimate goal is photorealistic rendering, where the created images reach a level of accuracy that makes them indistinguishable from photographs of the real world. LÄS MER