Sökning: "uncertainty reduction"

Visar resultat 6 - 10 av 137 avhandlingar innehållade orden uncertainty reduction.

1. 6. Multiscale Methods and Uncertainty Quantification

   Författare :Daniel Elfverson; Axel Målqvist; Frédéric Legoll; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multiscale methods; finite element method; discontinuous Galerkin; Petrov-Galerkin; a priori; a posteriori; complex geometry; uncertainty quantification; multilevel Monte Carlo; failure probability; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

   Sammanfattning : In this thesis we consider two great challenges in computer simulations of partial differential equations: multiscale data, varying over multiple scales in space and time, and data uncertainty, due to lack of or inexact measurements.We develop a multiscale method based on a coarse scale correction, using localized fine scale computations. LÄS MER

3. 7. On Robot Control using Range Sensors : with Special Reference to Active Uncertainty Reduction

   Författare :Bernt Nilsson; Aarne Halme; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Robot Gripping and Docking; Gripper-Object Feedback; Non-contact Sensing; Laser Ranging; Flexible Arm; Mobile Robot; Probing; Dual Control; LQG-Feedback;

   Sammanfattning : This thesis addresses the problem of positioning robots relative to objects in the surrounding work space. The object's position and orientation (posture) are measured using a non-contact sensor on-board the robot. For gripping/docking tasks the goal posture is specified relative to the object and not in a fixed coordinate system of the robot. LÄS MER

4. 8. Exploring the relevance of uncertainty in the life cycle assessment of forest products

   Författare :Frida Røyne; Mats Tysklind; Stina Jansson; Johanna Berlin; José Potting; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LCA; wood; forestry; uncertainty; biorefinery; industrial symbiosis; allocation; system boundaries; bio-economy; LCA; trä; skogsbruk; osäkerhet; bioraffinaderi; industriell symbios; allokering; systemgränser; bioekonomi;

   Sammanfattning : The role of forest biomass as a replacement for fossil fuels and products is becoming increasingly prominent as a means to mitigate climate change. To guide a sustainable transition towards a forest-based bio-economy, it is important that advantages and disadvantages of forest products are assessed, to ensure that the products deliver environmental impact reduction. LÄS MER

5. 9. Effects of Certainty on Decision Making under Uncertainty: using subsidies to reduce production of environmental harmful products

   Författare :Lars E. Olsson; Göteborgs universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; certainty; environmental; policy; experiment; individuel decision making; interdependent decision making; risk taking; subsidy; uncertainty;

   Sammanfattning : The present thesis investigates the effects of an environmental policy, with the focus on producers’ decision making, which may be used as a means to decrease the production of environmentally harmful products. A subsidy system reimbursing a reduction in sales and/or production is with this aim experimentally investigated by simulating a market. LÄS MER

7. 10. Value of Information Analysis for Site Investigations in Remediation Projects

   Författare :Pär-Erik Back; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; uncertainty; value of information; soil; decision analysis; sampling; remediation; contaminated land; site investigation;

   Sammanfattning : Site investigations of contaminated land are associated with high costs. From a societal point of view, just enough economic resources should be spent to allow societys limited resources to be allocated optimally to sustainable development. LÄS MER