Search for dissertations about: "Robust navigation"

Showing result 1 - 5 of 40 swedish dissertations containing the words Robust navigation.

  2. 1. Multicriteria optimization for managing tradeoffs in radiation therapy treatment planning

    Author : Rasmus Bokrantz; Anders Forsgren; Karl-Heinz Küfer; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Optimization; multicriteria optimization; robust optimization; Pareto optimality; Pareto surface approximation; Pareto surface navigation; intensity-modulated radiation therapy; volumetric-modulated arc therapy; intensity-modulated proton therapy; Optimering; flermålsoptimering; robust optimering; Paretooptimalitet; Paretofrontsapproximation; Paretofrontsnavigering; intensitetsmodulerad strålterapi; rotationsterapi; intensitetsmodulerad protonterapi;

    Abstract : Treatment planning for radiation therapy inherently involves tradeoffs, such as between tumor control and normal tissue sparing, between time-efficiency and dose quality, and between nominal plan quality and robustness. The purpose of this thesis is to develop methods that can facilitate decision making related to such tradeoffs. READ MORE

  4. 2. On Fundamental Elements of Visual Navigation Systems

    Author : Abujawad Rafid Siddiqui; J. Rafid Siddiqui; Sweden Karlskrona Blekinge Tekniska Högskola Institutionen för kommunikationssystem; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; robot navigation; localization; visual mapping; scene understanding; semantic mapping;

    Abstract : Visual navigation is a ubiquitous yet complex task which is performed by many species for the purpose of survival. Although visual navigation is actively being studied within the robotics community, the determination of elemental constituents of a robust visual navigation system remains a challenge. READ MORE

  5. 3. From Ants to Service Robots : an Exploration in Stigmergy-Based Navigation Algorithms

    Author : Ali Abdul Khaliq; Alessandro Saffiotti; Federico Pecora; Andrea Omicini; Örebro universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Stigmergy; Minimalistic Robots; Mobile robot navigation; RFID technology; Multi-robot system; Path planning; Localization; Map building;

    Abstract : Navigation is a core functionality of mobile robots. To navigate autonomously, a mobile robot typically relies on internal maps, self-localization, and path planning. Reliable navigation usually comes at the cost of expensive sensors and often requires significant computational overhead. READ MORE

  6. 4. Robust optimization of radiation therapy accounting for geometric uncertainty

    Author : Albin Fredriksson; Anders Forsgren; Timothy C. Y. Chan; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Optimization; intensity-modulated proton therapy; uncertainty; robust planning; setup error; range error; intensity-modulated radiation therapy; multicriteria optimization;

    Abstract : Geometric errors may compromise the quality of radiation therapy treatments. Optimization methods that account for errors can reduce their effects.The first paper of this thesis introduces minimax optimization to account for systematic range and setup errors in intensity-modulated proton therapy. READ MORE

  7. 5. Navigation sensors for mobile robots

    Author : Håkan Fredriksson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Abstract : In mobile robot applications navigation systems are of great importance. Automation of mobile robots demands robust navigation systems. This thesis deals with a few solutions on how to help a mobile robot navigate in an environment. READ MORE