Search for dissertations about: "obstacle"

Showing result 21 - 25 of 365 swedish dissertations containing the word obstacle.

  2. 21. Towards On-line Learning Agents for Autonomous Navigation

    Author : Guang Li; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; path-finding; head direction; artificial neural network; spatial representation; on-line learning; navigation; localization; autonomous mobile robot; obstacle avoidance; place learning;

    Abstract : The design of a mechatronic agent capable of navigating autonomously in a changing and perhaps previously unfamiliar environment is a very challenging issue. This thesis addresses this issue from both functional and system perspectives. READ MORE

  4. 22. Reactive Navigation Methods for Autonomous Robots: Safety, Coordination, and Field Deployment

    Author : Björn Lindqvist; George Nikolakopoulos; Christoforos Kanellakis; Alberto Bemporad; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Field Robotics; NMPC; Obstacle Avoidance; Collision Avoidance; Multi-agent Systems; Robot Navigation; Robotics and Artificial Intelligence; Robotik och artificiell intelligens;

    Abstract : In the new era of intelligent systems, small-scale electronics, and advanced sensors, the application use-cases and operational capabilities of autonomous robots are exponentially increasing. Through their ability to execute complex tasks while relying only on onboard sensors and computation, autonomous field robots are showing promising results in inspection of infrastructure, search-and-rescue or surveillance, maintenance tasks, or in general operations in areas that prove to be dangerous or hazardous for human operators to enter, while also often increasing the efficiency of such tasks. READ MORE

  5. 23. Partial Balayage and Related Concepts in Potential Theory

    Author : Joakim Roos; Henrik Shahgholian; Björn Gustafsson; Charles Smart; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Partial balayage; equilibrium measure; obstacle problem; divisible sandpile; Riemannian manifold; quadrature domain; Laplacian growth; mother body; Mathematics; Matematik;

    Abstract : This thesis consists of three papers, all treating various aspects of the operation partial balayage from potential theory.The first paper concerns the equilibrium measure in the setting of two dimensional weighted potential theory, an important measure arising in various mathematical areas, e.g. READ MORE

  6. 24. Free Boundary Problems of Obstacle Type, a Numerical and Theoretical Study

    Author : Mahmoudreza Bazarganzadeh; Henrik Shahgholian; John King; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Partial differential equations; Numerical analysis; Free boundary problems; Mathematics; Matematik;

    Abstract : This thesis consists of five papers and it mainly addresses the theory and schemes to approximate the quadrature domains, QDs. The first deals with the uniqueness and some qualitative properties of the two QDs. The concept of two phase QDs, is more complicated than its one counterpart and consequently introduces significant and interesting open. READ MORE

  7. 25. Experimental and theoretical study of post-dryout heat transfer in annuli with flow obstacle

    Author : Ionut Anghel; Henryk Anglart; Dariusz Mikielewicz; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; annulus; flow obstacles; critical heat flux; post-dryout; thermal margins; boiling water reactor; Fysik; Physics;

    Abstract : An experimental study on post dryout heat transfer regime in annuli with flow obstacles wasconducted in the High-pressure Water Test (HWAT) loop at the Royal Institute of Technologyin Stockholm, Sweden. An annulus with flow obstacles, consisting of two concentric heatedpipes (12.7x24. READ MORE