Search for dissertations about: "hard ground"

Showing result 1 - 5 of 48 swedish dissertations containing the words hard ground.

  2. 1. Transient steering of tracked vehicles on hard ground

    Author : Dag Thuvesen; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; DADS; steering; ADAMS; MBS; hard ground; tracked vehicle; MECHANICA MOTION; multi body system; solid ground; simulation;

    Abstract : .... READ MORE

  4. 2. Countermeasures against railway ground and track vibrations

    Author : Robert Hildebrand; KTH; []
    Keywords : ground vibration; vibration screen; track vibration; railway vibration; seismic barrier;

    Abstract : Railway track and ground vibrations are considered, with anemphasis on methods of mitigation ("countermeasures"), forapplication to wayside disturbance problems.Original field measurements from two sites in Sweden, aswell as borrowed measurements from Norway, provide vibrationresults at many points on the track, on and underneath theground surface, for a variety of trains, both with and withoutcountermeasures in-place. READ MORE

  5. 3. Algorithmic Bounds for Presumably Hard Combinatorial Problems

    Author : Andreas Björklund; Institutionen för datavetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; numerisk analys; system; control; Datalogi; numerical analysis; systems; Computer science; Approximation algorithms; Exact algorithms; NP-hard problems; Algorithm theory; kontroll;

    Abstract : In this thesis we present new worst case computational bounds on algorithms for some of the most well-known NP-complete and #P-complete problems and their optimization variants. We consider graph problems like Longest Path, Maximum Cut, Number of Perfect Matchings, Chromatic and Domatic Number, as well as Maximum k-Satisfiability and Set Cover. READ MORE

  6. 4. Hard Turning of Bearing Steels. Controlling residual stress and improving fatigue life

    Author : Michael Jacobson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; x-ray diffraction; bearing steel; residual stress; fatigue life; cutting conditions; hard turning;

    Abstract : There are many different precision mechanical components such as bearings, fuel injectors, gears and hydraulic components, which are made of hardened steels, and have to be machined to a high degree of precision. Traditionally these components are being ground. READ MORE

  7. 5. New Methods for Reducing Ground-Borne Noise in Buildings above Railway Tunnels

    Author : Osama A. B. Hassan; KTH; []
    Keywords : Ground-borne noise; railway noise; in-plane waves; wave-guides; scattering; propagation constant; input mobility; elastic stratum; dual integral equations;

    Abstract : The rapid expansion of major cities in the west Europeancountries has accentuated the need to exploit every potentialsite for new establishments, e.g. areas over train tunnels andnear railway tracks in general. READ MORE