Sökning: "drift"

Visar resultat 6 - 10 av 718 avhandlingar innehållade ordet drift.

  1. 6. Ramverk för en drift- och underhållsstrategi ur ett regelstyrt infrastrukturperspektiv

    Författare :Ulla Espling; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance;

    Sammanfattning : Managing the Swedish state railways is a complex task where internal and external factors must be taken into consideration at the same time as demands for efficiency are made by owners, customers and end customers. Banverket (‘The National Swedish Rail Administration') was formed in 1988 by the Swedish State Railways, a public service corporation, being divided into an infrastructure unit, Banverket, and a transport enterprise, SJ (‘the Swedish State Railways'). LÄS MER

  3. 7. Drift Waves in General Toroidal Equilibria

    Författare :Johan Anderson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; fusion plasmas; instabilities; toroidal geometry; drift waves;

    Sammanfattning : One of the main concerns in fusion research is to understand the anomalously high transport in magnetically confined plasmas. In recent years, substantial progress in the understanding of transport in terms of drift waves in fusion plasmas has been achieved. LÄS MER

  4. 8. Drift waves in advanced tokamak plasmas

    Författare :Ansar Mahmood; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; linear instabilities; tokamaks; Drift waves;

    Sammanfattning : .... LÄS MER

  5. 9. Prognostics and Health Management of Engineering Systems for Operation and Maintenance Optimisation

    Författare :Madhav Mishra; Matti Rantatalo; Kai Goebel; Kalevi Huhtala; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Prognostics and Health Management PHM ; Diagnostics; Prognostics; Bayesian; Hierarchical; L10; Prediction; Bearing; Li-ion battery; RUL; Particle filter; Model-based; Data-driven; Algorithms; Railway track geometry; Operation and Maintenance Engineering; Drift och underhållsteknik;

    Sammanfattning : Prognostics and health management (PHM) is an engineering discipline that aims to maintain system behaviour and function and ensure mission success, safety and effectiveness. Prognostics is defined as the estimation of remaining useful life. LÄS MER

  7. 10. Drift and Mirror Modes in Magnetized Plasmas

    Författare :Ingmar Sandberg; Padma Shukla; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; tokamak plasma; drift waves; space plasma; mirror instability.; Astronomi; Astronomy and astrophysics; Astronomi och astrofysik; Space and Plasma Physics; rymd- och plasmafysik;

    Sammanfattning : Low frequency plasma instabilities driven by plasma inhomogeneity and velocity anisotropies are major candidates for the explanation of various phenomena observed in fusion and space plasmas. For low-β fusion plasma, the influence of plasma rotation and finite ion temperature on the structure and the type of toroidal drift eigenmodes in tokamaks is investigated rigorously, including the effects induced by the toroidal geometry such as the coupling mode, the radial variation of plasma rotation velocity and the magnetic shear. LÄS MER