Sökning: "Stefan Larsson"

Visar resultat 6 - 10 av 66 avhandlingar innehållade orden Stefan Larsson.

  1. 6. Torque based combustion phasing control

    Författare :Stefan Larsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Extremum seeking control; Combustion phasing control; Spark-advance control; Individual cylinder control; Engine control;

    Sammanfattning : Due to environmental aspects and emission legislations the automotive industry is striving towards more efficient combustion engines. Many engine control systems in production today are based on look-up tables which are calibrated for different operating conditions. LÄS MER

  3. 7. Layered optical networks : implications to switching and transmission

    Författare :Stefan Larsson; KTH; []
    Nyckelord :;

    Sammanfattning : With the aim of supporting and enhancing high-capacitycommunication networks, such as telephony, Internet and others,this work has investigated:· transmission gains withtime-slotted optical communication, · performance ofoptical add/drop multiplexers (OADMs) and optical crossconnects(OXCs), · OXC networks serving Internet Protocol(IP)-routers, · packet hop reductions in IP-controlledoptical networks, · a simple optical neighbour discoverymethod, · economics of complementing a client network withan optical express layer.Time-slotting was shown to enable bi-directionaltransmission at the same frequency and multiwavelengthtransmission over dispersion-shifted fibre. LÄS MER

  4. 8. Mixing Processes for Ground Improvement by Deep Mixing

    Författare :Stefan Larsson; KTH; []
    Nyckelord :Deep Mixing; Lime cement columns; Mixing mechanisms; Mixture quality; Field test; ANOVA; Variance reduction.;

    Sammanfattning : The thesis is dealing with mixing processes havingapplication to ground improvement by deep mixing. The mainobjectives of the thesis is to make a contribution to knowledgeof the basic mechanisms in mixing binding agents into soil andimprove the knowledge concerning factors that influence theuniformity of stabilised soil. LÄS MER

  5. 9. Person-centred care in rheumatology nursing in patients undergoing biological therapy : An explorative and interventional study

    Författare :Ingrid Larsson; Barbro Arvidsson; Bengt Fridlund; Stefan Bergman; Birgitta Andershed; Jönköping University; []
    Nyckelord :;

    Sammanfattning : Aim: The overall aim was to explore and evaluate rheumatology nursing from a person-centred care perspective in patients undergoing biological therapy.Methods: This thesis focuses on patients with chronic inflammatory arthritis (CIA) who were undergoing biological therapy at a rheumatology clinic in Sweden. LÄS MER

  7. 10. The role of methane and hydrogen in a fossil-free Swedish transport sector

    Författare :Mårten Larsson; Per Alvfors; Stefan Grönkvist; Max Åhman; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; renewable transport fuels; biogas; methane; hydrogen; electrofuels; pyrolysis; well to wheel; transport policy; energy policy; Chemical Engineering; Kemiteknik;

    Sammanfattning : Drastic reductions of greenhouse gas emissions are required to limit the severe risks associated with a changing climate. One measure is to disrupt the fossil-fuel dependency in the transport sector, but it appears difficult and costly in comparison to other measures. LÄS MER