Sökning: "Transport technology"

Visar resultat 26 - 30 av 2260 avhandlingar innehållade orden Transport technology.

1. 26. Driverless trucks in the Swedish freight transport system : An analysis of future impacts on the transport system and the emerging innovation system

   Författare :Albin Engholm; Anna Pernestål; Ida Kristoffersson; Maria Oscott; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Driverless Trucks; Automated Driving; Total Cost of Ownership; Freight Transport Modeling; Innovation Systems; Machine Design; Maskinkonstruktion;

   Sammanfattning : A large-scale introduction of driverless trucks could start taking place during the next decade. While this could bring several economic benefits for freight transport actors and society, it may also change the freight transport system and exacerbate the negative effects of road transport. LÄS MER

3. 27. Passenger assessments of quality in local public transport- measurement, variability and planning implications

   Författare :Helena Sjöstrand; Trafik och väg; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; passenger; public transport; quality; survey; Stated Preference; assessment; assignment; planning; Transportteknik; Transport technology; Road transport technology; Vägtransportteknik;

   Sammanfattning : The aim of this work was to get a more detailed basis for planning of local public transport. With more knowledge of how segments of travellers assess different parts of a journey, bus routes can be planned to fit either all passengers or selected groups better. LÄS MER

4. 28. Transport and location analysis

   Författare :Jonas Eliasson; KTH; []
   Nyckelord :transport; land use; models; location; logit; road pricing; TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : This dissertation consists of seven papers. InTime and income constraints in discrete choice models withan application to mode choice, we discuss how variouseffects of time and income constraints can be included indiscrete choice models. LÄS MER

5. 29. Modelling and Appraisal in Congested Transport Networks

   Författare :Jens West; Maria Börjesson; Oded Cats; Leonid Engelsson; Giulio Cantarella; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Transport modelling; Transit Assignment; Appraisal; Congestion; Crowding; Cost-benefit analysis; Value of time; Congestion charge; Dynamic traffic assignment; Transportvetenskap; Transport Science;

   Sammanfattning : Appraisal methodologies for congestion mitigation projects are relatively less well developed compared to methodologies for projects reducing free flow travel times. For instance, static assignment models are incapable of representing the build-up and dissipation of traffic queues, or capturing the experienced crowding caused by uneven on-board passenger loads. LÄS MER

7. 30. Effects of impurities on charge transport in graphene field-effect transistors

   Författare :Marlene Bonmann; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; carrier transport; electron and hole mobility; impurities; traps; graphene; field-effect transistors; microwave devices; saturation velocity; remote phonons;

   Sammanfattning : In order to push the upper frequency limit of high speed electronics further, thereby extending the range of applications, new device technologies and materials are continuously investigated. The 2D material graphene, with its intrinsically extremely high room temperature charge carrier velocity, is regarded as a promising candidate to push the frequency limit even further. LÄS MER