Sökning: "Stochastic travel times"

Hittade 5 uppsatser innehållade orden Stochastic travel times.

  1. 1. Modeling and quantifying uncertainty in bus arrival timeprediction

    Master-uppsats, Linköpings universitet/Statistik och maskininlärning

    Författare :Olof Josefsson; [2023]
    Nyckelord :uncertainty quantification; arrival time prediction;

    Sammanfattning : Public transportation operates in an environment which, due to its nature of numerous possibly influencing factors, is highly stochastic. This makes predictions of arrival times difficult, yet it’s important to be accurate in order to adhere to travelers expectations. LÄS MER

  3. 2. Robust Vehicle Routing in an Urban Setting

    Master-uppsats, KTH/Optimeringslära och systemteori

    Författare :Henrik Lundkvist; [2016]
    Nyckelord :Vehicle routing problem; Stochastic travel times; Time dependent rive times; Time Windows.;

    Sammanfattning : In this thesis, the vehicle routing problem with stochastic, and time dependent, travel times is studied. The stochastic travel times are estimated from historical drive data. The variation of the drive times, as well as that of the variance, during the day was modeled. LÄS MER

  4. 3. Modellering av tågnät på Arriva DK

    M1-uppsats, Lunds universitet/Produktionsekonomi

    Författare :Carl Rydholm; Per Vingå; [2014]
    Nyckelord :Modeling; train networks; simulation; Technology and Engineering;

    Sammanfattning : Purpose: The purpose of this thesis is to develop two simulation models of Arrivas train network in Denmark to facilitate the process of timetabling. One of the models assumes deterministic times in the other model these times are stochastic. LÄS MER

  5. 4. Transporttider för vatten i närområdet till en vattentäkt : spårämnesförsök i en isälvsavlagring

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för geovetenskaper

    Författare :Jonas Enquist; [2006]
    Nyckelord :tracer test; point dilution tests; esker; travel times; water protection areas;

    Sammanfattning : When establishing a groundwater protection area it is of great interest to be able to estimate the transit time of the groundwater from different places of the aquifer to the withdrawal well. These estimates can be uncertain due to heterogeneities in the aquifer. LÄS MER

  7. 5. Transporttidsmodellering vid provpumpning i heterogen jord : spårämnesförsök i en isälvsavlagring

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för geovetenskaper

    Författare :Björn Lönnerholm; [2006]
    Nyckelord :geohydrology; groundwater modeling; geostatistics; stochastic modeling; particle tracking; protection zones; glaciofluvial esker formation; tracer experiment;

    Sammanfattning : When protection zones for wells are delineated, it is important to acquire good knowledge about possible travel time from different points in the catchment area to the well. Often, simple analytical methods are used for estimating travel times and the assumption is made that the hydraulic conductivity is relatively homogenous within the aquifer. LÄS MER