Browsing NHH Brage by Author "Guo, Zhaoxia"

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Understanding the marginal distributions and correlations of link travel speeds in road networks

Guo, Feng; Gu, Xin; Guo, Zhaoxia; Dong, Yucheng; Wallace, Stein William (Peer reviewed; Journal article, 2020)

Link travel speeds in road networks are essential data for a variety of research problems in logistics, transportation, and traffic management. Real-world link travel speeds are stochastic, and highly dependent on speeds ...
Vehicle Routing with Space- and Time-Correlated Stochastic Travel Times: Evaluating the Objective Function

Guo, Zhaoxia; Wallace, Stein William; Kaut, Michal (Peer reviewed; Journal article, 2019)

We study how to model and handle correlated travel times in two-stage stochastic vehicle-routing problems. We allow these travel times to be correlated in time and space; that is, the travel time on one link in one period ...