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Standortplanung für einen privaten Paketdienstleister
Lischak, Christoph - 2001
„Location-Routing-Problem” aus dem Bereich „Network Design”. Der Paketzustelldienst ­ auf eigenen Wunsch mit dem Pseudonym … vorgeschrieben war es aber nicht. Das Standortproblem wurde in der vorliegenden Arbeit als Location-Routing-Problem (LRP) modelliert …. Diese Problemklasse zeichnet sich dadurch aus, dass ein Vehicle-Routing-Problem (VRP) mit einem Standortproblem kombiniert …
Persistent link: https://www.econbiz.de/10009467411
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Dynamische Tourenplanung und -steuerung
Boomgaarden, Christoph - 2007
In dieser Arbeit werden dynamisch-determinstische Tourenplanungsproblemeund dynamisch-stochastische Tourensteuerungsprobleme auf Basis von Verkehrswegenetzwerken beschrieben, modelliert und L?sungsverfahren experimentell untersucht.Zun?chst wird ein neues Modell zur Abbildung von...
Persistent link: https://www.econbiz.de/10009484804
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New tabu search heuristics for the vehicle routing problem with trailers, multiple depots and planning periods
Scheuerer, Stephan - 2004
the new heuristics are competitive to existing approaches. The tabu search algorithm obtained better solutions for each of …Primäres Ziel dieser Arbeit war die Entwicklung neuer heuristischer Lösungsverfahren für die logistische Tourenplanung … bei restringierendem Anhängereinsatz (engl. Truck and Trailer Routing Problem). Kennzeichnend für dieses kombinatorische …
Persistent link: https://www.econbiz.de/10009450177
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Forecasting urban highway travel for year 2005
Miaou, Shaw-Pin; Rathi, A.K.; Southworth, F.; Greene, D.L. - 2008
As part of a study aimed at estimating suburban highway needs for year 2005, models were developed for forecasting daily vehicle miles of travel (DVMT) for urban areas and its distribution by highway functional class, urban location, and urban area size. A regression model combining both time...
Persistent link: https://www.econbiz.de/10009435975
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The dynamics of iterated transportation simulations
Nagel, K.; Rickert, M.; Simon, P.M. - 2009
Transportation-related decisions of people often depend on what everybody else is doing. For example, decisions about mode choice, route choice, activity scheduling, etc., can depend on congestion, caused by the aggregated behavior of others. From a conceptual viewpoint, this consistency problem...
Persistent link: https://www.econbiz.de/10009436224
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Effect of longer combination vehicles on the total logistic costs of truckload shippers
Middendorf, D.P.; Bronzini, M.S.; Jacoby, J.; Coyle, J.J. - 2009
The purpose of the research described in this paper was to examine the effects of using longer and heavier tractor-trailer combinations from the standpoint of the individual firm or shipper rather than from the viewpoint of the motor carrier. The objective was to determine the effect of longer...
Persistent link: https://www.econbiz.de/10009436563
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Optimal routing of hazardous substances in time-varying, stochastic transportation networks
Woods, A.L.; Miller-Hooks, E.; Mahmassani, H.S. - 2009
recognized in the routing decisions. Existing approaches typically assume static conditions, possibly resulting in inefficient … methodologies to the problem of routing hazardous substances. Several specific problem formulations are presented, reflecting … as more efficient heuristics that may not guarantee a Pareto-optimal solution. All procedures are systematically …
Persistent link: https://www.econbiz.de/10009436697
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Many Roads to Travel: Alternative Approaches to Route Selection for Yucca Mountain Shipments
Dilger, F.; Halstead, R. J. - 2009
This paper examines the routing implications of the potential shipment of spent nuclear fuel and high-level radioactive … cross-country highway routes identified in the DOE's Final Environmental Impact Statement and three alternative routing … scenarios. The authors evaluate these routing scenarios based on four attributes: counties, exposed populations, total county …
Persistent link: https://www.econbiz.de/10009437024
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Comparison between three different traffic micro-simulations and reality in Dallas
Nagel, K.; Pieck, M.; Simon, P.M.; Rickert, M. - 2009
It is certainly desirable that transportation forecasting models are correct in the sense that the traffic patterns they predict correspond to what would happen in reality under the circumstances assumed in the forecasting model. Unfortunately, it is notoriously difficult to transform the above...
Persistent link: https://www.econbiz.de/10009437082
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Geography-based structural analysis of the Internet
Kasiviswanathan, Shiva; Eidenbenz, Stephan; Yan, Guanhua - 2011
data, IP geolocation data sets, CAJDA's Skitter data set for backbone connectivity, and BGP routing tables. We use this … the average ratio between the routing distance and geometric distance big (around 10). (3) The weighted mean hop count is …
Persistent link: https://www.econbiz.de/10009437239