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201.
David A. Hensher Vicki Le Plastrier 《Transportation Research Part B: Methodological》1985,19(6):481-495
The emphasis on energy consumption in studies of traveller behaviour has led to increased interest in the development of policy sensitive models of automobile demand. In recognition of the fuller dimensions of automobile demand, a number of studies have considered choice amongst types of automobiles as well as number of automobiles. With rare exception, existing studies have concentrated on either type choice or number choice. In all instances the approach has been static. This paper develops a series of linked discrete-choice models to explain household automobile holdings (type and number) and adjustments in the holdings over time. The empirical study is part of an initial data effort leading up to the development of a full scale longitudinal panel of Sydney households. A model system based on a retrospective panel of 354 households, interviewed in 1980, is reported herein. The model is dynamic in the sense that it allows for prior decisions, brand loyalty and the costs of transacting. 相似文献
202.
A cooperative waiting strategy based on elliptical areas for the Dynamic Pickup and Delivery Problem with Time Windows
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The purpose of this paper to present a cooperative scheduling algorithm for solving the Dynamic Pickup and Delivery Problem with Time Windows (DPDPTW). The idea behind cooperative waiting strategies is to calculate simultaneously the waiting times for all nodes in the solution. Classical non‐cooperative scheduling algorithms perform the scheduling for each route independently of the scheduling of the other routes. We present the Cooperative Scheduling Problem (CSP) based on the elliptical areas generated by vehicles waiting at their nodes. The CSP is solved by means of a genetic algorithm and is evaluated by using a set of benchmarks based on real‐life data found in the literature. Initially, two waiting strategies are presented: Wait‐Early‐Time scheduling and Balanced‐Departure scheduling. Extensive empirical simulations have been carried out by analyzing the degree of dynamism and the average waiting time, a new concept defined to take into account the gap between the time windows of pickup and delivery nodes. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
203.
Public transit service operation strategy under indifference thresholds‐based bi‐modal equilibrium
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This paper investigates public transit service (fare and frequency) operation strategies in a bi‐modal network with assumption of indifference thresholds‐based travelers' mode choice behavior. Under such behavior, users would switch to a new mode only if its utility is larger than the utility of current mode plus a threshold. The concept of indifference thresholds‐based bi‐modal equilibrium (ITBE) and the properties of the ITBE solution are explicitly proposed. Considering transit operator's different economic objectives (profit‐maximizing, no‐deficit and total system cost‐minimizing), the effect of indifference thresholds on transit fare and frequency schemes is studied. Some numerical experiments are accompanied to verify the theoretical results. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
204.
205.
Michael Barnett David Gatfield Bent Overgaard Claire Pekcan Allan Graveson 《WMU Journal of Maritime Affairs》2006,5(2):127-142
The objective of the study was to provide, through a series of interviews with key personnel from a range of European Member
States, an overview of the following:
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Possible and actual career paths of seafarers; 相似文献
206.
介绍了南非引进在英国运营的Electrostar电动车组的结构特点及主要技术参数。 相似文献
207.
卜昕 《西安交通大学学报(英文版)》1995,(2)
NOVELPHOSPHORYLATIONSITESOFEUKARYOTICINITIATIONFACTOR-4EANDEVIDENCETHATPHOSPHORYLATIONSTABILIZESINTERACTIONSOFTHEP~25ANDP~220... 相似文献
208.
Theconceptofwirelessnetworkwasintro ducedaround 1 980 [1,2 ] ,IEEE 80 2 .1 1forWirelessLocalAreaNetwork (WLAN )was publishedinJune 1 997[3] .Nowavarietyofwirelesstechnolo giesandproductshavebeendeveloped ,theyarebe comingtheviablecomplementarysolutionstowirednetworks[1] ,suchasLANextension ,inter LANbridges,ad hocnetworking ,nomadicaccess,etc..Moreover,wirelessalsoproducesavarietyofnewapplications,suchasmobileeducation ,computing ,bankingandsoon .Anewmobilecommerceisforthcoming .Thebig… 相似文献
209.
David Jaffee 《运输规划与技术》2016,39(7):730-746
The intermodal logistics supply chain is designed to move goods from the point of production to the point of consumption as quickly and as cheaply as possible. The ability to accomplish this objective has allowed for the wholesale geographic relocation and offshoring of basic manufacturing and assembly. As a chain of linked and integrated organizations characterized by sequential interdependence, interorganizational relations play a key role in determining the level of integration and seamlessness. Yet there is one critical interorganizational link in the chain that deviates from this vision. This is the relationship between the shipping container terminal and drayage trucking operations which is better described as a form of intermodal disintegration. The weakness in this link of the supply chain is explained by the divergent industrial structures and labor market conditions, the unique nature of the transaction, and the externalization of costs to subordinate workers. 相似文献
210.
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