نتایج جستجو برای: transportation demand

تعداد نتایج: 199160  

Journal: :Computers & OR 2014
Rachida Abounacer Monia Rekik Jacques Renaud

This paper considers a three-objective location-transportation problem for disaster response. The location problem aims at determining the number, the position and the mission of required humanitarian aid distribution centers (HADC) within the disaster region. The transportation problem deals with the distribution of aid from HADCs to demand points. Three conflicting objectives are considered. ...

2002
Reginald R. Souleyrette

The first large-scale transportation studies were performed in the 1950s. This occurrence coincided with the development of the digital computer, which by that time had progressed such that large amounts of data could be manipulated and analyzed. Computing has progressed rapidly since, so that today more detailed and computationally demanding models of large metropolitan areas can be executed o...

سعیدی, لیلا, مرجانی, تیمور, مینو, علیرضا, پورعابدی, محمدرضا,

Considering the current problems in the field of transportation in Tehran, this paper attempts to develop a sustainable technology assessment model in Tehran’s urban transport sector. The research was carried out in a mixed method. In the qualitative phase, using the principles of the data theory of the foundation, identifying the important components in the technology evaluation and compiling ...

2014
Jiang Wu Jingfeng Li J. Wu J. F. Li

In this paper, dynamic facility location and supply chain planning are studied through minimizing the costs of facility location, path selection and transportation of coal under demand uncertainty. The proposed model dynamically incorporates possible changes in transportation network, facility investment costs, operating cost and changes in facility location. In addition, the time variation and...

2013
Carl Henrik Häll Jan T. Lundgren Peter Värbrand Carl H. Häll

Integrated public transportation service is a new interesting form of service combining a fixed route service with a demand responsive service. When designing such a service it is important to analyze and evaluate how the attractiveness and operating costs for the service depend on the type of demand responsive service used, the design parameters related to the fleet of vehicles, the structure ...

2013
Anna Nagurney Min Yu Panos M. Pardalos

In this paper, we developed a supply chain network game theory model with differentiated products and transportation costs in the case of time-based oligopolistic competition. The firms are profit-maximizers and have, as their strategic variables, the product shipments and the guaranteed delivery times to the consumers at the demand markets with the guaranteed delivery times never exceeding the...

Journal: :اقتصاد پولی مالی 0
بختیار جواهری اسعد اله رضایی

eiarnination the oil market and review the major oil importer countries, is a major need for guidance and marketing strategy for crude oil exporting countries. so that estimating the oil demand for importer countries and analysis the effective factors on their oil demand, can be an important factor in planning and policy making for oil exporting countries in order to sell oil. so iran is not an...

Askari, M. T., Azfanizam Binti Ahmad, S., Lee, L. S., Rahimi, I., Sharaf, Adel.m, Tang, S. H.,

It is necessary to consider the impact of demand uncertainty to model the comprehensive approach for supply chain network design. This paper presents four echelons, multiple commodity, and strategic–tactical model for designing supply chain network. Uncertain demand, transportation mode selection with lead time configuration has been considered. A numerical example has been implemented to verif...

2012
Galina Merkuryeva

Integrated solutions for product delivery planning and scheduling in distribution centres are proposed and built on a cluster analysis and simulation optimisation methodology. A cluster analysis of product demand data of stores is used to identify typical dynamic demand patterns and product delivery tactical plans. Further, simulation optimisation techniques are applied to find optimal paramete...

Journal: :Math. Meth. of OR 1999
Mihály Hujter Bettina Klinz Gerhard J. Woeginger

In this note we investigate the computational complexity of the transportation problem with a permutable demand vector, TP-PD for short. In the TP-PD, the goal is to permute the elements of the given integer demand vector b = (b1; : : : ; bn) in order to minimize the overall transportation costs. Meusel and Burkard [4] recently proved that the TP-PD is strongly NP-hard. In their NP-hardness red...

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