Naslov
Computer-Supported Modelling of Multimodal Transportation Networks Rationalization

Autori
Zelenika, Ratko ; Vukmirović, Slavomir ; Mujić, Hilmija

Izvornik
Promet - Traffic & transportation (0353-5320) 19 (2007), 5; 277-288

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, prethodno priopćenje, znanstveni

Ključne riječi
Intermodal transportation ; transportation networks ; spreadsheets ; mathematical modelling programming languages ; Lingo ; Solver

Sažetak
This paper deals with issues of shaping and functioning of the computer programs in the modelling and solving of multimodal transportation network problems. A methodology of an integrated use of a programming language for mathematical modelling is defined, as well as spreadsheets for the solving of complex multimodal transportation network problems. The paper contains a comparison of the partial and integral methods of solving multimodal transportation networks. The basic hypothesis set forth in this paper is that the integral method results in better multimodal transportation network rationalization effects, whereas a multimodal transportation network model based on the integral method, once built, can be used as the basis for all kinds of transportation problems within multimodal transport. As opposed to linear transport problems, multimodal transport network can assume very complex shapes. This paper contains a comparison of the partial and integral approach to transportation network solving. In the partial approach, a straightforward model of a transportation network, which can be solved through the use of the Solver computer tool within the Excel spreadsheet interface, is quite sufficient. In the solving of a multimodal transportation problem through the integral method, it is necessary to apply sophisticated mathematical modelling programming languages which support the use of complex matrix functions and the processing of a vast amount of variables and limitations. The LINGO programming language is more abstract then the Excel spreadsheets, and it requires a certain programming knowledge. The definition and presentation of a problem logic within Excel, in a manner which is acceptable to computer software, is an ideal basis for modelling in the LINGO programming language, as well as a faster and more effective implementation of the mathematical model. This paper provides proof for the fact that it is more rational to solve the problem of multimodal transportation networks by using the integral, rather then the partial method.

Izvorni jezik
Engleski

Znanstvena područja
Ekonomija

POVEZANOST RADA