1. Computer-supported modelling of multimodal transportation networks rationalizationRatko Zelenika, Slavomir Vukmirović, Hilmija Mujić, 2007, drugi znanstveni članki Opis: This paper deals with issues of shaping and functioning of 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 straight forward 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 than the Excel spreadsheet, 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 than the partial method.
Ključne besede: intermodal transportation, transportation networks, spreadsheets, mathematical modelling, programming languages, Lingo, Solver
Objavljeno v DKUM: 01.06.2017; Ogledov: 1387; Prenosov: 120
 Celotno besedilo (5,11 MB)
Gradivo ima več datotek! Več... |
2. MINIMIZACIJA TRANSPORTNIH STROŠKOV Z IZBIRO OPTIMALNE LOKACIJEPetra Vacac, 2013, diplomsko delo Opis: Delo diplomskega seminarja je razdeljeno na teoretični del in praktični del.
Teoretični del diplomskega seminarja je razdeljen na tri poglavja. V prvem poglavju smo se posvetili razlaganju, kaj so transportni stroški, delitvi transportnih stroškov, vidikov transportnih stroškov, dejavnikov, ki vplivajo na transportne stroške, dinamiki transportih stroškov glede na prevoženo razdaljo. V drugem poglavju smo predstavili vrste skladišč, dejavnike, ki vplivajo na izbiro lokacije skladišč ter postopek izbire skladišč. V nadaljevanju pa smo tretje poglavje namenili podrobnejši predstaviti transportnega problema.
Največ pozornosti smo namenili praktičnemu delu, kjer smo določili lokacijo hladilnic in trgovskih centrov, določili smo transportne stroške na posameznih relacijah; nato smo se s pomočjo računalniškega programa LINGO, lotili računanja skupnih minimalnih transportnih stroškov za posamezne transportne probleme. Ti izračuni so nam pokazali, katera lokacija je z vidika transportnih stroškov optimalna.
Ključne besede: transportni stroški, transportni problem, optimizacija transportnih stroškov, izbor optimalne lokacije glede na transportne stroške, program LINGO
Objavljeno v DKUM: 29.10.2013; Ogledov: 1903; Prenosov: 225
Celotno besedilo (1,16 MB) |
3. |
4. |
5. |
6. |
