2011, volume 12 #2. "Transport and Telecommunication". Журнал издательства TSI, ISSN 1407-6160, ISSN 1407-6179 | TSI

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2011, volume 12 #2. "Transport and Telecommunication". Журнал издательства TSI, ISSN 1407-6160, ISSN 1407-6179

 

APPLICATION OF THE FUZZY DECISION TREES FOR THE TASKS OF ALTERNATIVE CHOICES

Oleksandr Dorokhov1, Vladimir Chernov2

1Kharkiv National University of Economics Kharkiv, Ukraine E-mail: aleks.dorokhov@meta.ua

2Vladimir State University Vladimir, Russia

The article deals with solving the alternative choice problem on the base of fuzzy decision trees or fuzzy positional games, which peculiarity lies in using fuzzy quality estimation of decisions consequence and nature states. The proposed approach and numerical algorithm can be used for a large number of transport services problems. Among them, there are the investment decisions in the transport sector, the choice of types of trucks, cars, buses etc, the choice of variants for transportation organization, financial services problems and others. Corresponding example of practical calculations in the specialized program Fuzicalc for fuzzy numbers has been given and described.

Keywords: alternative choice problem, fuzzy decision trees, fuzzy positional games, Fuzicalc program

OPTIMIZATION OF RELATIVE TRANSPORT COSTS OF A HYPOTHETICAL DRY PORT STRUCTURE

Ville Henttu, Lauri Lättilä and Olli-Pekka Hilmola*

*Corresponding author
Lappeenranta University of Technology Department of Industrial Management
Kouvola Unit Prikaatintie 9, 45100 Kouvola, Finland Fax: +358 5 344 4009, www.kouvola.lut.fi
E-mail: ville.henttu@lut.fi, olli-pekka.hilmola@lut.fi, lauri.lattila@lut.fi

Decreasing environmental emissions originated from transportation sector plays a big role in the strategies of EU. One way to decrease emissions is to shift freight transport from unimodal road transport to intermodal solutions. Dry port concept aims at increasing rail transport between seaports and inland intermodal terminals, which are called dry ports. Such a concept is in infancy in Finnish transportation network. The main transport mode used in Finland is unimodal road transport. The aim of this research is to study the effects of a hypothetical dry port structure in Finnish transportation network. The effects are researched with different gravitational models. They apply linear integer programming, and heuristics to find relative transport costs in each situation. Differences in road and rail network, and road and rail transport modes are taken into account. The results of the models argue that Finland could benefit from dry port network. Cost-efficiency of the Finnish transportation network could be enhanced by using up to five or six dry ports. In addition, by replacing road transport with rail transport the environmental impacts can be lowered considerably. However, by alternatively utilizing within wider scale dense seaport network of Finland, we could achieve even better environmental results – approach which has been neglected so far in the dry port literature.

Keywords: Dry port concept, Finnish transportation network, gravitational models, costs of transport, intermodal transport, optimization, linear integer programming

SHORT-TERM TRAFFIC FORECASTING WITH NEURAL NETWORKS

Irina Klevecka

Riga Technical University
Faculty of Electronics and Telecommunications
Riga, Latvia Ph.: +371 26006970, e-mail: klevecka@inbox.lv

The paper is dedicated to an advanced algorithm aimed at short-term forecasting of electronic communications traffic by applying non-linear neural networks. The algorithm incorporates three procedures, which allow automating the process of determining an optimal solution with minimal involvement and influence of expert assessment and human factors.

Keywords: telecommunications, electronic communication networks, traffic, neural networks, multilayer perceptron, algorithm, forecasting

APPLICATION OF THE SPATIAL STOCHASTIC FRONTIER MODEL FOR ANALYSIS OF A REGIONAL TOURISM SECTOR

Dmitry Pavlyuk

Transport and Telecommunication Institute
Lomonosova str. 1, Riga, LV-1019, Latvia
Ph.: +371 29958338. E-mail: Dmitry.Pavlyuk@tsi.lv

This research is devoted to an econometric analysis of competition and cooperation on the regional tourism market between regions within the Baltic States (Estonia, Latvia, Lithuania). We estimate the relative regional efficiency levels of tourists’ attraction and discovered factors affecting them. We propose an econometric approach called Spatial Stochastic Frontier, which corresponds to a spatial modification of a stochastic frontier model. The study includes three alternative specifications of the spatial stochastic frontier model: distance-based, travel-time based, and border-based. It is intended to identify the influence of existing transport networks on research results. On the base of the models’ estimation results we analyse region-specific factors (tourism infrastructure, employment, geographical position and natural attractions) which affect the numbers of visitors and estimate regions’ efficiency values. We discover a significant level of inefficiency of tourists’ attraction in Baltic States region and propose some ways to improve the situation.

Keywords: spatial stochastic frontier, efficiency, competition, cooperation, regional tourism, transport network

CONDITIONS AND PROPOSALS OF TARIFF INTEGRATION FOR THE INTEGRATED TRANSPORT SYSTEMS IN THE SLOVAK REPUBLIC

Bibiána Poliaková

University of Žilina, Faculty of Operation and Economics of Transport and Communications
Department of Road and Urban Transport
Univerzitná 8215/1, 01 26 Žilina, the Slovak Republic
Ph.: +421-41-513 3535. E-mail: bibiana.poliakova@fpedas.uniza.sk

The integrated transport systems are the solution of decreasing utilization of public passenger transport in many cities and areas around the cities not only in the countries of the European Union. The statistics figures of using the public passenger transport in Slovakia have the decreasing tendency in the last 10-15 years. There were performed some experiments to create the integrated transport systems in Slovakia but they were not developed anymore. The presented article analyses the conditions for implementing the integrated transport systems in Slovakia with focusing on tariff integration. It points out the key elements in creation of integrated transport system to be attractive for passengers and to be advantageous to the transporters.

Keywords: integrated transport system, public passenger transport, tariff system

COMPARATIVE ANALYSIS OF APPROACHES TO ANALYTICAL MODELLING OF TRAFFIC FLOWS AT AN INTERSECTION

Ivan Ruskevich

Transport and Telecommunication Institute
Lomonosova str. 1, Riga, LV-1019, Latvia
Ph.: +371 29798172. E-mail: ivan.ruskevich@gmail.com

Different approaches to analytical modelling of traffic flows at an intersection are considered. The general principles are outlined, the set of existing models is presented. Results obtained by different models are compared to the data received from the experiment. The recommendations for practical usage of the presented models are made.

Keywords: highway intersection, queuing models

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