2010, VOLUME 11 #1. "TRANSPORT AND TELECOMMUNICATION". ЖУРНАЛ ИЗДАТЕЛЬСТВА TSI, ISSN 1407-6160, ISSN 1407-6179 | TSI

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2010, VOLUME 11 #1. "TRANSPORT AND TELECOMMUNICATION". ЖУРНАЛ ИЗДАТЕЛЬСТВА TSI, ISSN 1407-6160, ISSN 1407-6179

ACOUSTIC SIGNALS PROCESSING AND APPLIANCE FOR THE PROBLEM OF TRAFFIC FLOW MONITORING 

Alexander Grakovski, Victor Ovchinnikov, Sergey Kamenchenko

Transport and Telecommunication Institute
Lomonosova Str.1, Riga, LV-1019, Latvia
Ph.: +371 67100654. Fax: +371 67100535.
E-mail: avg@tsi.lv

The increase of road traffic in the European Union focuses for creating intelligent transportation systems of traffic control in local, urban and regional level. The possibility of using acoustic sensors for traffic intensity measurements are discussed in this article. Acoustic signal detector, such as an ordinary household microphone, is used as the most inexpensive sensor version for stationary and mobile traffic surveillance systems. The examples of the acoustic signals records from different types of road vehicles in various weather conditions are described here. The simplified modification of acoustic microphone’s signals spectral processing algorithm and noise filtering are solved. Detection of moving road vehicles results, using records for their acoustic signals, is also discussed. The restrictions of using acoustic sensors to estimate traffic parameters are established.

Keywords: intelligent transport system, transport flow surveillance, vehicle detecting, acoustic signal, digital signal processing

URBAN TRANSPORT ECOLOGY FACTORS, ECOLOGICAL PROJECTS, AND THEIR IMPACTS ON THE ECOLOGICAL SITUATION IN LATVIA 

Stanislav Grishin, Oleg V. Schiptsov

Transport and Telecommunication Institute
Lomonosova Str. 1, Riga, LV-1019, Latvia

Transport and industry are among the most important factors influencing the contemporary ecological situation. The analysis of this influence is impossible without monitoring the conditions of change in the environment. In different countries, measures of ecological regulation have been undertaken. These require significant expenditure. One of the most interesting projects concerning ecological regulation and the comparative analysis of ecological risk is 'The Californian project'. In this project, proposals on the economic criteria for evaluating the measures of risk reduction have been developed. Attention is drawn to different programs used to monitor the ecological situation in Latvia. In the research the analysis of 10-12 years of statistical data is carried out. Data analysis suggests a tendency towards an improvement in the ecological situation. In Latvia, the mechanisms for financing ecological programs, which are aimed at decreasing the levels of harmful pollution in the atmosphere, are based on the experience of the USA and European countries. This research evaluates the relationship between the financing of ecological programs and the ecological situation in Latvia.

Keywords: ecology, environment pollution, ecological laws, ecological statistics for Latvia, analysis of statistics

A FUZZY APPROACH AND MODELLING OF SERVICE ESTIMATIONS FOR DRUGS FREIGHT TRANSPORTATION 

Oleksandr Dorokhov1, Ludmila Dorokhova2, Eugenia Zorina1

1Kharkiv National University of Economics
prospekt Lenina 9-A, Kharkiv, 61001, Ukraine
E-mail: aleks.dorokhov@meta.ua

2National Pharmaceutical University
Kharkiv, Ukraine
E-mail: dorohova@meta.ua

Expedience of quality estimation of transport service in the conditions of narrow-mindedness, unclear, incompleteness of information and competition environment at the market of transport services on the basis of fuzzy sets is grounded. The parameters of quality of implementation of freight transportations are certain. The two-tier model of determination of integral quality of freight transportations on the basis of unclear design is built. The computer’s realization of the fuzzy approach and correspondent model with the use of expert’s fuzzy estimations is performed by facilities of the software environment MATLAB fuzzy logic toolbox.

Keywords: drugs freight transportation, fuzzy modelling, transport service quality, MATLAB fuzzy logic toolbox

IMPROVEMENT OF RAILWAY SAFETY BY APPLYING THE ADVANCED TECHNOLOGIES 

Aldona Jarasuniene

Transport Research Institute
Vilnius Gediminas Technical University
Plytines 27, LT-10105, Vilnius-16, Lithuania
Ph.: +370 2745076. Fax: +370 2699711
E-mail: ajarasuniene@yahoo.com

Only modern transport can reliably perform cargo and ensure efficiency and total safety of the economic process. Information technologies provide us with new possibilities in organizing transport work. Information systems can be used for electronic data registration of cargo. The necessity of mobile transport systems analysis is base on globalisation and integration process: interconnection of various types of vehicles and their management in order to obtain more effective, safe and mobile freight monitoring and it is the creation of intelligent transport sector.

Keywords: information technologies, mobile transport system, railway traffic management, control and security systems

ЕXPERT SYSTEMS FOR EVALUATING THE AIRCRAFT POWER PLANTS’ TECHNICAL СONDITION 

Eugene Kopytov, Vladimir Labendik, Sergey Yunusov

Transport and Telecommunication Institute
Lomonosova Str. 1, Riga, LV-1019, Latvia
Ph.: +371 67100590. Fax: +371 67100660.
E-mail: tsi@tsi.lv

In the given paper there are considered some types of diagnostics systems: mathematical, stochastic and logical, which can be used in developing expert systems for evaluating the aircraft power plants’ technical state as demonstrated by the engines ТВ-3-117 and PS-90А

Keywords: air gas-turbine engine, technical maintenance, control of parameters, automated diagnostics system, expert system, decision-making system, diagnostics matrix

DEVELOPMENT OF RIGA-MINSK TRANSPORT CORRIDOR SIMULATION MODEL 

Irina Yatskiv, Mihail Savrasov

Transport and Telecommunication Institute
Lomonosova Str. 1, Riga, LV-1019, Latvia Ph.: +371 29654003.
E-mail: mms@tsi.lv

This paper deals with the developed cargo traffic macroscopic simulation model. The goal of model development is to analyse and study Riga-Mink transport corridor. This transport corridor is an important transport arterial between Latvia and Republic of Byelorussia. The growth of goods movement between these countries also could be explained by transit characteristics of both countries. The duration of transport corridor on Latvian territory is approximately 300 km. The corridor crosses a lot of small and large cities and that is why the question of its functioning performance exists. The simulation model was developed using specialised simulation software called PTV VISION VISUM. VISUM uses the transport model that defines requirement for input data. The developed model consists of transport network model and demand model. The demand model is presented by two origin destination matrices, which have been calibrated using TFlowFuzzy algorithm. Further calibrated model has been used to estimate two development scenarios using different output data of VISUM.

Keywords: transport corridor, macroscopic model, simulation, bottlenecks, development scenarios, TFlowFuzzy
 

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