scholarly journals ALGORITHM FOR CHOOSING TRACTION ROLLING-STOCK FOR RAILWAY LINE RAIL BALTICA / PREKINIŲ ŠILUMVEŽIŲ MAGISTRALEI „RAIL BALTICA“ PARINKIMO ALGORITMAS

2012 ◽  
Vol 4 (4) ◽  
pp. 386-390 ◽  
Author(s):  
Stasys Steišūnas ◽  
Gintautas Bureika
Keyword(s):  
Geometric Mean ◽  
Freight Transportation ◽  
Weight Coefficient ◽  
Evaluation Methods ◽  
Rolling Stock ◽  
Technical Data ◽  
Railway Line ◽  
Multi Criteria Evaluation ◽  
Ecological Aspects ◽  
Simple Additive Weighting

The article analyses traction rolling-stock for freight transportation presently used by AB Lietuvos geležinkeliai. The paper explores and compares technical data on the above mentioned rolling-stock and estimates exploitation expenses. Following an assessment of forecasting freight flows on the future railway line Rail Baltica, an algorithm for selecting traction rolling-stock is proposed. The efficiency of locomotives operating on the railway is determined taking into account three multi-criteria evaluation methods: the sum of ratings, simple additive weighting and geometric mean method. Locomotives are estimated in accordance with technical, economic and ecological aspects. The results of possible performance efficiency of rolling stock have been determined changing weight coefficient values of the criteria. Santrauka Straipsnyje nagrinėjami šiuo metu AB ,,Lietuvos geležinkeliai“ kroviniams vežti naudojami traukos riedmenys: analizuojami ir lyginami techniniai duomenys, vertinamos eksploatavimo sąnaudos. Įvertinus krovinių srautų prognozes tiesiamoje ,,Rail Baltica“ geležinkelio magistralėje, pasiūlytas traukos riedmenų kroviniams vežti parinkimo algoritmas. Šilumvežių šioje magistralėje naudojimo efektyvumas nustatomas trimis daugiakriterio įvertinimo metodais: vietų sumos metodu, rodiklių įverčio metodu ir geometrinio vidurkio metodu. Šilumvežiai vertinami techniniais, ekonominiais ir ekologiniais aspektais. Keičiant kriterijų svarbos koeficientų reikšmes, nustatyti skirtingi riedmenų panaudojimo efektyvumo rezultatai.

scholarly journals Smart Urban Mobility System Evaluation Model Adaptation to Vilnius, Montreal and Weimar Cities

2022 ◽  
Vol 14 (2) ◽  
pp. 715
Author(s):  
Simona Zapolskytė ◽  
Martin Trépanier ◽  
Marija Burinskienė ◽  
Oksana Survilė
Keyword(s):  
Smart City ◽  
Evaluation Model ◽  
Evaluation Methods ◽  
Urban Mobility ◽  
Analytic Hierarchy ◽  
Multi Criteria Evaluation ◽  
Mobility System ◽  
Smart Mobility ◽  
Simple Additive Weighting ◽  
Hierarchical Evaluation

To date, there is no developed and validated way to assess urban smartness. When evaluating smart city mobility systems, different authors distinguish different indicators. After analysing the evaluation indicators of the transport system presented in the scientific articles, the most relevant and influential indicators were selected. This article develops a hierarchical evaluation model for evaluating a smart city transportation system. The indicators are divided into five groups called “factors”. Several indicators are assigned to each of the listed groups. A hybrid multi-criteria decision-making (MCDM) method was used to calculate the significance of the selected indicators and to compare urban mobility systems. The applied multi-criteria evaluation methods were simple additive weighting (SAW), complex proportional assessment (COPRAS), and technique for order preference by similiarity to ideal solution (TOPSIS). The significance of factors and indicators was determined by expert evaluation methods: the analytic hierarchy process (AHP), direct, when experts evaluate the criteria as a percentage (sum of evaluations of all criteria 100%) and ranking (prioritisation). The evaluation and comparison of mobility systems were performed in two stages: when the multi-criteria evaluation is performed according to the indicators of each factor separately and when performing a comprehensive assessment of the smart mobility system according to the integrated significance of the indicators. A leading city is identified and ranked according to the smartness level. The aim of this article is to create a hierarchical evaluation model of the smart mobility systems, to compare the smartness level of Vilnius, Montreal, and Weimar mobility systems, and to create a ranking.

scholarly journals Selected aspects of proper integration between ERTMS/ETCS on-board and trackside devices.

2019 ◽  
Vol 294 ◽  
pp. 05008
Author(s):  
Dominik Adamski ◽  
Andrzej Białoń ◽  
Zwadka Łukasz
Keyword(s):  
Member State ◽  
Operating Conditions ◽  
Rolling Stock ◽  
Railway Line ◽  
Rail Vehicles ◽  
Rail System ◽  
Technical Solutions ◽  
Compliance Tests ◽  
Research Institute

Achieving the interoperability of the European rail system requires many measures to unify technical solutions as well as regulations in each Member State. However, there is a possibility of some incompatibilities between individual subsystems despite generating them in accordance with unified applicable requirements. It is possible that the interoperable rolling stock will not be able to move freely over the interoperable railway line due to some incompatibilities and differences in the versions of the installed firmware in the ERTMS/ETCS system devices. In connection with the above the correct integration of rail vehicles with track-side equipment should be examined by means of tests under operating conditions. The article presents compliance tests of the correct integration of the on-board subsystem with the track-side subsystem which are carried out by the Railway Research Institute.

scholarly journals Operational criteria in the justification of electrification of railway lines

2018 ◽  
Vol 180 ◽  
pp. 06005
Author(s):  
Andrzej Massel
Keyword(s):  
Rolling Stock ◽  
The Political ◽  
Economic Factors ◽  
Single Track ◽  
Railway Network ◽  
Railway Line ◽  
Passenger Traffic ◽  
Post War ◽  
Operational Criteria ◽  
Double Track

The process of electrification of the Polish railways took place from 1936 till early 1990s. Despite the political constraints of the post-war times, the decisions on electrification of particular sections of the railway network were usually based on economic factors. In 1970s and 1980s so called electrification thresholds were used to justify the need for electrification of railway line in question. They took into the number of tracks (single-track lines, double-track lines), terrain conditions (flat terrain, upland terrain) and the traffic structure (the share of passenger traffic) into account. In the framework of National Railway Program till 2023 (KPK) the realization of electrification projects have been undertaken again. The present paper deals with importance of the operational criteria in the decision-making concerning justification of electrification of railway lines. These criteria include the shortening of the journey times on particular sections, shortening of stops on the stations with the change of the type of traction, the savings of train operating companies resulting from the traction unification (change of demand for rolling stock and for workshops for its servicing), improvement of reliability and punctuality of services.

Electric apparatus and circuits of rolling stock

2020 ◽  
Author(s):  
Aleksandr Maznev ◽  
Oleg Shatnev
Keyword(s):  
Professional Education ◽  
Rolling Stock ◽  
Educational Institutions ◽  
Technical Data ◽  
Traction Motors ◽  
Semiconductor Converters ◽  
Electric Rolling Stock ◽  
Railway Workers ◽  
Element Base ◽  
Electrical Apparatus

Provides information about technical data and design of electrical apparatus of control, monitoring and protection of traction motors of electric rolling stock (EPS), the principles of speed control of locomotives and trains with contactor-resistor and semiconductor converters based on modern element base, a circuit diagram of various types of EPS with manifold and induction motors in modes of traction and braking. For students of institutions of secondary professional education. It may be useful to students of higher educational institutions, courses of improvement of qualification, the railway workers related to the maintenance and repair of rolling stock.

scholarly journals THE INTEGRATED EVALUATION OF THE MACRO ENVIRONMENT OF COMPANIES PROVIDING TRANSPORT SERVICES

Transport ◽  
2008 ◽  
Vol 23 (3) ◽  
pp. 266-272 ◽  
Author(s):  
Algis Žvirblis ◽  
Virgilija Zinkevičiūtė
Keyword(s):  
Quantitative Evaluation ◽  
Freight Transportation ◽  
Strategic Marketing ◽  
Expert Evaluation ◽  
Primary Analysis ◽  
Transport Services ◽  
Factors Influencing ◽  
Evaluation Models ◽  
Simple Additive Weighting ◽  
Significant Factors

The article presents the main principles of the integrated evaluation of macro environment components and factors influencing the performance of transport companies as well as providing the validated quantitative evaluation models and results obtained in evaluating the macro environment of Lithuanian companies providing transport services. Since quantitative evaluation is growing in importance, the process of developing the principles and methods of business macro environment quantitative evaluation is becoming relevant from both theoretical and practical perspectives. The created methodology is based on the concept of macro environment as an integrated whole of components, formalization and the principle of three‐stage quantitative evaluation. The methodology suggested involves the quantitative evaluation of primary factors and macro environment components as an integral dimension (expressed in points). On the basis of this principle, an integrated macro environment evaluation parameter is established as its level index. The methodology integrates the identification of significant factors, building scenarios, a primary analysis of factors, expert evaluation, the quantitative evaluation of macro environment components and their whole. The application of the multi‐criteria Simple Additive Weighting (SAW) method is validated. The integrated evaluation of the macro environment of Lithuanian freight transportation companies was conducted. As a result, the level indices of all components as well as the level index of macro environment considered as a whole of components were identified. The latter reflects the extent of deviation from an average level of a favourable macro environment. This is important for developing strategic marketing decisions and expanding a strategic area.

SOME PROBLEMS OF ORGANIZATION OF ACCOUNTING AND CONTROL OF FREIGHT TRANSPORTATION SERVICES’ IMPLEMENTATION BY SMALL ENTERPRISES

2017 ◽  
Author(s):  
Maria Olshanska ◽  
◽  
Anna Tereshchenko ◽  
Keyword(s):  
Internal Control ◽  
Small Businesses ◽  
Freight Transportation ◽  
Spare Parts ◽  
Small Enterprise ◽  
Rolling Stock ◽  
Sources Of Information ◽  
Transportation Services ◽  
Services Implementation ◽  
And Control

Constant changes in economic and legal conditions of management, the complexity of accounting of the freight transportation services’ implementation, require further study in terms of organization of accounting and control, taking into account the characteristics of the industry and belonging to a small enterprise. The purpose of the article is to identify problem areas in the process of organizing the accounting and control of the freight transportation services by small businesses, and also finding ways to solve them. The result of the study is identified and substantiated the following problem areas of freight transportations’ accounting and control, taking into account the characteristics of the industry and belonging to small businesses: cumbersome regulations; specifics of cost accounting; organization of internal control. In particular, it has been established, that the legislative system is rather cumbersome and outdated; also needs improvement taking into account the conditions of globalization of states’ economies, deregulation of freight transportation in Ukraine, protection of workers during pandemic. Based on the study of the regulatory framework, grouped regulatory and regulatory documents for the freight transportation services’ regulation in terms of articles for calculating of the freight transportation services’ costs. Generalized sources of information for effective internal control of cargo transportation of the transport enterprise by the accounting service are offered, taking into account the limited financial resources of small businesses. Emphasis is placed on the need to take into account in the organization of such control such sectoral features as: a large share in non-current assets of rolling stock, accounting of the costs of its maintenance and storage; accounting of fuel and lubricants and spare parts; accompanying flight loading.

Participatory, Multi-Criteria Evaluation Methods as a Means to Increase the Legitimacy and Sustainability of Land Use Planning Processes. The Case of the Chaco Region in Salta, Argentina

2016 ◽  
Vol 59 (2) ◽  
pp. 307-324 ◽  
Author(s):  
Lucas Seghezzo ◽  
Cristian Venencia ◽  
E. Catalina Buliubasich ◽  
Martín A. Iribarnegaray ◽  
José N. Volante
Keyword(s):  
Land Use ◽  
Land Use Planning ◽  
Evaluation Methods ◽  
Multi Criteria Evaluation ◽  
Chaco Region ◽  
Planning Processes

Multi-Criteria Evaluation Methods

2000 ◽  
pp. 19-43
Author(s):  
Martin Rogers ◽  
Michael Bruen ◽  
Lucien-Yves Maystre
Keyword(s):  
Evaluation Methods ◽  
Multi Criteria Evaluation

scholarly journals Monitoring of current collectors on the railway line

Transport ◽  
2016 ◽  
Vol 33 (1) ◽  
pp. 177-185 ◽  
Author(s):  
Krzysztof Karwowski ◽  
Mirosław Mizan ◽  
Dariusz Karkosiński
Keyword(s):  
Current Collector ◽  
Operating Conditions ◽  
Rolling Stock ◽  
Overhead Line ◽  
Railway Transport ◽  
Safe Operation ◽  
Measuring Point ◽  
Current Collectors ◽  
Railway Line ◽  
Periodic Inspections

Proper cooperation the current collectors and the overhead line is a pre-requisite for reliable and safe operation of railway transport. Instances of maladjustment and, in some cases, damage to the current collectors, occur between periodic inspections of the rolling stock. In order to detect such anomalies quickly, the test stand was developed, with the aim of monitoring the technical state of the current collectors under operating conditions. The detection procedure is based on the monitoring and analysis of contact wire uplift caused by the pressure of the current collector, as the train passes through the measuring point located on the railway line and is designed with the aim of detecting collectors with incorrect values of a contact force.

scholarly journals Electrodynamics of Reactive Power in the Space of Inter-Substation Zones of AC Electrified Railway Line

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3510
Author(s):  
Mykola Kostin ◽  
Anatolii Nikitenko ◽  
Tetiana Mishchenko ◽  
Lyudmila Shumikhina
Keyword(s):  
Electromagnetic Fields ◽  
Electromagnetic Waves ◽  
Reactive Power ◽  
The Body ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Railway Line ◽  
Frontal Part ◽  
Electric Rolling Stock ◽  
Electric Traction

In railway traction, the definition of “electromagnetic field” is functionally connected to the concept of the reactive power consumed by the electric rolling stock, and characterized by the running and standing electromagnetic waves in the space of the inter-substation zones from the site of the AC traction system. Such a definition is established and theoretically justified by the theory of electromagnetic fields. This article uses the methodology of this theory, in particular, a method for power balance estimation in electromagnetic fields based on Maxwell’s equations, as well as methods for the analysis of running and standing electromagnetic waves based on the theory of reflection, propagation and transmission of plane harmonic waves. The research considers the regularities of standing electromagnetic waves in the space of inter-substation zones of electric traction systems, which occur due to the incomplete reflection of incident waves from the contact wire and metal parts of the roof surface and the frontal part of the body of the electric rolling stock. The flow of electricity to the roof surface and the frontal part of the body of an electric locomotive is considered. The possibility of using existing methods to reduce wave reflections and thereby to effectively compensate for reactive power in the space of inter-substation zones is discussed.

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