Temat: urban transport simulation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Simulation model of the means of transport maintenance process
Autorzy:: Landowski, B.
Powiązania:: https://bibliotekanauki.pl/articles/247753.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: modelling
operation and maintenance process
transport system
urban public transport
computer simulation
Opis:: The real operation and maintenance processes of technical objects are characterised by so called secondary action, it means that the values of the features describing the process states and the analysed operation and maintenance states of technical objects as well as the after-effect ofthose states depend not only on their present state, but very often on the state or sequence of the previous states, too. In spite of the fact that the mathematical models of the real processes are intrinsically a significant simplification of the actual state, it however seems that omission of a secondary action in a certain class of operation and maintenance processes is an excessive simplification and the results obtained from investigations of models of that type may be affected by a significant error. The paper presents a model of operation and maintenance process of means of transport characterised by a secondary action as well as an example of computer simulation of performance of a stochastic process describing the features of the operation and maintenance process under analysis. The elaborated model of operation and maintenance process of technical objects takes into account the specificity of the systems of the urban bus transport. The computer simulation of the maintenance process enables, among other things, to estimate the values of the chosen indicators characterising the investigated process. On the basis of the analysis of the statistical data, obtained from the operation and maintenance investigations, the values of the essential input parameters of the model were estimated. The considerations presented in the paper include an assumption that it is possible to distinguish n disjoint subsets ofhomogenous objects, from the point of view of the investigation purpose, in the set of the technical objects being operated and maintained in the system under analysis. The investigation object is a system of operation and maintenance of means of transport.
Źródło:: Journal of KONES; 2010, 17, 4; 271-276
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analizy symulacyjne zmian w funkcjonowaniu systemu transportu w miastach
The simulation analysis of transportation system development in cities
Autorzy:: Szarata, A.
Powiązania:: https://bibliotekanauki.pl/articles/193398.pdf
Data publikacji:: 2012
Wydawca:: Stowarzyszenie Inżynierów i Techników Komunikacji Rzeczpospolitej Polskiej
Tematy:: transport miejski
model czterostadiowy
modele aktywności
modelowanie symulacyjne
urban transport
four stage model
activity based models
simulation modelling
Opis:: Rozbudowa systemu transportowego w miastach wymaga bardzo wysokich nakładów finansowych oraz przemyślanej polityki transportowej. Wiąże się to z koniecznością podejmowania decyzji, których konsekwencje dla efektywności w przemieszczaniu się osób (i pośrednio towarów) mogą być bardzo dotkliwe. Aby zminimalizować ryzyko przyjęcia błędnych lub nieefektywnych rozwiązań, coraz częściej stosuje się transportowe modele symulacyjne miast lub aglomeracji. Pozwalają one na testowanie możliwych rozwiązań i wskazują na kolejność oraz etapowanie inwestycji bez konieczności angażowania wysokich nakładów finansowych. Właściwie opracowany i skalibrowany model symulacyjny może stanowić bardzo dobre narzędzie wspomagające proces decyzyjny i minimalizujące ryzyko podjęcia niewłaściwych kroków. Niniejszy artykuł ma na celu przedstawienie podstawowych problemów, z jakimi wiąże się proces budowy modelu czterostadiowego, jako najczęściej stosowanego podejścia w warunkach krajowych. W artykule w sposób syntetyczny przedstawiono poszczególne etapy modelowania oraz wskazano na jego słabości. Przedstawiono również alternatywne, wobec ujęcia czterostadiowego, ujęcie bazujące na modelach aktywności. Krótko scharakteryzowano ten sposób modelowania i podkreślono rolę rozbudowanej bazy danych, jaka jest wymagana w tego typu analizach.
The development of transportation system in the agglomerations requires significant financial resources and well-considered transportation strategy. It is related to the necessary decisions, resulting very acutely to the effectiveness of transportation system. To minimize the risk of wrong and ineffective decisions, procedures of support tools in the form of transportation system' simulation models in the city (or agglomeration) are used often and often. It enables to verify different solutions and proposes phasing of planned investments without risk of improper implementations. Well developed and calibrated simulation model may be treated as a promising tool supporting political decisions in the investment process. In the paper four stage' model, commonly used in Polish conditions as well as characteristies of each stage and their weak points have been presented. Also principles of activity based approach and requirements for its proper implementation have been described in the article.
Źródło:: Transport Miejski i Regionalny; 2012, 11; 44-48
1732-5153
Pojawia się w:: Transport Miejski i Regionalny
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Reconstruction of delivery positions in the city of Celje, Slovenia
Wiederaufbau von dem lieferposition in stadt Celje, Slowenien
Autorzy:: Dragan, D.
Vizinger, T.
Intihar, M.
Kramberger, B.
Fosner, M.
Prah, K.
Powiązania:: https://bibliotekanauki.pl/articles/374228.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: location problems
maximal covering problems
optimization
simulation
GIS
urban freight transport
problemy lokalizacji
optymalizacja
symulacja
miejski transport towarowy
Opis:: The paper addresses the problem of the reconstruction and allocation of delivery positions in the urban area. The aim is to achieve the optimal reorganization of urban freight transport in old town core in the municipality of Celje. Optimal allocation relies on optimization based on the Monte Carlo simulation and represents a first stage of a two-stage optimization approach to re-design the existing urban freight transport. The number of optimal delivery positions is required to be as minimal as possible, which can still assure a maximal service area within the prescribed radius, while keeping the minimal walking distances of delivery personnel between the nearest delivery position and the customer’s physical location. The main issues of the used heuristic allocation algorithm and the presentation of calculated results are provided. In the near future, the calculated delivery positions are going to be used for the purpose of physical implementation in order to improve the existing delivery transport.
Der Artikel behandelt das Problem der Wiederaufbau und Allokation von den Lieferung Positionen in einem städtischen Gebiet. Der Zweck ist die optimale Reorganisation des städtischen Güterverkehrs im alten Stadtkern in der Gemeinde Celje zu Erreichen. Die optimale Allokation basiert auf der Optimierung auf Basis der Monte-Carlo-Simulationen und stellt die erste Stufe einer zweistufigen Optimierung Verfahren zur Re-Designs der bestehenden städtischen Güterverkehrs. Die Anzahl der optimalen Lieferpositionen sollte so wenig wie möglich sein, aber trotzdem einen maximalen Service-Bereich innerhalb des vorgeschriebenen Radius gewährleisten. Gleichzeitig sollte die Entfernung zwischen den nächstgelegenen Lieferpositionen und Kunden Positionen kleinstmöglich sein. Die wichtigsten Themen des verwendeten Heuristic Zuordnungsalgorithmus und die Darstellung der berechneten Ergebnisse sind gegeben. Die Standorte der berechneten Lieferung Positionen werden zum Zwecke der physikalischen Implementierung genutzt, um den bestehenden Güterverkehr zu verbessern
Źródło:: Transport Problems; 2013, 8, 2; 11-23
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A study on cooperation of urban transport means: PRT and light rail
Autorzy:: Grabski, W.
Daszczuk, W. B.
Powiązania:: https://bibliotekanauki.pl/articles/375485.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: personal rapid transit
light urban rail
transport means cooperation
urban transport simulation
Opis:: It is difficult to organize urban transport in the city center. Existing buildings, narrow streets and working infrastructure make it difficult to use the oldfashion transport means such as trams or buses. The new idea consists in elevation of the transport in the very city above ground level (typical PRT systems cover rare areas like airport or fairgrounds). The study analyzes the hierarchical, layered system consisting of a ring light rail and PRT (Personal Rapid Transit) serving as commuter network. It is shown in the case of an exemplary city that the proposed solution is possible and reasonable. Ridership and vehicle mileage of the entire system are calculated for the light rail analytically, and in the case PRT by simulation.
Źródło:: Transport Problems; 2017, 12, 4; 5-14
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Information support of decision making in urban passenger transport management
Autorzy:: Nemtinov, V.
Nemtinova, Y.
Borisenko, A.
Mokrozub, V.
Powiązania:: https://bibliotekanauki.pl/articles/374753.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: urban transport network
information system
SIMUL8
simulation mathematical model
miejska sieć transportowa
system informacji
Opis:: In this paper, we examine the problems of simulating modeling of urban transport route network operation and development of an information system for automating the process of modeling and processing of simulation results with SIMUL8 software. In order to solve this problem, it is required to solve the following set of related tasks: formal description of the urban transport systems structure and parameters of its functioning, development of mathematical models of urban transport network performance, database structure and an algorithm for simulation model creation.
Źródło:: Transport Problems; 2017, 12, 4; 83-90
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Application of MCDA/MCDM methods for an integrated urban public transportation system – case study, city of Cracow
Autorzy:: Kiciński, M.
Solecka, K.
Powiązania:: https://bibliotekanauki.pl/articles/224089.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: urban transport
public transportation system
transportation integration
transportation planning
transportation simulation
Cracow
transport miejski
system transportu miejskiego
integracja transportu
planowanie transportu
symulacja transportu
Kraków
Opis:: The paper presents the application of the Multiple Criteria Decision Aid/Making (MCDA/MCDM) methodology in the assessment of the development of different scenarios for an urban public transportation system (UPTS). This methodology allows considering several conflicting objectives and performing the evaluation process in a comprehensive manner. This approach also corresponds to the holistic philosophy: different aspects (economic, technical, social etc.) and interest groups – stakeholders (operators, passengers, city government etc.). The MCDA/MCDM methodology is specifically customized to the real life case study – urban public transportation system in the city of Cracow (Poland). A family of 10 criteria is proposed to evaluate several solutions (W) for a UPTS in terms of their usefulness and attractiveness for different stakeholders. These criteria take into account: travel time and standard, effectiveness of the fleet use, environment friendliness, the level of integration and reliability of the UPTS, safety and security, the profitability and availability of the UPTS, investment costs. Considering the possible solutions, the 6 alternatives were designed heuristically and compared with the current state (denotation of alternative W0). Based on the analysis, for the final considerations compared with the current alternative, 7 new solutions of the integrated urban public transportation in Cracow were adopted, denoted as: W1 (bus/rail alternative: integration of high-speed agglomeration rail with bus transportation), W2 (rail/tram/bus alternative: integration of high-speed agglomeration rail with tram and bus transport system), W3 (alternative with the underground: integration of the underground with high-speed agglomeration rail and with tram and bus transport system), W4 (tram/rail alternative: integration of high-speed agglomeration rail with tram transport), W5 (Tram alternative: integration of tram transport with bus transport), W5A (tram alternative: sub-alternative to the alternative W5, integration of tram transport), W6 (dual-mode tram alternative: integration of dual-mode tram transport). The variants of the scenarios for the urban public transportation system were generated by VISUM computer macro-simulation software. The computational experiment was carried out with the practical application of different Multiple Criteria Decision Aid/Making methods: AHP (Expert Choice program) and Electre III (software package Diviz).
Źródło:: Archives of Transport; 2018, 46, 2; 71-84
0866-9546
2300-8830
Pojawia się w:: Archives of Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Effective harvesting of braking energy in electric cars
Autorzy:: Trzaska, Z.
Powiązania:: https://bibliotekanauki.pl/articles/242744.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: urban transport
environmental protection
electric cars
energy harvesting
braking energy recovering
damping energy recovering
supercapacitor
simulation
transport miejski
ochrona środowiska
samochody elektryczne
zbieranie energii
odzyskiwanie energii hamowania
odzyskiwanie energii tłumienia
superkondensator
symulacja
Opis:: Regenerative braking and damping are effective approaches for electric cars to extend their driving range. A disk Faraday generator regenerative braking strategy integrated with controlled charging of a supercapacitor is developed in this article to advance the level of energy-savings on the car board. The kinetic energy of the car suspension during driving regenerated effectively to electric energy by using shock absorber is harvested and then used to charge the vehicle’s battery, the power electronics and the supercapacitor. One of the advantages of supercapacitors is their high power capability, which is applicable for high rate of charging and discharging operations like motor starting and regenerative braking of an electric vehicle. This article presents a new charging method for supercapacitors. Common for regenerative braking and damping chargers for supercapacitors are usually equipped with electronic PWM converter performing two states of operation per switching cycle. A simple open-loop control system is applicable for the whole charging state. The proposed circuit consists of a minimum number of components. It is free of stability problem and protects itself from being overloaded by supercapacitor with zero initial charge. Simulation results for regenerative braking processes corresponding to three velocity tests are included.
Źródło:: Journal of KONES; 2018, 25, 1; 407-422
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Improving the effectivity of urban freight transport by means of cellular automata simulations
Autorzy:: Kijewska, K.
Małecki, K.
Powiązania:: https://bibliotekanauki.pl/articles/1833875.pdf
Data publikacji:: 2020
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Tematy:: urban freight transport
loading/unloading bay
computer simulation
cellular automata
miejski transport towarowy
dok załadunkowo-rozładunkowy
symulacja komputerowa
automaty komórkowe
Opis:: Unloading bays are one of the most popular and simple to implement solutions to support development of sustainable urban freight transport systems. The solution is aimed at reducing congestion on busy city streets, which is often caused by freight vehicles that, in an attempt to load or unload their cargoes, park directly in traffic lanes. Where dedicated unloading bays are in place, the traffic is undisturbed, which helps to prevent extra consumption of energy and fuel, and thus extra pollution, and which also makes it possible to avoid wasting time in traffic jams and ensuing costs. Therefore, the major benefit derived from this solution is its contribution to reduction of traffic congestion, followed by a perceptible decrease in pollutant emissions. This article aims at developing an algorithm for recommended distribution of unloading bays based on the reported locations of delivery points and parameters related to varied quantities of goods and the number of available parking spaces in the vicinity of unloading bays. Additionally, it addresses the issue of using unloading bays as EV charging stations. The proposed solution was implemented on the basis of a dedicated road traffic simulator based on the original cellular automaton model..
Źródło:: Archives of Transport System Telematics; 2020, 13, 1; 20--25
1899-8208
Pojawia się w:: Archives of Transport System Telematics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Navigating the future: Evaluating two-level transport solutions for sustainable urban development
Autorzy:: Stashkiv, Mykola
Tson, Oleg
Łakomy-Zinowik, Marta
Basta, Michał
Powiązania:: https://bibliotekanauki.pl/articles/27324301.pdf
Data publikacji:: 2023
Wydawca:: Fundacja Centrum Badań Socjologicznych
Tematy:: two-level transport solution
Ternopil bypass road
simulation modelling
PTV Vissim
public-private partnerships
sustainable urban development
traffic flow
Opis:: Purpose: The purpose of this paper is to propose and evaluate two options for two-level transport solutions at the intersection of the bypass road and the Pidvolochyske Highway in Ternopil, Ukraine. The aim is to address the issues associated with the current road network passing through residential zones and present an optimal resolution for the intersection. Methodology: The methodology involves using the PTV Vissim software to conduct simulation modelling. The transport and operational indicators of the two options for two-level transport solutions, an elongated loop and two interconnected rings, are compared across different traffic intensities. Results: The results show that the transport solution with two roundabouts exhibits superior characteristics, particularly under high traffic flow conditions. The strengths and limitations of each solution are comprehensively delineated, encompassing factors like efficiency, cost-effectiveness, safety measures, and ecological impacts. Theoretical contribution: The paper contributes to advancing knowledge and practice in two-level transport solutions. It provides valuable insights for developing the transportation system in Ternopil and other post-conflict cities. The advantages and disadvantages of public-private partnerships (PPP) as a tool for attracting investments and innovations in transportation infrastructure are also discussed. Practical implications: The findings of this research can be used by professionals in transportation, urban planning, and ecology for infrastructure development. It also serves as a valuable resource for residents of Ternopil interested in fostering improvements to their city’s quality of life.
Źródło:: Journal of Sustainable Development of Transport and Logistics; 2023, 8, 2; 91--112
2520-2979
Pojawia się w:: Journal of Sustainable Development of Transport and Logistics
Dostawca treści:: Biblioteka Nauki

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