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Wyświetlanie 1-15 z 54
Tytuł:
Computer simulation of transport impact on environment
Symulacja komputerowa wpływu transportu na środowisko naturalne
Autorzy:
Łatuszyńska, M.
Strulak-Wójcikieiwcz, R.
Powiązania:
https://bibliotekanauki.pl/articles/374137.pdf
Data publikacji:
2014
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
computer simulation
transport
environment
symulacja komputerowa
środowisko
Opis:
The paper presents a computer simulation as an effective method for testing the impact of transport on the environment. It shows the concept of a simulation model that allows the integration of different approaches and methods used in the discussed context, pointing to the System Dynamics (SD) as a suitable technique to formalize the model. Simulation modeling in the SD convention allows for the simultaneous estimation of all impacts of transport on the environment in the dynamic approach.
Artykuł przedstawia symulację komputerową jako efektywną metodę badania wpływu transportu na środowisko naturalne. Zaprezentowano w nim koncepcję modelu symulacyjnego pozwalającego na integrację różnych podejść i metod stosowanych w omawianym kontekście, wskazując na Dynamikę Systemową jako odpowiednią technikę formalizacji modelu. Modelowanie symulacyjne w konwencji systemowo-dynamicznej umożliwia jednoczesne szacowanie wszystkich skutków wywoływanych przez inwestycje transportowe w środowisku naturalnym w ujęciu dynamicznym.
Źródło:
Transport Problems; 2014, 9, 1; 37-47
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer Simulations of Electron Transport through a Nanowire Quantum Dot
Autorzy:
Łapa, D.
Sowa, A.
Adamowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1811952.pdf
Data publikacji:
2008-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.63.Nm
Opis:
Electron tunneling through a quantum dot embedded in a nanowire was studied by the transfer matrix method. A smoothness of the interfaces was taken into account using the analytical parametrization of the potential profile. We calculated the current-voltage characteristics and discussed the effect of the spacer, which separates the quantum dot from the contacts. We found that the tunneling current peak possesses the asymmetric Fano resonance shape in the absence of spacer. The results of calculations agree with the experimental data.
Źródło:
Acta Physica Polonica A; 2008, 114, 5; 1213-1218
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aided maintenance management for transport telematics systems
Autorzy:
Siergiejczyk, M.
Rosiński, A.
Powiązania:
https://bibliotekanauki.pl/articles/298033.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
maintenance
transport telematic system
computer aided engineering
Opis:
Issues concerning maintenance of transport telematics systems were presented in this paper. They normally operate under various conditions. They need to be reliable as they are required for transport processes to be uninterrupted. Make sure key reliability and maintenance parameters are sustained is on of chief issues. Up to this point, the authors carried out reliability and maintenance analyses of transport telematics systems. They were also successful in developing a computer application supporting strategy for maximising the availability factor.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2014, 17(3); 293-303
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of Markov chains of kth row in computer management of transport in a supply chain
Autorzy:
Topolski, M.
Powiązania:
https://bibliotekanauki.pl/articles/393723.pdf
Data publikacji:
2017
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
supply chain
internal transport
Markov chain
łańcuch dostaw
transport wewnętrzny
łańcuch Markowa
Opis:
At present a supply chain poses quite a challenge. The paper presents one the methods supporting decision makers in a supply chain, namely a Markov chain of kth row. This theory constitutes an important part of the law of probability and it is also associated with soft calculation methods e.g. fuzzy sets. It may be applied in numerous fields e.g. physics, genetics, meteorology and technical disciplines. The Markov chain method may be used when assumptions about independence of events and random variables cannot be made. Thanks to this method social-economic phenomena may be predicted. These characteristics made the author attempt to create a model based on the Markov chains of kth row in a supply chain. The focus was on sales planning accounting for safety stocks planning and various characteristic of this supply chain.
Źródło:
Archives of Transport System Telematics; 2017, 10, 4; 47-51
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer implementation of mass transport in Matlab environment for modeling Epitaxial growth process with moving boundary problem
Autorzy:
Gulkowski, S.
Powiązania:
https://bibliotekanauki.pl/articles/1940715.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska
Tematy:
moving boundary problem
computational modeling
epitaxial growth
Opis:
Due to the possibility of producing high quality and low cost silicon substrates the Epitaxial Lateral Overgrowth technology may find its application in the photovoltaic industry. However, a lateral growth process depends on many technological parameters such as the temperature of the system, the cooling rate, the solvent or the geometry of the mask. For this reason finding optimized settings for these factors in experimental research is difficult and time consuming. Numerical analysis of the growth process leads to better understanding of the fundamentals of the growth process. For this reason a computational model of epitaxial growth was proposed. This paper focuses on the accuracy of the numerical solution of the mass transport process during epitaxial growth. The method was implemented in the Matlab environment for the moving boundary application. The results of the calculations are presented.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2015, 19, 1; 15-23
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessing the risk of the transport of radioactive material
Autorzy:
Berg, H. P.
Powiązania:
https://bibliotekanauki.pl/articles/2069441.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
transport
transport modes
probabilistic safety assessment
risk-informed decision making
transport computer code
spent fuel
radioactive waste
Opis:
Transport of dangerous goods are always under critical observation of the public, in particular in case of transport of spent fuel or radioactive waste. In both cases transports are often crossing borders of countries, e.g., waste resulting from reprocessing of spent fuel. The transports could take place by ships, trucks, rails and airplanes and these options and the resulting risks are compared. Transport risk includes health and safety risks that arise from the exposures to workers and members of the public to radiation from shipments Moreover, it is shown that the more modern approach of risk-informed decision making elaborated for application to nuclear installations can also be applied to assess the risk of the transport of radioactive material.
Źródło:
Journal of Polish Safety and Reliability Association; 2012, 3, 1; 89--100
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
SIMULATION INVESTIGATION OF CONSEQUENCES FOLLOWING FROM TRANSPORT DECISIONS
Autorzy:
Łatuszyńska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/453505.pdf
Data publikacji:
2009
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
computer simulation
transport decisions
Opis:
Different methods can be employed while investigating the consequences of transport decisions- for instance simulation methods. There are various techniques of formalizing the simulation model, from computer languages of general use and specialist simulation languages, to advanced functional simulation packages and systems. In order to illustrate the possibilities of using computer simulation model to investigate the consequences following from transport decisions, System Dynamics technique has been employed in the present article.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2009, 10, 1; 153-162
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization methods in maritime transport and logistics
Autorzy:
Lisowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/259728.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
maritime transport
optimization
ship control
computer simulation
Opis:
The purpose of the article is to present the goal of optimization of transport and logistics processes, followed by literature review in the field of optimization methods. The optimization methods were categorized and the most commonly used methods were listed. The tasks of static and dynamic optimization were formulated. An example of the single-criterion static and dynamic optimization and multi-criteria game optimization are given.
Źródło:
Polish Maritime Research; 2018, 4; 30-38
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
COMPUTER SUPPORT OF TRANSPORTATION OF HEAVY AND OVERSIZE SHIPMENTS
Autorzy:
Soušek, Radovan
Dvořák, Zdeněk
Fiedler, Tomáš
Powiązania:
https://bibliotekanauki.pl/articles/503672.pdf
Data publikacji:
2006
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
transport
computer support
oversize shipments
Opis:
The paper deals with transportation of heavy and oversize shipments on the part of algorithm development and software solution.
Źródło:
Logistics and Transport; 2006, 3, 2; 63-66
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A model for assessing the environmental impact of transport
Autorzy:
Łatuszyńska, M.
Strulak-Wójcikiewicz, R.
Powiązania:
https://bibliotekanauki.pl/articles/406671.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
transport
environment
computer simulation
Opis:
Environmental effects of transport, with a particular focus on the natural environment have been discussed. The authors present methods for assessing the influence of investments in transport infrastructure on the environment, as well as the concept of a simulation model which integrates various methods and approaches used to assess the impact of such investments on the environment.
Źródło:
Operations Research and Decisions; 2013, 23, 2; 67-80
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer aid decision-making in inland navigation
Autorzy:
Skupień, E.
Powiązania:
https://bibliotekanauki.pl/articles/360441.pdf
Data publikacji:
2014
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
inland waterway transport
water management
fuel consumption
inland navigation
computer aid system
Opis:
The article discusses the problem of computer aided decision making processes in inland waterway transport. Inland waterway transport is of minor importance in the Polish transport system. One of the reason for this is the difficulty in making decisions about transportation. This is due to the high variability of navigational conditions on Polish waterways, thus the low reliability of this mode of transport. This does not change the fact that the inland waterway transport of bulk goods, oversized and hazardous materials is the most efficient and least burdensome means of transport. For this reason, one should aim to increase the share of freight with the use of inland vessels. The paper indicates the possibility of supporting decision making processes in the organization of inland waterways transportation. For shippers or other persons organizing transport of goods, various issues can be important: the cost of transportation, delivery or handling method. Often, due to the lack of appropriate tools transportation is directed to the cars. Access to appropriate computer programs that calculate of the some parameters for the carriage or optimization criteria, may increase the use of inland waterway transport, and consequently a reduction in external and social costs, associated with carriage of cargo. The paper describes the possibilities.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 37 (109); 77-81
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Computer system for managing the sugar beet transport to sugar factory
Autorzy:
Marczuk, A.
Powiązania:
https://bibliotekanauki.pl/articles/244157.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
agriculture
system
optimization
sugar-beet
Opis:
An appropriate solving the transport organization in agriculture requires, among others, to work out the method for transportation means work organization. Issues associated with transportation means work organization is impossible to be optimally solved by a controller in the case of developed transport network, instead they require computational techniques for fast information processing. One of such methods is presented in the paper as a system for sugar--beet transport to sugar works. In sugar industry, large amounts of raw material are transported between sugar-beet producers or storage centers and processing works. Presented program makes possible to select transportation means for carrying the sugar-beet, and then working out the schedule of routes realized by vehicles. The paper presents the management system of sugar-beet transporting to the sugar works that optimizes the transportation means work. Minimization of courses length, because it directly affects the reduction of transportation costs by means of decrease of fuel and other exploitation parts used, shortening the driver's work-time, and decrease of fees for vehicle rental. The system was verified using real data for a given day, which confirmed the correctness of the software functioning. Working out and launching the software required to write databases containing necessary information on: sites the material was received from, amount of transported loads, transportation means, loading/reloading machines and devices along with their technical and exploitation parameters, as well as the project required to draw digital map with all analyzed purchase centers, sugar works, and all the road network. Minimization of routes was accepted as a purpose function, because it directly affects the reduction of transport costs through reducing the fuel and other exploitation means used, shortening the driver's work time or decreasing the fees for vehicle rental. The system was verified using real data for a particular date, which confirmed the correctness of the software functioning. Activity aiming at reducing production costs through elimination of unnecessary expenditures resulting from bad work organization would contribute to the improvement of competitiveness of Polish agriculture and enhancing its opportunities on EU markets. Proposed system for sugar-beet transport management at Sugar Works is an example of the system meeting such expectations.
Źródło:
Journal of KONES; 2008, 15, 2; 301-309
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Particle swarm methods for transport and logistics optimization processes
Wielokryterialna optymalizacja gry wieloetapowej
Autorzy:
Lisowski, Józef
Powiązania:
https://bibliotekanauki.pl/articles/27309780.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Technologiczno-Humanistyczny im. Kazimierza Pułaskiego w Radomiu
Tematy:
transport
logistics
optimization
computer science
logistyka
optymalizacja
informatyka
Opis:
This article describes heuristic approaches to static optimization methods, taking into account the nature of the motion of a swarm of particles representing, for example, birds, ants, bees, fireflies, bats, krill, cuckoos, cuttlefish, cockroaches, or the pollination process of flowers. In the given descriptions of the methods, the features of swarm intelligence are detailed, the optimization quality indicators are formulated, and flow charts of the computational algorithms are provided.
W artykule przedstawiono heurystyczne metody optymalizacji statycznej wykorzystujące naturalne zasady ruchu roju cząstek – ptaków, mrówek, pszczół, świetlików, nietoperzy, kryli, kukułek, mątw, karaluchów i zapylania kwiatów. Dla każdej z metod opisano cechę inteligencji roju, przedstawiono postać funkcji celu oraz podano zasadę działania algorytmu optymalizacji.
Źródło:
Journal of Automation, Electronics and Electrical Engineering; 2023, 5, 1; 21--34
2658-2058
2719-2954
Pojawia się w:
Journal of Automation, Electronics and Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dispersive charge transport in hopping systems under open-circuit conditions: computer simulation
Dyspersyjny transport ładunku w układach przeskokowych w warunkach obwodu otwartego: symulacja komputerowa
Autorzy:
Bąk, G. W.
Powiązania:
https://bibliotekanauki.pl/articles/296536.pdf
Data publikacji:
2012
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
ruchliwość dryftowa elektronów
transport dyspersyjny
low-mobility materials
dispersive transport
Opis:
Applicability of the theories describing the discharge in thin-film insulators under open-circuit conditions for dispersive hopping systems is the subject of this paper. It is shown by means of computer simulation that the drift mobility obtained from application of the theories for such systems is underestimated. The computer simulation was carried out for a thin film system in which the charge transport is dominated by hopping of charge carriers among localized states in a narrow band at the Fermi level. The way of interpretation of the discharge under opencircuit conditions in such systems is suggested. The simulation results have also been applied for interpretation of the open-circuit discharge in thin diamond-like carbon films.
Badano stosowalność teorii opisujących rozładowanie cienkich warstw izolatorów z przeskokowym transportem ładunku w warunkach obwodu otwartego. Pokazano, że wartości ruchliwości otrzymane w wyniku zastosowania tych teorii do układów dyspersyjnych są niedoszacowane. Symulację wykonano dla układów, w których transport przeskokowy odbywa się w wąskim paśmie w pobliżu poziomu Fermiego. Otrzymane wyniki zastosowano do reinterpretacji wyników badań ruchliwości w warstwach DLC.
Źródło:
Scientific Bulletin. Physics / Technical University of Łódź; 2012, 33; 5-17
1505-1013
2449-982X
Pojawia się w:
Scientific Bulletin. Physics / Technical University of Łódź
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 54

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