Temat: transportation system engineering - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A study on two-stage selection model of tourism destination at the scale of urban agglomerations
Autorzy:: Gao, Jianjie
Wang, Yongli
Zhou, Junchao
Powiązania:: https://bibliotekanauki.pl/articles/2180587.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: urban agglomerations
transportation system engineering
nested logit
travel transportation
two-stage transportation
balanced distribution
tourism
aglomeracje miejskie
systemy transportowe
turystyka
transport dwuetapowy
Opis:: Considering that the demand of tourism destination is variable on the scale of urban agglomeration, the selection process of travel destination is divided into two stages. The traditional transportation combination model based on the multinomial Logit cannot reflect this characteristic. And it is the lack of consideration of the influence of travel distribution and the dynamic transfer of passenger flow between various transport routes. Therefore, this thesis established a combination model of travel demand distribution and transportation assignment with two-stage terminal selection characteristics based on the nested Logit. Based on the analysis of tourists' trip process on the scale of urban agglomeration, a tourist flow transport network with travel destination nest structure is constructed. The generalized cost impedance function of transportation route is constructed based on the direct cost of transportation mode and the indirect cost of travel time. Based on the characteristics of two-stage destination selection of tourists, the form of travel distribution function of tourist flow is given. Through the first-order optimization conditions, it proved that the volume of travel distribution and tourism passenger transport assignment can meet the two-stage equilibrium conditions in the equilibrium state. Based on the idea of MSA algorithm, it designed the solution algorithm of the model and verified the feasibility of the model and algorithm in a simplified example. The calculation results show that the two-stage equilibrium assignment model proposed in this paper can obtain the volume of travel distribution and transportation assignment at the same time, meanwhile compared with the multinomial logit model, the nested Logit structure fully considers the attraction measure of the city destination and the scenic spot destination, which is more in line with the choice behavior of the tourists when choosing the transportation route. Thus, it provides a new comparable method for the optimal allocation of tourism passenger flow transport network resources on the scale of urban agglomeration, and can provide data support for the transportation organization plans of government decision-making departments and tourism transport enterprises.
Źródło:: Archives of Transport; 2022, 63, 3; 143--157
0866-9546
2300-8830
Pojawia się w:: Archives of Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Architecture of intelligent transportation systems in the world and in Poland
Autorzy:: Macioszek, E.
Powiązania:: https://bibliotekanauki.pl/articles/393705.pdf
Data publikacji:: 2014
Wydawca:: Polskie Stowarzyszenie Telematyki Transportu
Tematy:: intelligent transportation system
ITS architecture
road traffic engineering
inteligentny system transportowy
architektura ITS
inżynieria ruchu drogowego
Opis:: The main objectives of all the types of implementation in the field of ITS include facilitation of road traffic that results from efficient utilization of the network of roads, improving road safety and efficient services for travellers. The scope of activities within ITS systems includes road traffic management, demand management, support for management of public transportation, information for passengers, management of vehicles’ fleet, management of incidents and support for rescue teams, advanced technologies inside vehicles and problems of electronic payments and collection of tolls. The ITS applications necessitates development of a strategic basis that regulates the principles of design, implementation and decision-making. Such a basis is provided by ITS architecture. This paper presents the standardization requirements and the structure of services in terms of ITS, discusses the organizational questions concerning architecture and presents current state in terms of development of the national ITS architecture
Źródło:: Archives of Transport System Telematics; 2014, 7, 3; 22-26
1899-8208
Pojawia się w:: Archives of Transport System Telematics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fenomen górnej granicy wybuchowości (GGW) paliw w powietrzu i tlenie w warunkach podwyższonego ciśnienia i temperatury
The phenomenon of upper explosion limit of fuels in air and oxygen at elevated temperature and pressure
Autorzy:: Rarata, G.
Powiązania:: https://bibliotekanauki.pl/articles/213416.pdf
Data publikacji:: 2010
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: Instytut Techniki Cieplnej (PW)
górna granica wybuchowości paliw w powietrzu i tlenie
warunki podwyższonego ciśnienia i temperatury
EPATS Europejski System Transportu Małymi Samolotami
Institute of Heat Engineering at Warsaw University of Technology
upper explosion limit of fuels in air and oxygen
elevated temperature and pressure
EPATS European Personal Air Transportation System
Opis:: Przedstawiona paca doświadczalna została wykonana w laboratoriach Instytutu Techniki Cieplnej PW. Artykuł zawiera wyniki serii pomiarów, których celem było ustalenie wpływu wybranych parametrów fizycznych na wartość ciśnienia wybuchu dla mieszanin gazowych alkanów z tlenem. Dane takie, łącznie z wyznaczoną wartością górnej granicy wybuchowości (GGW) dla poszczególnych mieszanin, mają podstawowe znaczenie dla ustalania odpowiednich norm bezpieczeństwa w przemyśle chemicznym. Badaniom poddano gazowe alkany, a więc metan, etan, propan oraz n-butan. Wyniki, prezentowane w postaci sumarycznych danych (tabel), zostały uzyskane w wyniku przeprowadzenia pomiarów w stalowym naczyniu kulistym o objętości 2,3 dm3. Jako źródło zapłonu użyto tzw. eksplodujący drucik (exploding wire), który uwalniał około 0,1 J energii za każdym razem. Przebieg zmian ciśnienia w czasie rejestrowano przy użyciu szybkiego czujnika piezoelektrycznego. Zbadano wpływ temperatury początkowej mieszanin testowych, w zakresie od 20°C do 200°C. Przeprowadzono również pomiary w zakresie wzrastającego ciśnienia początkowego mieszanin. Na ich podstawie autor wyznaczył wyraźne zależności GGW od początkowej wartości T oraz p badanych mieszanin.
The presented research work has been done in the Institute of Heat Engineering laboratories at Warsaw University of Technology. The explosive range of chosen gases is determined by specific conditions of temperature and pressure. These values also depend on different factors, such as the shape of the explosion vessel, ignition energy or the presence of other substances which may, for instance, have catalytic properties. The obtained results relate the influence of chosen physical parameters on the value of the Upper Explosive Limit (UEL). Other research data is also presented in the paper. This was obtained from specially designed spherical explosion chamber of a volume of 2.3 dm3. Exploding wire was used as the ignition source. It released about 0.1 J energy each time. The influence of the increased initial temperatures of those mixtures on their value of UEL was also investigated in the range of 20°C up to 200°C. Further experiments on the influence of elevated conditions, as well as the position of ignition source and residence time, were carried out as well. A number of higher alkanes were examined (up to n-butane), both in air and oxygen mixtures. These experiments allowed the author to find distinct dependencies in the values of UEL under the investigation conditions. The results have been compared and validated with literature data and numerical code, according to the experimental conditions, methodology and adopted criteria of UEL determination. Some of the effects found were possible to explain only by acceptance of such phenomenon as cool flames appearing in the regions close to UEL. This seems to be particularly important when safety parameters or numerical modelling standards for UEL are sought.
Źródło:: Prace Instytutu Lotnictwa; 2010, 2 (204); 1-70
0509-6669
2300-5408
Pojawia się w:: Prace Instytutu Lotnictwa
Dostawca treści:: Biblioteka Nauki

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