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Wyszukujesz frazę "traffic characteristics" wg kryterium: Temat

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    Wyświetlanie 1-8 z 8
    Tytuł:
    Research on capacity of mixed vessels traffic flow based on vessel-following theory
    Autorzy:
    Zhao, C.
    Yan, H.
    Zhou, G.
    Liu, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2211979.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    vessel traffic flow
    vessel-following theory
    vessel traffic
    vessel-following sequence
    traffic characteristics
    follow theoretical analysis diagram
    maritime traffic engineering
    traffic flow theory
    Opis:
    In order to study the characteristics of mixed vessel traffic flow, based on classical head distance model and probability analysis, by studying the combination time head way of different vessel-following sequences, the capacity model of mixed vessels traffic flow was established. Through analyzing two representative types of vessels, research results indicate that the capacity of mixed traffic increase with the traffic flow speed in a certain speed range, but the increasing trend slow down. The closer length and inertial stopping distance of different kind vessels are, the more capacity of mixed traffic increases. And the influence of reaction time on the capacity is related to proportion of different kind vessels.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 3; 535--539
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Practical aspects of measuring critical gaps and follow-up times at median uncontrolled T-intersections
    Autorzy:
    Barchański, Adrian
    Żochowska, Renata
    Powiązania:
    https://bibliotekanauki.pl/articles/2091231.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    uncontrolled intersection
    measurement of traffic characteristics
    gap acceptance theory
    critical gap
    follow-up time
    skrzyżowanie niekontrolowane
    pomiar charakterystyki ruchu
    teoria akceptacji luki
    luka krytyczna
    czas obserwacji
    Opis:
    Estimation of critical gaps and follow-up times between vehicles at uncontrolled intersections is an essential step in estimating the capacity of these objects and assessment of traffic conditions. Therefore, measurements of these parameters should be properly prepared and implemented. This paper presents issues related to the performance of field tests at median uncontrolled T-intersection. Measurements included both critical gaps and follow-up times. Based on the collected material, the authors identified problems occurring during traffic observation. Analyzed intersections were located both within and outside built-up areas. Furthermore, this article discusses the influence of selected factors on the accuracy of estimating the critical gaps and follow-up times and formulates the principles of conducting traffic measurements at selected types of intersections.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 113; 17--28
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exploratory and confirmatory analysis to identify airports and airlines characteristics as factors influencing of domestic passenger traffic in Nigeria
    Autorzy:
    Adenigbo, Adedotun Joseph
    Ofumwengbe, Osahenrumwen
    Kanyio, Olufunto Adedotun
    Powiązania:
    https://bibliotekanauki.pl/articles/2141209.pdf
    Data publikacji:
    2022
    Wydawca:
    Fundacja Centrum Badań Socjologicznych
    Tematy:
    domestic airports
    airport characteristics
    airline services
    passenger traffic
    Opis:
    Passenger traffic at airports is characterised by fluctuations resulting from the influence of several factors. The influence of each factor is different, leading to unpredictable passenger traffic patterns that make planning difficult. Previous studies used geographic, demographic, and economic variables as exploratory factors to examine air travel demand. The study explores several variables to confirm airports and airlines’ characteristics as demand factors for domestic air travel in Nigeria. Data for the study were collected by administering a questionnaire to respondents at major domestic airports in Nigeria. The variables were presented in the 5-point Likert Scale for respondents to rank in order of significance. Exploratory and confirmatory factor analyses (EFA and CFA) were employed to identify the significant factors affecting passenger traffic at domestic airports in Nigeria. EFA reduced fifteen variables to four orthogonal factors influencing passenger traffic at domestic airports. CFA validates airport and airline services, demographics, economic factors, and airport size and facilities as significant factors affecting passenger traffic at domestic airports in Nigeria. The model fit test shows CMIN/DF = 2.263; CFI = 0.940; GFI = 0.929; NFI = 0.901; and RMSEA = 0.078. The result identifies airport and airline characteristics as factors influencing passenger traffic at the domestic airport in any country. It implies that airport and airline characteristics significantly influence domestic air traffic and needs to be included in modelling. Identifying airport and airline characteristics as air travel determinants make this study unique for policy decisions to forecast domestic passenger traffic in a country.
    Źródło:
    Journal of Sustainable Development of Transport and Logistics; 2022, 7, 1; 36-50
    2520-2979
    Pojawia się w:
    Journal of Sustainable Development of Transport and Logistics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    State of health, fatigue, psychophysical, and psychological characteristics, and their influence on road traffic safety. An evaluation attempt
    Autorzy:
    Pawelec, Kazimierz
    Powiązania:
    https://bibliotekanauki.pl/articles/2046781.pdf
    Data publikacji:
    2021-09-20
    Wydawca:
    Akademia Sztuki Wojennej
    Tematy:
    road traffic safety
    road safety rules
    psychological characteristics
    road rage
    Opis:
    In analysing the causes of the dangers posed in road traffic, which often end up in accidents or other road incidents, we focus on evidence of violated road safety rules. This is an oversimplification of the problem, since it does not allow for getting to know the determinants of indicated violations which often come down to the broadly assessed state of health of road users, their psychophysical characteristics and personality, as well as their fatigue and mental state. The author of this paper not only analyses the aforesaid problems from the legal point of view, but also tries to look at them in an interdisciplinary way. The author further demonstrates how little we know about it; hence without in-depth exploration of the subject, preceded by credible scientific research, it will be extremely difficult to take reasonable preventive measures, whilst deterring with severe sanctions simply does not work.
    Źródło:
    Cybersecurity and Law; 2021, 5, 1; 117-127
    2658-1493
    Pojawia się w:
    Cybersecurity and Law
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Working and Health Conditions of Italian Air Traffic Controllers
    Autorzy:
    Costa, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/90974.pdf
    Data publikacji:
    2000
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    air traffic control
    shift work
    health
    personal characteristics
    kontrola ruchu lotniczego
    praca zmianowa
    zdrowie
    Opis:
    The paper summarises some studies carried out in recent years on Italian air traffic controllers. Work stress appeared related mainly to mental charge, aggravated by time pressure and high responsibility. Shiftwork was not considered highly stressful, thanks to the good shift schedules adopted. The disorders most frequently complained of had a prevalent psychosomatic component, concerning the digestive, neuropsychic, and cardiovascular systems. However, their prevalence was lower than, or similar to, that recorded in general population. The controllers engaged in regional centres showed slightly worse health conditions than those engaged in airport towers; the same was found in the radar controllers compared to those working in non-radar positions.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2000, 6, 3; 365-382
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selection process as a key human aspect in air traffic control
    Autorzy:
    Langr, David
    Ploch, Jindřich
    Rudolf, Petr
    Szabo, Stanislav
    Vajdova, Iveta
    Powiązania:
    https://bibliotekanauki.pl/articles/375526.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    air traffic control
    air traffic controller
    aviation
    selection
    aptitudes testing
    required profile characteristics
    kontrola ruchu lotniczego
    kontroler ruchu lotniczego
    lotnictwo
    selekcja
    testowanie umiejętności
    wymagane cechy profilowe
    Opis:
    The article deals with the characteristics of the provision of air traffic services (in member states of European Civil Aviation Conference (ECAC)), as one of the main subject supporting global tourism, as well as with the selection of suitable candidates for the air traffic controller profession and the means and methods that are being used for the selection of eligible candidates. The authors present an original elaboration of approaches to selection processes in the Czech Republic in the context of the current development of European security and the perception of the human factor as a critical element of security and safety in air transport. In doing so, the authors use content analysis, as the results of empirical surveys present the results of discrete research surveys and evaluations based on explorative methods.
    Źródło:
    Transport Problems; 2019, 14, 3; 75-84
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An adaptive k nearest neighbour method for imputation of missing traffic data based on two similarity metrics
    Autorzy:
    Wang, Yang
    Xiao, Yu
    Lai, Jianhui
    Chen, Yanyan
    Powiązania:
    https://bibliotekanauki.pl/articles/949848.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    missing traffic data
    similarity metrics
    K-nearest neighbour method
    stochastic characteristics
    metoda porównywania danych
    metryki podobieństwa
    metoda najbliższego sąsiada
    cechy stochastyczne
    Opis:
    Traffic flow is one of the fundamental parameters for traffic analysis and planning. With the rapid development of intelligent transportation systems, a large number of various detectors have been deployed in urban roads and, consequently, huge amount of data relating to the traffic flow are accumulatively available now. However, the traffic flow data detected through various detectors are often degraded due to the presence of a number of missing data, which can even lead to erroneous analysis and decision if no appropriate process is carried out. To remedy this issue, great research efforts have been made and subsequently various imputation techniques have been successively proposed in recent years, among which the k nearest neighbour algorithm (kNN) has received a great popularity as it is easy to implement and impute the missing data effectively. In the work presented in this paper, we firstly analyse the stochastic effect of traffic flow, to which the suffering of the kNN algorithm can be attributed. This motivates us to make an improvement, while eliminating the requirement to predefine parameters. Such a parameter-free algorithm has been realized by introducing a new similarity metric which is combined with the conventional metric so as to avoid the parameter setting, which is often determined with the requirement of adequate domain knowledge. Unlike the conventional version of the kNN algorithm, the proposed algorithm employs the multivariate linear regression model to estimate the weights for the final output, based on a set of data, which is smoothed by a Wavelet technique. A series of experiments have been performed, based on a set of traffic flow data reported from serval different countries, to examine the adaptive determination of parameters and the smoothing effect. Additional experiments have been conducted to evaluate the competent performance for the proposed algorithm by comparing to a number of widely-used imputing algorithms.
    Źródło:
    Archives of Transport; 2020, 54, 2; 59-73
    0866-9546
    2300-8830
    Pojawia się w:
    Archives of Transport
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of the queueing network with a random waiting time of negative customers at a non-stationary regime
    Autorzy:
    Naumenko, V.
    Matalytski, M.
    Kopats, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/122923.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    G-network
    positive customers
    negative customers
    random waiting time
    heavy-traffic regime
    state probabilities
    mean characteristics
    non-stationary regime
    sieci kolejkowe
    sieć G
    pozytywny klient
    negatywny klient
    czas oczekiwania
    równania różniczkowe
    Opis:
    In the article a queueing network (QN) with positive customers and a random waiting time of negative customers has been investigated. Negative customers destroy positive customers on the expiration of a random time. Queueing systems (QS) operate under a heavy-traffic regime. The system of difference-differential equations (DDE) for state probabilities of such a network was obtained. The technique of solving this system and finding mean characteristics of the network, which is based on the use of multivariate generating functions was proposed.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2016, 15, 3; 111-122
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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