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Tytuł:
Network queueing systems
Autorzy:
Stachowski, Edward
Powiązania:
https://bibliotekanauki.pl/articles/748709.pdf
Data publikacji:
1982
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Queueing theory
Opis:
System sieciowy jest to system złożony z kilku jednocześnie działających stacji obsługi. Oprócz normalnych założeń przyjmujemy, że jednostka po zakończeniu obsługi w jednej stacji móże z pewnym prawdopodobieństwem przejść do innej stacji lub opuścić system; jednostka jak gdyby odbywa losowy spacer po stacjach. W niniejszej pracy przedstawione zostały systemy sieciowe z wejściem poissonowskim, o parametrze zależnym od aktualnego stanu systemu. Zdefiniowano proces opisujący pracę systemu, podano twierdzenie ergodyczne (konstrukcja procesu i idea twierdzenia oparte zostały na pracy I. Kowalenki (1964), dotyczącej procesów przedziałami liniowych) oraz wyprowadzono wzory na rozkłady stanu równowagi dla pewnej szerokiej klasy systemów.
From the introduction: "We represent network systems with a Poisson arrival stream whose parameter depends on the actual state of the system. We define a process which describes the operation of a system and present an ergodic theorem (the construction of the process and the concept of the theorem are based on a paper by I. N. Kovalenko [Izv. Akad. Nauk SSSR Tekhn. Kibernet. 1964, no. 6, 3–9; ibid. 1965, no. 1, 14–20; ibid. 1965, no. 3, 3–11; MR0204195] concerning piecewise-linear processes). We give examples of distribution of an equilibrium state for a broad class of systems.'' MR0707817
Źródło:
Mathematica Applicanda; 1982, 10, 20
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Queueing systems with priorities.
Autorzy:
Czerwińska, D.
Powiązania:
https://bibliotekanauki.pl/articles/747583.pdf
Data publikacji:
1976
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
60K25
Opis:
Artykuł nie zawiera streszczenia
This is a survey paper on priority queues. The bibliography contains 50 references, mostly up to the late 60's.
Źródło:
Mathematica Applicanda; 1976, 4, 7
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On cyclic queueing systems
Autorzy:
Huk, Joanna
Łukaszewicz, Józef
Powiązania:
https://bibliotekanauki.pl/articles/748308.pdf
Data publikacji:
1973
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
queue theory, transportation system
teoria kolejek, system transportowy, kolejki cykliczne
Opis:
W niniejszej pracy będziemy się zajmowali matematycznym modelem transportu w kopalni zwiru. W kopalni pracuje jedna koparka i N wywrotek . Koparka ta ładuje wydobywany żwir na wywrotki, które rozwożą urobek do jednego lub wiecej odbiorców (betoniarnie, budowy, itp.).  Czas załadunku jednej wywrotki jest zmienną losową, podobnie jak czas jazdy wywrotki i (liczony od chwili zakończenia ładowania do chwili powrotu pustej wywrotki). W warunkach losowych czasów załadunku i jazdy wywrotek obserwuje się niekiedy przestoje koparki, gdy w punkcie załadowczym brak jest pustych wywrotek do ładowania, a kiedy indziej kolejki wywrotek czekających na załadunek. Jedno i drugie zjawisko jest niekorzystne z punktu widzenia efektywności gospodarczej przedsiębiorstwa. Straty wynikające z tego powodu można wyeliminować całkowicie tylko w przypadku stałego czasu załadunku i stałego czasu jazdy, będącego całkowitą wielokrotnością czasu załadunku. W przypadku losowych czasów jazdy i załadunku, dla wyboru optymalnych warunków eksploatacji systemu chciałoby się  znaleźć oczekiwane wartości strat wynikających z przestojów koparki i wywrotek. Wartości oczekiwane takich strat łatwo będzie obliczyć, gdy praktyk poda cenę jednej godziny przestoju koparki i wywrotek a mateamtyk obliczy rozkład prawdopodobieństwa stanów procesu stochastycznego opisującego systuacje w systemie. Z takim zagadnieniem zwrócił się przed kilkoma laty do matematyków wrocławskich doc. Jerzy Wolszczan z Instytutu Ekonomiki Transportu Politechniki Szczecińskiej. Zagadnienie to jest zadaniem z teorii obsługi masowej, zwanej również teoria kolejek (patrz np. [4] lub [5]), która zajmuje się właśnie matematycznymi modelowami systemów, w których losowo zgłaszające sie jednostki potrzebują obsługi o losowym czasie. W kopalni żwiru zgłaszającymi się jednostaki są powracające puste wywrotki, a obsługa polega na ich załadunku. Ponieważ do czynienia mamy tylko z ustaloną liczbą jednostek, które po zakończeniu obsługi po pewnym czasie znowu zgłaszają sie do obsługi, system taki nazywamy zamkniętym lub cyklicznym systemem obsługi masowej. Częściowe rozwiązania zagadnienia Wolszczana przedstawione są w pracach I. Kopocińskiej ([1] i [2]). Obecna praca uzupełnia dotychczasowe wyniki analityczne doświadczeniami uzyskanymi z zastosowaniem metody symulacji systemu na elektronicznej maszynie cyfrowej.
The aim of the paper is to present a mathematical model of the transportation system based on the queueing theory.
Źródło:
Mathematica Applicanda; 1973, 1, 1
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Firefly algorithm in optimization of queueing systems
Autorzy:
Kwiecień, J.
Filipowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/201299.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
queueing systems
firefly algorithm
Opis:
Queueing theory provides methods for analysis of complex service systems in computer systems, communications, transportation networks and manufacturing. It incorporates Markovian systems with exponential service times and a Poisson arrival process. Two queueing systems with losses are also briefly characterized. The article describes firefly algorithm, which is successfully used for optimization of these queueing systems. The results of experiments performed for selected queueing systems have been also presented.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 2; 363-368
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Processor sharing queueing systems with non-homogeneous customers
Autorzy:
Tikhonenko, O.
Powiązania:
https://bibliotekanauki.pl/articles/121919.pdf
Data publikacji:
2010
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
egalitarian processor sharing
EPS
queueing models
egalitarne współdzielenie procesora
modele kolejkowe
Opis:
We investigate processor sharing queueing systems with non-homogeneous customers having some random space requirements. Such systems have been used to model and solve various practical problems occurring in the design of computer or communicating systems. The above non-homogenity means that each customer (independently of others) has some random space requirement and his length (or amount of work for his service) generally depends on the space requirement. In real systems, a total sum of space requirements of customers presenting in the system is limited by some constant value (memory capacity) V > 0. We estimate loss characteristcs for such a system using queueing models with unlimited memory space.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2010, 15; 149-162
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
M/M/n/m queueing systems with non-identical servers
Autorzy:
Ziółkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/121808.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
queueing theory
queueing systems
teoria kolejkowania
system kolejkowania
Opis:
M/M/n/m queueing systems with identical servers are well known in queueing theory and its applications. The analysis of these systems is very simple thanks to the fact that the number of customers ɳ(t) in the system at arbitrary time instant t forms a Markov chain. The main purpose of this paper is to analyse the M/M/n/m system under assumption that its servers are different, i.e. they have different parameters of service time.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2011, 16; 163-168
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Queueing systems with feedback
Systemy obsługi masowej ze sprzężeniem zwrotnym
Autorzy:
Kopocińska, I.
Kopociński, B.
Powiązania:
https://bibliotekanauki.pl/articles/742675.pdf
Data publikacji:
1971
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Applicationes Mathematicae; 1971, 12, 4; 373-384
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculating steady-state probabilities of queueing systems using hyperexponential approximation
Autorzy:
Zhernovyi, Yuriy
Kopytko, Bohdan
Powiązania:
https://bibliotekanauki.pl/articles/122829.pdf
Data publikacji:
2019
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
non-Markovian queueing system
hyperexponential approximation
complex and paradoxical parameters of distribution
system kolejkowy
aproksymacja
rozkład hiperesponencjalny
Opis:
This article proposes an analysis of the results of the application of hyperexponential approximations with parameters of the paradoxical and complex type for calculating the steady-state probabilities of the G/G/n/m queueing systems with the number of channels n = 1, 2 and 3. The steady-state probabilities are solutions of a system of linear algebraic equations obtained by the method of fictitious phases. Approximation of arbitrary distributions is carried out using the method of moments. We verified the obtained numerical results using potential method and simulation models, constructed by means of GPSS World.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 2; 111-122
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the law of the iterated logarithm in hybrid multiphase queueing systems
Autorzy:
Minkevičius, Saulius
Powiązania:
https://bibliotekanauki.pl/articles/1181931.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
operations research
model
computer network
queueing network
performance evaluationi
iterated logarithm
Opis:
The model of a hybrid multiphase queueing system (HMQS) has been developed to measure the performance of complex computer networks working under conditions of heavy traffic. Two probability limit theorems (laws of the iterated logarithm, LIL) are presented for a queue length of jobs in HMQS.
Źródło:
Operations Research and Decisions; 2020, 30, 4; 57-64
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recurrence relations for two-channel closed queueing systems with Erlangian service times
Autorzy:
Kopytko, B.
Zhernovyi, K.
Powiązania:
https://bibliotekanauki.pl/articles/122421.pdf
Data publikacji:
2018
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
two-channel closed queueing system
Erlangian service times
fictitious phase method
recurrence relations
system kolejkowania dwukanałowy
czas obsługi Erlanga
rozkład Erlanga
Opis:
This paper proposes a method for determining the steady-state characteristics of two-channel closed queueing systems with an exponential distribution of the time generation of service requests and the Erlang distributions of the service times. Recurrence relations for computing the steady-state distribution of the number of customers in the system are deduced. The obtained algorithms are tested on examples using simulation models in the GPSS World environment.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 1; 37-48
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steady-state characteristics of three-channel queueing systems with Erlangian service times
Autorzy:
Kopytko, B.
Zhernovyi, K.
Powiązania:
https://bibliotekanauki.pl/articles/122266.pdf
Data publikacji:
2016
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
three-channel queueing system
Poisson input
Erlangian service times
random dropping of customers
fictitious phase method
recurrence relations
trójkanałowy system kolejkowania
metoda fazy fikcyjnej
równanie rekurencyjne
Opis:
We propose a method of study the M/E2/3/∞ queueing systems: standard system and systems with the threshold and hysteretic strategies of the random dropping of customers in order to control the input flow. Recurrence relations to compute the stationary distribution of the number of customers and the steady-state characteristics are obtained. The developed algorithms are tested on examples using simulation models constructed with the assistance of the GPSS World tools.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2016, 15, 3; 75-87
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Queueing systems with random volume customers and a sectorized unlimited memory buffer
Autorzy:
Tikhonenko, Oleg
Ziółkowski, Marcin
Kempa, Wojciech M.
Powiązania:
https://bibliotekanauki.pl/articles/2055163.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
queueing system
random volume customers
sectorized memory buffer
total volume vector
Laplace transform
Laplace–Stieltjes transform
multivariate L’Hospital rule
system kolejkowania
wektor objętości
transformata Laplace'a
transformata Laplace'a-Stieltjesa
Opis:
In the present paper, we concentrate on basic concepts connected with the theory of queueing systems with random volume customers and a sectorized unlimited memory buffer. In such systems, the arriving customers are additionally characterized by a non-negative random volume vector. The vector’s indications can be understood as the sizes of portions of information of a different type that are located in the sectors of memory space of the system during customers’ sojourn in it. This information does not change while a customer is present in the system. After service termination, information immediately leaves the buffer, releasing its resources. In analyzed models, the service time of a customer is assumed to be dependent on his volume vector characteristics, which has influence on the total volume vector distribution. We investigate three types of such queueing systems: the Erlang queueing system, the single-server queueing system with unlimited queue and the egalitarian processor sharing system. For these models, we obtain a joint distribution function of the total volume vector in terms of Laplace (or Laplace-Stieltjes) transforms and formulae for steady-state initial mixed moments of the analyzed random vector, in the case when the memory buffer is composed of two sectors. We also calculate these characteristics for some practical case in which the service time of a customer is proportional to the customer’s length (understood as the sum of the volume vector’s indications). Moreover, we present some numerical computations illustrating theoretical results.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2021, 31, 3; 471--486
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculating steady-state probabilities of single-channel closed queueing systems using hyperexponential approximation
Autorzy:
Zhernovyi, Yuriy
Kopytko, Bohdan
Powiązania:
https://bibliotekanauki.pl/articles/1839796.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
single-channel closed queueing system
arbitrary distributions
hyperexponential approximation
system kolejkowania
rozkład prawdopodobieństwa
aproksymacja wykładnicza
Opis:
In this paper we propose a method for calculating steady-state probability distributions of the single-channel closed queueing systems with arbitrary distributions of customer generation times and service times. The approach based on the use of fictitious phases and hyperexponential approximations with parameters of the paradoxical and complex type by the method of moments. We defined conditions for the variation coefficients of the gamma distributions and Weibull distributions, for which the best accuracy of calculating the steady-state probabilities is achieved in comparison with the results of simulation modeling.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 113-120
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculating steady-state probabilities of single-channel closed queueing systems using hyperexponential approximation
Autorzy:
Zhernovyi, Yuriy
Kopytko, Bohdan
Powiązania:
https://bibliotekanauki.pl/articles/122348.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
single-channel closed queueing system
arbitrary distributions
hyperexponential approximation
system kolejkowania
rozkład prawdopodobieństwa
aproksymacja wykładnicza
Opis:
In this paper we propose a method for calculating steady-state probability distributions of the single-channel closed queueing systems with arbitrary distributions of customer generation times and service times. The approach based on the use of fictitious phases and hyperexponential approximations with parameters of the paradoxical and complex type by the method of moments. We defined conditions for the variation coefficients of the gamma distributions and Weibull distributions, for which the best accuracy of calculating the steady-state probabilities is achieved in comparison with the results of simulation modeling.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 1; 113-120
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
M/M/n/(m,V) queueing systems with a rejection mechanism based on AQM
Autorzy:
Ziółkowski, M.
Małek, J.
Powiązania:
https://bibliotekanauki.pl/articles/122605.pdf
Data publikacji:
2013
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
Markovian process
queueing systems with non-homogeneous customers
active queue management introduction
Opis:
M/M/n/(m,V) queueing systems with service time independent of customer volume are well known models used in computer science. In real computer systems (computer networks etc.) we often deal with the overload problem. In computer networks we solve the problem using AQM techniques, which are connected with introducing some accepting function that lets us reject in random way some part of the arriving customers. It causes reduction of each customer's mean waiting time and let us avoid jams in consequence. Unfortunately, in this way the loss probability increases. In this paper we investigate the analogous model based on some generalization of M/M/n/(m,V) queueing system. We obtain formulas for a stationary number of customers distribution function and loss probability and we do some computations in special cases.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 1; 121-130
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of networks with positive and negative messages, many-lines queueing systems and incomes
Autorzy:
Naumenko, V.
Matalytski, M.
Powiązania:
https://bibliotekanauki.pl/articles/122391.pdf
Data publikacji:
2015
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
G-network
negative messages
many-lines systems
expected incomes
information systems and networks
Opis:
The analysis of an open Markov Queueing Network with positive and negative messages, many-lines queueing systems and incomes has been carried out. External arrivals to the network, service times of rates and probabilities of messages transition between queueing systems (QS) depend on time. A method for finding the expected incomes of the network systems, the expressions for the average number of messages at the systems has been proposed.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 1; 79-90
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of G-network with bypasses of queueing systems by positive customers at a non-stationary regime
Autorzy:
Naumenko, Victor
Kopats, Dmitry
Matalytski, Mikhail
Pankov, Andrey
Powiązania:
https://bibliotekanauki.pl/articles/1839756.pdf
Data publikacji:
2020
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
queuing network
non-stationary regime
negative customers
bypass
sieć kolejkowa
negatywny klient
pozytywny klient
Opis:
An open queuing network (QN) with single-line queuing systems (QS) is considered. QS are characterized by the presence of bypasses and the possibility of coming of negative customers. The network receives two independent elementary streams. The first stream is formed from the ordinary (positive) customers, while the second is composed of negative customers. Arriving of each negative customer to the system destroys exactly one positive customer in the queue, if those are contained. Negative customers do not require maintenance as the service of positive customers in the network systems is carried out in accordance with the FIFO discipline. Positive customers with a probability depending on the state of the node when they are sent to it are added to the queue, and with an additional probability, they immediately bypass it and behave in the future as served. The service in the systems is exponential, the routing of positive customers in the network is Markov, taking into account the possibility of turning the customer into a negative one after sending it to another system.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 3; 85-97
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Queueing systems with mixed input stream and feedback
Systemy obsługi masowej z mieszanką strumieni zgłoszeń i sprzężeniem zwrotnym
Autorzy:
Kopocińska, I.
Kopociński, B.
Powiązania:
https://bibliotekanauki.pl/articles/741336.pdf
Data publikacji:
1974
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Applicationes Mathematicae; 1974-1975, 14, 2; 177-183
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation of unreliable system with infinite number of servers
Autorzy:
Tikhonenko, O.
Ziółkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/201519.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
queueing systems with non-homogeneous customers
unreliable queueing systems
total volume
loss probability
Laplace–Stieltjes transform
Opis:
In the paper, we investigate queueing system M/G/∞ with non-homogeneous customers. By non-homogeneity we mean that each customer is characterized by some arbitrarily distributed random volume. The arriving customers appear according to a stationary Poisson process. Service time of a customer is proportional to his its volume. The system is unreliable, which means that all its servers can break simultaneously and then the repair period goes on for random time having an arbitrary distribution. During this period, customers present in the system and arriving to it are not served. Their service continues immediately after repair period termination. Time intervals of the system in good repair mode have an exponential distribution. For such system, we determine steady-state sojourn time and total volume of customers present in it distributions. We also estimate the loss probability for the similar system with limited total volume. An analysis of some special cases and some numerical examples are attached as well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 2; 289-297
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
M/G→ /n/0 Erlang queueing system with heterogeneous servers and non-homogeneous customers
Autorzy:
Ziółkowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/199840.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
multi-server queueing systems
queueing systems with non-homogeneous customers
queueing systems with heterogeneous servers
total volume distribution
Laplace–Stieltjes transform
system kolejkowania
transformata Laplace'a-Stieltjesa
dystrybucja
Opis:
In the present paper, we investigate a multi-server queueing system with heterogeneous servers, unlimited memory space, and non-homogeneous customers. The arriving customers appear according to a stationary Poisson process. Service time distribution functions may be different for every server. Customers are additionally characterized by some random volume. On every server, the service time of the customer depends on their volume. The number of customers distribution function is obtained in the classical model of the system. In the model with non-homogeneous customers, the stationary total volume distribution function is determined in the term of Laplace–Stieltjes transform. The stationary first and second moments of a total customers volume are calculated. An analysis of some special cases of the model and some numerical examples are also included.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 59-66
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Queueing systems with a reserve service channel
Systemy kolejkowe z rezerwowym kanałem obsługi
Системы массового обслуживания с резервным каналом
Autorzy:
Bartoszewicz, J.
Rolski, T.
Powiązania:
https://bibliotekanauki.pl/articles/741564.pdf
Data publikacji:
1970
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Applicationes Mathematicae; 1969-1970, 11, 4; 439-449
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculating steady-state probabilities of single-channel queueing systems with changes of service times depending on the queue length
Autorzy:
Zhernovyi, Yuriy
Kopytko, Bohdan
Powiązania:
https://bibliotekanauki.pl/articles/122726.pdf
Data publikacji:
2019
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
single-channel queueing system
service times changes depending of the queue length
hyperexponential approximation
rozkład hiperesponencjalny
czas obsługi
system kolejkowania jednokanałowy
długość kolejki
Opis:
In this paper, we propose a method for calculating steady-state probabilities of the G/G/1/m and M/G/1/m queueing systems with service times changes depending of the number of customers in the system. The method is based on the use of fictitious phases and hyperexponential approximations with parameters of the paradoxical and complex type. A change in the service mode can only occur at the moment the service is started. We verified the obtained numerical results using the potential method and simulation models, constructed by means of GPSS World.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 3; 107-117
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recurrence relations for two-channel queueing systems with Erlangian service times and hysteretic strategy of random dropping of customers
Autorzy:
Zhernovyi, Y.
Kopytko, B.
Powiązania:
https://bibliotekanauki.pl/articles/122986.pdf
Data publikacji:
2018
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
two-channel queueing system
Erlangian service times
random dropping of customers
fictitious phase method
hysteretic strategy
recurrence relations
steady-state characteristics
czas obsługi Erlanga
strategia histeretyczna
system kolejkowania dwukanałowy
Opis:
This article proposes a method of study the M/Es/2/m and M/Es/2/∞ queueing systems with a hysteretic strategy of random dropping of customers. Recurrence relations are obtained to compute the stationary distribution of the number of customers and steadystate characteristics. The constructed algorithms were tested on examples with the use of simulation models constructed with the help of GPSS World.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 2; 93-103
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heterogeneous queueing systems $M/M_i/2$ with balking
Niejednorodne systemy obsługi masowej typu $M/M_i/2$ z rezygnacją
Autorzy:
Huk, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/742552.pdf
Data publikacji:
1976
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Applicationes Mathematicae; 1976-1977, 15, 2; 149-154
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Graphical application for the construction of a simulator of urban vehicular traffic flows
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1955303.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska
Tematy:
discrete event simulators
vehicular flows
complex queueing systems
Opis:
One of the most fundamental problems encountered during the construction of a simulator of urban vehicular traffic flows concerns the method of gathering the data describing the real system. In this paper, we present a graphical application developed for AutoCAD. This application allows to process the images of a vehicular traffic system in AutoCAD. During the graphical processing performed by means of our application, a file describing the system is generated. This file is subsequently read by a procedure which generates the simulator of the system. The images of the traffic system can be acquired by means of several applications available on the Internet, such as Google Maps, Google Earth, Bing, etc. Performing image processing in the context of AutoCAD allows to consistently handle distance measurements in the system, and, in general, to address the problems related to the scale ratios of an image.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2010, 14, 4; 405-430
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of firefly and cockroach algorithms in selected discrete and combinatorial problems
Autorzy:
Kwiecień, J.
Filipowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/200148.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
queueing systems
flow shop scheduling
firefly algorithm
cockroach algorithm
systemy kolejkowe
planowanie przepływów
algorytm świetlika
algorytm karaluch
Opis:
In recent years, newer algorithms inspired by nature have been created and used to solve various problems. Therefore, in the paper we present the application of firefly and cockroach algorithms to optimize two queueing systems and permutation flow shop problems with the objective of minimizing the makespan. The article briefly describes these algorithms to solve selected problems and their results. Because these algorithms were originally developed for continuous optimization problems, we introduce a new formula to transform the position of ith individual to solve the discrete problems.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 797-804
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GI/M/1 queueing systems with service rates depending on the length of queue
System GI/M/1 ze sprzężeniem intensywności obsług z długością kolejki
Система GI/M/1 с обратной связью интенсивности обслуживания с длиной очереди
Autorzy:
Kopocińska, I.
Powiązania:
https://bibliotekanauki.pl/articles/741178.pdf
Data publikacji:
1970
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Applicationes Mathematicae; 1969-1970, 11, 3; 265-279
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Asymptotic analysis of a closed G-network of unreliable nodes
Autorzy:
Rusilko, Tatiana
Powiązania:
https://bibliotekanauki.pl/articles/2175521.pdf
Data publikacji:
2022
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
G-network
unreliable queueing systems
positive customer
negative customer
birth-death process
asymptotic analysis
queueing network
sieć G
proces narodzin i śmierci
analiza asymptotyczna
sieci kolejkowe
Opis:
A closed exponential queueing G-network of unreliable multi-server nodes was studied under the asymptotic assumption of a large number of customers. The process of changing the number of functional servers in network nodes was considered as the birth-death process. The process of changing the number of customers at the nodes was considered as a continuous-state Markov process. It was proved that its probability density function satisfies the Fokker-Planck-Kolmogorov equation. The system of differential equations for the first-order and second-order moments of this process was derived. This allows us to predict the expectation, the variance and the pairwise correlation of the number of customers in the G-network nodes both in the transient and steady state.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2022, 21, 2; 91--102
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On global maxima in multiphase queues
Autorzy:
Minkevicius, S.
Steisunas, S.
Powiązania:
https://bibliotekanauki.pl/articles/970104.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
system kolejek
kolejka wielofazowa
queueing systems
multiphase queue
heavy traffic
global maxima
total waiting time of a customer
waiting time of a customer
law of the iterated logarithm
Opis:
The target of this research in the queueing theory is to prove the law of the iterated logarithm (LIL) under the conditions of heavy traffic in multiphase queueing systems. In this paper, the LIL for global maxima is proved in the phases of a queueing system studied for an important probability characteristic of the system (total waiting time of a customer and waiting time of a customer).
Źródło:
Control and Cybernetics; 2005, 34, 2; 575-588
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi–server loss queueing system with random volume customers, non–identical servers and a limited sectorized memory buffer
Autorzy:
Ziółkowski, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/27311432.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
multi–server queueing system with heterogeneous servers
queueing systems with random volume customers
sectorized memory buffer
loss probability
Stieltjes convolution
wieloserwerowy system kolejkowy z serwerami heterogenicznymi
prawdopodobieństwo straty
splot Stieltjesa
bufor pamięci sektorowany
system kolejkowy z losowymi klientami
Opis:
In the present paper, the model of multi–server queueing system with random volume customers, non–identical (heterogeneous) servers and a sectorized memory buffer has been investigated. In such system, the arriving customers deliver some portions of information of a different type which means that they are additionally characterized by some random volume vector. This multidimensional information is stored in some specific sectors of a limited memory buffer until customer ends his service. In analyzed model, the arrival flow is assumed to be Poissonian, customers’ service times are independent of their volume vectors and exponentially distributed but the service parameters may be different for every server. Obtained results include general formulae for the steady–state number of customers distribution and loss probability. Special cases analysis and some numerical computations are attached as well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 5; art. no. e146764
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single–server queueing system with limited queue, random volume customers and unlimited sectorized memory buffer
Autorzy:
Ziółkowski, Marcin
Tikhonenko, Oleg
Powiązania:
https://bibliotekanauki.pl/articles/2173725.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
single-server queueing system
queueing systems with random volume customers
sectorized memory buffer
total volume vector
Laplace-Stieltjes transform
system kolejkowy z jednym serwerem
system kolejkowy z losowymi klientami
bufor pamięci sektorowany
wektor objętości całkowity
transformata Laplace'a-Stieltjesa
Opis:
In the present paper, we analyze the model of a single–server queueing system with limited number of waiting positions, random volume customers and unlimited sectorized memory buffer. In such a system, the arriving customer is additionally characterized by a non– negative random volume vector whose indications usually represent the portions of unchanged information of a different type that are located in sectors of unlimited memory space dedicated for them during customer presence in the system. When the server ends the service of a customer, information immediately leaves the buffer, releasing resources of the proper sectors. We assume that in the investigated model, the service time of a customer is dependent on his volume vector characteristics. For such defined model, we obtain a general formula for steady–state joint distribution function of the total volume vector in terms of Laplace-Stieltjes transforms. We also present practical results for some special cases of the model together with formulae for steady–state initial moments of the analyzed random vector, in cases where the memory buffer is composed of at most two sectors. Some numerical computations illustrating obtained theoretical results are attached as well.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 6; art. no. e143647
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formulas for average transition times between states of the Markov birth-death process
Autorzy:
Zhernovyi, Yuriy
Kopytko, Bohdan
Powiązania:
https://bibliotekanauki.pl/articles/2175497.pdf
Data publikacji:
2021
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
birth-death process
Markov models
mean transition time
mean time spent in the group of states
queueing systems
reliability model
proces narodzin i śmierci
modele Markova
średni czas przejścia
średni czas spędzony w grupie stanów
systemy kolejkowe
model niezawodności
Opis:
In this paper, we consider Markov birth-death processes with constant intensities of transitions between neighboring states that have an ergodic property. Using the exponential distributions properties, we obtain formulas for the mean time of transition from the state i to the state j and transitions back, from the state j to the state i. We found expressions for the mean time spent outside the given state i, the mean time spent in the group of states (0,...,i-1) to the left from state i, and the mean time spent in the group of states (i+1,i+2,...) to the right. We derive the formulas for some special cases of the Markov birth-death processes, namely, for the Erlang loss system, the queueing systems with finite and with infinite waiting room and the reliability model for a recoverable system.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 4; 99--110
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expected volumes of requests in systems of the queueing network with a limited number of waiting places
Autorzy:
Zając, P.
Matalytski, M.
Powiązania:
https://bibliotekanauki.pl/articles/121834.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
sieci HM
sieci kolejkowe
system kolejkowy
bezprzewodowy punkt dostępu
HM-networks
queueing network
single-line queueing system
queueing system
queuing time
limited queue
demands total volume
wireless access point
volume of requests
Opis:
We present a method of finding the expected volume of requests in HM-network with homogeneous requests and bypass of the queueing systems of requests. The case was considered when the volume changes associated with the transitions between the states of the network are deterministic functions, depending on the state of the network and time, and the systems are single line. It is assumed that the probability of the states of the network systems, the parameters of the entrance flow of the requests and the service depend on the time.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2017, 22; 141-160
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonstationary analysis of the queueing network with bypass of systems of multi-type and absolute priority messages
Autorzy:
Matalytski, M.
Naumenko, V.
Powiązania:
https://bibliotekanauki.pl/articles/122976.pdf
Data publikacji:
2013
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
multi-type messages bypass of systems
absolute priority
conditional probabilities of transitions
system of difference-differential equations
probability states
generating function
Opis:
This paper contains an investigation of an open exponential network with bypass of systems of multi-type messages with absolute priority in transient behavior. Messages with priority received by the node with the probability depending on the state system and the type of incoming messages are for service, forcing messages that are serviced or instant changes in the following system, and can leave the network. Network settings: the intensity of the incoming flow and the intensity of service of different types of messages in single-line systems and the conditional probabilities of transitions of messages between the systems are dependent on the time. We obtained a system difference-differential equations for the state probabilities of the network. To find the state probabilities of the network in the transitional behavior applied a methodology based on the use of the apparatus of multidimensional generating functions.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 1; 93-105
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance Modeling of Database Systems: a Survey
Autorzy:
Krajewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/309263.pdf
Data publikacji:
2018
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
database systems
NoSQL data stores
performance evaluation
queueing networks
queueing Petri nets
Opis:
This paper presents a systematic survey of the existing database system performance evaluation models based on the queueing theory. The continuous evolution of the methodologies developed is classified according to the mathematical modeling language used. This survey covers formal models – from queueing systems and queueing networks to queueing Petri nets. Some fundamentals of the queueing system theory are presented and queueing system models are classified according to service time distribution. The paper introduces queueing networks and considers several classification criteria applicable to such models. This survey distinguishes methodologies, which evaluate database performance at the integrated system level. Finally, queueing Petri nets are introduced, which combine modeling power of queueing networks and Petri nets. Two performance models within this formalism are investigated. We find that an insufficient amount of research effort is directed into the area of NoSQL data stores. Vast majority of models developed focus on traditional relational models. These models should be adapted to evaluate performance of non-relational data stores.
Źródło:
Journal of Telecommunications and Information Technology; 2018, 4; 37-45
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonstationary analysis of a queueing network with positive and negative messages
Autorzy:
Matalytski, M.
Naumenko, V.
Powiązania:
https://bibliotekanauki.pl/articles/122613.pdf
Data publikacji:
2013
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
information systems
telecommunications systems
information networks
telecommunications networks
virus
open G-network with negative messages
transient behavior
system of difference-differential equations
probability states
generating function
Opis:
This paper contains an investigation of an open queueing network with positive and negative messages that can be used to model the behavior of viruses in information and telecommunication systems and networks. The purpose of research is investigation of such a network at the transient behavior. We consider the case when the intensity of the incoming flow of positive and negative messages and service intensity of messages do not depend on time. It is assumed that all queueing systems of network are one-line. We obtained a system difference-differential equations for the state probabilities of the network. To find the state probabilities of the network in the transitional behavior applied a methodology based on the use of the apparatus of multidimensional generating functions. We obtained an expression for generating function. An example is calculated.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 2; 61-71
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vehicular flow simulators based on complex queuing systems
Autorzy:
Pasini, L.
Feliziani, S.
Powiązania:
https://bibliotekanauki.pl/articles/1955296.pdf
Data publikacji:
2013
Wydawca:
Politechnika Gdańska
Tematy:
traffic systems
queueing network
modeling and simulation
Opis:
The crux of this paper is to demonstrate how it is possible to model systems of vehicular trafic by means of complex queuing network models. The objects comprising the library that we define in this work all follow the approach whereby they are composed of one or more queuing networks of service systems that are traversed by customers (vehicles).
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2013, 17, 3-4; 155--180
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dimensioning aspects of SMS systems in mobile networks
Autorzy:
Klink, J.
Uhl, T.
Powiązania:
https://bibliotekanauki.pl/articles/134973.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
SMS
QoS
Quality of Experience (QoE)
text messaging
queueing system
dimensioning
Opis:
This paper focuses on factors affecting the dimensioning of Short Message Service (SMS) systems in mobile communications networks. Problems associated with Quality of Service (QoS) in modern communications networks in general are described, along with the main parameters that define QoS in SMS systems. The functionality of the SMS in terms of European Telecommunications Standards Institute (ETSI) standards is then explained. The creation of a queuing model is described for an SMS system which is based on ETSI documentation and will be analysed in calculations. The parameter completion rate plays an important role in SMS. Practical aspects of the End-to-End (E2E) delivery time for SMS systems are also discussed. The approach suggested in this paper and the insights gained in the course of this work can be of valuable practical use in the planning and analysis of real SMS systems.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 110-118
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Probabilistic elements in analysis of performance of multiprocessor systems
Autorzy:
Taborek, K.
Hrynkiewicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/201505.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
arbitration circuit
multiprocessor system
performance analysis
queueing model
arbitraż
system wieloprocesorowy
analiza wydajności
model kolejkowy
Opis:
The paper presents important probabilistic elements that should be taken into consideration in the analysis of performance of classical multiprocessor systems. These elements represent the following quantities: modified arrival rate for processor requests and a few probabilities, which determine the frequency of certain events when a multiprocessor system is working. There are four peculiar events: service of another job, existence of the queue, a processor request while the given task is waiting into the queue and the return of another task into the queue while the given task is waiting in the queue. The first three events happen more often when a system consists of less number of processors, whereas the fourth event happens more often when more processors work in a system. Including (or not) the probabilities of these events to the analysis of performance of multiprocessor systems exerts its much influence on the precision of computations. All the mentioned quantities were described in detail. Formulas for these quantities were derived. Examples of applications of the formulas to the prediction of performance of various multiprocessor systems were presented.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 4; 765-771
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie teorii masowej obsługi do modelowania systemów transportowych
Autorzy:
Kisielewski, P.
Sobota, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/312316.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
system masowej obsługi
systemy transportowe
stacje paliw
myjnie samochodowe
sieci kolejkowe
queueing system
transport systems
filling station
car washes
Opis:
W artykule przedstawiono zastosowanie teorii masowej obsługi do analizy i modelowania wybranych systemów transportowych.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 6; 600-604
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of a vehicular traffic system based on queueing network models: comparative analysis of two models
Autorzy:
Pasini, Leonardo
Del Giudice, Nicola
Powiązania:
https://bibliotekanauki.pl/articles/1954603.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska
Tematy:
vehicular traffic systems
queuing networks
modeling
simulation
systemy ruchu kołowego
sieci kolejkowe
modelowanie
symulacja
Opis:
In the previous works we presented a study for modeling and simulation of vehicular traffic systems based on queuing networks. Specifically, in paper (Pasini and Bianchini, 2019), we studied the urban network located in North Siena, in the city of Siena (Italy), in its actual layout, after the Municipality had introduced some changes for vehicular flow management. This system is based on two roundabouts and a crossroad, as shown in Figure 1. In this work, we are going to conclude our previous study, comparing the actual vehicular flow and the flow derived from an alternative system, foreseen by the PRG of the Municipality of Siena which is composed of three roundabouts and which has not been implemented yet.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2020, 24, 3; 243-292
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
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