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Wyszukujesz frazę "timed Petri nets" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Timed Petri-Net Based Formulation and an Algorithm for the Optimal Scheduling of Batch Plants
Autorzy:
Gu, T.
Bahri, P. A.
Cai, G.
Powiązania:
https://bibliotekanauki.pl/articles/908094.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
informatyka
timed Petri nets
scheduling
batch plants
discrete event
algorithm
heuristic
Opis:
The effective scheduling of operations in batch plants has a great potential for high economic returns, in which the formulation and an optimal solution algorithm are the main issues of study. Petri nets have proven to be a promising technique for solving many difficult problems associated with the modelling, formal analysis, design and coordination control of discrete-event systems. One of the major advantages of using a Petri-net model is that the same model can be used for the analysis of behavioural properties and performance evaluation, as well as for the systematic construction of discrete-event simulators and controllers. This paper aims at presenting a Petri-net based approach to the scheduling of operations in batch plants. Firstly, the short term of the `scheduling of batch plants' is formulated by means of a timed Petri net which can accommodate various intermediate storage policies, such as unlimited intermediate storage (UIS), no intermediate storage (NIS), finite intermediate storage (FIS), and mixed intermediate storage (MIS). Secondly, a heuristic search algorithm for the optimal scheduling of batch plants is given, which is based on generating and checking the markings in the reachability tree of the Petri-net model. Finally, the novel formulation and algorithm are tested with several simulation case studies.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2003, 13, 4; 527-536
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A timed Petri net framework to find optimal IRIS schedules
Autorzy:
Werner, M.
Powiązania:
https://bibliotekanauki.pl/articles/970869.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
IRIS
increasing reward with increasing service
scheduling
timed Petri nets
critical path
real time
Opis:
IRIS (increasing reward with increasing service) realtime scheduling appears frequently in real-time control applications such as heuristic control. IRIS requires not only meeting deadlines, but also finding the schedule with the best result (highest reward). In this paper, a framework is presented that uses Timed Petri nets (TPN) to transform an IRIS problem into a dynamic programming (DP) problem, allowing the application of known TPN and DP techniques. In the presented approach, an IRIS problem with tasks having discrete-time optimal parts is transformed into a (possibly unbounded) TPN. Then, the critical path problem of the TPN state graph can be tackled with DP. This approach allows for the IRIS problem multiple constraints and negative rewards.
Źródło:
Control and Cybernetics; 2006, 35, 3; 703-719
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method of Serious Traffic Incidents Analysis with the Use of Stochastic Timed Petri Nets
Autorzy:
Skorupski, J.
Powiązania:
https://bibliotekanauki.pl/articles/115977.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Safety Barriers
Traffic Incident Analysis
Serious Traffic Incidents
Accident Investigation
Stochastic Timed Petri Nets
Air Traffic
Transport Safety
Traffic Incidents in Transport
Opis:
One of the primary sources of information and inspiration in the creation of new, more secure solutions in traffic organization are the occurrences with most serious consequences called accidents (air), serious accidents (rail) or catastrophes (road, sea). Accidents investigation is usually conducted in terms of searching for the reasons of these events and to make preventive recommendations aimed at elimination of these causes. In this paper, it is proposed to draw more attention to the events of somewhat less severity of the consequences - serious incidents (air), traffic conflicts (road) and incidents (rail, maritime). A model of real serious traffic incident, created with the use of stochastic, timed Petri nets is presented. Simulation experiments were carried out, which allowed for determination of the probability of transformation of the incident into the accident. The proposed method of analyzing serious traffic incidents also allows to determine the effectiveness of the barriers that have prevented an accident in a real occurrence.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 599-606
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and control of flexible manufacturing systems by means of interpreted Petri nets
Autorzy:
Čapkovič, František
Powiązania:
https://bibliotekanauki.pl/articles/950929.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
control
discrete event systems
flexible manufacturing systems
interpreted Petri nets
modelling
performance evaluation
place/transition Petri nets
timed Petri nets
kontrola
dyskretne systemy zdarzeń
elastyczne systemy produkcyjne
interpretowane sieci Petriego
modelowanie
ocena wydajności
miejsce/przejście sieci Petriego
czasowe sieci Petriego
Opis:
Because flexible manufacturing systems (FMS) are discrete event systems (DES), their modelling and control by means of Petri nets (PN) is widely used. While PN transitions are observable and controllable and PN places are measurable, place/transition PN (P/T PN) are suffcient for this aim. However, when some PN transitions are unobservable and/or uncontrollable and some places are non-measurable/unobservable, P/T PN are insufficient for modelling and especially for control. In such a case interpreted Petri nets (IPN) seem to be an appropriate replacement for P/T PN. In this paper a possibility of usage of IPN for FMS modelling and control is pointed out. Illustrative examples as well as the case study on a robotized assembly cell are introduced. By means of using timed PN (TPN) also the performance evaluation of the IPN model of controlled plant is accomplished whereby the simulation in Matlab.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2018, 12, 4; 3-10
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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