نتایج جستجو برای: petri
تعداد نتایج: 12879 فیلتر نتایج به سال:
in this thesis, a structured hierarchical methodology based on petri nets is used to introduce a task model for a soccer goalkeeper robot. in real or robot soccer, goalkeeper is an important element which has a key role and challenging features in the game. goalkeeper aims at defending goal from scoring goals by opponent team, actually to prevent the goal from the opponent player’s attacks. thi...
this paper describes an evaluation through a case study by measuring a rule-based approach, which proposed for ladder logic diagrams and petri nets. in the beginning, programmable logic controllers were widely designed by ladder logic diagrams. when complexity and functionality of manufacturing systems increases, developing their software is becoming more difficult. thus, petri nets as a high l...
Discrete event system, Supervisory control, Petri Net, Constraint This paper presents a method to manage the time in a manufacturing system for obtaining an optimized model. The system in this paper is modeled by the timed Petri net and the optimization is performed based on the structural properties of Petri nets. In a system there are some states which are called forbidden states an...
Petri net is one of the most popular methods in modeling and evaluation of concurrent and event-based systems. Different tools have been created to support modeling and simulation of different extensions of Petri net in different applications. Each tool supports some extensions and some features. In this work a Petri net based modeling and evaluation tool is presented that not only supports dif...
in this paper the real time operation of an automatic teller machine (atm) is analyzed using atimed petri net (tpn) model. in the modeling, the probability of arrivals, the speed andattentiveness of customers (clients) are taken to account. different parameters are based onthe statistical data. the model is simulated for 24 hours. the diagrams of number ofsucceeded customers, failed references ...
This paper describes an evaluation through a case study by measuring a rule-based approach, which proposed for ladder logic diagrams and Petri nets. In the beginning, programmable logic controllers were widely designed by ladder logic diagrams. When complexity and functionality of manufacturing systems increases, developing their software is becoming more difficult. Thus, Petri nets as a high l...
CRC cards are unconventional method for identifying and describing classes, behavior and its responsibilities and collaborators of class. Representation of three categories of class, responsibilities and collaborators can give proper image of scenario. These cards are effective method for analyzing scenarios. With all positive features of CRC cards, of weaknesses of these cards are failure to s...
due to the changes which may occur in their parameters, systems are usually demonstrated by some subsystems for different conditions. this paper employs modified petri nets (mpn) to model theses subsystems and makes it simple to analyze them. in this method, first, the continuous transfer function is converted to a discrete transfer function and then, by mpn, system is modeled and analyzed. all...
Today there are many techniques for web service compositions. Evaluation of quality parameters has great impact on evaluation of final product. BPEL is one of those techniques that several researches have been done on its evaluation. However, there are few researches on evaluation of QoS in eflow. This research tries to evaluate performance and reliability of eflow and BPEL through mapping them...
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