National Repository of Grey Literature 7 records found  Search took 0.00 seconds. 
High-Level Petri Nets Interpreter in Python
Grigorev, Danil ; Kočí, Radek (referee) ; Janoušek, Vladimír (advisor)
This work is targeting a goal of implementing a high level Petri net interpret in Python. The implementation is based on SNAKES library. The final product is capable of executing and visualising Petri nets, created by user. The simulator is based on distributed systems theory and is executed in real-time. The end user is able to experience a simple and human-friendly API, made for creation and execution of High-Level Petri Nets.
High-Quality Visualization of Petri Nets for Publishing Purposes
Bednář, Drahoslav ; Kočí, Radek (referee) ; Janoušek, Vladimír (advisor)
This work is trying to solve the problem of graphical visualization of Petri nets in text publications. The aim of the thesis is to create a tool that will simplify generating of Petri nets and at the same time provide a more aesthetic graphical output than existing tools do. A simplex algorithm was used for automatic network layout. The program has both graphical interface and text mode and can cooperate well with existing tools for working with Petri nets, which the text also mentions. The program is able to load a pnml file and produce a usable image in png, pdf, and svg formats.
Garbage Collector for PNtalk Objects
Mišák, Ján ; Janoušek, Vladimír (referee) ; Kočí, Radek (advisor)
This thesis deals with the designing of a garbage collector for the PNtalk virtual machine. It describes and rates the approaches and algorithms for an automatic memory management. Four algorithm families ale presented: mark-sweep, mark-compact, copying algorithms and reference counting. At first it describes sequential forms, that pauses running of the main program (mutator), then it describes parallel and concurent forms, that do not pauses the mutator. The thesis also presents generational model of garbage collecting. The following sections briefly introduces object orientated Petri nets. The result of this thesis is the design of the generational garbage collector for the PNtalk virtual machine.
Client-Server Application for DEVS-Based Modelling and Simulation
Brázdil, Martin ; Peringer, Petr (referee) ; Janoušek, Vladimír (advisor)
This bachelor’s thesis describes the analysis, design and implementation of an application for DEVS-based modelling and simulation. It is a client-server application, where the client is implemented as a seperate desktop Java application. Server is based on the Smalltalk language (more precisely, Squeak) and builds on existing application SmallDEVS. The reader is acquainted with the basics of discrete event systems specification (DEVS) and Petri nets used for modeling and simulation. The thesis is also dedicated to the design of user-friendly graphical interface on the client side, respectively editor.
Risks Analysis in Project Management
Paulenda, Ján ; Šuška, Boris (referee) ; Kreslíková, Jitka (advisor)
The main subject of this Master's thesis is risk management with emphasis on risk analysis stage. All important stages, definitions and techniques are introduced in the context of risk management. There are several risk analysis methods discussed in this thesis, especially the Markov analysis and the Petri net analysis. After the thorough analysis of the subject, the system to support the risk management was designed and implemented, while precisely Markov analysis was chosen.
Simulation Sever for DEVS
Šimara, Michal ; Kočí, Radek (referee) ; Janoušek, Vladimír (advisor)
The purpose of this master's thesis was to design and implement the simulation server for the DEVS that is using already existing SmallDEVS system. The work is aimed to description of the DEVS formalism, SmallDEVS and implemented simulation server. This server provides functions to create new DEVS models, edit already existing models and control simulation. In addition server saves information about state changes during the simulation process, so we can find out the state of the model at any simulation time. It allows to analyze this data and get more information about the simulation process, which was not possible until now. There is a complete description of the communication protocol between client and server in this document. If a new function is implemented in the SmallDEVS system, this protocol can be easily updated. A prototype of client was implemented during this project to test the implemented simulation server. The client implements this communication protocol and allows the user to work with the SmallDEVS system on the server.
Transformation BORM - Petri net with supervision
Moravec, J. ; Papík, Martin
For effective functioning of business processes need to processes be well documented and optimized. There are many ways to describe processes. Simple but effective approach appears to be the methodology BORM, which is implemented in the tool CraftCase. Unfortunately, this tool don’t offer such a comprehensive process simulation capabilities, which are often needed. Ways to eliminate this shortcoming is using Petri nets for process simulation. First, we need capture the process with BORM methodology and then we transform it to the Petri net. This post deals with transformation rules, restrictions of BORM and Petri nets and finally we show how to construct supervisor of Petri nets.

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