Over the last decade, opacity of discrete event systems (DES) has become a very fertile field of research. Driven bysafety and privacy concerns in network communications and online services, much theoretical work has been conductedin order to design opaque systems. A system is opaque if an external observer in unable to infer a ”secret” about thesystem behavior. This paper aims to r...

Over the last decade, opacity of discrete event systems (DES) has become a very fertile field of research. Driven by safety and privacy concerns in network communications and online services, much theoretical work has been conducted in order to design opaque systems. A system is opaque if an external observer in unable to infer a ”secret” about the system behavior. This paper aims to review the...

Simulation is the best tool used to predict the behavior of real world systems. For the analysis of complex systems, simulation is often used prior to the operation of the system as a mediator for a dynamic situation. This chapter presents the issue of complex systems simulation through Discrete Event Simulation (DES) and System Dynamics (SD) techniques. The Authors original approach stands in ...

The present paper approaches the development and application of a Discrete Event Simulation (DES) model with a Multiple Criteria Decision Analysis (MCDA) tool for the simulation and sizing of a closed-loop maritime transportation system. This system is responsible for the supply of raw materials, especially iron ore, to a steel plant, and its sizing involves the analysis of the transportation f...

The objective of the paper is to present the concept of using selected computational intelligence methods in conjunction with discrete event simulation (DES) models of chosen logistics processes. A review of the recent literature in the scope of applications of discrete event simulation methods indicates that researchers who use these methods more and more often employ techniques from the area ...

In this paper we present a hierarchical method that decomposes a system into two subsystems, and restricts the interaction of the subsystems by means of an interface. We present definitions for two types of interfaces (represented as discrete-event systems (DES)), and define a set of interface consistency properties that can be used to verify if a DES is nonblocking and controllable. Each claus...

In this paper a generic method for fault detection and isolation (FDI) in manufacturing systems considered as discrete event systems (DES) is presented. The method uses an identified model of the closed loop of plant and controller built on the basis of observed fault free system behavior. An identification algorithm known from literature is used to determine the fault detection model in form o...

ion of Continuous System to Discrete Event System Using Neural Network Sung Hoon Jung* and Tag Gon Kim, *School of Information and Computer Engineering, Hansung Univ., Seoul, Korea tDepartment of Electrical Engineering, KAIST, Taejon 305-701, Korea ABSTRACT A hybrid system consists of continuous systems and discrete event systems, which interact with each other. In such configuration, a continu...

In this paper, we investigate output accuracy for a Discrete Event Simulation (DES) model and Agent Based Simulation (ABS) model. The purpose of this investigation is to find out which of these simulation techniques is the best one for modelling human reactive behaviour in the retail sector. In order to study the output accuracy in both models , we have carried out a validation experiment in wh...