Global ETD Search
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Showing 1 to 14 of 14 for “"discrete event system"”.
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Discrete event system modeling using SysML and model transformation
… a unified framework for modeling and simulating discrete event logistics systems (DELS) by using a formal language, the System Modeling Language (SysML), for conceptual modeling and a corresponding methodology for translating the conceptual model into a simulation model. There are three parts in …
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An Extended Fuzzy Discrete Event System For Hiv/aids Treatment Regimen Selection
… dependent on the physician experts' opinion. A system which is capable of supporting the treatment decision will be desired. Recently, the HIV/AIDS treatment regimen selection system appeared in literature that utilized theory of fuzzy discrete event system (FDES) to capture the meaning of …
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A Generic Framework For Multi-Method Modeling and Simulation of Complex Systems Using Discrete Event, System Dynamics and Agent Based Approaches.
… about Modeling and Simulation (M&S) of Complex Systems (CS) need to be evaluated prior to implementation. Discrete Event (DE), System Dynamics (SD), and Agent Based (AB) are three different M&S approaches widely applied to enhance decision-making of complex systems. However, single type M&S …
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Opacity Of Discrete Event Systems: Analysis And Control
<p>The exchange of sensitive information in many systems over a network can be manipulated</p> <p>by unauthorized access. Opacity is a property to investigate security and</p> <p>privacy problems in such systems. Opacity characterizes whether a secret information</p> <p>of a system can be inferred …
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Modeling, design and scheduling of computer integrated manufacturing and demanufacturing systems
This doctoral dissertation work aims to provide a discrete-event system-based methodology for design, implementation, and operation of flexible and agile manufacturing and demanufacturing systems. After a review of the current academic and industrial activities in these fields, a Virtual Production …
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Efficient selection of a set of good enough designs with complexity preference
… solving the best design selection problem in the discrete-event system simulation. The selection of one or several best designs is a common problem people meet in real situations. The research originally focused on the one best design selection problem, the two-stage procedure. Later, there was …
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Simulation study of a semi-automated flexible production line
… is the use of computer based manufacturing system simulation. Simulation studies are beneficial because they remove the element of risk associated with experimentation. Potential process improvement strategies can be identified, evaluated, compared and chosen in a virtual environment before …
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Dynamic Coordination Architecture and Mobility Management for Next Generation Cooperative Cellular Networks
… the EHoLM handover procedure is to improve the system performance and user experience, reducing the number of handovers, handover oscillation and handover failure rate. To examine the performance of the proposed algorithms we use the discrete event system specifications (DEVS) for modeling and …
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A system framework for non-intrusive monitoring of HMI states for detecting human-in-the-loop error precursors
… The objective of this research is to design a system for detecting HITL error precursors to ascertain operator SA (as a function of operator activity index) in real-time via non-intrusive monitoring. The proposed system frameworks are ViDAQ and EYE-on-HMI. ViDAQ is a visual data acquisition …
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Intelligent Digital Twin for Optimizing Warehouse Operations: Embedded Optimization Components for Enhanced Order-Picking Efficiency
… more complex for human management due to varying system conditions, a large number of variables and constraints, and huge data volumes. Digital twin (DT) is a cost-effective solution that can accurately simulate system behaviors and replicate essential functional characteristics of physical system …
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On the decidability of problems in liveness of controlled Discrete Event Systems modeled by Petri Nets
"A Discrete Event System (DES) is a discrete-state system, where the state changes at discrete-time instants due to the occurrence of events. Informally, a liveness property stipulates that a 'good thing' happens during the evolution of a system. Some examples of liveness properties include …
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State estimation and sensor selection in discrete event systems modeled by Petri nets
A discrete event system (DES) is a dynamic system that evolves in accordance with the abrupt occurrence, at possibly unknown and irregular intervals, of physical events. Such systems arise in a variety of contexts, such as energy distribution networks, computer and communication networks, automated …
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Control and diagnosis of real-time systems under finite-precision measurement of time
<p>A discrete event system (DES) is an event-driven system that evolves according to abrupt occurrences of discrete changes (events). The domain of such systems encompasses aspects of many man-made systems such as manufacturing systems, telephone networks, communication protocols, traffic systems, …