Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 341 for “"discrete event"”.
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Terminating parallel discrete event simulations
… conditions and collecting output measures in discrete event simulations. With regard to parallel simulations, this problem is inherently more difficult than the classic termination detection problem for two reasons. The first is that parallel simulation processes are often written as …
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Discrete Event Control in Manufacturing Automation
In this research, several SCT and design software tools are being developed to provide different services for manufacturing automations. They are FBSCT, supporting software package for supervisory control logic design and verification; Open HMI Builder, an easy-use GUI development tool; and …
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Spacecraft-ns3: Spacecraft Discrete-Event Network Simulation
… Spacecraft-ns3 propagates orbit state, plans discrete events, and analyzes network metrics and flows. A case study using Spacecraft-ns3 is presented for exploratory space network analysis.
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Discrete event calculus using Semantic Web technologies
… developed commonsense reasoning formalism called Discrete Event Calculus (DEC). It aims to show to what extent DEC reasoning can be applied to Semantic Web data, using the Semantic Web standards and supporting development environments available for the purpose in 2008, when the research programme …
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Improved Time Representation in Discrete-Event Simulation
Discrete-Event Simulation (DES) is a technique in which the simulation engine plays a history following a chronology of events. The technique is called ”discrete-event” because the processing of each event of the chronology takes place at discrete points of a continuous time-line. In computer …
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Synchronous failure diagnosis of discrete-event systems
… a new approach for the failure diagnosis of discrete event systems is introduced. The method is based on the computation of a Petri net diagnoser, called synchronized Petri net diagnoser (SPND), that is constructed from the nonfailure behavior of the modules of the system. We also introduce …
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Improved Techniques for Parallel Discrete Event Simulation
… describe how a modeler can create SAN models of discrete event systems, partition and map a model to a target architecture, simulate using a number of PDES algorithms, and obtain performance data for the PDES algorithms used.
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Complex system analysis through discrete event simulation
… group at Amazon has recently invested in Discrete Event Simulation technology. This thesis focuses on the creation of a discrete event simulation of the Fernley, NV semi-automated distribution center's outbound flow process. More specifically, the business subjects investigated include: …
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Conceptual frameworks for discrete event simulation modeling
… necessary for successful model representation of discrete-event systems. The taxonomy provides a useful and meaningful classification of CFs and produces insights in to the conceptual relationships that exist among them. The characteristics of CFs that are desired to enable the development of …
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Opacity Of Discrete Event Systems: Analysis And Control
… may leak confidential</p> <p>information as a discrete event system. The problem that has not investigated</p> <p>intensively is the enforcement of opacity properties by supervisory control. In other</p> <p>words, constructing a minimally restrictive supervisor to limit the system's behavior …
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Evaluation of alternative discrete-event simulation experimental methods
… non-experts produce meaningful, non-terminating discrete event simulations studies. The exemplar used was manufacturing applications, in particular sequential production lines. The thesis addressed the selection of methods for introducing randomness, setting the length of individual simulation …
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Pose: Scalable General-Purpose Parallel Discrete Event Simulation
… examine the overhead required for synchronizing events to obtain correct results in parallel and develop a new approach to the structure of model entities and mechanisms for PDES that help to reduce that overhead. Secondly, we design new adaptive synchronization strategies that exploit this new …
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Improving ICU patient flow through discrete-event simulation
… and emergency care. 90% of SICU patients are eventually transferred to another unit in the hospital. Frequent and sometimes lengthy non-clinical delays in this transfer process can be primarily attributed to congestion in downstream units. Multivariable regression analysis demonstrates that …
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Equipment protective capacity optimization using discrete event simulation
… between tool sets caused by WIP flow. This prevents static models from predicting the values and variabilities of factory outputs and throughput times (TPT) with sufficient accuracy to optimize the business. Discrete event simulations have the inherent advantage of modeling factory dynamics. …
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The cost of terminating parallel discrete-event simulations
Simulation models use many different rules to decide when to terminate. Parallel simulations generally use a single, simple rule: each process comprising the simulation terminates after a predefined period of time. A number of parallel simulation protocols have been proposed that enforce …
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Model specification and analysis for discrete event simulation
… fundamental to the specification and analysis of discrete event models. A model specification language is developed which allows analysis of a model specification as the specification is being developed. Model analyses are discussed which (1) detect several types of errors in a model …
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Optimal payoff to ensure opacity in Discrete-Event Systems
… to reveal some information. To enforce opacity, discrete-event systems have been employed and many algorithms are proposed. One naive way of achieving opacity is to hide everything. However, in many applications this is not possible either due to legal obligations or due to the requirement of …
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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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