Discrete-Event Simulation is an event-driven simulation in which a real dynamic process is imitated as it progresses over time. It has been recognized as a powerful technique for the quantitative analysis of complex construction operations. The two main DES strategies for modelling construction operations are Process Interaction (PI) and Activity Scanning (AS). Although each strategy has its ow...

Genetic algorithms have during the recent years gained popularity also in the domain of chemical engineering, among other applications for scheduling purposes. A genetic algorithm builds new sequences by combining and mutating previous sequences of genes, i.e. chromosomes, into a new set of chromosomes. In this new set, only the fittest survive, and the procedure is repeated. As a schedule in c...

Swarm robotics systems can be categorized as discrete event systems (DES) and can therefore be subjected to DES modeling and analysis tools. Taking on the same approach and considering successful application of matrices to model complex DES like flexible manufacturing systems, we present here a novel matrix formulation to model emergent coherent movement of a wirelessly connected swarm of robot...

Structural Steel Fabrication is a process in which there is a wide variety of product mix and where most of the products are unique in nature. A lot of work has been done to analyze the use of Discrete Event Simulation in various manufacturing and construction projects for application of lean concepts and other purposes to detect opportunities for optimization. However, there is a lot of differ...

Researcher: Xiaoqing Deng Title: AN AIRCRAFT EVACUATION SIMULATION BASELINE USING DES FOR PASSENGER PATH PLANNING Institution: Embry-Riddle Aeronautical University Degree: Master of Science in Aeronautics Year: 2016 This paper introduced a Discrete Event Simulation (DES) model that simulates passengers’ evacuation paths and decision-making processes during aircraft certification. The model was ...

With the adoption of integration and system perspectives in managing the manufacturing systems and the pressure imposed by the increased competition and rapidly changing business environment, the need has arisen for new approaches for simulating the manufacturing enterprise. We have proposed SDDES; a hybrid System Dynamics Discrete Event Simulation approach to simulating the integrated manufact...

The Regional Agency for Health and Social Care, (ASSR) of Emilia Romagna, a regional research center for innovation and improvement, is trying to understand how Discrete Event Simulation (DES) technique can be incorporated to support decision making in the field of health services. Most of decision support systems used by regional and local health planners face problems from the epidemiological...

The authors consider identifying an unknown discrete event system (DES) as recognition of characteristic functions of a discrete event systems specification (DEVS) model that validly represents the system. Such identification consists of two major steps: behavior learning using a specially designed neural network and extraction of a DEVS model from the learned neural network. This paper present...

Submitted for the DPP06 Meeting of The American Physical Society New time-adaptive technique for stiff gas dynamics and MHD Y.A. OMELCHENKO, H. KARIMABADI, SciberQuest, Inc/UCSD, M.L. GOLDSTEIN, A.V. USMANOV, NASA Goddard Space Flight Center — We present a new time-accurate algorithm for explicit integration of multi-scale gas dynamics and MHD equations. Unlike conventional time-stepping scheme...