Topic
Modeling and simulation
About: Modeling and simulation is a research topic. Over the lifetime, 10273 publications have been published within this topic receiving 111550 citations.
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11 Jul 2001
TL;DR: The approach is to show the difference from others in that it supports a hierarchical and modular modeling environment, and generates the command-level behavior of cyber attack scenario, and provides an efficient model building environment based on the experimental frame concept.
Abstract: The major objective of this paper is to develop the network security modeling and cyber attack simulation that is able to classify threats, specify attack mechanisms, verify protection mechanisms, and evaluate consequences. To do this, we have employed the advanced modeling and simulation concepts such as System Entity Structure / Model Base framework, DEVS (Discrete Event System Specification) formalism, and experimental frame concept underlying the object-oriented S/W environment. Our approach is to show the difference from others in that (i) it supports a hierarchical and modular modeling environment, (ii) it generates the command-level behavior of cyber attack scenario, (iii) it provides an efficient model building environment based on the experimental frame concept, and (iv) it supports the vulnerability analysis of given node on the network. Simulation test performed on sample network system will illustrate our techniques.
66 citations
01 Nov 2013
66 citations
TL;DR: In this paper, the basic concepts behind different modeling approaches applied to simulate AM microstructure evolution of metals are discussed and a critical discussion on the range of applicability and the predictive power of each model is finally identified future tasks.
Abstract: Beam-based additive manufacturing (AM) of metallic components is characterized by extreme process conditions. The component forms in a line-by-line and layer-by-layer process over many hours. Locally, the microstructure evolves by rapid and directional solidification. Modeling and simulation is important to generate a better understanding of the resultant microstructure. Based on this knowledge, the AM process strategy can be adapted to adjust specific microstructures and in this way different mechanical properties. In this review, we explain the basic concepts behind different modeling approaches applied to simulate AM microstructure evolution of metals. After a critical discussion on the range of applicability and the predictive power of each model, we finally identify future tasks.
65 citations
TL;DR: In this article, a model comparison approach based on material flow systems is investigated that is divided into a microscopic and a macroscopic model scale, where on the microscopic model scale particles are simulated using a model based on Newton dynamics borrowed from the engineering literature.
65 citations