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Effect of temperature variation on pavement responses using 3D multilayered elastic analysis

International Journal of Pavement Engineering 2007年第3期8卷 203-212页

作者： Alkasawneh, Wael Pan, Ernian Han, Feng Zhu, Ronghua Green, Roger Computer Modeling and Simulation Group Department of Civil Engineering University of Akron Akron OH 44325-3905 United States Ohio Department of Transportation 1980 West Broad Street Columbus OH 43223 United States

The response of flexible pavement is largely influenced by the resilient modulus of the pavement profile. Different methods/approaches have been adopted in order to estimate or measure the resilient modulus of each layer assuming an average modulus within the layer. To account for the variation in the modulus of elasticity with depth within a layer, the layer should be divided into several sublayers and the modulus should be gradually varied between the layers. A powerful and innovative program has been developed utilizing the unique propagator matrix method and the cylindrical system of vector functions. Our new program can predict accurately and efficiently the response of flexible pavements of any number of layers/sublayers. Numerical results in this paper showed that, instead of assuming one response due to an average modulus, modulus variation with depth should be considered in any pavement analysis since it can capture the response envelopes of the pavement.

关键词： Pavements

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Complexities of simulating a hybrid agent-landscape model using multi-formalism composability

Complexities of simulating a hybrid agent-landscape model us...

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2007 Agent Directed simulation Symposium, ADS 2007

作者： Mayer, Gary R. Sarjoughian, Hessam S. Arizona Center for Integrative Modeling and Simulation Computer Science and Engineering Department School of Computing and Informatics Arizona State University TempeAZ United States

ISBN: (纸本)1565553136

Hybrid agent-landscape models are used as an environment in which to study humans, the environment, and their dynamics. To provide flexibility in model design, expressiveness, and modification, the environment models and human agent models should be developed independently. While retaining each model's individuality, the models can be composed to create a model of a complex, hybrid agent-landscape system. This should allow for a much more in-depth analysis of each model independently, as well as a study of their interactions. To create such a modeling environment requires a look beyond a simple interface between two models. It may require that the models' formalisms be composed, their execution be synchronized, their architectures be integrated, and a common visualization be created to provide a whole-system data view during simulation. This paper discusses the complexities of such an undertaking.

关键词： Cellular automata

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An exploration-based taxonomy for emergent behavior analysis in simulations

An exploration-based taxonomy for emergent behavior analysis...

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2007 Winter simulation Conference, WSC

作者： Gore, Ross Reynolds Jr., Paul F. Modeling and Simulation Technology Research Initiative Department of Computer Science University of Virginia 151 Engineer's Way P.O. Box 400740 Charlottesville VA 22904-4740 United States

ISBN: (纸本)1424413060

Emergent behaviors in simulations require explanation, so that valid behaviors can be separated from design or coding errors. We present a taxonomy, to be applied to emergent behaviors of unknown validity. Our goal is to facilitate the explanation process. Once a user identifies an emergent behavior as a certain type within our taxonomy, exploration can commence in a manner befitting that type. Exploration based on type supports narrowing of possibilities and suggests exploration methods, thus facilitating the exploration process. Ideally, a taxonomy would be robust, allowing reasonable variation in behavior type assignment without penalty in cost or correctness during the exploration process. The taxonomy we present is robust, comprehensive and suitable for use with our established emergent behavior exploration methods. In addition to the taxonomy, we present our design rationale, and a summary of results from a test application of our taxonomy. © 2007 IEEE.

关键词： Taxonomies

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DEVS/NS-2 Environment;Integrated tool for efficient networks modeling and simulation

DEVS/NS-2 Environment;Integrated tool for efficient networks...

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3rd DEVS Integrative M and S Symposium, DEVS 2007, Part of the 2007 Spring simulation Multiconference, SpringSim 2007

作者： Kim, Taekyu Hwang, Moon Ho Kim, Doohwan Zeigler, Bernard P. Electrical and Computer Engineering Department Arizona Center for Integrative Modeling and Simulation University of Arizona Tucson AZ 85721 United States RTSync Corp. 4731 E Southern Ave Phoenix AZ 85042 United States

DEVS/NS-2 is a new integrated network simulation tool that provides efficient high and low level network modeling capabilities. DEVS (Discrete Event System Specification) serves as a base framework to support well-defined mathematical formalism specification for structure and behavior of dynamic systems. The NS-2 is a discrete event network simulator, whose primary use is intended to build and run various detailed network models and protocols. The interoperable simulation of the two powerful modeling and simulation systems, DEVS and NS-2, allows to attain significant benefits in terms of reduction of the cost, increased high and low level networks modeling power, and enhanced reusability.

关键词： Wireless sensor networks

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DEVS/NS-2 environment;Integrated tool for efficient networks modeling and simulation

DEVS/NS-2 environment;Integrated tool for efficient networks...

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2007 Agent Directed simulation Symposium, ADS 2007

作者： Kim, Taekyu Hwang, Moon Ho Kim, Doohwan Zeigler, Bernard P. Arizona Center for Integrative Modeling and Simulation Electrical and Computer Engineering Department University of Arizona TucsonAZ85721 United States RTSync Corp. 4731 E Southern Ave. PhoenixAZ85042 United States

ISBN: (纸本)1565553136

关键词： Wireless sensor networks

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Incorporating a PMF-Based Injury Model into a Multi-Agent Representation of Crowd Behavior

Incorporating a PMF-Based Injury Model into a Multi-Agent Re...

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ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing (SNPD)

作者： Frederic D. McKenzie Herbie H. Piland Min Song Department of Electrical and Computer Engineering Virginia Modeling Analysis and Simulation Center (VMASC) Old Dominion University Norfolk VA USA Department of Electrical and Computer Engineering Virginia Modeling Analysis and Simulation Center (VMASC) Old Dominion University Norfolk VA

Throughout the years, much research has been conducted on human behavior models that focus on individual intelligent human agents. Fewer multi-agent based models have addressed group or crowd behavior from a psychological and sociological perspective. We have been focused on incorporating crowd behavior models into control force (police and military) simulations and have developed a real-time crowd simulation capable of generating multiple intelligent agent civilians that exhibit a variety of realistic individual and group behaviors at differing levels of fidelity. One important aspect of modeling realistic crowd behaviors is determining the physiological effects of weapons, both non-lethal and lethal alike, on humans. To this end, we present our categories of non-lethal weapons and their physiological effects that need to be represented. Additionally, this paper describes an injury model developed by the University of Pennsylvania and its integration into our Crowd Federate.

关键词： Injuries Humans Weapons Intelligent agent Force control Decision making Software engineering Artificial intelligence Distributed computing Computational modeling

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Network traffic analysis system based on data engineering methodology using system entity structure

Network traffic analysis system based on data engineering me...

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2nd International Conference on Convergent Information Technology, ICCIT 07

作者： Kim, Taekyu Han, Youngshin Cheon, Saehoon Zeigler, Bernard P. Arizona Center for Integrative Modeling and Simulation Electrical and Computer Engineering Department University of Arizona Tucson AZ 85721 United States School of Engineering Inha University 253 Yonghyun-Dong Nam -Gu Incheon 402-751 Korea Republic of

ISBN: (纸本)0769530389

Currently network uses, especially the number of internet users, increase rapidly. Also, high quality of service is required and this requirement results a sudden network traffic increment. As a result, an efficient management system for huge network traffic becomes an important issue. The System Entity Structure (SES) using data engineering concepts enables network administrators to access traffic data easily and efficiently. The network traffic analysis system, which is studied in this paper, is an effective management system with a high throughput and a low response time designed and implemented based on a model and simulation based data engineering methodology. Extensible Markup Language (XML) is used for metadata language in this system. © 2007 IEEE.

关键词： XML

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An ontology-based dictionary of understanding as a basis for software agents with understanding abilities

An ontology-based dictionary of understanding as a basis for...

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2007 Agent Directed simulation Symposium, ADS 2007

作者： Ören, Tuncer I. Ghassem-Aghaee, Nasser Yilmaz, Levent M and SNet Ottawa Center of the MISS SITE University of Ottawa OttawaON Canada Beykent University Istanbul Turkey Department of Computer Engineering University of Isfahan Isfahan Iran M and SNet: Auburn Modeling and Simulation Laboratory Computer Science and Software Engineering Auburn University AuburnAL United States

Nearly 60 types of machine understanding is presented in an ontology-based dictionary as a basis for the development of software agents with understanding abilities. Then a framework for software agents is presented.

ISBN: (纸本)1565553136

关键词： Software agents

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A co-design modeling approach for computer network systems 07

A co-design modeling approach for computer network systems

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simulation Winter Conference

作者： Weilong Hu Hessam S. Sarjoughian Arizona Center for Integrative Modeling & Simulation Computer Science and Engineering Department Arizona State University Tempe AZ USA

ISBN: (纸本)9781424413065

Co-design modeling is considered key toward handling the complexity and scale of network systems. The ability to separately specify the software and hardware aspects of computer network systems offers new capabilities beyond what is supported in modeling frameworks and tools such as NS-2 and OPNET. The DEVS/DOC simulation environment supports logical co-design specification based on the distributed object computing (DOC) abstract model. To overcome DEVS/DOC's lack of support for visual and persistent modeling, this paper presents SESM/DOC, a novel approach, which is based on the scaleable entity structure modeler (SESM), a component-based modeling framework. This approach supports logical, visual and persistent modeling. Modelers can develop software and hardware models separately and systematically integrate them to specify a family of computer network system designs. This paper details the SESM/DOC co-design modeling approach with the help of a search engine system example, and presents a discussion for future research directions.

关键词： computer networks Hardware Computational modeling Distributed computing Routing computer simulation Software tools Application software Network synthesis Network topology

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DEVS Systems-Theory Framework for Reusable Testing of I/O Behaviors in Service Oriented Architectures

DEVS Systems-Theory Framework for Reusable Testing of I/O Be...

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IEEE International Conference on Information Reuse and Integration (IRI)

作者： Xiaolin Hu Bernard P. Zeigler Moon Ho Hwang Eddie Mak Computer Science Department Georgia State University Atlanta GA USA Arizona Center for Integrative Modeling and Simulation University of Arizona Tucson Tucson AZ USA

This paper presents a framework for testing at the I/O behavior level in a service-oriented architecture (SOA) environment. The framework derives minimal testable I/O pairs from a service component's behavior specifications. These minimal testable I/O pairs are mapped to reusable primitives and then synthesized into test models in the Discrete Event System Specification (DEVS) formalism to meet different test objectives. We present the system theoretic foundation for I/O behavior testing and describe the inherently re-usable test development framework.

关键词： System testing Service oriented architecture Automatic testing Software testing Large-scale systems Collaboration Collaborative work Web services Logic testing Application software

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