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simulation Winter Conference

作者： B.P. Zeigler H.S. Sarjoughian Arizona Center for Integrative Modeling and Simulation Electrical & Computer Engineering Department University of Arizona Tucson Tucson AZ USA

We briefly review the theory of modeling and simulation and its support for constructing distributed simulations. Formal representation of simulation models can contribute to a number of aspects in the modeling and simulation enterprise. Separation of models from simulation execution engines is a prerequisite transferring models among phases of a project as well as from project to project. The Discrete Event System Specification (DEVS) formalism, drawing on its system theoretical basis, provides a number of important properties such as hierarchical, modular composition, universality and uniqueness that can support development of simulation models and environments. A layered architecture for supporting comprehensive M&S environments is discussed that unifies the theoretical framework with implementation in distributed computational environments.

关键词： Object oriented modeling Computational modeling computer architecture Artificial intelligence computer networks Power system modeling computer simulation Workstations Visualization Animation

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Web-Based simulation: Revolution or Evolution?

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ACM Transactions on modeling and computer simulation 2000年第1期10卷 3-17页

作者： Page, Ernest H. Buss, Arnold Fishwick, Paul A. Healy, Kevin J. Nance, Richard E. Paul, Ray J. MITRE Corporation 1820 Dolley Madison Blvd. McLean VA 221021 Operations Research Department Naval Postgraduate School Monterey CA 22102 Department of Computer Engineering University of Florida Gainesville FL 22102 ThreadTec Inc. P.O. Box 7 Chesterfield MO 63017 Systems Research Center Department of Computer Science Virginia Tech Blacksburg VA 24061 Ctr. for Applied Simulation Modeling Brunel University Uxbridge Middlesex UB8 3PH United Kingdom

The nature of the emerging field of web-based simulation is examined in terms of its relationship to the fundamental aspects of simulation research and practice. The presentation, assuming a form of debate, is based on a panel session held at the first International Conference on Web-Based modeling and simulation, which was sponsored by the Society for computer simulation during 11-14 January 1998 in San Diego, California. While no clear "winner" is evident in this debate, the issues raised here certainly merit ongoing attention and contemplation.

关键词： World Wide Web

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Conceptions of curriculum for simulation education

Conceptions of curriculum for simulation education

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simulation Winter Conference

作者： H. Szczerbicka J. Banks R.V. Rogers T.I. Oren H.S. Sarjoughian B.P. Zeigler Institute for Computer Science Fachbereich Mathematik und Informatik University of Hannover Hanover Germany AutoSimulations A Brooks Automation company Marietta GA USA Department of Engineering Management Virginia Modeling Analysis and Simulation Center Old Dominion University Norfolk VA USA Turkish Science and Technical Research Council Marmara Research Center Information Technologies Research and Development Center Gebze Kocaeli Turkey Arizona Center for Integrative Modeling and Simulation Department of Electrical and Computer Engineering University of Arizona Tucson Tucson AZ USA

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Models and representation of their ownership

Models and representation of their ownership

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simulation Winter Conference

作者： H.S. Sarjoughian B.P. Zeigler Dept. of Electr. & Comput. Eng. Arizona Univ. Tucson AZ USA Arizona Center for Integrative Modeling and Simulation Electrical and Computer Engineering Department University of Arizona Tucson Tucson AZ USA

Models, similar to other intellectual properties, are increasingly being treated as commodities worthy of protection. Providing ownership for models is key for promoting model reusability, composability, and distributed simulation. However, to date, it appears no principled approach has been developed to support ownership of models. Instead, individuals such as modelers and legal personnel employ ad hoc means to obtain and (re)use models developed and owned by others. We briefly describe access control capabilities offered by computer languages, operating systems, and HLA ownership management services. The examinations of such methods suggest the need for formal ownership specification. We discuss, in an informal setting, requirements for model ownership from the point of view of increasing demand and necessity for model reuse, distributed simulation, and future trends for collaborative model development. We develop concepts for model ownership suitable for collaborative model development and distributed execution. Based on the developed concepts, we present an approach, within the DEVS modeling and simulation framework, for specifying model ownership. We close with the consideration of the proposed approach for the Collaborative DEVS modeling environment and a brief discussion of HLA services relevant to model ownership.

关键词： Collaboration Computational modeling Intellectual property Protection Law Legal factors Personnel Access control computer languages Operating systems

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VRML for urban visualization

VRML for urban visualization

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simulation Winter Conference

作者： L.A. Belfore R. Vennam Department of Electrical and Computer Engineering Virginia Modeling Analysis and Simulation Center Old Dominion University Norfolk VA USA Digital Fusion Inc. Fairfax VA USA

A virtual reality modeling language (VRML) based application has been developed as a marketing tool for a commercial park. VRML is a new Web based technology for specifying and delivering three-dimensional interactive visualizations over the Internet through a Web browser. As a part of its definition, VRML includes primitives that specify geometries, sense different conditions in in the visualization, and allow custom definition of methods. Geometries and conditions may be linked so that the geometries can be modified or added interactively. The visualization features simple operation, an extensive menu structure, dynamic creation of objects, and an arbitration scheme.

关键词： Visualization Geometry Shape Mice Virtual reality Solid modeling Discrete event simulation Engines Tactile sensors Computational modeling

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OOTW impact analysis [military simulation]

OOTW impact analysis [military simulation]

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simulation Winter Conference

作者： D.S. Hartley R.E. Bell S.L. Packard Data Systems Research and Development Oak Ridge Federal Facilities Center of Modeling Simulation and GamingComputer Science and Mathematics Oak Ridge National Laboratory Oak Ridge TN USA

The conduct of Operations Other Than War (OOTWs) has become an extremely important part of the US military's responsibility since the end of the Cold War. The factors that influence success and failure in OOTWs are economic, political, sociological, cultural, and psychological factors more often than they are military factors. The paper explores the need for impact analysis support tools, provides a description of the required elements of such tools, and recommends a formal process for creating OOTW impact analysis tools.

关键词： Psychology Failure analysis Weapons Military computing Data systems Research and development Business Cultural differences Disaster management Personnel

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Definition of evaluation criteria for system development acquisition modeling and simulation

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NAVAL ENGINEERS JOURNAL 1999年第1期111卷 55-64页

作者： Leite, MJ Mensh, DR Michael J. Leite:is a Principal Engineer with PRC Inc. a division of Litton Industries. He supports combat system engineering for theater air and missile defense. His other tasks have included the command and control for the AEGIS shipbuilding program systems engineering for the 21st Century Surface Combatant combat system survivability and the development of NATO standardization agreements for naval ordnance. He was previously a Senior Engineer with San Diego Gas & Electric with responsibility for its energy application and lighting programs. Prior to joining SDG&E Mr. Leite was a commissioned officer in the U.S. Navy where he served in operations and engineering assignments. Following active duty he accepted a Naval Reserve commission and has retired with the rank of Captain. His assignments included command operational and engineering tours. Mr. Leite has also served as an expert witness in admiralty and engineering matters. He is a gradate of the University of California Berkeley with a Bachelor of Science Degree in Engineering and also holds a Masters Degree in Business Administration from National University in San Diego. Mr. Leite is a Registered Professional Engineer in the States of California and Minnesota. Mr. Leite is a member of ASNE ASCE MORS the Illuminating Engineering Society and the U.S. Naval institute. Dennis Roy Mensh:is a Senior Engineer with PRC Inc. a division of Litton Industries in Crystal City VA where he supports modeling and simulation tasking for combat systems. He received BS and MS degrees in applied Physics from Lopola College in Baltimore MD and the American University in Washington DC. He has also completed the course work towards a Ph.D. degree in computer science specializing in the fields of Operations Reseurch Anabsis Systems Analysis and Computer Modeling and Simulation. Previously he was employed at the White Oak Laboratory of the Naval Surface Warfare Carter in Silver Spring MD where he worked in the areas of naval sensor and weapon system analysis

This paper defines, develops and examines a set of generic analysis tools that can be applied to Models and simulations at the Systems Engineering level of fidelity. The tools examine the performance and effectiveness of Sensors;Weapons;and Battle Management, Command, Control, Communications, computers, and Intelligence ((BMCI)-I-4) systems and equipment. The Measures of Performance (MOPs), Measures of Effectiveness (MOEs) and Measures of Force Effectiveness (MOFEs) were extracted from the Modular Command and Control Structure Paradigm which was developed at the Naval Postgraduate School. The paradigm provides for the development of evaluation criteria (MOPs, MOEs, and MOFEs) in a framework that ensures the traceability of system performance and effectiveness to the system operational requirements as specified in the Operational Requirements Document (ORD). Also, the analysis tools provide insight and valid estimates of numerical measures of the defined system functionality threads, which represent the system's operational requirements as specified in the ORD. The tools are directly transferrable and applicable to test and evaluation exercise events which are conducted in support of the development and acquisition of systems and equipment. Once the levels of system performance have been defined, the Paradigm generates a quantitative database that becomes a useful tool in system tradeoffs and selection. Once the alternative system suites have been defined, the suites can be analyzed in terms of system functionality threads and their corresponding performance capabilities versus cost.

关键词： Naval vessels

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A technology overview for a proposed Navy surface combatant DC Zonal Electric Distribution System

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NAVAL ENGINEERS JOURNAL 1999年第3期111卷 59-69页

作者： Ciezki, JG Ashton, RW John G. Ciezki:received his B.S. E. E. M.S.E.E. and Ph.D. from Purdue University in 1988 1990 and 1993 respectively. While working on his degrees he has done extensive research fm P. C. Krause and Associates in electric drive modeling and simulation. Following post-doctorate work at Purdue he joined the staff at the Naval Postgraduate School in 1994 as an Assistant Professor in the area of Power Systems. Robert W. Ashton:graduated from Virginia Polytechnic Institute with a B.S.E.E. in 1982. He worked for Unisys Corporation as a Component Engineer until returning to school in 1986. He received his M.S.E.E. in 1989 from Worcester Polytechnic Institute. He earned a Ph.D. in the area of power electronics while a fellow with Northeast Utilities in Connecticut. He currently holds the position of Associate Professor in the Department of Electrical and Computer Engineering at the Naval Postgraduate School in Monterey GI.

The U.S. Navy is currently investigating the implementation of a DC Zonal Electric Distribution System (DC ZEDS) as a component of an Integrated Power System (IPS) for the next generation of surface combatant. In replacing the current ac radial distribution system, significant gains can be realized in terms of survivability, weight, manning and cost. DC ZEDS is predicated on having starboard and port de busses feeding electrical zones delineated by watertight bulkhead compartments. The main bus de voltage is stepped down within the zone and then converted to three-phase ac and lower voltage de by additional power converters. Due to the large interconnection of tightly-regulated power converters in a stiffly-connected system, negative input impedance effects create the possibility of unwanted resonances. In this paper the authors describe the rationale for the de zonal system, characterize the key components, and highlight the stability issues.

关键词： direct current Fluconazole Navy dispensing system Electricity

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Dynamic autonomous agents: game applications

Dynamic autonomous agents: game applications

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computer Animation

作者： S. Goldenstein E. Large D. Metaxas Center for Human Modeling and Simulation Computer and Information Science Department University of Pennsylvania Philadelphia PA USA

Presents a method for the generation of real-time dynamic autonomous agents in game environments. The method is based on the use of dynamical systems theory which allows us to express intelligent behaviors using systems of differential equations. These differential equations operate at two distinct levels. At one level, the differential equations governing movement comprise a carefully designed set of attractor-repeller fields. At a second level, behavior selection is modeled using a competition dynamics that determines the relevant contributions to the movement dynamics at each time instant. Thus, our autonomous agents are capable of exhibiting useful behaviors in complex environments. Using this approach, we are able to demonstrate, in real time, behaviors such as single and multiple target tracking with both stationary and moving obstacles.

关键词： Autonomous agents Equations Nonlinear dynamical systems Animation Application software Humans Computational modeling computer simulation Information science Programmable logic arrays

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Gesticulation behaviors for virtual humans

Gesticulation behaviors for virtual humans

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Pacific Conference on computer Graphics and Applications

作者： Liwei Zhao N.I. Badler Center for Human Modeling and Simulation Department of Computer and Information Science University of Pennsylvania Philadelphia PA USA

Gesture and speech are two very important behaviors for virtual humans. They are not isolated from each other but generally employed simultaneously in the service of the same intention. An underlying PaT-Net parallel finite state machine may be used to coordinate them both. Gesture selection is not arbitrary. Typical movements correlated with specific textual elements are used to select and produce gesticulation online. This enhances the expressiveness of speaking virtual humans.

关键词： Humans Kinematics Speech synthesis Computational modeling computer simulation Information science Avatars Concrete Shape Turning

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