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Resultados filtrados por Publicador: Monterey, California. Naval Postgraduate School

Mathematical modeling using MATLAB

Phillips, Donovan D.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: viii, 123 p.;28 cm.
EN_US
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36.35%
Approved for public release; distribution is unlimited; Mathematical modeling forms a bridge between the study of mathematics and the application of mathematics with the intent of explaining or predicting real world behavior. In their book A First Course in Mathematical Modeling, Frank R. Giordano, Maurice D. Weir, and William P. Fox provide an introduction to the entire modeling process. Model verification, an important step(in the modeling process, often requires the analysis of vast amounts of data, making computational support essential. Mathematical Modeling Using MA MATLAB acts as a companion resource to A First Course in Mathematical Modeling with the goal of guiding the reader to a fuller understanding of the modeling process through the employment of MATLAB's powerful computational capabilities. In it, the reader is led through a series of examples, each building upon the previous, which apply MATLAB's computational power to various modeling scenarios. While not intended as a text in modeling, Mathematical Modeling Using MA TIAB is a useful resource for the novice modeler interested in tackling problems too large to be performed manually; http://www.archive.org/details/mathematicalmode00phil; Captain, United States Army

Modeling reduced human performance as a complex adaptive system

Wellbrink, Joerg C. G.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Formato: xviii, 194 p. : ill. (some col.) ; 28 cm.
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46.14%
Approved for public release; distribution is unlimited; Current cognitive models not only lack flexibility and realism, they fail to model individual behavior and reduced performance. This research analyzes current cognitive theories (namely, symbolism, connectionism, and dynamicism). It hypothesizes that reduced human performance can be best modeled as a complex adaptive system. The resulting multi-agent model "Reduced Human Performance Model (RHPM)" implements reactive agents competing for cognitive resources. Lack of resources is used to trigger the simulation of imperfect perception and imperfect cognition. The simulation system is calibrated with human experimental data in scenarios involving vigilance decrement, wherein vigilance is decreased during the first 30 minutes of a screening task. RHPM is then validated against previous unknown vigilance task scenarios. RHPM generates realistic reduced human performance with a new cognitive modeling hypothesis. The developed multi-agent system generates adaptive and emergent behavior. Its use for computer generated forces (i.e. radar screen operator) would improve the realism of simulation systems by adding human like reduced performance. This research's main contribution is the development of a well suited tool to mediate between vigilance theories such as signal detection theory and experimental data. It generates insights creating likely hypotheses to improve the theories.; Major...

Savage Modeling and Analysis Language (SMAL) metadata for tactical simulations and X3D visualizations

Rauch, Travis M.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxvi, 264 p. : col. ill. ;
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46.2%
Visualizing operations environments in three dimensions (3D) supports the warfighters' ability to make rapid, well-informed decisions by presenting complex systems in a naturalistic, integrated display format. Unfortunately, constructing these environments is a time-consuming task requiring specific expertise not typically available in the command center. The future use of 3D visualization in military operations depends on the ability of personnel with minimal graphics experience to create virtual environments quickly and accurately by leveraging data-driven customization of content from model archives with the data available in the command center. Practical 3D visualization depends on standardized scene autogeneration. The Extensible 3D (X3D) Graphics family of specifications is approved by the International Standards Organization (ISO) as the Web-based format for the interchange and rendering of 3D scenes. Previous work has demonstrated that an archive of X3D scenes, such as the Scenario Authoring and Visualization for Advanced Graphical Environments (SAVAGE) library, can be used to autogenerate sophisticated 3D tactical environments. Assembling and making sense of the data necessary to autogenerate a 3D environment requires context and good documentation...

Improving Maritime Prepositioning Force (MPF) offloads using modeling and simulation

Thomas, Brandon K.
Fonte: Monterey, California. Naval Postgraduate School Publicador: Monterey, California. Naval Postgraduate School
Tipo: Tese de Doutorado Formato: xxiv, 89 p. : ill. (chiefly col.) ;
Relevância na Pesquisa
46.14%
The Marine Corps' Maritime Prepositioning Force (MPF) marries fly-in troops to their gear in an expeditionary environment. The arrival and assembly operation underneath this larger umbrella of MPF Operations proves itself a somewhat chaotic, definitively complex and dynamic logistics operation. From the moment the offload of the ship or ships begins when equipment and rolling stock exit the ships, until it ends as using units sign for their intended equipment, all personnel involved in this process--drivers, assistant drivers, heavy equipment handlers, crane operators, equipment managers--and all equipment involved present a flurry of activity that must be effectively managed, tracked, and optimized. Modeling, Virtual Environments, and Simulation, or MOVES, tools, aid in providing such capability. The creation of a Discrete Event Simulation (DES) using the open-source tool Viskit enables MPF planning, training, and analysis in its ability to portray the effects that size, amount of personnel support, and time have on the operation. Scenario Authoring and Visualization for Advanced Graphical Environments (Savage) comprises an archive of extensible three dimensional (3D) models that, when tied to the DES in an Extensible 3D (X3D) Graphics environment...