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Full-Text Articles in Engineering
Analysis And Integration Of A Debris Model In The Virtual Range Projec, Luis Robledo
Analysis And Integration Of A Debris Model In The Virtual Range Projec, Luis Robledo
Electronic Theses and Dissertations
After the accident of the STS 107 Columbia Space Shuttle, great concern has been focused on the risk associated to the population on the ground. Before this accident happened, re-entry routes as well as risk calculation of were not of public concern. Two issues that have been raised from this lamentable accident relate to spacecraft security and to public safety. The integration of a debris model has been part of the original conceptual architecture of the Virtual Range Project. Its integration has been considered as a specific research due to the complexity of the models and the difficulties to obtain …
Evaluation Of The Impacts Of Its Information Strategies On I-4 Corridor, Yueliang Zuo
Evaluation Of The Impacts Of Its Information Strategies On I-4 Corridor, Yueliang Zuo
Electronic Theses and Dissertations
This study evaluated the impacts of ITS information strategies under incident conditions in Interstate 4 (I-4) corridor of Orlando. The analysis was performed using DYNASMART-P software package. The ITS information strategies range from pre-trip information, en-route information, and variable message signs. Simulation covered one hour during the morning peak period. The impacts of ITS information strategies on mobility were evaluated by simulating the performance of various ITS information components (pre-trip information, en-route information, and variable message signs) under incident conditions for the I-4 corridor and comparing the results with the corresponding scenarios in the absence of these components. The traffic …
Evolving Models From Observed Human Performance, Hans Karl Gustav Fernlund
Evolving Models From Observed Human Performance, Hans Karl Gustav Fernlund
Electronic Theses and Dissertations
To create a realistic environment, many simulations require simulated agents with human behavior patterns. Manually creating such agents with realistic behavior is often a tedious and time-consuming task. This dissertation describes a new approach that automatically builds human behavior models for simulated agents by observing human performance. The research described in this dissertation synergistically combines Context-Based Reasoning, a paradigm especially developed to model tactical human performance within simulated agents, with Genetic Programming, a machine learning algorithm to construct the behavior knowledge in accordance to the paradigm. This synergistic combination of well-documented AI methodologies has resulted in a new algorithm that …
Autonomous Environmental Mapping In Multi-Agent Uav Systems, Linus Jan Luotsinen
Autonomous Environmental Mapping In Multi-Agent Uav Systems, Linus Jan Luotsinen
Electronic Theses and Dissertations
UAV units are by many researchers and aviation specialists considered the future and cutting edge of modern flight technology. This thesis discusses methods for efficient autonomous environmental mapping in a multi-agent domain. An algorithm that emphasizes on team work by sharing the agents local map information and exploration intentions is presented as a solution to the mapping problem. General theories on how to model and implement rational autonomous behaviour for UAV agents are presented. Three different human and tactical behaviour modeling techniques are evaluated. The author found the CxBR paradigm to be the most interesting approach. Also, in order to …
An Approach To Automating Data Collection For Simulation, Irin Portnaya
An Approach To Automating Data Collection For Simulation, Irin Portnaya
Electronic Theses and Dissertations
In past years many industries have utilized simulation as a means for decision making. That wave has introduced simulation as a powerful optimization and development tool in the manufacturing industry. Input data collection is a significant and complex event in the process of simulation. The simulation professionals have grown to accept it is as a strenuous but necessary task. Due to the nature of this task, data collection problems are numerous and vary depending on the situation. These problems may involve time consumption, lack of data, lack of structure, etc. This study concentrates on the challenges of input data collection …
Measuring The Effect Of Erratic Demandon Simulated Multi-Channel Manuf, Nancy Kohan
Measuring The Effect Of Erratic Demandon Simulated Multi-Channel Manuf, Nancy Kohan
Electronic Theses and Dissertations
To handle uncertainties and variabilities in production demands, many manufacturing companies have adopted different strategies, such as varying quoted lead time, rejecting orders, increasing stock or inventory levels, and implementing volume flexibility. Make-to-stock (MTS) systems are designed to offer zero lead time by providing an inventory buffer for the organizations, but they are costly and involve risks such as obsolescence and wasted expenditures. The main concern of make-to-order (MTO) systems is eliminating inventories and reducing the non-value-added processes and wastes; however, these systems are based on the assumption that the manufacturing environments and customers' demand are deterministic. Research shows that …
Predicting Air Quality Near Roadway Intersections Through The Applicat, Brian Kim
Predicting Air Quality Near Roadway Intersections Through The Applicat, Brian Kim
Electronic Theses and Dissertations
With substantial health and economic impacts attached to many highway-related projects, it has become imperative that the models used to assess air quality be as accurate as possible. The United States (US) Environmental Protection Agency (EPA) currently promulgates the use of CAL3QHC to model concentrations of carbon monoxide (CO) near roadway intersections. This model uses steady-state and macroscopic methods to model the physical phenomena (e.g., emission rates, atmospheric dispersion, etc.) occurring at intersections. These methods are not straightforward and unintuitive for the users. Therefore, this project investigated the possibility of developing a model that is theoretically more realistic and flexible …