Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 83 for “"agent-based models"”.
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Smarter Agents for Agent-Based Models
Agent-based models (ABMs) are powerful tools for decision-making due to their ability to simulate systems with individual-level granularity. Recent advances have mitigated the computational costs of scaling ABMs to real-world population sizes; however, the potential of ABMs is also constrained by …
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Optimization and Optimal Control of Agent-Based Models
Agent-based models are computer models made up of agents that can exist in a finite number of states. The state of the system at any given time is determined by rules governing agents' interaction. The rules may be deterministic or stochastic. Optimization is the process of finding a solution that …
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Inverse Problems in Agent-Based Models of Spatial Phenomena
Learning individual (agent) behaviours from aggregate summary statistics constitutes a fundamental inverse problem in the study of socio-physical systems. This thesis examines a key facet of this problem that involves inferring the discrete origin-destination matrix (ODM) of agent trip counts …
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Techniques for mathematical analysis and optimization of agent-based models
Agent-based models are computer simulations in which entities (agents) interact with each other and their environment according to local update rules. Local interactions give rise to global dynamics. These models can be thought of as in silico laboratories that can be used to investigate the system …
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A Genetic Programming Approach to Solving Optimization Problems on Agent-Based Models
… optimization problems that are defined on agent-based models (ABM). The approach utilizes concepts in genetic programming (GP) and is demonstrated here using an optimization problem on the Sugarscape ABM, a prototype ABM that includes spatial heterogeneity, accumulation of agent resources, …
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Agent-based models to couple natural and human systems for watershed management analysis
This dissertation expands conventional physically-based environmental models with human factors for watershed management analysis. Using an agent-based modeling framework, two approaches, one based on optimization and the other on data mining-are applied to modeling farmers' pumping decision-making …
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Calibrating high frequency trading data to agent based models using approximate Bayesian computation
… ABC) as a method of calibration for the use of agent based models in market micro-structure. To date, there are no successful calibrations of agent based models to high frequency trading data. Here we test whether a more sophisticated calibration technique, SMC ABC, will achieve this feat on one …
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Modeling collective dynamics of social systems: Incorporating various social mechanisms into agent-based models
… behavior arising from collective dynamics in agent-based models (ABM) focusing on evolutionary and cognitive mechanisms. The first report demonstrates the coupled emergence of cooperation and selfish punishment behavior in groups of individuals playing an iterated public goods game. The second …
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Refining Behavioural Theories and Rules in Agent-Based Models to Enhance Dynamic Simulation of Urban Change
… is useful for planners to deliver evidence-based and adaptive policies for addressing current problems and pursuing future sustainability. Harnessing technologies such as geographic information system (GIS), approaches like agent-based modelling (ABM) have been applied to generate dynamic …
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Agent-based models of socio-hydrological systems for exploring the institutional dynamics of water resources conflict
… of this theory using comparative, simulation-based analysis of water resources systems in the USA and Spain. I determine whether, given two artificial societies experiencing water conflict, expanding institutional capacity would indeed lead to reduced conflict levels. I develop and apply two …
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Why Use Agent-Based Models To Explore Social Issues? The Case Of Intimate Partner Violence and Social Support Systems
… this thesis presents a spatially explicit agent-based model for simulating help-seeking behavior of battered women within informal and formal social support systems represented by friends, shelters and community service centers. Results from the model demonstrate the discrepancy between …
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HIGH PERFORMANCE AGENT-BASED MODELS WITH REAL-TIME IN SITU VISUALIZATION OF INFLAMMATORY AND HEALING RESPONSES IN INJURED VOCAL FOLDS
… improve the performance of complex biological agent-based models (ABM) simulations, more specifically simulations that are related to the inflammatory and healing responses of vocal folds at the physiological scale in mammals. The second direction involves improvements and extensions of the …
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Coupling Agent-Based Models with Bayesian Belief Networks in Social-Ecological Systems Modeling: The Role of Uncertainty in the Resilience of Semi-Arid Riparian Corridors in the Sonoran Desert
… remains a challenge. I developed a series of models to test the use of Bayesian modeling techniques in addressing human-based sources of uncertainty. The models were developed in two semi-arid river basins in the Sonoran Desert to represent model social-ecological systems with three …
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COMPUTATIONAL AND EXPERIMENTAL STUDIES ON NETWORK FORMATION
… three gaps in the current network formation models utilized by social scientists, including sociologists, economists, and cognitive scientists. Here, we wanted to unveil and move beyond certain hidden assumptions and necessary simplifications that lie behind existing mathematical and …
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