Uri Wilensky's An Introduction to Agent-Based Modeling: Modeling Natural, PDF

By Uri Wilensky

ISBN-10: 0262731894

ISBN-13: 9780262731898

The introduction of frequent quickly computing has enabled us to paintings on extra advanced difficulties and to construct and learn extra complicated versions. This e-book offers an advent to 1 of the first methodologies for study during this new box of wisdom. Agent-based modeling (ABM) bargains a brand new method of doing technology: via carrying out computer-based experiments. ABM is appropriate to complicated platforms embedded in average, social, and engineered contexts, throughout domain names that diversity from engineering to ecology. An creation to Agent-Based Modeling bargains a finished description of the middle suggestions, tools, and purposes of ABM. Its hands-on strategy -- with countless numbers of examples and routines utilizing NetLogo -- allows readers to start developing types instantly, despite adventure or discipline.

The booklet first describes the character and intent of agent-based modeling, then offers the technique for designing and development ABMs, and eventually discusses the way to make the most of ABMs to respond to advanced questions. beneficial properties in each one bankruptcy contain step by step courses to constructing versions basically textual content; textual content bins with additional info and ideas; end-of-chapter explorations; and references and lists of correct interpreting. there's additionally an accompanying site with the entire types and code.

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Additional resources for An Introduction to Agent-Based Modeling: Modeling Natural, Social, and Engineered Complex Systems with NetLogo

Sample text

Describing the preceding rules in the NetLogo language is straightforward. Here, for example, is one translation of rules 1–3 into NetLogo code: If not carrying-food? [ look-for-food ] if carrying-food? [ move-towards-nest ] wander ;; if not carrying food, look for it ;; if carrying food turn back towards the nest ;; turn a small random amount and move forward This code snippet is not the complete implemented model but it does describe the core components that go into the Ants model. To complete the model we need to describe each of the subcomponents (such as “move-towards-nest,” and “look-for-food,” and “wander” and “look-for-food” will need to describe the ant’s sniffing for pheromone).

As the clock ticks, they continue to move and turn, move and turn, moving clockwise along the circle. Now suppose that we slightly alter these rules. 5 units while still turning one degree. 1 Some arrows moving clockwise around a circle of radius 20. pattern that we see? Before reading further, take a moment to imagine what the pattern will be. Most people do not predict the resulting pattern. We have heard people predict that the arrows will move onto a larger circle, a smaller circle, a flower shape, and many others.

7), which would typically model the environment as a grid of cells with trees occupying certain cells. Modeling the spread of fire consists simply of giving rules to the cells that are on fire as to when to spread to neighboring tree cells. This representation is so simple, we have seen elementary school students comprehend and explore it. They can experiment to see how different densities of trees in the forest affect the fire spread and they can modify the basic model to ascertain the effects of wind, or wood type, or fire source.

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An Introduction to Agent-Based Modeling: Modeling Natural, Social, and Engineered Complex Systems with NetLogo by Uri Wilensky


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