Abstraction and Models - Abstraction and Models Abstraction...

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bstraction and Models Abstraction and Models Concepts that are general and abstract often are superior to narrower concepts
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aradigm #1 ( oland Paradigm #1 (Voland) Needs Assessment Problem Formulation Implementation Abstraction and Synthesis Analysis
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bstraction Abstraction general idea A general idea The essence of a thing Apart from special circumstances Theoretical
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ngineering Models Engineering Models Consist of linked abstractions that can vary from simple to extremely complex Require measurements and validation Allow us to estimate the performance of systems, components, or processes without actually having to build and test them We may be able to “run the model backwards” to determine what design is necessary to achieve a desired level of performance The appropriate model must be selected and used correctly
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Step 1 : Break the Problem Down into Sub problems or Components egins during problem formulation Begins during problem formulation Classify important design aspects of problem Can represent Parts (beams, columns, bearing blocks, deck) Materials (concrete, steel, soil) Processes (water clarification, disinfection) Physical or chemical properties (brightness, strength, flowrate)
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lect a level of conceptualization Select a level of conceptualization tomic (crystalline structure) Atomic (crystalline structure) Molecular (type of plastic) Single part or element (lens) System of components (traffic light head) Multiple systems (coordinated traffic signals) stems + Environment (Eastern during peak Systems + Environment (Eastern during peak hours)
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Step 2: Use Recognized Models for Conceptualization gineering mechanics Engineering mechanics Statics ynamics Dynamics Strength of materials id hi Fluid mechanics Structural analysis
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idely Used Models Widely Used Models ansportation Engineering Transportation Engineering Highway capacity tersection capacity Intersection capacity Simulations of traffic flows at busy intersections i t t it Transit system capacity Accident reconstruction Airport runway capacity Travel demand forecasting models Network models
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idely Used Models Widely Used Models Environmental Engineering Waste treatment processes Water treatment processes
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This note was uploaded on 06/04/2010 for the course CEE 110 taught by Professor Unlv during the Spring '10 term at University of Nevada, Las Vegas.

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Abstraction and Models - Abstraction and Models Abstraction...

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