Induction of decision making rules for context sensitive systems

Article Abstract:

System design and analysis of highly context-sensitive systems is both a difficult and time consuming problem. An induction program is discussed that greatly mitigates this problem. The Operational Evaluation Modeling (OpEM) Induction program receives, as input, a case file generated by an OpEM discrete event simulation program. Each case consists of a decision fact plus all knowledge base facts available for this decision (i.e., the decision context). The OpEM induction program analyzes this set of cases and produces an optimal set of rules that decides all of these cases correctly. An OpEM directed graph model is presented that describes the complex, context-sensitive parallel processes of a single-track railroad system, and a Pascal simulation of this railroad system is described to demonstrate that effective decision rules can be induced from extracted expert knowledge obtained from simulation generated cases. A description of the OpEM induction program is provided, and rules generated by it are compared with rules generated by Ross Quinlan's ID3 Induction program using the same set of cases. (Reprinted with permission of the publisher.)

Computer programming, Technical, Set theory, Cybernetics, Induction (Logic), Adaptive control, Fuzzy Sets, Inductive Reasoning, Context-Sensitive Help, Global Variables

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Operational evaluation modeling

Article Abstract:

A graphical parallel process language is described that assists a system designer in visualization of system operation. Visualization is essential when building an operational model to experiment with alternative system operation and architectures and to evaluate design tradeoffs. Such visualization is also essential for the knowledge engineering necessary to implement object oriented, rule based decision making in a simulation program. A Pascal simulation programming system is discussed that has been developed to implement the graphical language and rule based control. (Reprinted by permission of the publisher.)

Systems analysis, Parallel processing, GUI, Graphical user interfaces, Rule-Based System, Visualization

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Discrete event simulation of object movement and interactions

Article Abstract:

A set of routines is described that assist a programmer in modeling object movement and interactions. Interactions occur when objects move in range or leave range of other objects. Interaction events are rescheduled automatically as objects change vectors. Routines are written in Pascal to take advantage of its dynamic memory allocation capability and minimize memory requirements. An airport simulation demonstrates use of the routines. (Reprinted by permission of the publisher.)

Airports, Product introduction, Continuous Simulation, Discrete Simulation, New Technique

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