chapter01 - Chapter 1: Introduction to Expert Systems...

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Chapter 1: Introduction to Expert Systems Expert Systems: Principles and Programming, Fourth Edition
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Expert Systems: Principles and Programming, Fourth Edition 2 What is an expert system? “An expert system is a computer system that emulates, or acts in all respects, with the decision-making capabilities of a human expert.” Professor Edward Feigenbaum Stanford University
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Expert Systems: Principles and Programming, Fourth Edition 3 Fig 1.1 Areas of Artificial Intelligence
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Expert Systems: Principles and Programming, Fourth Edition 4 Expert system technology may include: Special expert system languages – CLIPS Programs Hardware designed to facilitate the implementation of those systems
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Expert Systems: Principles and Programming, Fourth Edition 5 Expert System Main Components Knowledge base – obtainable from books, magazines, knowledgeable persons, etc. Inference engine – draws conclusions from the knowledge base
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Expert Systems: Principles and Programming, Fourth Edition 6 Figure 1.2 Basic Functions of Expert Systems
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Expert Systems: Principles and Programming, Fourth Edition 7 Problem Domain vs. Knowledge Domain An expert’s knowledge is specific to one problem domain – medicine, finance, science, engineering, etc. The expert’s knowledge about solving specific problems is called the knowledge domain. The problem domain is always a superset of the knowledge domain.
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Expert Systems: Principles and Programming, Fourth Edition 8 Figure 1.3 Problem and Knowledge Domain Relationship
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Expert Systems: Principles and Programming, Fourth Edition 9 Advantages of Expert Systems Increased availability Reduced cost Reduced danger Performance Multiple expertise Increased reliability
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Expert Systems: Principles and Programming, Fourth Edition 10 Advantages Continued Explanation Fast response Steady, unemotional, and complete responses at all times Intelligent tutor Intelligent database
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Expert Systems: Principles and Programming, Fourth Edition 11 Representing the Knowledge The knowledge of an expert system can be represented in a number of ways, including IF- THEN rules: IF you are hungry THEN eat
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12 Knowledge Engineering The process of building an expert system: 1. The knowledge engineer establishes a dialog with the human expert to elicit knowledge. 2. The knowledge engineer codes the knowledge explicitly in the knowledge base. 3.
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This note was uploaded on 05/12/2010 for the course IT expert sys taught by Professor Dr. during the Spring '10 term at Dubai Aerospace Enterprise University.

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chapter01 - Chapter 1: Introduction to Expert Systems...

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