1. Preserving and Applying Human Expertise: Knowledge-Based Systems
Chapter 8
Preserving and Applying Human Expertise: Knowledge-Based Systems
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

2. Chapter Objectives
Introduce the student to the internal operation of knowledge-based systems, including:
Knowledge representation
Automated reasoning
Introduce the art of knowledge engineering - how to develop knowledge-based systems
the tools
the techniques.
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

3. Section 8.1 Objectives Introduction of chapter contents
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

4. Section 8.2 Objectives
Introduces a knowledge-based system from the points of view of those that work with them:
The user
The knowledge engineer
Introduce the different components of a KBS
The inference engine
The knowledge base
The user interface
The fact base
The development environment
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

5. Section 8.3 Objectives
Introduce the various means of representing knowledge:
rules
frames
The most important section in this chapter
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

6. Section 8.4 Objectives
Introduce the means of manipulating the knowledge found in a knowledge base.
Reasoning with frames
Reasoning with rules
Forward reasoning
Backward reasoning
The second most important section in this chapter
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

7. Section 8.5 Objectives
Introduce issues in developing knowledge based systems
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

8. Section 8.6 Objectives
Introduce the tools available for developing knowledge-based systems.
Inductive shells
Rule-based shells
Hybrid shells
Special purpose shells
Developing a system from scratch
Brief discussion of the CLIPS KBS development environment.
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

9. Section 8.7 Objectives Summarize the chapter Provide Key terms
Provide Review Questions
Provide Review Exercises
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

10. Figure 8.1 Intelligent Program User Interface User Workspace
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

11. Knowledge Acquisition Tool Developer’s Interface
Figure 8.2
Development Shell
Intelligent Program
Knowledge Acquisition Tool
Knowledge base
Test Case Database
Inference Engine
Developer’s Interface
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

12. Figure 8.3
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

13. Figure 8.4
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

14. Figure 8.5
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

15. Figure 8.6
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

16. AVELINO’S- AUTOMOBILE
Figure 8.7
VEHICLE
Generic frame
AUTOMOBILE
Generic frame
COUPE
Generic frame
MUSTANG
Generic frame
AVELINO’S- AUTOMOBILE
Instance-level frame
(Describes a real automobile)
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

17. Figure 8.8
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

18. Figure 8.9
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

19. Step 2 – Conflict Resolution
Figure 8.10
Facts
Facts
New Facts
Step 1 –
Match
Step 2 – Conflict Resolution
Step 3 -
Execution
Applicable
Rules
Selected
Rule
Knowledge
Rules
New Rules
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

20. Figure 8.11
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

21. Conclusions The student should be familiar with:
Rules and how they are used to represent and exercise conditional knowledge.
Frames and how they are used and exercise structured knowledge.
The meaning of a knowledge-based system shell and the types of shells commercially available.
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall

22. Preserving and Applying Human Expertise: Knowledge-Based Systems
Chapter 8
Preserving and Applying Human Expertise: Knowledge-Based Systems
Becerra-Fernandez, et al. -- Knowledge Management 1/e -- © 2004 Prentice Hall