002 Expert System
002 Expert System
002 Expert System
EXPERT SYSTEM
• Expert systems were the first major commercially successful product to emerge from
the study of artificial intelligence
• An expert system is a computer program that can do the work of a human expert
• An expert system can be defined as "a computer program that can draw reasoned
conclusions from a body of knowledge in a limited domain."
1. Classification
2. Diagnostic system
3. Scheduling & Planning
4. Monitoring
• A simple expert system may represent the knowledge of a single expert, but most
commercial expert systems represent the knowledge on many experts.
• The expert system can provide this consultation through a series of questions to the
user
• These include systems that provide medical, legal, or financial advice, but the range
of domains is expanding.
• MYCIN: used to recommend the correct dosage based on the patient's weight, and
diagnose various blood clotting diseases.
• DENDRAL: used in organic chemistry to detect unknown organic molecules with the
help of their mass spectra and knowledge base of chemistry.
• PXDES: used to determine the type and grade of a patient's lung cancer based on the
data.
• You are to create an expert system for medical diagnosis. List the
steps required to create and use this expert system.
• Expert systems take a different approach: they collect the small fragments of human
know-how into a knowledge base that is used to solve a problem using the
appropriate knowledge.
• Another problem within the knowledge base's domain can be solved using the same
program without reprogramming.
• The ability of these systems to explain the reasoning process through backtracking
and to deal with levels of confidence and uncertainty provides an additional feature
that conventional programming does not provide
• You are to create an expert system for medical diagnosis. List the
steps required to create and use this expert system.
• Available 24/7
• Emotionless
Sex: FEMALE
Age: 27
------- culture-1 -------
• The result was expert systems, computer programs that could give advice in a limited
area where it was possible to create facts and rules to represent knowledge.
• An expert system is an attempt to replace the human expert and make his knowledge
available in an inexpensive and imperishable form.