الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
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Abstract
In the last two decades, a great deal of attention has been given for applying techniques that can cope with inexact and incomplete information in practical systems. Examples of systems that experience uncertain information are Artificial Intelligence (AI) applications and control systems.
Many procedures for improving the performance of control systems are based on the control strategies of human operators have already been published [1-9].
Expert systems are AI’s first commercially viable product. An expert system has two primary attributes. First, it allows us to enter information about a subject into the computer. This information is called the knowledge base. Second, it allows us to interrogate this knowledge base and it acts as thought it were an expert on the subject, which is the reason for its name.