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CCEA GCE DT Expert Systems
CCEA GCE DT Expert Systems
11
Computer Science
Advanced
02/01/2022

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Cards

Term
Parts of an Expert System
Definition
Knowledge Base
Inference Engine
User Interface
Shell
Term
knowledge engineer
Definition
a team of programmers and technical experts needed to create an expert system
Term
Domain expert / human expert
Definition
An expert who is an experienced practitioner in a particular field
Term
knowledge base
Definition
The knowledge base holds knowledge about the domain.
Term
How knowledge is stored in the knowledge base
Definition
stored as a series of facts and IF THEN-ELSE rules
Term
Factual Knowledge
Definition
the factual information acquired by the knowledge engineers from the human experts, relating to the subject domain. This type of information would be widely agreed.
Term
Heuristic Knowledge
Definition
information about accurate judgement and the ability to estimate and evaluate. Such rules are not derived from logic alone but are derived from a person’s experience.
Term
How knowledge for the knowledge base is aquired
Definition
from a variety of sources
* talking to experts
* structured interviews
* unstructured interviews
Term
Inference engine
Definition
this is software that is designed to consult the knowledge base
it allows users to ask th KB questions
Term
User Interface
Definition
this allows a user to communicate with the Expert System
Term
ES shell
Definition
this is a general ES with
* an empty knowledge base
* an inference engine
* a user interface

It can be tailored for specific uses
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