Download Expert System - Clydebank High School

Expert Systems
Processor of a computer is known as the ‘brains’
of a computer. However, a processor cannot
think or act for itself.
Computers do have some form of intelligence this is
know as Artificial Intelligence.
An Expert System is a type of Artificial Intelligence
Program.
Artificial Intelligence
The use of programs to enable machines to
perform tasks which humans perform using their
intelligence.
Mimic the learning capability of a human or animal.
• Asimo – Robot
• AIBO – Sony Dog
Expert System
A program which uses a large database of knowledge about one
particular subject. It can make decisions and offer advice on that
particular subject.
For example:
• diagnose human illnesses (nhs direct)
• make financial forecasts
• schedule routes for delivery vehicles (AA route planner)
• Chemical Analysis
• Troubleshooting process
Some expert systems are designed to take the place of human
experts, while others are designed to aid them.
An expert system is made up of three parts:
TheCoding
screen
is
created,
the interface
for
Database
ofor
facts
and rules.
This
is the
job
programming.
Known
as the
user.
This
is known
as explanatory
of the
knowledge
engineer.
This process is
Inference
engine.
interface.
called knowledge
acquisition.
•
would
the program
•• Programmer
Collection
User Friendly
of all
interface
the create
factsis created
• All the facts are typed into a database
Examples:
http://www.nhsdirect.nhs.uk/selfhelpguide/
www.theaa.com/travelwatch/planner_main.jsp
Advantages - Credit
1. Training of humans can be expensive. Expert
systems can be copied.
2. Computers are accessible. Don’t get sick, go on
holiday.
3. Contain accumulated knowledge from more than
one human.
Disadvantages - Credit
1. Inflexible can only act within the rules that they
have.
2. Expert systems have no common sense.
3. Expert system cannot skip steps.
1. Get a route to Alton towers Save page into
your word processing folder
2. Lake district – Lake Windermere
3. Milton Keynes shopping centre
4. London
From Shelley Drive Clydebank
NHS direct
Pain in left side of abdomen
Sharp pain in left shoulder