ICT Chapter 3

What are expert systems?

An algorithm that represents the knowledge of an expert

Examples of expert systems and what they decide?

Doctor: What illness someone has

Judge: What jail sentence someone should have

Engineer: What part of a car is broken

What are the advantages of an expert system?

You can use an expert system when someone is not available

An expert system will make the same decision without any bias

What are the disadvantages of an expert system?

Not everything can be reduced in logical tests

Experts can be wrong which would make the algorithm wrong too

What is a decision tree?

A tree that shows all the decisions

What is machine learning?

A way of making the computer solve an algorithm without needing to write an algorithm

What are the types of training in machine learning?

Supervised learning: The computer that is given a lot of data that has been organised and labelled

Unsupervised learning: The computer is given a lot of data which is not organised and labelled

Reinforcement learning: The computer starts by producing random or undirected signals or actions

Deep learning: Combines the other methods into a highly complex learning process

what are the advantages of machine learning?

You don’t need to tell the computer on how to solve the problem

what are the disadvantages of machine learning?

The computer needs a lot of data

What are the uses of machine learning?

Diagnosing illnesses

Weather forecasting

Understanding speech

Spotting computer viruses