Basics 2 min read
Approaches to Knowledge Representation
Simple relational knowledge The simplest way of storing facts is to use a relational method where each fact about a…
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Basics 4 min read
Knowledge Representation
What to Represent? Let us first consider what kinds of knowledge might need to be represented in AI systems: Objects…
Basics 2 min read
Means-Ends Analysis
Allows both backward and forward searching. This means we could solve major parts of a problem first and then return…
Basics 2 min read
And-Or Graphs
Useful for certain problems where The solution involves decomposing the problem into smaller problems. We then solve these smaller problems.…
Advanced 8 min read
Heuristic Search
A heuristic is a method that might not always find the best solution but is guaranteed to find a good solution in reasonable…
Basics 3 min read
Problems and Search
Problem solving involves: problem definition — detailed specifications of inputs and what constitutes an acceptable solution; problem analysis; knowledge representation;…
Basics 1 min read
Why use this data structure?
It enables attribute values to be retrieved quickly assertions are indexed by the entities binary predicates are indexed by first…
Advanced 2 min read
Extending Semantic Nets
Here we will consider some extensions to Semantic nets that overcome a few problems (see Exercises) or extend their expression…
Advanced 2 min read
Inference in a Semantic Net
Basic inference mechanism: follow links between nodes. Two methods to do this: Intersection search — the notion that spreading activation out of two…
Advanced 1 min read
Representation in a Semantic Net
The physical attributes of a person can be represented as in Fig. 9. Fig. 9 A Semantic Network These values can also be…
Advanced 3 min read
SEMANTIC NETS
A semantic net (or semantic network) is a knowledge representation technique used for propositional information. So it is also called a propositional net. Semantic…