Page 296 - Concise Encyclopedia of Robotics

Sense/Plan/Act
and tasks are called nodes. The nodes are interconnected by relations.
This breaks reasoning down in a manner similar to the way sentences are
diagrammed in grammar analysis. The main difference is that a semantic
network is not limited to any single sentence; it can build on itself indef-
initely, so that it represents more and more complex scenarios.
An example of a semantic network is shown in the illustration. The
nodes are circles, and the relations are lines connecting the circles. The situ-
ation can be inferred. Additions can be made. (Use your imagination.)
Lives Apart- Is in
Joe Building
in ment
Is a Is in
Who New
Man Cigars
smokes York

Has

Is on Has
Hair Nose Red
color

Semantic network

Some researchers believe that semantic networks are more versatile than
another common reasoning device, known as expert systems. Compare
EXPERT SYSTEM.
See also IF/THEN/ELSE.
SENSE/PLAN/ACT
See HIERARCHICAL PARADIGM, HYBRID DELIBERATIVE/REACTIVE PARADIGM, and REACTIVE PARADIGM.

SENSOR COMPETITION
In some robotic systems, more than one sensor is used to detect a single
percept, or stimulus in the environment. Sensor competition is the use of

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