An hybrid architecture is one where different moduels or layers use different kinds of AI technolgies. For example, we might use a random forest to perform low-level classification (say of human activity in a care setting), and then use these classes in a hand-crafted rule-based system (say "if suspected fall, alert warden").
Defined on page 124
Used on pages 124, 126, 144, 276, 440
Example of a hybrid architecture