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Knowledge-based systems and environments, : : : 1_z4jz8MM9R-Avs62KC08XGQ -…
Knowledge-based systems and environments
Knowledge based system
A knowledge-based system (KBS) is a form of artificial intelligence (AI) that aims to capture the knowledge of human experts to support decision-making.
Architecture
Interface :arrow_right: Inference Engine :arrow_right: Knowledge Base
Knowledge Base
Sentence = assertion about the world
AXIOM if given not derived
Knowledge representation language
Add sentence and query knowledge base = TELL and ASK
May involve inference
Multi-agent environments
Planning - cooperation and coordination
Each agent makes its own plan
How can they coordinate actions so that shared goal is reached?
Wumpus world
Wumpus world Agent
The Wumpus World’s agent is an example of a knowledge-based agent that represents Knowledge representation, reasoning and planning.
Knowledge-Based agent links general knowledge with current percepts to infer hidden characters of current state before selecting actions. Its necessity is vital in partially observable environments.
Environment properties of Wumpus world
Partially Observable: knows only the local perceptions
Single-agent: The knowledge-based agent is the only agent whereas the wumpus is considered as the environment’s feature.
Deterministic: outcome is precisely specified
Sequential: subsequent level of actions performed
Static: Wumpus, pits are immobile
Discrete: discrete environment
Logical agents
Humans - not just reflex (immediate) reactions
Reasoning based on internal representations of knowledge
Pathfinding agents limited
Hence, Need a knowledge base for an expert system
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