Chapter 2 Intelligent Agents

CS461 Artificial Intelligence Pinar DuyguluSpring 20081 Chapter 2 Intelligent AgentsCS 461 Artificial IntelligencePinar DuyguluBilkent University, Spring 2008 Slides are mostly adapted from AIMACS461 Artificial Intelligence Pinar DuyguluSpring 20082 Outline Agents and environments Rationality PEAS (Performance measure, Environment, Actuators, Sensors) Environment types Agent typesCS461 Artificial Intelligence Pinar DuyguluSpring 20083 Agents An agent is anything that can be viewed as perceiving its environment through sensors and acting upon that environment through actuators Assumption: Every agent can perceive its own actions (but not always the effects)CS461 Artificial Intelligence Pinar DuyguluSpring 20084 Agents Human agent: eyes, ears, and other organs for sensors; hands,legs, mouth, and other body parts for actuators Robotic agent: cameras and infrared range finders for sensors; various motors for actuators A software agent: Keystrokes, file contents, received network packages as sensors Displays on the screen, files, sent network packets as actuatorsCS461 Artificial Intelligence Pinar DuyguluSpring 20085 Ag

cleaned up, amount of time taken, amount of electricity consumed, amount of noise generated, etc. • As a general rule, it is better to design performance measures according to what one actually wants in the environment. Rather than according to how one thinks the agent should behave (amount of dirt cleaned vs a clean floor)

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