Agents in Artificial Intelligence

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Agents in Artificial Intelligence : 


  • An agent is anything that can perceive its environment through sensors and acts upon that environment through effectors.
  • A human agent has sensory organs such as eyes, ears, nose, tongue and skin parallel to the sensors, and other organs such as hands, legs, mouth, for effectors.           
  • A robotic agent replaces cameras and infrared range finders for the sensors, and various motors and actuators for effectors.
  • A software agent has encoded bit strings as its programs and actions.


Agent Terminology :

• Performance Measure of Agent − It is the criteria, which determines how successful an agent is.•    Behavior of Agent − It is the action that agent performs after any given sequence of percepts.• Percept− It is agent’s perceptual inputs at a given instance.• Percept Sequence − It is the history of all that an agent has perceived till date.• Agent Function − It is a map from the precept sequence to an action.

       

The Structure of Intelligent Agents 

   Agent’s structure can be viewed as −

• Agent = Architecture + Agent Program

• Architecture = the machinery that an agent executes on.

• Agent Program = an implementation of an agent function.



Examples of Agent:-

  • A software agent has Keystrokes, file contents, received network packages which act as sensors and displays on the screen, files, sent network packets acting as actuators.
  • A Human agent has eyes, ears, and other organs which act as sensors and hands, legs, mouth, and other body parts acting as actuators.
  • A Robotic agent has Cameras and infrared range finders which act as sensors and various motors acting as actuators.

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