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--- geopro:pedro:books:russell-norving [2008/03/10 16:57] – created 150.163.67.100
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+====== Artificial Intelligence: A Modern Approach======
+|Stuart Russell and Peter Norvig| Bib INPE: 681.3.019 R917A|
+====Intelligent Agents====
+[[http://www.leg.ufpr.br/~pedro/papers/books/chapter2-agents-russell-noving.pdf|pdf]]
-=====Artificial Intelligence: A Modern Approach=====
+{{  http://www.leg.ufpr.br/~pedro/figures/intelligent-agent.gif}}
-|Stuart Russell and Peter Norvig| Bib INPE: 681.3.019 R917A|
+An agent is anything that can be viewed as perceiving its environment through sensors
+and acting upon that environment through effectors.
+**Ideal rational agent:** For each possible percept sequence, an ideal rational agent should
+do whatever action is expected to maximize its performance measure, on the basis of the evidence
+provided by the percept sequence and whatever built-in knowledge the agent has.
+Specifying which action an agent ought to take in response to any given percept sequence
+provides a design for an ideal agent.
+A system is autonomous to the extent that its behaviour is determined by its own experience.
+Types of agents:
+^Simple reflex agents  |obey condition-action rules. |
+^Agents that keep track of the world  |Internal state in order to choose an action.  |
+^Goal-based agents  |Goal information, which describes the desired situations. Search and planning.  |
+^Utility-based agents  |Choose actions based on a definition of utility, a function that maps a state onto a real number.  |
+In some cases, a utility function can be translated into a set of goals, such that the decisions made by a goal-based agent using those goals are identical to those made by the utility-based agents.