Ai-lect4 - 1 Last time Problem-Solving • Problem solving • Goal formulation • Problem formulation(states operators • Search for solution

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Unformatted text preview: 1 Last time: Problem-Solving • Problem solving: • Goal formulation • Problem formulation (states, operators) • Search for solution • Problem formulation: • Initial state • ? • ? • ? • Problem types: • single state: accessible and deterministic environment • multiple state: ? • contingency: ? • exploration: ? 2 Last time: Problem-Solving • Problem solving: • Goal formulation • Problem formulation (states, operators) • Search for solution • Problem formulation: • Initial state • Operators • Goal test • Path cost • Problem types: • single state: accessible and deterministic environment • multiple state: ? • contingency: ? • exploration: ? 3 Last time: Problem-Solving • Problem solving: • Goal formulation • Problem formulation (states, operators) • Search for solution • Problem formulation: • Initial state • Operators • Goal test • Path cost • Problem types: • single state: accessible and deterministic environment • multiple state: inaccessible and deterministic environment • contingency: inaccessible and nondeterministic environment • exploration: unknown state-space 4 Last time: Finding a solution Function General-Search( problem , strategy ) returns a solution , or failure initialize the search tree using the initial state problem loop do if there are no candidates for expansion then return failure choose a leaf node for expansion according to strategy if the node contains a goal state then return the corresponding solution else expand the node and add resulting nodes to the search tree end Solution: is ??? Basic idea: offline, systematic exploration of simulated state-space by generating successors of explored states (expanding) 5 Last time: Finding a solution Function General-Search( problem , strategy ) returns a solution , or failure initialize the search tree using the initial state problem loop do if there are no candidates for expansion then return failure choose a leaf node for expansion according to strategy...
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This note was uploaded on 01/20/2011 for the course CS 6810 taught by Professor Hecker during the Spring '10 term at CSU East Bay.

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Ai-lect4 - 1 Last time Problem-Solving • Problem solving • Goal formulation • Problem formulation(states operators • Search for solution

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