'Iterative deepening' diaporamas de présentation

Turing Machines

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Prolog for Linguists Symbolic Systems 139P/239P

Prolog for Linguists Symbolic Systems 139P/239P. John Dowding Week 10, December 3, 2001 jdowding@stanford.edu. Iterative Deepening. Addresses depth-first run-away Or exploring an infinite part of the search tree first If the program has a solution, ID will help you find it

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Iterative Deepening and Branch & Bound

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Basic Search Methods

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State Space Search and Planning

General Game Playing Lecture 4. State Space Search and Planning. Michael Genesereth Spring 2005. Outline. Cases: Single Player, Complete Information (today) Multiple Players, Partial Information (next time) Search Direction: Search Strategy:

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Logic Programming

Logic Programming. Lecture 7: Search Strategies. Outline for today. Problem representation Depth-First Search Iterative Deepening Breadth-First Search Advanced techniques taster Best-first search AND/OR (alternating) search. Search spaces. Set of states s 1 , s 2 ,...

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Iterative Deepening A*

Iterative Deepening A*. Algorithm A* has memory demands that increase exponentially with the depth of the goal node (unless our estimations are perfect). You remember that we improved the space efficiency of the breadth-first search algorithm by applying iterative deepening .

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Solving Problems by Searching

Solving Problems by Searching. Terminology. State State Space Initial State Goal Test Action Step Cost Path Cost State Change Function State-Space Search. Formal State-Space Model. Problem = (S, s, A, f, g, c). S = state space s = initial state A = set of actions

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Artificial Intelligence Presentation

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Epilog

Computational Logic Lecture 14. Epilog. Michael Genesereth Spring 2005. Overview.

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Logic Programming

Logic Programming. Lecture 7: Search Strategies: Problem representations Depth-first, breadth-first, and AND/OR search. Outline for today. Problem representation Depth-First Search Iterative Deepening Breadth-First Search AND/OR (alternating/game tree) search. Search problems.

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Solving Problems by Searching

Solving Problems by Searching. Terminology. State State Space Goal Action Cost State Change Function Problem-Solving Agent State-Space Search. Formal State-Space Model. Problem = (S, s, A, f, g, c). S = state space s = initial state A = actions

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Depth-First Search (DFS) Properties

Depth-First Search (DFS) Properties. Non-optimal solution path Incomplete unless there is a depth bound Exponential time Linear space. BFS. Comments on Iterative Deepening Search. Complexity Space complexity = O( bd ) Time Complexity

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Iterative Deepening

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Search in Artificial Intelligence

Search in Artificial Intelligence. Find the next move in chess, checkers. Scheduling: finding a good class schedule. Theorem proving: given a set of axioms and inference rules, find a proof of a theorem. Planning: find a sequence of actions to achieve a goal for a robot.

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Uniformed Search (cont.) Computer Science cpsc322, Lecture 6 (Textbook finish 3.5) Sept, 16, 2013

Uniformed Search (cont.) Computer Science cpsc322, Lecture 6 (Textbook finish 3.5) Sept, 16, 2013. Lecture Overview. Recap DFS vs BFS Uninformed Iterative Deepening (IDS) Search with Costs. Search Strategies. Search Strategies are different with respect to how they:.

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Chap 4. Informed Search Methods

Chap 4. Informed Search Methods. 4-1. Best-first search 4-2. Heuristic functions 4-3. Memory bounded search 4-4. Iterative improvement algorithms. 4-0. Preliminary. Reference: Chapter 4, Winston How to put heuristics? 1) as program codes 2) as rules 3) as parameters Role of knowledge

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Tree Searches

Tree Searches. Source: David Lee Matuszek. A tree search starts at the root and explores nodes from there, looking for a goal node (a node that satisfies certain conditions, depending on the problem).

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Artificial Intelligence for Games Depth limited search

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ARIN Practical 1: Representation and Uninformed Search

ARIN Practical 1: Representation and Uninformed Search. Exercise 1: Search Visit the uninformed search online demo page: http://www.cse.unl.edu/~choueiry/S03-476-876/searchapplet/

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