Bidirectional search-artificial intelligence, Basic Computer Science

Bidirectional Search-Artificial intelligence:

We've concentrated so far on searches where the point of the search is to search a solution, not the path to the solution. In another search, we know the solution, and we know the first state, but we don't know how to get from one to the other, and the point of the search is to search a path. In these cases, in addition to searching forward from the first state, we may sometimes also search backwards from the solution. This is known a bidirectional search.

For example, suppose the 8-puzzle game in the diagram below, where the point of the game is to move the pieces around so that they are set in the right hand diagram. It's likely that in the search for the solution to this puzzle (given an arbitrary starting state), you must start off by moving some of the pieces around to get some of them in their end positions. Then, as you got nearer to the solution state, you must work backwards: by asking yourself, how can I get from the solution to where I am at the moment, then reversing the seek path. In this type of case, you've used a bidirectional search.

128_Bidirectional Search.png

Bidirectional search has the advantage that search conduct in both directions is only required to go to a depth half that of usual searches, and this may often lead to a strong reduction in the number of paths looked at. For example, if we were searching for a path from one town to other through at mainly six other towns, we only need to look for a journey through 3 towns from both directions, which is easy to do, compare to searching every paths through 6 towns in a normal search.

Posted Date: 10/2/2012 2:33:51 AM | Location : United States







Related Discussions:- Bidirectional search-artificial intelligence, Assignment Help, Ask Question on Bidirectional search-artificial intelligence, Get Answer, Expert's Help, Bidirectional search-artificial intelligence Discussions

Write discussion on Bidirectional search-artificial intelligence
Your posts are moderated
Related Questions
Paper System : When setting up a computer system you need to ask yourself 'Does the system you plan to operate work manually, i.e., on paper?' It is a popular misconception that t

Design Problem 1. Implement a basic file system managed from within a file. The file system should have the following capabilities: i. List files stored along with their sizes.

Question 1 Write a note on advantages and disadvantages of Linux 2 Write a note on "File Permissions" on linux 3 Explain the usage of following Linux commands Cd kill

function to delete a telephone book record in c programing using struct and objects...?

Computerised Systems : You would have realized by now that computing systems are most useful for manipulating information. Any organisation and management of information basically

File Sharing Architecture:   The development of microprocessor, PC and LAN transformed dumb terminals into -smart? clients. This brought a complete change in the computing env

Assess the reliability of data gathered via paid Internet users. Describe and assess the evaluation method being used by the testing company, i.e., nonvisual and verbal recording o

How to make a stale marriage program by implementing the Gale Shapley algorithm using Java program

The following are required: Create a project in Access.  Your database must have flow and a theme. The database must be normalized.  The content m