A* search - artificial intelligence, Computer Engineering

Assignment Help:

A* Search - artificial intelligence:

A* search in the combines is the best parts of uniform cost search, namely the fact that it's optimal and complete, and the other best parts of greedy search, namely its speed. This kind of searching strategy simply combines the path cost function g(n)  and the heuristic function  h(n)  by summing them to form a new heuristic measure f(n): 

f(n) = g(n) + h(n) 

Remembering that g(n) gives the path cost from the start state to state  n and h(n) estimates the path cost from n to a goal state, we see that f(n) estimates the cost of the cheapest solution that passes through n. 

The most important aspect of A* search is that, given only one restriction on h(n), it is possible to prove the search strategy there which is complete and optimal. The restriction to h(n) is that it must all the time underestimate the cost to reach a goal state from n. Such heuristic measures are called admissible. Look at Russell and Norvig for proof that A* search with an admissible heuristic is complete and optimal.


Related Discussions:- A* search - artificial intelligence

Operating system, define request edge and assignment edge

define request edge and assignment edge

Explain two dimensional array, Explain two dimensional array In two dim...

Explain two dimensional array In two dimensional arrays, array is a pointer-to-pointer-to-data type.: at the first level, it points to a block of pointers, one for each row. Th

How to clear computer motherboard cmos password, As CMOS is a special chip ...

As CMOS is a special chip with its own battery, the best way to clear out a CMOS chip is to cut off it from its power supply. To clear the CMOS password you just take away the

Combinatorial and scheduling problems, Combinatorial and Scheduling Proble...

Combinatorial and Scheduling Problems: One class of problems is concerned with specifying optimal scheduled. A classical example is the Travelling Salesperson Problem where

What is parsing, What is parsing? Parsing is the process of analyzing a...

What is parsing? Parsing is the process of analyzing a text, formed of a sequence of tokens, to find out its grammatical structure regarding a specified formal grammar. Parsing

Odd-even merging circuit, Odd-Even Merging Circuit Let's firstly unders...

Odd-Even Merging Circuit Let's firstly understand the idea of merging two sorted sequences using an odd-even merging circuit. The functioning of a merging circuit is as given b

State the disadvantages of interviewing, State the Disadvantages of  inter...

State the Disadvantages of  interviewing -  can be expensive to carry out    -  can be a very time consuming exercise -  Unable to remain anonymous

What are the aspects of CAD, What are the aspects of CAD Increased use ...

What are the aspects of CAD Increased use of computers has led to many of the above affects. Other aspects to consider include: -  deskilling of the work force (for illustra

Cloud computing, what is the scope of doing a final year project on cloud c...

what is the scope of doing a final year project on cloud computing?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd