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

Characteristics of large register file, Characteristics of large-register-f...

Characteristics of large-register-file and cache organizations Large Register File Cache Hold local variables for almost all functio

Example on hamming error correcting code, Q. Example on hamming error corre...

Q. Example on hamming error correcting code? For illustration a 4-bit matching word can stand for 2 4 =16 values that range from 0 to 15 as: 0000, 0001, 0010, 0011, 0100, 01

Relationship between distributed and mobile computing, a) Briefly describe...

a) Briefly describe the relationship between distributed computing, mobile computing and pervasive computing. b) Suppose the following scenario, which demonstrate the possibili

Find farthest distance from exchange where subscriber locate, An exchange u...

An exchange uses a -40 V battery to drive subscriber lines. A resistance of 250 ohms is placed in series with the battery to protect it from short circuits. The subscribers are req

How exceptions are handled in java, How exceptions are handled in java? ...

How exceptions are handled in java? Exception handing In Java: A java exception is an object which describes an exceptional condition which has occurred in a piece of code.

Build a tv remote control, Communication by devices, such as the HC11 proce...

Communication by devices, such as the HC11 processor, is a key and vital part of most systems that are used in military, commercial, and academic settings.  In fact, most of these

Define print resolution of printers, Q. Define Print Resolution of printers...

Q. Define Print Resolution of printers? Print Resolution is the detail which a printer can give considered by how many dots a printer can put in each inch of paper.  So the uni

Which term is associated with snmp, Which term is associated with SNMP? ...

Which term is associated with SNMP? MIB is related with SNMP.

DFD, Draw the Context level DFD for the Safe home Software.

Draw the Context level DFD for the Safe home Software.

What are the uses of interactive reporting, What are the uses of interactiv...

What are the uses of interactive reporting? The user can actively control data retrieval and show during the session.  Instead of an extensive and detailed list, you make a ba

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