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

Risks by merchant perspective in electronic payment system, What are the ri...

What are the risks by merchant's perspective in Electronic Payment Systems? Through merchant's perspective: • Copied or Forged payment instruments • Insufficient funds in

Define programmed i/o, Define Programmed I/O. It is the result of input...

Define Programmed I/O. It is the result of input and output instructions written in the computer program. Every data item transfer is initiated by an instruction in the program

Advantages of edi (electronic data interchange), Advantages of EDI 1.  ...

Advantages of EDI 1.  EDI replaces paper transactions with electronic transactions therefore it saves times and speeds up transactions. 2.  It gives a legal record of busine

Difference between external and global variables, Global variables are acce...

Global variables are accessible only to the batch program while external variables can be referenced from any batch program residing in the similar system library.

Interactive computer graphics.., graphical adapters and input methods in co...

graphical adapters and input methods in computer graphics

Architecture, write a program in assembly language using emu8086 so that th...

write a program in assembly language using emu8086 so that the input string can contain both lower and upper case letters and any other character and the output will be the reverse

Explain the structure of a c program, Explain the Structure of a C Program?...

Explain the Structure of a C Program? Each C program consists of one or more functions one of the which must be main(). A function name is forever followed by a pair of parenth

What is an operating system, What is an operating system?  An operating...

What is an operating system?  An operating system is a program that handles the computer hardware. It acts as an intermediate among users of a computer and the computer hardwar

Fundamental issues of concerns for instruction set design, Q. Fundamental i...

Q. Fundamental issues of concerns for instruction set design? A number of fundamental issues of concerns for instruction set design are: Completeness: For an early design

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