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

What is encapsulation technique, Hiding data within the class and making it...

Hiding data within the class and making it available only by the methods. This method is used to protect your class against accidental changes to fields, which might leave the clas

Find out lowest propagation delay time in logic family, Which the digital l...

Which the digital logic family has the lowest propagation delay time ? Ans. ECL is the digital logic family that has the lowest propagation delay time. In ECL lowest propagati

Distinguish between ROM, Distinguish between ROM, PROM, EPROM, EEPROM. ...

Distinguish between ROM, PROM, EPROM, EEPROM. Ans: ROM: It also called Read Only Memory is a Permanent Memory. The data is permanently stored and cannot be changed in Perm

Master scheduling , The alpha beta company generates two products; A and B,...

The alpha beta company generates two products; A and B, that are made from components C and D. Given the following product structures, master scheduling requirements and inventory

Explain logical shift micro-operations, Q. Explain logical shift Micro-oper...

Q. Explain logical shift Micro-operations? In logical shift data entering by serial input to left most or right most flip-flop (which depends on right or left shift operations

Determine Boolean identities using Boolean algebra, Prove the following ide...

Prove the following identities   a. A ‾B ‾C‾ + A ‾BC ‾ + AB ‾C ‾ + ABC ‾ = C ‾ b. AB + ABC + A ‾ B + AB ‾C = B + AC Ans. a. LHS = A'B'C' + A'BC' + AB'C' + ABC' =

Describe buffer of receiving process, Q. Describe buffer of receiving proce...

Q. Describe buffer of receiving process? MPI_Gather (Sendaddr, Scount, Sdatatype, Receiveaddr, Rcount, Rdatatype,Rank, Comm): 'Using this function process with rank' rank

What is race condition, What is Race condition? Race condition: The c...

What is Race condition? Race condition: The circumstances where several processes access - and manipulate shared data-concurrently. The last value of the shared data depends

Characteristics of a pipeline, What are the main characteristics of a pipel...

What are the main characteristics of a pipeline? Ans: The main characteristics of a pipeline are: a) The speedup or efficiency gain by suing a pipeline depends on the numbe

Explain the functional units of a basic computer, Question 1 Explain th...

Question 1 Explain the functional units of a basic computer with a neat diagram 2 What do you mean by addressing modes? List the different types of addressing modes 3 Exp

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