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

Information technology infrastructure, The IT infrastructure of MobTex is s...

The IT infrastructure of MobTex is simple but vital to the operation of the business. All client data, billing, stock management etc is done via a specialised application called "A

Greedy search - artificial intelligence, Greedy Search - artificial intelli...

Greedy Search - artificial intelligence: If we have a heuristic function for states, defined as above, so we can simply measure each state with respect to this measure and ord

What is an accessor in c++, An accessor is a class operation that does not ...

An accessor is a class operation that does not change the state of an object in C++. The access or functions require to be declared as const operations

An algorithm, find cos(x) and sin(x) an pseudocode (while loop

find cos(x) and sin(x) an pseudocode (while loop

Grid security, i just want the experiment to be taken , on Grid Security......

i just want the experiment to be taken , on Grid Security........

Explain direct broadcast & limited broadcast, Explain Direct broadcast & li...

Explain Direct broadcast & limited broadcast. Broadcast is a method to send a packet to all the stat ions on an exact network at once. Broadcast systems permit the possibility

Aussie wine tours awt, Business Narrative Aussie Wine Tours (AWT) condu...

Business Narrative Aussie Wine Tours (AWT) conduct tours of the wineries of Victoria's Yarra Valley wine region. The tours take place on the last Sunday of each month. Currentl

Functions for message passing, Functions for Message Passing: MPI proc...

Functions for Message Passing: MPI processes don't share memory space and one process can't directly access other process's variables. Therefore they need some form of communi

Describe the types of flip-flops and latches, Describe the types of flip-fl...

Describe the types of flip-flops and latches. Flip-flops are of two types as illustrated below: a. Positive edge triggered b.  negative edge triggered Latches are

System software, what can be the good projects for system software subject

what can be the good projects for system software subject

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