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

Advantages & disadvantages of public-key cryptography, Advantages & Disadva...

Advantages & Disadvantages Enhanced security and convenience: private keys never require be transmitting or revealing to anyone.  They can givce a method for digital signatu

Explain the pdca cycle, Explain the PDCA cycle. PDCA is a four step pro...

Explain the PDCA cycle. PDCA is a four step problem solving method. The following are the description of each step: 1. P - Plan (Devise your Plan). Identify an opportunity a

What is accumulator register, Q. What is Accumulator Register? Accumula...

Q. What is Accumulator Register? Accumulator Register (AC):  This register is used to store data temporarily for computation by Arithmetic and logic unit (ALU).  AC generally c

Parallel ports - micro-controller, The main I/O used by micro controllers a...

The main I/O used by micro controllers are the parallel ports , the 68HC11F1 has seven  8 bit ports namely Port A,B,C,D,E,F and G . The use of ports depends on the mode configurati

For what is defparam used, For what is defparam used? Though,  during  ...

For what is defparam used? Though,  during  compilation  of  Verilog  modules,  parameter  values  can  be  altered  separately  for every module instance. This allows us to pa

Operating system, define request edge and assignment edge

define request edge and assignment edge

Static or dynamic - artificial intelligence, Static or Dynamic - artificial...

Static or Dynamic - artificial intelligence An environment is static if it doesn't change while an agent's program is making the decision about how to act. When programming ag

Dbms., what is cascade rollback

what is cascade rollback

Prepare a decision tree, A part of an aircraft engine can be given a test b...

A part of an aircraft engine can be given a test before installation.  The test has a 75% chance of revealing a defect if it is present, and the same chance of passing a sound part

Set up to use parallel virtual machine, Q. Set up to Use parallel virtual m...

Q. Set up to Use parallel virtual machine? PVM employs two environment variables when starting and running. Each and every PVM user needs to set these two variables to employ P

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