Greedy search-artificial intelligence, Basic Computer Science

Assignment Help:

Greedy Search-artificial intelligence:

If we have a heuristic function for states, as defined above, then we may simply measure each state with respect to this measure and order the plan items in terms of the score of the state in the item. So, at every stage, the agent determines which state scores lowest and puts agenda items on the top of the plan which contain operators acting on that state. Like this, the most promising nodes in a search space are expanded before the less promising ones. This is a type of best first search known particularly as a greedy search.

In some situations, a greedy search may lead to a solution very rapidly However, a greedy search can frequently go down blind alleys that look promising to start with, but ultimately don't lead to a solution. Often the best states at the beginning of a search are actually really quite poor in comparison to those further in the search space. One way to counteract this blind-alley effect is to turn off the heuristic until a amount of the search space has been enclosed, so that the truly high scoring states can be identified. Another problem with a greedy search is that the agent will have to keep a record of which states have been explored in order to avoid repetitions (and ultimately end up in a cycle), so greedy search might keep all the agenda items it has undertaken in its memory. Also, this search method is not optimal, because the optimal solution can have nodes on the path which score faultily for the heuristic function, and thus a non-optimal solution will be found before an optimal one. (Remember that the heuristic function only estimates the path cost from a node to a solution).

 


Related Discussions:- Greedy search-artificial intelligence

Computer as a data processor, Computer as a Data Processor: The main f...

Computer as a Data Processor: The main function of a computer is to process the input data according to a specific program to produce the desired output. This is the reason wh

Computers, Computers One of the most  important invention in the desig...

Computers One of the most  important invention in the design of digital  circuits  is that  of the general- purpose "stored program" computer or device. Computers are a partic

Types of policy, want to get detail understanding of the types of security ...

want to get detail understanding of the types of security policies including enterprise security policy, issues specific policies etc

What is the difference between kernel mode and user mode fun, The differenc...

The difference between kernel mode and user mode gives a rudimentary form of security in the following manner. Convinced instructions could be executed only when the CPU is in kern

Explain kinematics modeling in virtual reality, Question 1 How can you cre...

Question 1 How can you create surface with 3D Scanner in geometric modeling? Question 2 Explain kinematics modeling in virtual reality Question 3 Describe object hierarc

Digital computer, Digital computer: In the digital computer there are b...

Digital computer: In the digital computer there are basically two types of input, namely Instructions, and Data from the various radio and non-radio sensors, which will be refe

Memory hierarchy, Memory hierarchy: There is another type of high spee...

Memory hierarchy: There is another type of high speed memory, known as Cache memory, which is used to increase the speed of processing by making current programs and data avai

Define interlibrary lending, QUESTION (i) Define each of the following ...

QUESTION (i) Define each of the following terms: a) Interlibrary lending b) Manuscript c) Papyrus d) Community profile e) Mauritiana (ii) Explain with example

Create email account, Create Email Account: For sending or receiving e...

Create Email Account: For sending or receiving email, you need to have to an email account. The email account may be provided by the organization for which you are working or

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