Common problem with hill climbing, Computer Engineering

Common problem with Hill climbing:

An alternative way of justifying the problem is that the states are boards with 8 queens already on them, so an action is a movement of one of the queens. In this type of case, our agent can use an evaluation function and do hill climbing. Which, it counts the number of pairs of queens where one can take the other, and only moves a queen if the movement reduces the number of pairs of that. When there is a choice of movements both resulting in the same decrease, the agent can be chosen one randomly from the choices. In this sequence the 8-queens problem, and there are only 56 * 8 = 448 possible ways to move one queen, so that's why our agent only has to calculate the evaluation function 448 times at each stage. If it single chooses moves to where the situation with respect to the evaluation function improves, so it is doing hill climbing or gradient descent if it's better to think of the agent going downhill rather than uphill.

A common problem with this search strategy is a local maxima: the search has not been yet reached at a solution, but it one of the way to go downhill in terms of the evaluation function. For example, we could get to the stage where only two queens can take each other, to moving any queen increases this number to at least three. In cases like this, the agent can do a random re-start whereby they randomly choose a state to start the whole process from again. This search strategy has the appeal of never requiring be store more than one state at any one time that is the part of the hill the agent is on. Russell and Norvig make the analogy that this kind of search is like trying to climb Mount Everest in the fog with amnesia, but they do concede that it is often the search strategy of choice for some industrial problems.

Posted Date: 1/10/2013 4:34:19 AM | Location : United States







Related Discussions:- Common problem with hill climbing, Assignment Help, Ask Question on Common problem with hill climbing, Get Answer, Expert's Help, Common problem with hill climbing Discussions

Write discussion on Common problem with hill climbing
Your posts are moderated
Related Questions
How does a computer know whether an arriving frame contains an ARP message? Explain. The type field into the frame header gives that the frame contains an ARP message. A sender

Question: (a) Explain how a Mobile Terminating call, from a PSTN phone, is processed in a GSM network. Illustrate your answer with a diagram. (b) Top-Net, a new telecommuni

What is a Spool request? Spool requests are formed during dialog or background processing and placed in the spool database with information about the printer and print format.

Convert decimal 153 to octal. Equivalent in octal will be ? Ans. (153) 10 = (231) 8

The customers visit the website and browse through the products, looking at pictures and products details. When the customer finds his desired product, he usually adds it to his ca

Appropriate Problems for Decision Tree Learning : However remember there that is a skilled job in "AI" to choose exactly the right learning representation ormethod for a parti

Define Apple MobileMe Calendar The MobileMe Calendar is a web-based calendar that can be accessed from any computer linked to the Internet, Mac or Windows. What makes it more u

Communication displays give support in determining the frequency of communication, whether congestion in message queues or not, volume and the type of patterns being communicated e

Q. Characteristics of extreme unencoded micro-instructions? 1. Two sources can be attached by respective control signals to a single destination; though only one of these sourc

Engineering Applications A few of the engineering applications are: Airflow circulation over aircraft machinery, Simulations of simulated ecosystems. Airflow c