Class notes
CP468 - Artificial Intelligence CHAPTER 4 NOTES
- Institution
- Wilfrid Laurier University (WLU )
Class notes (textbook + lecture)
[Show more]
Seller
Follow
Content preview
, LOCAL SEARCHfrom start state to
Local search
algorithms operate by searching a
•
neighboring states , without
keeping track of the paths ,
nor the
set of states that have been reached
•
These algorithms are not systematic [they
might never explore a portion
of the search space where a solution actually resides]
advantages
:
2 key
•
→ (1) Use
very little memory
→ (2) Often find reasonable solutions in large or infinite state
spaces for which systematic algorithms are unsuitable
Local search
algorithms can also solve optimization problems in which the
•
,
aim is to find the best state accordingto an objective function
•
If state corresponds to an objective function , then the aim is to
find the highest peak a maximum and we call the process
global
- -
hill -
climbing
•
If elevation corresponds to cost then the aim is to find the lowest
,
valley -
a
global minimum and we call it gradient descent
-
HILL CLIMBING
Hill climbing does not look ahead beyond the immediate neighbors of
•
the current state
•
start :
whenever
•
Repeat :
move to the best neighboring state [ heads in the direction that
provides the steepest ascent]
•
If no
neighbor is better than current
,
quit
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller dg22. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for CA$13.67. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67096 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now