Topics: more AI

libyantawdryAI and Robotics

Oct 23, 2013 (3 years and 9 months ago)

86 views

Topics: more AI

Expert systems. Genetic
algorithms. Neural Networks.
Review for midterm

Catch
-
up


Anyone try duolingo?


Anything else?



Reactions to presentations?



Artificial Intelligence


is an old
-
fashioned term.


Complaint was that anything that worked
ceased to be termed AI and so AI never
had successes.

Expert systems


[also old
-
fashioned term]


Collect large number of items

if A, B, … true, then do X, and/or declare
V, W, … to be true.


The ES engine keeps track of what is
known and determines a next step.


One of the first applications was for
medical diagnosis: Mycin


Posting / talk possibility

Note


so
-
called check lists for medical
procedures are considered a best practice.

Abominable abdominal report


My experience in about 1970: study large
set of symptoms and initial and confirmed
diagnoses


Critical reaction/finding for me what that
the PI very much did not want a natural
language interface. Material was too
technical.

Genetic algorithms


Based on notion of DNA combining and
successful strands lasting…


Needs a way to encode proposed
solutions to [your] problem.


Combine, perhaps with some random
effects, perhaps based on goodness of
solution. Repeat.


Inspired by chromosomes and evolution.


Reactions to reading


What do you think?

Neural networks


Inspired by general idea that new
connections are established in the brain.


Again, need to encode candidate
solutions.


Try connections. If connections work or
work better, than the connection is given
more strength; otherwise less strength.


Iterate: making new connections.

Reflection


general versus specific approaches to problems


Another general solution is to bring in people or
evidence of some kind.
Cloud sourcing.


Part of Google search is to establish page
-
rank based
on links from sites to sites. Note: new idea is to
feature links from 'your friends'….


Duolingo


Note: captcha using 2 clues assumes that if you got
'theirs' correct, then it assumes you probably were
correct on the other one. Does 'take a vote'.

Midterm review


Questions?