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Topics: more AI

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.

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Topics: more AI

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  1. Topics: more AI Expert systems. Genetic algorithms. Neural Networks. Review for midterm

  2. Catch-up • Anyone try duolingo? • Anything else? • Reactions to presentations?

  3. Artificial Intelligence • is an old-fashioned term. • Complaint was that anything that worked ceased to be termed AI and so AI never had successes.

  4. Expert systems • [also old-fashioned term] • Collect large number of itemsif 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

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

  6. 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.

  7. 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.

  8. Reactions to reading • What do you think?

  9. 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.

  10. 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'.

  11. Midterm review • Questions?

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