REVIEW TEST 3 CS724

test on April 30,1997

Case Based Expert Systems

AskJef
  case library of interface designs
  metric of closeness base on application type
  some tailoring of example output based on closeness metric
Normal case based system
  find best case(s)
  fixup case
  (in some systems - add case to case library)
  
SYSTEMS THAT LEARN
  induction system
    NN train - back propagation of error values (BP), test
  GA mutation crossover


COMPUTATIONAL LINGUISTICS
traditional grammar notation vs systemic grammar
  grammars have traditionally been used to describe the common
    structure of the sentences in the language (e.g. TGG)
  a systemic grammar is used to describe how the utterance (sentence)
    is used or what effect the sentence is to cause



LADDER: systemic grammar, can handle some forms of ellipsis

PROGRAMMING
NN or GA
some sort of NL processing


COMPUTATIONAL LINGUISTICS
goal for grammar: describe all valid English sentences
    and no sentences not part of English
grammar
  sentence forms
  paraphrasing
  agreement (number, sex, person)
  TGG (SD SC) (parse tree)
  ATN and DCG
representation of sentence
  slot filler notation (also case grammar)
    i.e. (verb: kiss agent:John object: Mary)
  parse tree
  semantic network
models for processing language
  batch model (the way compilers work)
    parse creating a parse tree
    pass parse tree to semantic processor
    semantic processor produces answer, interpretation or commands
  integrated processing
    grammar rule and end processing intertwined