Chapter 4 Knowledge Representation (continue)

1
Chapter 4Knowledge Representation (continue)

323-670 Artificial Intelligence ??.??????
?????????????? ??????????????????????????
?????????????? ????????????????????????
2
Property Inheritance
3
Frame

• Baseball-Player
• isa Adult-Male
• bats (EQUAL handed)
• height 6-1
• batting-average .252
• figure 4.7

• The End

Inferential Knowledge figure 4.7
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Procedural Knowledge as Rules

• The End

similar to figure 4.7
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Redundant Representation

• The End

John punched Mary
Mary punched John
6
Similarity Net
liking among set of frame

• The End

7
Knowledge Representation

• important attribute isa and instance
• relationship among attributes
• at what level of detail should the world be
  represented?
• Mary is Sues cousin. ??????????????????
• Mary daughter(brother(mother(Sue)))
• Mary daughter(sister(mother(Sue)))
• Mary daughter(brother(father(Sue)))
• Mary daughter(sister(father(Sue)))
• Mary daughter(sibling(parent(Sue)))

• The End

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Knowledge Representation

• John broke the window
• Sequence ? ...... pick up hard object ,
  Hurl
  the object to the window
• Cause hand / foot to move fast and crash into the
  window
• Shut the window so hard that the glass breaks
• Finding the right structure
• John went to Sizzer last night. He ordered a
  large rare steak, paid his bill, and left.
• Did john eat dinner last night?
• John flew to New York.
• John flew a kite.
• John flew down the street.

• The End

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Frame Problem

• The End

• on(plan12,table34), under(table34, window13),
  and in(table34,room15) the facts may change
• run out of memory when description is very
  long
• above(ceiling, floor) this fact never change

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End Chapter 4

• The End

• Even if you're on the right track,

• you'll get run over if you just sut there.

Will Rogers