Hi Gabriel,
>> Could you help me about the problem "WORLD OF BLOCKS"?
The block world problem is about as canonical as you can get in production rule literature. You should have no trouble finding references. Just Google "blocks world".
Do you have a good textbook on expert systems? Every decent text will have an example of this problem, which is usually about planning using backward-chaining.
Your "goal state" consists of the arrangement of blocks that you want, and your rules will use sub-goals to find one or more "plans" that will arrange the blocks as defined by your goal-state.
See Chapter 7.23: Blocks World, pp. 424-435, "Expert Systems: Principles and Programming 4th Ed"., J. Giarratano, G. Riley, ISBN 0-534-38447-1
A working example program is given on pp.89-90, "Introduction to Expert Systems 3rd Ed.", Peter Jackson, ISBN 0-201-87686-8
Also, look up
Terry Winnograd's SHRDLU project. This paper looked interesting, too : http://linkinghub.elsevier.com/retrieve/pii/S0004370200000795
Dig into the resources above, and then come back with specific questions, OK?
BTW -- Why are students still being taught applets?
Unless it's an absolute
requirement, move to a more recent technology like Web 2.0 or at least
servlets/JSP. :-)
Cheers,
Jason
-----------------------------------------------------------
Jason Morris
Morris Technical Solutions LLC
consulting@...
(517) 304-5883
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