Lecture � CS182 Intelligent machines

Greg Detre

@14:30 Monday, September 30, 2002

 

use database look-up to prune the search space by providing shortcuts from certain states to certain other states � trading off space for time

you can define various rules for moving one piece to another position, but it doesn�t necessarily assume that it will leave the other spaces unchanged

you�re only using it to prune the search space for your heuristics(???)

 

heavy-tailed distribution

infinite variance and infinite mean�???

log-log scale � straight line

take advantage of, with randomisation (Gomes & Selman 1997)

 

Questions

A* is optimally efficient???

given the cost of hardware at a given moment, can you decide on an absolute minimal sweet spot within the time-space monetary cost trade-off???

heavy-tailed distribution???

constraint satisfaction vs NN???