From: robertlayton@gmail.com   
      
   On Apr 1, 8:46 pm, castiro...@gmail.com wrote:   
   > Question: In Neural and Bayesian nets, is every node updated on every   
   > clock pulse?  Or are selective ones?  I am thinking that you could   
   > (not a pro.) update weights O( f ) less and grow the number of   
   > connections O( f ).  What kind of advanced AI is going on?   
      
   There are times not all nodes require updating.   
      
   Start at the end, adjust the weights on the output layer, then work   
   back layer by layer adjusting only the nodes connected to the node(s)   
   you just updated. (for backprop and backprop related algorithms).   
      
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