[pdp-discuss] normalizing factor?

[Brian Monroe]

Hi again,

Another question, this time regarding the normalization factor based on "expected activity level of the sending projection" (alpha_k, in equations 2.15 and 2.16 in "the book") in leabra.  I doesn't appear that the calculation of this factor is made explicit anywhere.  How precisely is this calculated?

Also, it doesn't appear there is an option to set this as a parameter anywhere.  Am I correct, or is alpha_k one and the same as "savg" that can be fixed?  And if it is not tunable, I would like the option to compensate for alpha_k with the absolute and/or relative projection scaling parameters to get limited or no normalization across projections.  Will this work?

Thanks,

Brian Monroe
Graduate Student
University of Southern California