best_above_threshold_connection
===============================

A connection between two layers of the same representation using
strength\_patterns.  The most active output dimensions of the source is
identified.  If this exceeds the `threshold` the output activity on this
dimension only is copied to the target's input, with other dimensions of the
target input zero.  Otherwise, the target's input is all zero.

Parameters
----------
	parameter	default_value
	threshold	0