âBush lost reelection largely because of a recession that had already ended well before voting day,â frum wrote. The Twilight Vindication of George H.W. Bush Mark K. Updegrove October 20, 2013. As frum notes, Cruz is âa hugely smart, highly focused political player, with a clear-eyed view of political realities.â.
In biologically inspired neural networks, the activation function is usually an abstraction representing the rate of action potential firing in the cell.
In neural cells, there are three superfamilies of extracellularly activated ligand-gated ion channel subunits: the receptors of the Cys-loop superfamily (nicotinic receptors, 5-HT3 receptors, GABA-A and GABA-C receptors, glycine receptors, and some glutamate, histamine, and serotonin-activated anionic channels), the ATP-gated channels (ATP2x receptors), and the glutamate-activated cationic channels (NMDA receptors, AMPA receptors, kainate receptors etc.).