Table 2.

Neural network trained to recognize λ operators

Network	Index	Index coding/levels	Prototype	Test
NWOp (5)	RI ∗ (BvH)	Coarse/6, 4	5 operators (5 seq-OL3) >0.98	λ l (48,485 seq) >0.98 5902, 35591, 35615, 35635, 37951, 37974
				λ r (48,485 seq) 37998
Result				100% TP
				0% FP*

See Discussion concerning sequence at position 5,902. Coordinates are given to the left edge of the site on the first strand. The underlined coordinates indicate known operator locations. NWOp had 106 input neurons, 8 middle-layer neurons, and 2 output neurons. The learning rate was 0.6 and the momentum was 0.4. The training file consisted of 2,000 copies of each of the five operator sequences plus 7,577 random sequences. OR2 and OR3 were flipped in orientation in the prototype group to maximize the redundancy index of that group; as a result, they appear to be located on the wrong strand. In all training cases, sequences were drawn from the training file in random order dictated by a random number generator. TP, true positives; FP, false positives.