Table 4. The F1-score of the proposed model with different structures.

Name of the project	DNN-1	DNN-2	DNN-3	DNN-4	DNN-5	DNN-6	DNN-7	DNN-2 with 1,024 batch
ceylon-ide-eclipse	65.10	70.70	71.80	78.82	65.45	73.04	68.72	75.80
broadleafCommerce	86.09	84.16	84.70	81.43	77.43	81.14	81.54	85.12
hazelcast	57.48	56.21	52.63	59.80	40.81	56.49	53.64	63.77
elasticsearch	66.56	76.53	73.91	75.24	51.58	67.73	70.08	70.35
mapDB	77.20	80.74	81.91	82.99	76.62	84.24	78.90	82.75
netty	69.32	67.06	68.60	75.89	55.46	64.74	64.53	65.94
orientdb	72.97	73.40	70.25	75.09	61.65	66.87	67.55	69.97
neo4j	78.94	80.96	80.57	75.96	62.06	80.28	61.52	77.71
titan	75.71	82.52	79.59	79.97	80.20	73.32	81.15	81.00
mcMMO	69.62	69.96	66.54	68.10	69.11	73.35	68.14	64.34
Android-Universal-Image-Loader	76.10	76.63	78.03	78.89	71.24	79.60	76.39	77.50
antlr4	80.89	86.50	85.15	83.08	78.95	81.29	80.45	81.61
junit	75.21	80.03	78.90	83.73	77.63	78.67	75.49	79.73
mct	96.67	96.67	96.67	74.60	93.33	96.67	96.67	96.67
oryx	90.65	90.68	90.94	93.20	87.37	93.56	89.80	94.00
Average	75.90	78.18	77.34	77.78	69.92	76.73	74.30	77.75