Table 2.

Experimental results of STFT in fundamental LSTMs

	Trend	Exp. (I) (%)	Exp. (II) (%)	Exp. (III) (%)	Exp. (IV) (%)	Exp. (V) (%)	Exp. (VI) (%)
Precision	Up	29.63	51.89	31.84	49.78	34.09	32.87
	Flat	68.55	73.14	68.99	71.97	70.77	72.58
	Down	24.06	43.86	24.06	23.81	34.52	42.31
Recall	Up	11.62	21.74	12.89	19.82	14.71	14.61
	Flat	71.89	80.49	71.89	75.36	75.53	74.67
	Down	8.30	15.72	8.41	9.74	10.98	16.67
F1-Measure	Up	16.69	30.64	18.35	28.35	20.55	20.23
	Flat	70.18	76.64	70.41	73.62	73.07	73.61
	Down	12.35	23.15	12.47	13.82	16.67	23.91
Accuracy		57.40	66.80	57.87	62.60	61.33	62.67