Design of Automatic Extraction Algorithm of Knowledge Points for MOOCs

Table 3

The results contrast.

	The 1st level of		The 2nd level of
Index	knowledge points		knowledge points
	TF-IDF	AECKP	TF-IDF	AECKP
ExpertsMark	66	66	258	258
All	80	80	250	250
Correct	31	48	121	193
Precision	47.0%	72.7%	46.9%	74.8%
Recall	38.8%	60.0%	48.4%	77.2%
measures	42.5%	65.7%	47.6%	76.0%