Research on Online Learners’ Course Recommendation System Based on Knowledge Atlas in Smart Education Cloud Platform

Table 1

Data set statistics.

Edition	Number of users	Number of labels	Number of scores	Sparsity
100K	945	0	10million	93.63%
1M	6040	0	100 million	95.53%
10M	71565	95580	1000 million	98.60%
20M	138490	465560	2000 million	99.46%