WATTS D J . Six degrees[M]. Translated by CHEN Y,et al. Beijing: People’s University Publication HousePress, 2011.
[2]
ZHUGE H . Communities and emerging semantics in semanticlink network:discovery and learning[J]. IEEE Transactions on Knowledge and Data Engineering, 2009,21(6): 785-799.
[3]
MEHDI E , FRANCESCO R , NEIL R . A survey of active learning in collaborative filtering recommender systems[J]. Computer Science Review, 2016.
[4]
HANSEN P C . The truncated SVD as a method for regularization[J]. BIT, 1987(27): 534-553.
[5]
DEZA E , DEZA M M . Encyclopedia of distances[M]. Heidelberg: SpringerPress, 2009.
[6]
RODGERS J L , NICEWANDER W A . Thirteen ways to look at the correlation coefficient[J]. The American Statistician, 1988,42(1): 59-66.
GUO J R , WEI J W , ZHANG Y Y . Strategies for enhancing core capability of large-scalely operation for national telecom operators assisted by big data[J]. Telecommunications Science, 2018,34(1): 120-125.