Since directly maximizing the conditional probability P θ (Y |X, G) is often intractable, we factorize the "global" probability as a product of "local" factor functions, each of which depends on a subset of the variables in the graph (Tang et al., 2013).
we use three kinds of functions to represent the local textual information of the vector (local textual attribute function), personal connection information between vectors (personal connection factor) and skill connection information between skills (skill connection factor), respectively.