What Is the Internet Water Army? A Practical Feature-Based Detection of Large-Scale Fake Reviews

Table 1

Symbol definition.

Notation	Definition
	A user who made a comment
	The set of reviews created by consumer i
	The number of reviews created by consumer i
	The total set of all the reviews
	A specific review j created by consumer i
	The time when this review is created
	The registration time of the consumer
	The brand of the product