Research on Trajectory Data Releasing Method via Differential Privacy Based on Spatial Partition

Table 1

Notations that will be used.

Notation	Explanation
	a trajectory in dataset
	generalized trajectory in noisy dataset
	dataset has multiple trajectories
	radius of the stand deviation circle
	radius of the weighted stand deviation circle
	location universe and the location set at each timestamp i
	location universe and location set at timestamp i after dividing
	center of location set after dividing in the timestamp i, jth set
	set of trajectory count number in dataset
	distance set in adjacent trajectory count number
	the noisy dataset and the published dataset