4 papers
Worst-Case Utility Privacy Mechanism via Pointwise Maximal Leakage
Ci Song, Tobias J. Oechtering
We propose a discrete privacy mechanism exploiting beneficial properties of the novel privacy measure Pointwise Maximal Leakage (PML). Given the utility assignment characterized by…
Mobile phone data reveal spatiotemporal dynamics of Omicron infections in Beijing after relaxing zero-COVID policy
Xiaorui Yan, Ci Song, Tao Pei +4
The swift relaxation of the zero-COVID policy in December 2022 led to an unprecedented surge in Omicron variant infections in China. With the suspension of mandatory testing, track…
Length L-function for Network-Constrained Point Data
Zidong Fang, Ci Song, Hua Shu +5
Network constrained points are referred to as points restricted to road networks, such as taxi pick up and drop off locations. A significant pattern of network constrained points i…
Identifying Aggregation Artery Architecture of constrained Origin-Destination flows using Manhattan L-function
Zidong Fang, Hua Shu, Ci Song +4
The movement of humans and goods in cities can be represented by constrained flow, which is defined as the movement of objects between origin and destination in road networks. Flow…