Grid-PPPS: A Skyline Method for Efficiently Handling Top-𝑘 Queries in Internet of Things

Figure 6

The comparison of the computing time of the Grid-PPPS and PPPS as 𝑑 and 𝑁 are varied related to Experiment 2.

(a) Computing time as 𝑑 is varied (𝑁=10K)

(b) Computing time as 𝑑 is varied (𝑁=100K)

(c) Computing time as 𝑑 is varied (𝑁=1000K)