Study of Stationary Load Increase of Computer-Network Traffic via Dynamic Principal-Component Analysis

Figure 1

Detection performance for the scheme using major PCs, minor PCs, and the combined scheme. The line in red corresponds to the significant level.

(a) 𝑑^major₁ and 𝑑^major₂ for the test data with 𝜙₁=0.6 and 𝜙₁=0.7, respectively

(b) 𝑑^minor₁ and 𝑑^minor₂ for the test data with 𝜙₁=0.6 and 𝜙₁=0.7, respectively

(c) 𝑑^major₁ and 𝑑^major₂ for the test data with 𝜙₁=0.6 and 𝜙₁=−0.7, respectively

(d) 𝑑^minor₁ and 𝑑^minor₂ for the test data with 𝜙₁=0.6 and 𝜙₁=−0.7, respectively

(e) 𝑑^combined₁ and 𝑑^combined₂ for the test data with 𝜙₁=0.6 and 𝜙₁=0.7, respectively

(f) 𝑑^combined₁ and 𝑑^combined₂ for the test data with 𝜙₁=0.6 and 𝜙₁=−0.7, respectively