Table 4: Experiment settings and parameters.

DatasetDateSensor. no.Reading. no.Atypical Data %

Oct. 20084,0763.4*107~2.3%
Nov. 20084,0523.3*107~3.7%
Sep. 20094,0763.3*107~4.0%
the severity threshold : 2%–20%, default 5%
the distance threshold : 1.5 mile–24 mile, default 1.5 mile
the time interval threshold : 15 min–80 min, default 15 min
the similarity threshold : 0.1–1, default 0.5
the g function: max, min, arithmetic mean, harmonic mean,
and geometric mean, default: arithmetic mean