The log transformation is often used to convert time series that are nonstationary with respect to the innovation variance into stationary time series. The usual approach is to take the log of the ...

I help people communicate data clearly with graphs. In “When Should I Use Logarithmic Scales in My ... to the original values or with the transformed values. We begin with a base of ten since ...

When there is a lack of an explicit model and networked signal space, traditional observability analysis and non-convex methods are ... we propose to combine a novel Log-Koopman operator and nonlinear ...