. . . . . . . . . "6671"^^ . . . . . . "12069013"^^ . . . . . "Recurrence period density entropy"@en . . . "Recurrence period density entropy (RPDE) is a method, in the fields of dynamical systems, stochastic processes, and time series analysis, for determining the periodicity, or repetitiveness of a signal."@en . . . . . . . . "Recurrence period density entropy (RPDE) is a method, in the fields of dynamical systems, stochastic processes, and time series analysis, for determining the periodicity, or repetitiveness of a signal."@en . . . . . "986963206"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .