How to detect the cyclostationarity in heavy-tailed distributed signals

P Kruczek, R Zimroz, A Wyłomańska - Signal Processing, 2020 - Elsevier
Many real phenomena exhibit non-Gaussian behavior. The non-Gaussianity is mainly
manifested by impulsive behavior of the real signals that, typically is not visible in the …

Codifference as a practical tool to measure interdependence

A Wyłomańska, A Chechkin, J Gajda… - Physica A: Statistical …, 2015 - Elsevier
Correlation and spectral analysis represent the standard tools to study interdependence in
statistical data. However, for the stochastic processes with heavy-tailed distributions such …

The modified Yule-Walker method for α-stable time series models

P Kruczek, A Wyłomańska, M Teuerle… - Physica A: Statistical …, 2017 - Elsevier
This paper discusses the problem of parameters estimation for stable periodic
autoregressive (PAR) time series. Considered models generalize popular and widely …

Cross-codifference for bidimensional VAR (1) time series with infinite variance

A Grzesiek, M Teuerle… - … in Statistics-Simulation and …, 2020 - Taylor & Francis
In this paper, we consider the problem of a measure that allows us to describe the spatial
and temporal dependence structure of multivariate time series with innovations having …

Bootstrap testing multiple changes in persistence for a heavy-tailed sequence

Z Chen, Z Jin, Z Tian, P Qi - Computational Statistics & Data Analysis, 2012 - Elsevier
This paper tests the null hypothesis of stationarity against the alternative of changes in
persistence for sequences in the domain of attraction of a stable law. The proposed moving …

Multivariate α-stable distributions: VAR (1) processes, measures of dependence and their estimations

MJ Karling, SRC Lopes, RM de Souza - Journal of Multivariate Analysis, 2023 - Elsevier
Measuring the dependency between lagged random vectors in time series is extremely
important to detect appropriate models for fitting real data. Vector autoregressive processes …

Measures of Dependence for α‐Stable Distributed Processes and Its Application to Diagnostics of Local Damage in Presence of Impulsive Noise

G Żak, M Teuerle, A Wyłomańska… - Shock and Vibration, 2017 - Wiley Online Library
Local damage detection in rotating machinery is simply searching for cyclic impulsive signal
in noisy observation. Such raw signal is mixture of various components with specific …

Spatio‐Temporal Dependence Measures for Bivariate AR(1) Models with α‐Stable Noise

A Grzesiek, G Sikora, M Teuerle… - Journal of Time Series …, 2020 - Wiley Online Library
Many real phenomena exhibit non‐Gaussian behavior. The non‐Gaussianity is manifested
by impulsive behavior of the real data that can be found in both one‐dimensional and multi …

Subordinated continuous-time AR processes and their application to modeling behavior of mechanical system

J Gajda, A Wyłomańska, R Zimroz - Physica A: Statistical Mechanics and its …, 2016 - Elsevier
Many real data exhibit behavior adequate to subdiffusion processes. Very often it is
manifested by so-called “trapping events”. The visible evidence of subdiffusion we observe …

Asymptotic behavior of the cross-dependence measures for bidimensional AR(1) model with stable noise

A Grzesiek, A Wyłomańska - arXiv preprint arXiv:1911.10894, 2019 - arxiv.org
In this paper, we consider a bidimensional autoregressive model of order 1 with $\alpha-$
stable noise. Since in this case the classical measure of dependence known as the …