Baleanu, DumitruMahmoudi, Mohammad RezaMaleki, MohsenBorodin, KirillPho, Kim-HungBaleanu, Dumitru2020-12-252020-12-252020Mahmoudi, Mohammad Reza...et al. (2020). "On comparing and clustering the spectral densities of several almost cyclostationary processes", Alexandria Engineering Journal, Vol. 59, No. 4, pp. 2555-2565.1110-01682090-2670https://hdl.handle.net/20.500.12416/4406In time series analysis, comparing spectral densities of several processes with almost peri-odic spectra is an interested problem. The contribution of this work is to give a technique to com-pare and to cluster the spectral densities of some independent almost periodically correlated (cyclostationary) processes. This approach is based on the limiting distribution for the periodogram and the discrete Fourier transform. The real world examples and simulation results indicate that the approach well acts. (C) 2020 The Authors. Published by Elsevier B.V. on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/ 4.0/).eninfo:eu-repo/semantics/openAccessAlmost Periodically Corre-Lated ProcessesAlmost Cyclostationary ProcessesClassificationClusteringSpectral DensityArticle5942555256510.1016/j.aej.2020.03.043