• Article  

      Aggregation of spectral density estimators 

      Chang, Christopher C.; Politis, Dimitris Nicolas (2014)
      Given stationary time series data, we study the problem of finding the best linear combination of a set of lag window spectral density estimators with respect to the mean squared risk. We present an aggregation procedure ...
    • Article  

      Biological applications of time series frequency domain clustering 

      Fokianos, Konstantinos; Promponas, Vasilis J. (2012)
      Clustering methods are used routinely to form groups of objects with similar characteristics. Collections of time series datasets appear in several biological applications. Some of these applications require grouping the ...
    • Article  

      Clustering of biological time series by cepstral coefficients based distances 

      Savvides, A.; Promponas, Vasilis J.; Fokianos, Konstantinos (2008)
      Clustering of stationary time series has become an important tool in many scientific applications, like medicine, finance, etc. Time series clustering methods are based on the calculation of suitable similarity measures ...
    • Article  

      Spectral density ratio based clustering methods for the binary segmentation of protein sequences: A comparative study 

      Ioannou, Androulla; Fokianos, Konstantinos; Promponas, Vasilis J. (2010)
      We compare several spectral domain based clustering methods for partitioning protein sequence data. The main instrument for this exercise is the spectral density ratio model, which specifies that the logarithmic ratio of ...
    • Article  

      Spectral estimation 

      Fokianos, Konstantinos (2010)
      Wereview spectral analysis and its application in inference for stationary processes. As can be seen from the list of references, the practice of spectral analysis is widespread in diverse scientific and engineering fields, ...