Browsing by Author "Nasibov, Efendi N."

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Citation - WoS: 54
Citation - Scopus: 67
On the nearest parametric approximation of a fuzzy number
(ELSEVIER SCIENCE BV, 2008) Efendi N. Nasibov; Sinem Peker; Nasibov, Efendi N.; Peker, Sinem
Many nearest parametric approximation methods of fuzzy sets are proposed in the literature. It is clear that the specific approximations may lead to the loss of information about fuzziness. To overcome this problem most of these methods rely on the minimization of the distance between the original fuzzy set and it approximation But these approximations mostly are not flexible to the decision maker's choice. Hence in this paper we offer a parametric fuzzy approximation method based on the decision maker's strategy as an extension of trapezoidal approximation of a fuzzy number. This method comprises the selection of the form of the parametric membership function and its evaluation. (c) 2007 Elsevier B.V. All rights reserved.
Citation - WoS: 5
Citation - Scopus: 4
Time series labeling algorithms based on the K-nearest neighbors' frequencies
(Pergamon-Elsevier Science Ltd, 2011) Efendi N. Nasibov; Sinem Peker; Nasibov, Efendi N.; Peker, Sinem
In the current paper time series labeling task is analyzed and some solution algorithms are presented. In these algorithms fuzzy c-means clustering which is one of the unsupervised learning methods is used to obtain the labels of the time series. Then K-nearest neighborhood (KNN) rule is performed on the labels to obtain more relevant smooth intervals. As an application the handled labeling algorithms are performed on bispectral index (BIS) data which are time series measures of brain activity. Finally smoothing process is found useful in the estimation of sedation stage labels. © 2010 Elsevier Ltd. All rights reserved. © 2011 Elsevier B.V. All rights reserved.